Improvements in Electric Signalling Apparatus Chiefly Designed for Police Service.
Year: 1889

page_text: Date of Application, 5th Nov., 1889
Complete Specification Left, 26th Nov., 1889-Accepted, 28th Dec., 1889
PROVISIONAL SPECIFICATION.
[Communicated from abroad by FRANK EDWARD MORGAN, of No. 546, Chapel
Street, New Haven, County of New Haven, State of Connecticut, United States
of America.]
Improvements in Electric Signalling Apparatus Chiefly Designed
for Police Service.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, & Co., Patent Agents.
Southampton Buildings in the County of Middlesex do hereby declare the nature of
this invention to be as follows:-
This invention relates to electrical apparatus for police service, the object being to
facilitate communication between a central police-station and a number of sub-stations
under the direction thereof.
In carrying out this invention, a series of visual signals constituting with their
attendant mechanisms, sub-stations are distributed to the best advantage throughout
the field under surveillance, and provided with independent electrical connection with
a receiver located at the central station and adapted to electrically locate any one of
the sub-stations and reproduce a want or a message communicated therefrom.
The central-station apparatus consists, essentially, of the electrical receiver before
mentioned, a variable signal-transmitter provided with a rheotome and a plug, a
telephone outfit provided with a plug, and a switch-board having a spring-jack or
equivalent device, connected by a wire with each of the sub-stations in the field, the
said spring-jack being adapted to receive, as occasion may demand, the plug of the
variable signal-transmitter or that of the telephone outfit.
The said receiver is provided with one or more circular series of terminals,
respectively connected with the several sub-stations and with one or more circuit-
closers adapted to sweep over the terminals and successively make contact with them
so as to select the terminal of the sub-station which has had some one of its devices
operated.
The receiver also contains means for simultaneously breaking and closing all of the
sub-station circuits, and a mechanically operated locating-train, and a similarly
operated want or signal-train for operating the indicators which specify the number
of the sub-station calling and the message which it is desired to communicate there-
from. By preference the said want-train is automatically released by the current as
soon as the circuit-closer has found the terminal of the visual-signal calling.
The sub-station may take any approved form. It may be combined, for instance,
with a specially constructed lamp-post, adapted at its upper end to receive a colored
glass globe formning the visual-signal proper, and normally retired, but having
releasing connections, under the control of the central-station apparatus, whereby it.
may be released to enclose the light, whether that be a gas-flame, or any other means
of illumination. In this case the lamp-post will be constructed with a box which will
contain several instruments, including a variable signal-receiver having an indicator.
and a dial upon which a circular series of signals or wants are inscribed, the said
indicator being arranged to be swept over the dial and to be stopped against any of
the messages thereon. It contains a step by step movement, and is connected with a
magnet. The said box also contains a variable signal transmitter having a dial, with
a circularly arranged series of wants or messages inscribed thereon, and a pointer
arranged to be manually swept over the dial, and to be set against any of the said
messages or wants. The said transmitter also contains a magnet, and a step by step
movement, and is provided with a hasp which shuts over a thumb-nut secured to the
outer end of the arbor carrying the indicator, and provided for turning the same, the
said hasp operating to cut the transmitter out of circuit when its indicator is being

page_text: set. The said box also contains, by preference, an ordinary telephone. It is also
provided with a citizens-transmitter adapted to be operated by a key inserted through
a key-hole formed in the door of the box, and constructed so that after it has been
actuated by the key, it will retain the same, whereby the responsibility of having
operated the device may be attached to the person charged with the key, which can
only be liberated and removed from the door from the inside thereof. This citizens
transmitter is adapted to actuate the receiver at the central office in designating the
locality of the sub-station calling, and in signifying the nature of the call.
The sub-station is also provided with a peculiar switch or spring-jack, adapted to
receive a portable policeman's call-box, which, when thus connected with the sub-
station, will interrupt the circuit. so as to send in the number of the officer calling to
the central station, where it will be permanently recorded by means of a register
connected with a relay previously cut into connection with the receiver at the central-
station by placing the parts thereof in a particular position through the agency of the
variable signal-transmitter at the sub-station, the policeman operating the said
transmitter before he sends in his individual number by means of the portable
policeman's call-box which he carries, and the switch or spring-jack just referred to.
In using the apparatus embraced by this invention, the officer at the central station
causes the signal at any one of the sub-stations to be displayed by inserting into the
spring-jack in the central-office switch-board, corresponding to the sub-station at
which he desires to display the signal, the plug of the variable signal transmitter
located at the central office. In doing this he closes the circuit between the central
office and the particular sub-station at which he desires to throw up the visual-signal,
and through a magnet of corresponding resistance at the sub-station, the said magnet
being arranged to release the carrier of the signal-globe which is then lifted by
weights or other means.. The globe being so displayed, attracts the attention of the
officer within whose beat the sub-station is located. To close the said circuit the
officer at the central station sets the indicator of the variable signal transmitier
thereat to any message on the dial thereof which he may desire reproduced at the
sub-station. He then operates the rheotome in connection with the variable signal-
receiver at the central-station, whereby the circuit is interrupted so as to cause the
indicator of the variable signal-receiver located at the sub-station to be advanced
step-by-step to the message upon its dial corresponding to that to which the indicator
of the transmitter at the office was set. The first magnetization of the magnet of the
variable signal-receiver located at the sub-station operates to release the signal-globe
which will then be displayed. The officer on the beat in which the said sub-station
is located, seeing the signal-globe displayed, will come to the lamp-post and open the
door thereof, and read upon the dial of the variable signal-receiver the message waiting
there for him. He will then restore the globe and the indicator of the receiver to
their normal positions.
Should the officer desire to send a message from the sub-station into the central
office. lie opens the hasp of the variable signal-transmitter located at the sub-station.
and then sets the indicator of the said transmitter to the message which he desires
to have reproduced at the central station. He then closes the lasp, whereby the
circuit of the central-station is closed, and the receiver at the central-station set in
operation to locate the sub-station calling, and reproduce the message to which he
has just set the indicator of the variable signal transmitter.
In turn the officer at the central station may respond to his questions or communi-
cations, by means of the variable signal-transmitter located at the receiving station
and the signal receiver located at the sub-station. Or the officer at the sub-station
may ask the officer at the central station to cut in the telephone at the central station.
after which the officer at the central-station and the officer at the sub-station talk
through their telephones.
The sending in of a citizens call from the sub-station to the central station has
already been referred to, as has also the making of a permanent record from the sub-
station at the central station by means of an officer located at the sub-station.
The variable signal-transmitter located at the central-station and the variable signal

page_text: receiver located at each sub-station, are provided with magnets of higher resistance
than the other magnets of the apparatus and provision is anade for cutting these
magnets out when it is desired to operate the receiver at the central station.
The receiver located at the central station contains besides the features already
mentioned, a locking wheel, and a locking-lever for co-operation therewith, a make-
and-break-wheel located in the want train, a rocking-switch combined with the
gang-switch, an operating lever for restoring the several parts to the apparatus to
their normal positions after it has been operated, and drops and connections for
operating the same, the said drops being located upon the outside of the dial of the
apparatus and arranged to normally conceal characters thereon, which when exposed
are read with the circular series of numbers around the edge of the dial.
The variable-signal-transmitter located at the central station, the corresponding
instrument located at the sub-station and the variable signal-receiver located at each
sub-station, are each provided with a magnet and armature, an anchor-shaped pallet
connected with the said armature,a star-wheel embraced by the pallet,and an indicator
mounted upon the arbor of the star-wheel.
Dated this 15th day of November 1889
HASELTINE, LAKE, & Co..
45. Southampton Buildings, London, Agents for the Applicant.
Improvements in Electric Signalling Apparatus Chiefly Designed for
Police Service.
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings in the County of Middlesex do hereby declare the nature
of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:
In the accompanying drawings, forming a part of this specification,
Figure 1, is a view in front elevation of the central station apparatus, including
the receiver, the telephone, the variable signal-transmitter and the rheotome connected
therewith.
Figure 2. is a view in elevation and on a variable scale of the receiver with the door
thereof thrown open to disclose its mechanism.
Figure 3, is a view of the receiver in vertical section.
Figure 4, is a detached broken view partly in section and partly in elevation,
showing the rocking-switch combined with the rocking-bar of the gang-switch.
Figure 5, is a detached view in rear elevation of the apparatus attached to the
door of the receiver, and showing the heart-shaped cam whereby the signal-indicator
of the said apparatus is restored to its normal position, the means employed for
winding the locatingand signal trains of the apparatus and the switch for automatically
cutting out the starting magnet of the receiver, and cutting into the linea relay:
located at the central station, and having a register combined with it.
Figure 6, is a detached broken view in side elevation, showing the lower end of the
gang-switch-lever, and the bell of the receiver, and the provision made for closing
the circuit of the apparatus through to the starting magnet of the receiver.
Figure is a detached sectional view through the switch-board of the apparatus,
and showing one of the plug-switches thereof.
Figure 8, is a diagram showing the arrangement of circuits in the receiver and in
the other mechanisms located at the central station.
Figure 9 is a detached view of the variable signal-transmitter located at the
central station with its dial removed, the view being shown on the same sheet with
figure. 1.-
Figure 10, is a view in elevation of one of the lamp-posts forming a sub-station
and including a visual signal of the apparatus, as represented herein..
Figure 1 is an enlarged view with the top of the lamp-post and the standard

page_text: thereof broken away and with the door of the box forming the central section of the
post, open to show the several mechanisms located within it.
Figure 12 is a view partly in section and partly in elevation of the upper section of
the post to show the visual signal itself.
Figure 13 is a view of the box and the lower end of the upper section of the post
in vertical transverse section showing the mechanisms within the said box and section
in side elevation and in particular the provisions made for controlling the exhibition
and retirement of the visual signal.
Figure 14, is an enlarged detached broken view in side elevation showing the
connection of the visual signal with the armature of the magnet by which it is
controlled.
Figure 15 is a view in elevation of a variable signal receiver, such as are
located at the sub-stations with the dial thereof removed and placed at one side.
Figure 16, is a similar view of a variable signal-transmitter such as are used at the
sub-stations.
Figure 17, is a view of the said transmitter in vertical central section.
Figure 18, is a full sized view of the citizens transmitter showing the mechanism
thereof.
Figure 19, is a detached broken view partly in section and partly in plan, showing
by full and by broken lines the positions which the beveled pin of the key-lever takes
when the box is in its normal adjustment and after the key has been inserted into it
and turned and done its work.
Figure 20 a view partly in vertical section and partly in side elevation, showing, in
their normal positions of contact the two springs forming the terminals of a loop,
which includes the variable signal-receiver of the sub-station, and also showing the
beveled surface by which the said fingers are normally held in contact to keep the
circuit through the said receiver normally closed and by which they are allowed to
separate and cut the said receiver out of the line into which the citizens transmitter
is cut by its own automatic action.
Figure 21, a detached view in side elevation showing the key-lever which is
directly operated upon by the key and the retaining lever which locks the key in the
transmitter. after the same has been used to send in a signal.
Figure 22, is a detached view in front elevation of the switch provided at each
sub-station for use with a policeman's pocket-number-registering box.
Figure 23 is a view of such a box in side elevation.
Figure 24 is an edge view thereof.
Figure 25 is an interior view thereof, a portion of the case being removed to show
its mechanism.
Figure 26 is a detached plan view of the said mechanism, and
Figure 27 is a diagram showing the arrangement of circuits through the several
mechanisms located at each sub-station.
This invention relates to an improved apparatus for inter-communication between a
central Police station and a number of sub-police stations distributed throughout a
field under surveillance, the object being to provide means. First, for the silent
summoning from the central station, of any officer in the field to a sub-station
therein, so that communication may be had with the said officer. Second, for the
calling up of the central station from any sub-station in the field and establishing
telephonic, or code, communication between the sub-station and the central station.
or telephonic communication between the sub-station and another sub-station through
the central station, and Third, for the sending in of calls to the central-station from
the sub-stations by citizens possessing keys, which, as incidents of their use, are
retained at the sub-stations so as to attach the responsibility of the calls to the persons
making them. The invention has the further objects of establishing a closer con-
nection between a central police station and the field under surveillance, and between
different parts of the field, and thus promoting the efficiency of police service and
civil guardianship.

page_text: With these ends in view, the invention consists in a central-station and in a
sub-station apparatus, as will be hereinafter described and claimed.
In carrying out the invention, the central-station is provided with a receiver,
adapted to be started from any of the sub-stations, and to automatically locate them
and reproduce signals sent in from them. The central-station apparatus also includes
a switch-board, which, as shown in the accompanying drawings, is combined with the
said receiver, a telephone outfit, a variable signal-transmitter, a rheotome connected
with the magnet of the transmitter and as herein shown having the form of an
ordinary call-box, a relay and a register connected therewith. The particular
construction and operation of the devices above mentioned, will be fully described
later on.
In independent electric connection with a central-station, equipped with the above
mentioned apparatus, are placed a series of sub-stations of approved construction,
and distributed throughout the field under surveillance in the beats of the several
officers stationed therein. They may take a variety of forms, but preferably they
will have the form. of specialized lamp-posts, whereby the provision for lighting the
locality is made to subserve a further use. Each of these lamp-posts is provided with
a visual-signal adapted to be electrically displayed, under the control of the central-
station or mechanically from the post itself. Each lamp-post also contains a variable
signal receiver adapted to cooperate with the variable-signal-transmitter of the central
station, a variable-signal-transmitter adapted to cooperate with the receiver of the
central station, a citizens transmitter,also adapted to cooperate with the said receiver,
a telephone outfit and a switch for use with a policeman's pocket box. The particular
construction of the mechanism just above referred to, will be described later on.
The receiver. as herein shown, is designed for use in connection with three
hundred sub-stations, and has a case A, adapted to be secured to the wall of the
central-station oflice, and provided with a door B, carrying upon its outer face a
dial C, having a circular series of numbers, extending from 1 to 100, running from
right to left, and beginning at the center of its upper edge. Within this circular
series of numbers, and near the lower edge of the dial, the same is provided with the
numbers 1 and 2, formed in large characters, and normally concealed by drops D D.
carried by rotatible spindles E E, operated to reverse the positions of the drops, and
expose and conceal the said characters, which are respectively used with the outer
series of numbers to indicate all the numbers from 101 up to 200, and from 201 up
to 300, whereby the confusion which would result from, and the space which would
be required by, a series running from 1 to 300 is avoided. By the use of more drops
and numbers, the range of the receiver may be further increased without enlarging
the dial. Or, if desired. the apparatus may be provided with fewer numbers, its
capacity being determined in each case by the number of sub-stations with which it.
is to be connected.
A locating-indicator F. so called because it locates the sub-stations, is carried by
a rotating spindle G. projecting centrally through the dial, and is normally at
rest. being started and swept over the dial and stopped against the several numbers
in the series aforesaid. Within the number series. signals or wants, chosen with
special reference to the work to which the apparatus is to be adapted, are arranged
in a circular series of compartments H, and specified by a signal-indicator 1,
normally at rest over the zero or uppermost compartment, and secured to a sleeve J
mounted upon the spindle G aforesaid.
By opening the door B of the case A. a board K. removably secured to the back of
the case, is disclosed. This board contains a binding-post L for each of the whole
number of sub-stations, the said parts being connected by wires M with binding-
screws g located in the top of the case as shown by figures 3 and 8. Wires N lead
from the said posts L through an opening in the said board. to corresponding
contact-buttons O, arranged in three concentric circular series of one hundred buttons
each, and insulated each from the other in a flat rubber disk P, secured to a circular
metallic plate Q. held off from the board by means of pillars R. springing from a

page_text: metallic ring S, secured to the board, and inclosing an opening therein, the said
buttons constituting in effect the terminals of the special wires 232 leading to the said
binding-screws g of the respective sub-stations, of which those numbered from 1 to 100
have their terminals in the outer series of buttons, those of the sub-stations numbered
from 101 through 200 in the middle series of buttons, and those numbered from 201
through 300 in the inner series of buttons. Three circuit-closers T, each consisting
of a thin, flat spring, are respectively arranged to sweep the three series of buttons,
being attached to radial arms U. secured at equi-distant points to a rubber disk V,
mounted upon the inner end of a short shaft W. journaled centrally to the buttons,
in a three-armed frame X extending over the disk P, and having the ends of its arms
secured to the circular metallic plate Q. before mentioned.
Three brushes Y respectively secured to the three arms U, respectively sweep three
concentric rings Z, located in the circuit of the receiver, and insulated each from
the other in the disk P, the brush secured to the arm carrying the circuit-closer
sweeping the outer series of buttons, being arranged to sweep the outer ring, that
carried by the arm supporting the circuit-closer of the middle series, the middle ring,
and that carried by the arm of the circuit-closer of the inner series, sweeping the
inner ring. The outer end of the short shaft W has rigidly secured to it, a
locking wheel a, which is therefore permanently and positively coupled with the
circuit-closers, the same being rigidly connected. (through the arms U and the disk V)
with the said shaft, whereby the integrity of the relations between the locking-
wheel and the circuit-closers is always preserved, and reliability of communication.
secured. The face-teeth of the said wheel a are engaged by the short arm of a
locking lever b, pivoted to the frame X at a point below the wheel, and having the
free end of its long arm adapted to be engaged with an armature c, hung from it
upper end in bearings d, and located in the presence of the poles of a magnet e,
secured to the said board K as shown by Fig. 3. A spring fattached to the frame X.
and engaged with the short arm of the said lever, is provided for engaging the
said arm of the lever with the locking-wheel the moment the long arm of the lever is
released by the armature.
The said posts L are arranged in vertical-parallel rows in the upper portion of
the board K, and are normally engaged by circuit-closers h, secured to the inner
faces of perpendicular bars i, attached at their upper ends to a long cross-bar i, and
at their lower ends to a rocking-cross-bar k, the opposite ends whereof are journalled
in bearings 11, screwed to the said board, the said circuit-closers, perpendicular bars
and the cross-bar forming a gang-switch. The said circuit-closers are made of very
light metal, and shaped so that each one of them covers two of the binding-posts L.
Normally the said gang-switch is adjusted so that all of the circuits in the binding-
posts are closed by the engagement with them of the said circuit-closers h, all of
the said circuits being simultaneously broken and simultaneously closed by the rock-
ing of the switch which is provided with a long lever m attached at its extreme upper
end to the cross-bar j, and at its lower end to an outwardly extending post n secured
to the rocking-bar k. The lower end of this lever extends down through an opening o
formed in the bell-stud p, which is secured to the board K, and provided at its outer
end with a bell g. The said lever is provided at its lower end; and upon its outer
face, with a spring r. which engages, when the gang-switch is in its normal position,
with an adjustable contact-point s. mounted in the bell-stud, which is in the circuit
of the receivers, as will be hereinafter described. The extreme lower end of the
lever is cut away, see Figs. 3 and 7, for its engagement with the upper end of a
short tripping levert, pivoted to an outwardly projecting arm of a frame ». secured
to the board K. and having its lower end adapted to be engaged with the armature w
of a magnet secured to the said frame e, in which the said armature is hung on
centers. A rocking-switch #. secured to one end of the rocking-bar k is made of
insulating material and adapted to be engaged at its upper end, when the switch is
in its normal or closed position, with two spring-fingers 2 and 3, and at its lower
end, when the switch is in its open or dropped position, with similar spring-fingers

page_text: 4 and 5. The connections of these fingers 2 and 3 and 4 and 5 will be pointed out
hereafter.
A coupling-pin 6, projecting from the locking-wheel a, enters, when the door B is
closed, between the arms of a yoke 7. formed at one end of a counter-balanced arm 8,
secured to the inner end of the spindle G, carrying the locating-indicator I, which
is thus caused to operate in unison with the circuit-closers T as they sweep over the
contact-buttons 0. When the described coupling between the pin and yoke is made,
the circuit-closers T, the locking-wheel a and the said indicator 1, are for all pur-
poses of reliability of indication, positively coupled together.
The said spindle G is journalled in two frame-plates 9 and 10, secured together
and to the back of the door B. and corresponding to the two plates of a'clock move-
ment, and actuated by a heavy coiled spring 11, located between said plates, and
driving a train of wheels and pinions, including a pinion 12; and a wheel 13 mounted
on the spindle G, which is thus actuated. An escapement-wheel 14, engaged by a
pallet 15, controls the running of the train, which is normally locked by the engage-
ment of a stop-tooth 16, located upon the periphery of one of its wheels 17; which
is mounted on the same shaft with the escapement-wheel, with a detent formed by
the tail of an armature 18, located in the presence of the poles of the starting
magnet 19, mounted horizontally upon the upper edges of the plates 9 and 10, and
located over the train just described, the upper end of this armature being provided
with a finger 20, adapted to engage, when the magnet is energized and the armature
attracted to its poles, with a contact-point 21, insulated from the said plates. A light
spiral-spring 22, attached to this armaturé, serves to hold it normally away from the
poles of the magnet, with its tail in position to be engaged by the stop-tooth 16 of
the wheel 17. The said train, which may be called the locating-train because it drives
the locating-indicator, forms mechanical means for actuating the said indicator, leaving
nothing for the current to do, so far as locating the sub-station is concerned, but to
release the train, whereby the device may be operated with a very light current.
The said spindle G also carries the sleeve J of the signal-indicator 1. such sleeve
being, provided with a heart-shaped cam 23, the function of which will be set forth
later on. A pinion 24 frictionally coupled with the said sleeve meshes into an idle-
pinion 25, which in turn meshes into a pinion 26, secured to an arbor 27, journalled'
in the said plates 9 and 10, and carrying a pinion 28 and a wheel 29, constituting
elements of a train actuated by a coiled spring 30. forming the motive power for
the actuation of the signal-indicator I, and corresponding to the spring 11 before
described, the said train being controlled in running down by an escapement-wheel 31
and a pallet 32, shown by Figure 2 of the drawings. A make-and-break wheel 33,
(a rheotome). secured to the inner end of the arbor 27, and located in the main
circuit which includes the plates 9 and 10, is provided with cogs, which are engaged
by a spring-finger 34, mounted on a rubber-block 35. secured to the plate 10, and
connected by a wire 36 with one end of the coil of a magnet 37, located in the
main-circuit, mounted upon the upper edges of the plates 9 and 10, at a point over
the train of the spring 30, and provided with an armature 38, which is connected
with a lever 39, pivotally secured to the plate 10, and having its lower end normally
held in engagement with the cogs of the make-and-break wheel 33 by the spiral-
spring 22 before referred to, the said spring having one of its ends connected
with the armature 38. The train last mentioned may be called the signal-train,
because its function is to actuate the signal-indicator I which reproduces the
signals sent in from the sub-stations by specifying them upon the dial of the receiver.
This train thus forms mechanical means for operating the signal-indicator, leaving
nothing for the current to do, so far as the reproduction of the signal is concerned,
but to release the signal-train, whereby the apparatus may work with the minimum
of current. The signal-train has also another important function in actuating the
rheotome, and thus relieving the current of that work. Although the locating and
signal trains are herein shown to be operated by springs, it is apparent that they may
be operated by weights if desired.

page_text: The spindles E E, (see Fig. 2.) carrying the drops D D, (see Fig. 1) at their
forward ends are respectively mounted in heads 40, secured to the back of the door B
Each spindle is provided at its rear end with a counter-weight 41, having an
inwardly projecting pin 42, normally engaging with the bent upper end of the tail
of an armature 43, of which there is but one for each spindle, these armatures being
respectively located in the presence of the poles of two magnets 44 44, also secured
to the back of the door B.
A long operating lever 45, adapted to be vertically reciprocated in bearings 46 46,
secured to the back of the said door, is located between the same and the outer plate 9
of the two plates 9 and 10. This lever is provided at its lower end with a large
headed screw 47, forming a connection between the lever 45 and a long horizontal
lifting-lever 48, having its outer end pivoted in a bracket 49, secured to the back of
the door near the outer edge thereof, and having its free and inner end supported
upon an eccentric 50, rigidly secured to a horizontal shaft 51, journalled in the said
door and provided at its outer end with a crank 52, having a handle 53, by means
of which the crank is swung from the vertical to lift the lever 45, through the
medium of the eccentric 50 and the horizontal lifting-lever 48. Small rollers 54 54;
(see Fig. 5) located side by side, and extending inwardly from the lever 45 to which
they are secured, are respectively engaged by the ends of two horizontal winding-
arms 55 55, secured to the forward ends of the arbors to which the inner ends of the
actuating-springs 11 and 30 are secured, whereby the lifting of the said operating-
lever 45 operates to wind the springs, and so furnish power for the actuation of the
locating and signal trains. A lever 56 pivoted to the said operating-lever 45 at a
point near the rollers 54 54 just mentioned, and on the opposite side thereof, is
engaged at one end with the free end of a lever 57; provided at such end with an
anti-friction roller 58, and pivotally secured to the outer face of the plate 9 by means
of a stud 59, the said lever 57 being normally held down by gravity with its free
end 58 engaged with the operating end of the lever 56, the opposite end whereof is
pressed down by a spring 60, mounted in a block 61, attached to the outer face of
the operating-lever 45. When the said operating-lever 45 is lifted by the means
heretofore described, the operating end of the lever 56 lifts the anti-friction-roller 58
of the lever 57 into engagement with the periphery of the heart-shaped cam 23, and
inverts the same with the effect of restoring the signal-indicator I carried by the
sleeve J, which also carries the said cam to its normal position in which it points to
the uppermost or zero compartment in the series of signal-compartments on the
dial C, the said indicator and cam being arranged so that the indicator extends in
exactly the opposite direction from that in which the depression of the cam normally
faces. The said spring 60 is provided for holding the lever 56 up in position for
doing its work, and yet permitting the lever to yield after the cam has been inverted.
so as to avoid any strain upon the shaft G carrying the sleeve J and the cam.
may be here mentioned that the sleeve J is frictionally coupled with the pinion 24 in
order to permit the cam and the indicator I to be restored to their normal positions:
independent of the pinions 24, 25 and 26, which are in positive connection with the
signal-train. The friction established between the said sleeve J and the pinion 24, is
however, sufficient to couple the two parts together for all purposes of driving the
indicator from the train.
It'
A long pin 62, projecting inwardly from the upper end of the operating lever 45,
engages when the lever is lifted, with the outer end of a horizontal catch 63 pivoted
over the magnet 19, and provided upon its lower face with a shouldered finger 64.
the shoulder whereof is normally engaged with the upper end of the armature 18 of
the magnet 19, so that when the magnet is energized and the armature is withdrawn
from under the said shoulder, the catch 63 will drop by gravity and hold the armature
in its attracted position. in which its lower end, forming a train-detent is carried
beyond the range of the stop-tooth 16 of the wheel 17 of the locating-train, which
will run as long as the armature is so held, and there is any power in its actuating
spring 11. When the operating-lever 45 is lifted, its pin 62 lifts the catch 63, and

page_text: permits the spring 22 to pull the armature 18 back to its normal position, and throw
the detent thereof into the path of the stop-tooth 16, so that the lifting of the
operating-lever 45 permits the said spring to lock the locating-train and hold it
against operation after the locking-lever b has been disengaged from the locking-
wheel a.
A bracket 65 secured to the inner face of the operating lever 45, at a point below
the plates 9 and 10, carries a horizontal restoring rod 66, which extends under the
projecting outer ends of the pins 42 42, located in the counter-weights 41 41,
the said pins being arranged to project on opposite sides of thesaid weights. When the
operating-lever 45 is lifted, the said restoring-rod 66 operates through the said outer
ends of the pins 42 42, to lift the counter-weights, whereby the spindles E E to
which they are attached, are turned, with the effect of restoring the drops D D to
their normal positions in which they conceal the large characters 1 and 2 upon the
dial C. and also of restoring the inner ends of the pins 42 to their normal positions,
in which they rest upon the bent upper ends of the armatures 43 43.
It will be understood that under this construction, when either of the magnets 44
are energized,their armatures will be withdrawn from engagement with the inner ends
of the pins 42 42, thereby permitting the counter-weights to fall, and turn the
spindles E E, and so move the drops to disclose the large characters 1 and 2 upon
the face of the dial C, the function of the restoring rod 66 being to reset these parts
in positions of readiness for operation. A bent rod 67 secured to the inner face of
the operating-lever 45 at a point just above the bracket 65, is shaped so that when
the door B of the case A is closed, its end will extend under the long arm of the
locking-lever b. The function of this rod is to lift the said arm of the locking-
lever and so disengage its short arm from the locking-wheel a, which is thus
unlocked, the lever being held in this position by the engagement of the end of its
long arm with the lower end of the armature c of the magnet e. The said locking-
lever bis automatically released for locking the locking-wheel a when the magnet e
is energized, whereby the armature c is attracted thereto and disengaged from the
long end of the locking-lever b, permitting the spring to throw the short and
hooked end of the said lever into engagement with the teeth of the locking-wheel a.
The rod 67 is thus provided for mechanically operating the locking-lever to release
the locking-wheel and restore the lever into a position of readiness to perform its
locking function automatically.
A bracket 68. projecting inwardly from the inner face of the operating lever 45,
and secured to the said lever near the upper end thereof, is adapted to engage when
the door B of the case A is closed, with the horizontal end of a switch restoring
crank 69, journalled in bearing 70 70, secured to the board K and having its vertical
end arranged to play in the opening in the bell-stud p, and so as to engage with
the rear edge of the long lever m of the gang-switch before described. When the
operating-lever 45 is lifted, the door B being closed, the bracket 68 lifts the
horizontal end of the switch-restoring-crank, and throws the vertical end thereof
forward into engagement with the said lever m. which is thus thrown forward,
whereby the gang-switch is thrown back to its normal position, in which all of the
circuit-closers are simultaneously engaged with the several binding-posts L, and
whereby the lower end of the lever mis thrown out into position for the engagement
of its spring with the contact-point s. The gang-switch is held in its closed
position. by means of the tripping-lever 1, which is thereto engaged with the
armature of the magnet . When the said magnet is energized, its armature w
is disengaged from the lower end of the said tripping-levert, which releases the long
lever m of the gang-switch, which then drops forward by the action of gravity, and
simultaneously disengages all of the circuit-closers h from the several binding-
posts L. The said circuit-closers being placed under tension in the normal position
of the gang-switch, aid the force of gravity in throwing the switch forward, which
takes place with sufficient force to cause the long arm in of the lever to throw the
tripping-levert around on its fulcrum so as to strike the bell a blow, and thus

page_text: announce to anyone within hearing of the receiver that it has been set in operation
from some one of the sub-stations with which it is connected.
In connection with the receiver above described, a switch-board is employed,
having as many plug-switches or spring-jacks 71, or equivalent constructions, as
there are sub-stations in the field, each spring-jack being connected with one of tlie
binding-screws g located in the top of the case A of the receiver. This switch-
board is to provide means for cutting the receiver out of the main line and cutting
a telephone or a variable-signal-transmitter into that line. The switch-board may
take a variety of forms, and may either be located in an extension of the case
of the receiver, or it may be an independent construction. For the purposes of
illustration, it is chosen to show a few spring-jacks located in the lower portion of
the door B of the receiver, the connections of one of these jacks being shown in
Fig. 8 of the drawings. It will be understood, however, that the switch-board as
herein shown is not adequate in capacity to the receiver, but it will illustrate the
principle on which this feature of the apparatus is constructed.
The apparatus at the central-station includes, as has been already described, a
telephone having a receiver 72, a transmitter, 73, and a plug 74, the latter being
adapted to be inserted into any of the spring-jacks 71, so as to cut out the receiver,
and cut the telephone into connection with any one of the sub-stations. The
central-station apparatus also includes a variable signal-transmitter, consisting
essentially of a magnet 75, having extension pole-pieces, an armature 76 upon which
the said pole-pieces act directly, an anchor-shaped pallet 77, the shank whereof
connects with one end of the said armature, a star-wheel 78 embraced by the
anchor-shaped pallet, and mounted upon an arbor 79, an indicator 80 secured to
the outer end of the arbor, and a dial 81 over which the indicator sweeps, and
having its face divided into a circular series of compartments, each of which contains a
signal or want. The said arbor 79 also carries a hub 82, provided with an insu-
lating-strip 83, which is set into its surface, the said hub being constantly engaged by
wo trailing spring-fingers 84,the connections whereof will be described hereafter. The
insulating-strip 83 above referred to and the indicator are relatively arranged to each
other so that when the indicator is in its normal or zero position, the insulating strip
will stand under the spring-fingers, the circuit being normally broken through the
transmitter. The said variable signal-transmitter has a rheotome 85, and a plug 86
connected with it, the said plug 86 being designed for insertion into one of the
spring-jacks for the purpose of cutting the receiver out of the line, and for cutting
the variable signal-transmitter into the line and connecting it with any one of the
sub-stations. In operating the variable signal-transmitter, a thumb-nut located at the
outer end of its arbor 79, is grasped, and the indicator 80 turned to a signal displayed
on its dial, the signals whereof correspond to the signals up on the dials of the receivers
located at the sub-stations but arranged in reverse order. After the transmitter has
been so set, the rheotome is operated by its handle to make and break the circuit, so
as to step the indicator of the transmitter back to the normal or zero position, and the
indicator of a receiver at a sub-station forward to the same signal to which the in-
dicator of the transmitter was set at the central-station, as will be hereinafter
described. The rheotome may be of any approved construction. As herein shown.
it has the form of an ordinary district call-box.
The central-station apparatus is also provided with a relay 87, which may be of any
approved construction it is located within one of the lower corners of the case A of
the apparatus, (see Fig. 2) and operates in conjunction with a register 88, which is
shown in Fig. 8 of the drawings.
Having now described the apparatus located at the central station, one of the sub-
stations and all of the apparatus connected therewith will now be explained.
These sub-stations as herein shown, have the form of lamp-posts of special con-
struction, each post consisting of a standard 89, forming its lower section, a box 90
forming its central section, and a top 91 forming its upper section. The upper end
of the top 91 of the post is enlarged to receive a visual-signal formed by a colored
glass-globe 92, which is secured to a globe-carrier 93, attached to the upper end of a

page_text: tube 94, encircling the gas-tube 95, and adapted to be raised and lowered over the
same so as to permit the glass-globe 92 to be lifted to inclose the gas-burner 96, or
retired below the same into the enlarged upper end of the top 91. The said rod 95
extends downward into the box 90, and is provided at its lower end with two
horizontal arms 97 97, to which are attached chains 98 98, running over rollers 99 99,
journalled in the extreme upper end of the box 90, and provided with weights 100
which exert a constant tendency through the chains and the arms 97 97, to elevate or
throw up the glass globe 92 in position to inclose the gas-burner 96. Normally,
however, the globe is retained in its retired position against the tendency of the said
weights to elevate it, by means of a finger 101, having the lower face of its outer
end beveled and forming a part of a collar 102 located at the lower end of the
tube 95, the said finger being normally caught under a corresponding -finger 103
having its upper face heveled, to co-operate with the bevel of the finger 101, and
projecting forward from the inner end of a short-shaft 104 journalled in bearings 105
secured to the back of the box 90. The said shaft 104 is provided with a down-
wardly projecting pin 106 having its lower end notched and beveled for engagement
with a beveled nose formed at the outer end of an armature 107 of the magnet 108.
A spring 109 engaging with the rear face of the said pin 106, is provided for
throwing the same forward into position for engagement with the beveled nose of the
armature, which is itself normally lifted into position for being engaged by the pin.
by a spring 110, (see Fig. 15) attached to the anchor-shaped pallet 141, of a variable-
signal-transmitter, located directly below the magnet 108, the said anchor-shaped
pallet 111 being connected with the armature 107 by means of a bent wire 112,
whereby every energization of the magnet 108 and actuation of the armature 107.
is.communicated to the anchor-shaped pallet which embraces a star-wheel 113.secured
to an arbor 114, journalled in a frame 115, and provided at its outer end with an
indicator 116, arranged to sweep over the face of a dial 119, which is divided into a
circular series of radial compartment's containing a series of signals corresponding to
the signals described upon the dial of the variable-signal-transmitter, located at the
central station, but arranged in reverse order. the said indicator being located
under a glass front 120, mounted in the case 121 of the instrument. When the
magnet 108 is energized, which will be done by closing the circuit at the central-
station. its armature 107 is attracted, releasing the pin 106, and permitting the
shaft 104 to rotate in its bearings under the action of the weights 100. As the
said shaft is rotated, its finger 103 clears the fingers 101 of the collar 102 secured
to the lower end of the tube 94, which is now free to be raised by the weights.
whereby the signal globe 92 is thrown into its elevated position, in which it surrounds
the burner 96. It will thus be seen that the visual signal is automatically dis-
played under the control of the central-station. It is mechanically retired by the
officer at the sub-station by means of a long manual hook 122. extending down into
the box 90 of the lamp-post in position to be readily accessible to the officer when
the door 123 of the said box is open. The upper end of the said hook is attached to
a collar 124. secured to the lower end of the tube 94, and having the arms 97 pro-
jecting from it, while its lower end is attached to a collar 125, adapted to slide up
and down over the upper end of a section of gas-tubing 126. secured within the
box 90, and attached to the gas-tube 95 extending upward to the top of the lamp-
post. and to a gas-tube 127 extending downward through the standard of the post
to the gas-main. The said collar 125 is encircled by a strap 128, to the free end
of which is attached a spring-finger 129, which extends toward the variable signal-
receiver already described, in position to engage with a bent arm 130 projecting
out of an elongated slot 131 formed in the case 121 thereof, and rigidly attached
at its inner end to a wheel 132, mounted upon the back 133 of the said receiver,
and meshing into a pinion 134 mounted on the arbor 114 of the instrument, so
that when the star-wheel 113 thereof is rotated, under the action of the pallet 111.
the wheel 132 will be rotated with the effect of lifting the arm 130 a distance
proportional to the rotation of the arbor 114. When the hook 122 is pulled down
for retiring the signal-globe 92, the said finger 129 engages with the arm 130,

page_text: and rotates the wheel 132 in an opposite direction, this reverse rotation being
communicated through the pinion 134, to the arbor 114, whereby the indicator 116
is restored to its normal position in which it stands against a star located in the
uppermost compartment of the dial 119. A counter-weight 135 secured to the
wheel 132, counter-balances the arm 130. It will thus be seen that the same
manual act that retires the signal-globe 92 restores the variable signal-receiver to
its normal condition of readiness to be operated to indicate a signal communicated
from the central station.
A telephone, consisting of a receiver 136. and a transmitter 137 is also located
within the box 90, for use in conjunction with the variable signal-receiver already
described. The said receiver and telephone are supplemented by means of a variable
signal-transmitter which is provided for use in communicating with the central-
station, when it may not be possible or convenient to use the telephone. This variable
signal-transmitter is provided with a dial 138, divided into a circular series of radial
compartments. containing a series of signals, such as may best meet the requirements
of a code communication. This dial is swept by an indicator 139. secured to the
outer end of an arbor 140, which is also provided at its outer end with a knurled
thumb-nut 141, by means of which it is manually rotated to set the pointer against
any one of the signals upon the dial. The said arbor is mounted in a frame 142, and
carries a star-wheel 143. embraced by an anchor-shaped pallet. 144,the shank whereof
is pivoted in the frame 142 before mentioned. An armature 145 secured at a right
angle to the shank of the pallet, stands in the presence of the poles of a magnet 146,
the connections whereof will be described hereafter.
The spiral-spring 147, connected with the armature 145. is also connected with an
adjusting-screw 148 extending outside of the case 149 of the instrument. A hub 150
also mounted on the arbor 140. is provided with an insulating-strip 151, set down
Blush with its periphery, which is constantly engaged by two spring-fingers 152, 153,
normally engaged with the said strip, whereby the circuit is broken through the
instrument, the indicator 139 whereof normally stands against the star located in the
uppermost compartment of the dial 138. A strap 154 secured to the case 149 of
the instrument, carries at its outer end a circuit-interrupter, consisting. as shown.
of a hasp 155, provided with a hollow boss 156, adapted to fit over the thumb-nut 141
and forming a guard therefor, an operating button 157 and an inwardly projecting
finger 158, which engages, when the hasp is closed, with a contact-spring 159,
inclosed in a chambered-block 160 of insulating material, secured to the case 149 at
a point thereon opposite the strap before mentioned. When the hasp is closed, the
circuit through the magnet 146 is completed, but when the hasp is open, this circuit
is broken. It will be understood from this construction that when the hasp is open.
the transmitter is cut out of the circuit, whereby its indicator may be set against any
of the signals displayed upon its dial. After the instrument has been set as described,
the hasp is closed, and the circuit completed. Except for breaking the circuit before
setting the indicator of this instrument, the circuit would be closed with the first
movement of the indicator, and the receiver located at the central-station would be
actuated in operation before the officer at the sub-station had time to set the indicator
in case he desired to place it against any signal removed more than one point from
its zero position. But by temporarily cutting out the instrument by means of the
hasp, the officer is given all the time that he needs for setting the instrument.
Secured to the back of the door 123 of the box 90 is a citizen's transmitter,
which is set in operation by a key 161 inserted through a key-hole 162 formed in the
said door. This transmitter is enclosed in a case 163, and provided with a magnet 164
an armature 165 therefor, an anchor-shaped pallet 166, theshank whereof is secured
to the said armature, a frame 167 to which the said shank of the pallet is pivoted, a
star-wheel 168 embraced by the said pallet, an arbor 169 carrying the said star-
wheel, and journalled in the frame 167, and a hub 170 mounted on the said arbor and
carrying an insulating strip 171 in its periphery, which is engaged by spring-
fingers 172 and 173, the connections whereof will be hereafter described. The said
hub and fingers constitute the circuit-controller of the instrument.

page_text: The outer end of the said arbor 169 has rigidly secured to it an operating lever 174,
the forward end whereof is furnished with a shoulder 175 having its inner face
inclined or beveled, the opposite end of the said lever 174 being provided with a
beveled insulating-block or surface 176 controlling the contact of the two insulated
spring-fingers 177 178, and with a stop-arm 179 which engages with a stop-pin
located in the frame 167. A key-lever 181 pivotally hung from a stud 182 entering
the back 183 of the instrument, is provided with a spring-arm 184 carrying at
at its lower end a beveled-pin 185 which projects through an opening formed in the
said key-lever 181, in position for engagement with the shoulder 175 before referred
io. The lower end of the said key-lever 181 is cut away to give clearance to the
key, and to form an extension 186 to which is attached a spiral-spring 187, also
attached to the back 183 of the instrument, and exerting a constant tendency to pull
the key-lever toward the key-stud 188. A key-releasing-lever 189 pivoted to the
back 183 of the instrument and extending below the case 163 through a slot in the
lower edge thereof, is provided with a detaining-finger 190, which extends up into
the clearance-space formed by cutting the lower end of the key-lever away, as
described. This lever 189 is provided with a handle 191, which is accessible for
operating the lever only from the interior of the box 90, and when the door thereof
is open, and consequently not to the citizen holding the key by which this trans-
mitter is operated. A spring 192 secured to the back 183 of the instrument, is
combined with the lever 189, so as to normally hold the detaining-finger 190 thereof
in position to detain the bit of the key, the said finger being swung inward toward the
extension 186 to permit the bit of the key to pass the said detaining-finger by means of
the handle 191, and against the tension of the spring 192, which operates to normally
hold the detaining finger in the position in which it is shown by full lines in the
drawing.
A switch secured to one of the side walls of the box 90, at a point between the
variable signal-receiver and transmitter, consists, in part, of two parallel spring-
plates 193 insulated from each other by blocks 194 to which their ends are secured,
the said blocks being in turn secured to an insulating-plate 195 secured to the said
wire of the box 90 as described. The two sections 196 197 of a small split tube are
respectively secured to the inner faces of the spring-plates 193, so that their edges
will come close together without touching. These two tube sections together form
a spring-jack and a holder, and receive the circular plug of a policeman's pocket
number registering box, one of which will be carried by each officer. It is designed
that each officer shall have one of these boxes adapted to send in to the central-
station a number corresponding with his number, every box being internally adapted
to send in a different number. The said plug of the box is composed of two
metallic strips 198, having their outer faces convexed and respectively adapted to be
received within the two tube-sections of the spring-jack of the switch just referred
to, the said strips 198 being insulated each from the other by a rubber strip 199.
The said box has a case 200 having in the center of one of its sides, a depression 201
containing a small crank 202 attached to a winding-arbor 203 journalled in the
frame-plates 204, 205, of the box: the said shaft. has a spring 206 coiled around it,
and carries the first wheel 207 of a train comprising a pinion 208, a wheel 209, a
pinion 210,and an escapement-wheel 211,the teeth' of which are engaged bya pallet 212
The arbor 213 of the wheel 209.projects through the plate 204, and is provided
with a number-wheel 214, the number of teeth in the periphery of which will
determine the record made at the central-station. The said wheel which is in the
circuit of the box when the same is plugged into the switch, engages when it is
rotated, with an insulated spring-finger also in the said circuit, and makes and breaks
the circuit according to the number of teeth on its periphery.
A pin 215 mounted in the number-wheel 214 near the edge thereof, projects
from the opposité faces of the wheel. its lower end being normally entered
into a stop-notch 216, formed in a stop-lever 217. pivoted to the frame-plate 204 of
the instrument. The said lever is provided at its free end with an outwardly
projecting pin 218, which is engaged by the arm 219 of a push-lever 220, mounted

page_text: úpon a stud 221, secured to the said frame-plate 204. The outer end of the said
push-lever projects through an opening in the case of the instrument. When the
lever is pushed in, its arm 219 operates, through the pin 218, to move the stop-
lever 217 so as to remove the stop-notch 216 from the lower end of the pin 215.
whereby the number-wheel is released for rotation by the irain before described. A
stop-pin 222 mounted in the stop-lever 217 is adapted to be engaged by a cam-finger
223 formed at the outer end of a rotatible stop-arm 224, mounted upon the winding-
arbor 203. When the crank 202 is turned for winding the spring 206, the said
rotatible stop-arm 224 is carried away from the stop-pin 221, leaving the stop-lever
free to be thrown out by the action of the push-lever to disengage the stop-notch 216
from the pin 215 carried in the number-wheel. The wheel being released, the train
operates to rotate it, and as the train runs down, the rotatible stop-arm returns to
its normal position, and its cam finger engages with the stop-pin of the stop-lever.
and pulls the same toward the number-wheel so as to lock the pin 215 of the same
into the stop-notch 216. The projecting upper end of the said pin 215 engages with
the cam finger of the rotatible stop-arm, and forms an additional stop for holding
the wheel from rotation against the power of the spring. This policeman's box is
used in conjunction with the variable signal-transmitter in the lamp-post, and with a
small switch located in the receiver situated at the central-station, and shown by
Figure 5 of the drawings, in which the sleeve J of the heart-shaped cam 23 is shown
as provided with a pin 225. located upon the sleeve, so that just before the sleeve
completes a rotation, the pin will operate to lift the spring 226 out of engagement.
with a finger 227, and thus cut the starting-magnet of the receiver out of circuit and
reengage the spring 226 with a finger 228, whereby the relay is cut into circuit, and
hence also the register. By reference to Figure 16 of the drawings, it will be
noticed that the last signal on the dial thereof, is represented by the word "register."
Now whenever the indicator of the said transmitter is set against that signal, the
same signal will be reproduced in the receiver at the central station by carrying
the signal-indicator I of the said receiver way around to the last compartment in the
want series. But this movement of the indicator is accompanied by a corresponding
movement of the heart-shaped-cam and the sleeve, the pin 225 of the sleeve then
operating to cut the starting magnet 19 of the receiver out of the circuit, and cut
the relay into the circuit. When an officer having one of these policeman's boxes.
desires to leave a permanent record at the central-station of a visit made by him to
the lamp-post, he opens the door of the box 90, sets the indicator of the variable-
transmitter therein to the word register." The receiver at the central-station is at
once operated to reproduce this signal thereat and to cut out the starting-magnet 19
and to cut in the relay 87: the officer now plugs his pocket-box into the switch
provided therefor, and operates the push-lever of his box, so that the number-wheel
thereof is released to make and break the circuit, so as to transmit his number to
the relay and register, which makes a permanent record of his visit to the box.
It may be here stated that the magnets of the variable signal-receivers located at
the sub-stations are wound to higher resistance than any other magnets connected
with the apparatus, except the magnet of the variable signal-transmitter located at the
central station, the object being to provide for keeping the circuits closed through all
of the variable signal-receivers located at the sub-stations. without causing the
continuous operation of the receiver at the central-station, the circuits whereof are
normally closed in the gang-switch. By interposing magnets of high resistance in
the lines, as has been described, the current under which the apparatus is operated.
although flowing through the lines, is not strong enough to operate the starting-
magnet of the receiver, which will not be sufficiently energized to attract its magnet
until the high resistance magnets have been cut out of the circuii.
To provide for cutting out the high resistance magnet in each lamp-post, the box
thereof is provided at its upper end with a button 229, arranged to be pushed inward
by the upper edge of the door 123 of the box when the door is closed, so as to make
contact between two springs 230, 231, attached to the box 90, and forming terminals
of the main-lines. Under this arrangement the circuit in the post is closed through

page_text: the high resistance magnet of its variable signal-receiver, so long as the door of the
post remains closed, but the moment the door is opened, the resiliency of the spring 231
will cause the same to spring away from the spring 230, and thus break the
circuit through the said magnet and cut it out. The resistance of this magnet
being removed, the normal battery current of the apparatus will then operate the
starting-magnet of the receiver at the central-station when called upon so to do.
Having now described in detail the various mechanical features of both the
apparatus located at the central and at the sub stations, the wiring of the apparatus
will be set forth.
Each sub-station is connected with the central-station by a special independent
wire 232 only one of which is shown, as that is sufficient to illustrate all of the others.
This wire is led to one of the binding-screws g, (located in the top of the case of the
receiver.) the particular screw to which the wire is led being designated at 233 for
convenience of identification, and for the same reason others of the screws will be
identified in the same way by numbers. From this post the current flows through a
wire 234, down to one of the spring-jacks 71 in the door B of the case, and back from
the said spring-jack, through a wire 235 to another binding-screw 236. These
wires 234 and 235 include any approved device, (not shown) for connecting the wires
in the case, which contains the binding-screws g, with the swinging door B which
contains the spring-jacks. As has been explained, in this connection, the spring-jacks
will probably be grouped by themselves in a switch-board made independently of the
receiver. The wiring in the diagram forming Figure 8 of the drawings respecting
these spring-jacks, will however suffice to show how they are included in the circuit.
From the binding-screw 236 the current flows through a wire 237 M, down to that
particular binding-post L which corresponds to the sub-station to which the line
wire 232 leads the current then flows through the gang-switch down through the
long lever m thereof, thence to the spring attached to the lower end of the said
lever m, thence to the contact-points with which the said spring is normally
engaged, as shown by Figure 6 of the drawings, thence to the bell-stud p thence
through the wire 238 to the starting-magnet, thence through the short wire 239
into the plates 9 and 10 secured to the back of the door B. From the said
plate 9. the current flows through a wire 240 to a flat plate 241 secured to the
back of the door B, thence through the two fingers of a spring 242 attached to
the upper end of the long operating-lever 45, thence to a plate 243 corresponding
to the plate 241 and separated therefrom in the normal or operative condition of
the receiver. The spring-plate 242 bridges the opening between the plates 241
and 243, and keeps the circuit through the receiver closed. When, however, the
lever 45 is lifted for restoring the several parts of the receiver to their normal positions
after they have been operated, the spring-plate 242 slides off from the plates 241
and 243, and thus breaks the circuit through the interval or resetting the receiver.
From the plate 243 the current flows through a wire 244 to a binding-post 245.
thence through a coiled wire 246 to a binding-post 247, thence through a wire 248 to.
a binding-screw 249 located in the top of the case A, thence through a long wire 250
to the battery 251, thence through the battery and through a wire 252 to the ground-
plate 253. The completion of the circuit just described has for its object the energi-
zation of the magnet 19, which when energized, attracts its armature 18, and causes
the finger 20 at the upper end thereof to engage with the contact-finger 21, and
disengage its lower end from the stop-tooth 16 in the wheel 17, whereby the locating-
train of the receiver is allowed to start.
Beginning at the finger 21, the current of the local circuit thus closed flows through
the armature 18 to the plates 9 and 10, thence through the wire 240, the plate 241, the
spring 242, the plate 243. the wire 244. the binding-post 245, the coiled wire 246,
the binding-post 247. the wire 248, the binding-screw 249. the battery-wire 250,
the battery 251, the return battery-wire 254 to the binding-screw 255, thence
through the wire 256.to the binding-post 257, thence through the wire 258 through the
tripping magnet, thence through the wire 259 to the spring 2 thence through the
plate on the under side of the upper end of the rocking-switchy to the spring 3,

page_text: thence through the wire 260 to the binding-post 261, thence through the coiled
wire 262 to the binding-post 263, thence through the wire 264 to the contact-point 20.
The closing of the above described circuit effects the energization of the tripping
magnets whereby the gang-switch is unlocked and allowed to drop away from the
binding-posts L, whereby the circuits through all the posts are broken. The gang-
switch having fallen away from the binding-posts L, the current is forced to follow
the wire N to that one of the terminals which corresponds to the sub-station to
which the line 232 leads, as shown in the diagram, this terminal is located in the outer
series of the three concentric series of terminals in the receiver: from this terminal (
the current flows to the outer circuit-closer T when the same has been brought into
contact with it by the operation of the locating-train which was released for actuation
by the energization of the starting-magnet 190 before referred to, thence through the
arm U of the said circuit-closer. thence through the brush W attached to the said arm,
thence to the outer ring of the three concentric rings Z. thence through the wire 265
to the locking magnet c. thence to the wire 266, to the spring 4. thence through the
plate on the under side of the lower end of the rocking-switchy to the spring 5, thence
through the wire 267 to the binding-screw 268, thence through the coiled wire 269 to
the binding-post 270, thence through the wire 271 to the spring 226, thence to the
spring 227, to the wire 272. thence to the magnet 37, thence through the wire 273 10
the spring 34, thence to the make-and-break wheel 33. thence to the plates 9 and 10,
thence through the wire 240, plate 241, spring 242, plate 243, wire 244, binding-
post 245, coiled wire 246, binding-post 247, wire 248, to the binding-screws 249 and
wire 250 to the battery. The completion of the circuit just above described, effects
the energization of the locking magnet c. whereby the armature thereof is attracted
thereto and disengaged from the lever b, the locking-arm whereof is at once thrown
by the action of the spring into engagement with the locking-wheel a which is
coupled through the yoke 7 of the arm 8 with the spindle G carrying the locating-
indicator F, which is stopped and held against the number on the dial corresponding to
the number of the sub-station on the line 232. The completion of the circuit last
described, also energizes the magnet 37, whereby the armature 38 thereof is attracted,
with the effect of disengaging the lever 39 from the make-and-break-wheel 33,
which is then actuated under the influence of the spring 30 of the signal-train in
making and breaking the line circuit, whereby the magnet 146 of the variable-
signal-transmitter located at the sub-station to which the line 232 leads, for every
interruption of the circuit by means of the said make-and-break-wheel, attracts its
armature 145 which operates its anchor-shaped-pallet 144 in the star-wheel 143 which
turns the arbor 140, whereby the insulating-strip 151 of the hub 150 mounted on the
said arbor, is brought under the trailing-spring 152 so as to break the line-circuit with
the indicator of the instrument in its normal position to which it is thus restored step
by step from the position to which it was set prior to any action of the receiver at the
central-station.
For every interruption of the line circuit, the magnet 37 is demagnetized, and
when the circuit is finally broken in the variable-signal transmitter located at the
sub-station, the magnet 37 is demagnetized, allowing the lower end of the lever 39
to engage with the make-and-break-wheel 33 which has before been prevented.
during the interruptions of the line-circuit, by the reclosing of the circuit and the
energization of the magnet 37 before the lower end of the armature 39 could enter
the depressions between the cogs of the wheel, this action being attained by a
proper adjustment of the spring 34 with--relation to the lever 39. When the
lever 39 eniers one of the depressions in the make-and-break-wheel, the same is
stopped. and the signal-train arrested with the indicator standing opposite the
signal on the dial C corresponding to the signal to which the indicator of the
variable signal-transmitter at the sub-station was set when the circuit through
the apparatus was first closed, for the receiver is started in operation only by
closing the circuit through from one of the sub-stations, and it will be understood
that all of the operations referred to have been preceded by the closing of the
circuit at one of the sub-stations.

page_text: In case the terminal O of the sub-station calling is located in the middle series of
terminals in the receiver, the circuit will then be through the middle ring 2, wire 274,
binding-post 275, coiled wire 276, binding-post 277, wire 278, the left-hand drop
magnet 44, wire 279, binding-post 280 coiled wire 281, binding-post 282. wire 283.
locking-magnet e, and thence, as before described, to the battery.
In case the terminal O of the sub-station calling is located in the inner series of the
terminals O, the circuit will be through the inner ring Z, wire 284, pust 285, coiled.
wire 286, post 287, wire 288, the right-hand drop-inagnet 44, wire 279, binding-
post 280. coiled wire 281, binding-post 282, wire 283. locking-magnete, and thence to
the battery as before described: The energization of either of the drop magnets 44
will operate to release one of the counter-weights 41, according to the magnet through
flaps or covers D and
one
disclose
which the circuit is closed, and so release one of the
of the large character's upon the dial, the character disclosed being read in connection
with the outer series of numbers in the dial in determining the number of the sub-
station calling.
In case the variable signal-transmitter located at the sub-station calling has its
indicator set to the word "Register" upon its dial, which is the last call or want of
the series of calls or wants thereupon, the receiver located at the central-station will,
just before it is stopped, operate through the pin 235 carried by the sleeve of the
heart-shaped cam 23, lift the spring 226 away from engagement with the spring 227.
and into engagement with the spring 228. This action cuis out the magnet 37 of the
receiver from the main line, and the circuit will now be from the sub-station through
to the spring 226, as before described, then through the spring 228, wire 289 to the
relay 87, thence through the wire 290 to the binding-screw 291. wire 292 to the
battery 251 and to the ground-plate 253.
In the local circuit of the relay is the register 88 and battery 293. Now any
closing at the sub-station of the main-circuit, will be reproduced in the register, which
will make a permanent record of it, the closing of the circuit at the sub-station under
these conditions being effected by means of the policeman's box which has been
heretofore described at length.
Having thus described the circuits in the receiver, and the effect upon it of closing
and interrupting them, the circuits in one of the sub-stations will now be set forth by
reference to the diagram shown by Fig. 27 of the drawings.
In the normal condition of the apparatus in the lamp-post, the circuit will be from
the ground-wire 294 to the binding-post 295, through wire 296, spring 178, spring 177,
wire 297. binding-post 298, wire 299, door-spring 230, door-spring 231, wire 300.
agnet 108, line 301, binding-post 302, and the main-line 232. This describes the
path of the current should a call be sent from the central-station to this particular
sub-station.
Should a call be sent from the central station to the sub-station therein following
the path described, the magnei 108 will be energized with the effect of releasing the
visual signal as before described.
In case an ollicer in the field desires to communicate with the central-station. he
opens the door of the lamp-post, and thereby breaks the contact between the door
springs 230, 231, which cuts out the magnet 108. It will be understood that directly
upon the sending of a call from the central-station to any one of the sub-stations, the
operator at the central-station will remove from the switch-board thereat the particular
plug that was required to connect the sub-station to be called with the central-station.
whereby the high resistance magnet of the variable signal-transmitter located at
the central-station is cut out of the line. leaving the line connected through the
receiver at the central-station, and free to be operated from any of the sub-stations.
The officer now sets the indicator of the variable signal-transmitter of the sub-
station to the signal which he desires to have reproduced at the central-station. The
circuit closed by setting the variable signal-transmitter as described, will be from the
ground-wire 294. to binding-post 295, wire 303. springs 152 153 of the variable
signal-transmitter, wire 304, magnet 146, wire 305, binding-post 306, wire 307 to

page_text: the spring 308 of the telephone-hook, the telephone-hook 309, wire 310, hinding-
post 302 and main line wire 232. The closing of this circuit last described starts the
receiver at the central station in locating the sub-station, and reproducing the signal
as before described.
In case the officer desires to communicate telephonically with the central-station.
he sets the variable signal-transmitter to the word "Telephone" on the dial thereof,
whereby the receiver at the central-station is caused to locate the sub station. and
indicate thereat that the officer calling desires to telephone to it. The officer at the
central-station then inserts. the plug 74 of the telephone at the central station into
that spring-jack in the switch-board at the central-station which corresponds to the
sub-station calling. The officer at the sub-station nowremoves the handle-telephone136
from the hook 309 which will be lifted into engagement with the spring 311, supporting
connection between it and the spring 308. The circuit will now be from the ground-
wire 294 to binding-post 295 through wire 317 to binding-post 316, through flexible
cord 315 to the handle-telephone and back through the other conductor of the cord 315
to the binding-post 314, thence through the secondary coil, (not shown.) in the
transmitter, to binding-post 313, thence through wire 312 to spring 311, telephone-
hook 309, wire 310, binding-post 302 to the main line 232. The springs 318 319
are connected by the telephone-hook 309 when the handle telephone 136 is disengaged
therefrom for cutting in the local battery 320, which energizes the induction coil, not
shown, of the transmitter 73.
In case a citizen desires to send a call into the central-station, he inserts a key 161
which is charged to him, into the key-hole 162 formed in the door 123 of the box 90
of the lamp-post. The turning of the key effects the operation of the citizens box,
as before described in moving the star-wheel thereof one point, so as to close the
circuit through the box, and in opening the normal circuit through the sub-station by
means of springs 177 178 as before described.
The closing of the circuit in the citizen's box as above described, will establish the
path of the current beginning with the ground-wire 294 through to the binding-
post 295, the wire 320, the trailing-spring 172, the trailing-spring 173, the wire 321,
the magnet. 164, the wire 322 the binding-post 306, wire 307, spring 308, telephone-
hook 309, wire 310, binding-post 302 to the main-line 232.
In case an officer desires to leave a permanent record at the central-station of
his visit to the box and his individual number, he opens the door of the lamp-post.
and sets the variable signal-transmitter thereof to the word "Register" as before
described, whereby he causes the actuation of the receiver at the central station to
cut in the relay and register thereat. He then plugs his portable policeman's box
into the switch provided therefor in the lamp-post. The path of the current now
established is from the ground wire 294 to the binding-post 295. thence through
the wire 323, the left-hand spring-plate 193, the tube-section 196 attached thereto,
through the call-box, thence to the corresponding tube-section 196 and right-hand-
spring 193, through the wire 324, binding-post 306, wire 307. spring 308, telephone-
hook 309, wire 310, binding-post 302, and main line wire 232.
Having now described the several circuits of the central-station and sub-station
apparatus. the use of the apparatus will be briefly set forth independent of any special
reference to the circuits.
Supposing that at the central-office it is desired to call up any officer in the
field, the officer in the central-office inserts the plug of the variable-transmitter
therein into the spring-jack connected with the sub-station located in the beat of the
officer whom he desires to call. Having done this, he turns the indicator of the said
transmitter against the signal or want which he desires to place before the. said
officer in the field. and then pulls down. the crank of the call-box whereby the
circuit leading to the sub-station is interrupted with the effect of operating the
variable signal-receiver at that station and reproducing the want or call to which
he has set the transmitter in the office, and throwing up the visual-signal which
is released by the first magnetization of the magnet of the receiver in the

page_text: |sub-station. The officer in the beat being-now attracted to the sub-station or lamp-
post by the exhibition of the visual-signal comes up to the lamp-post and opens the
door thereof, and reads upon the dial of the receiver the message sent to him from
the central station. His further action will depend upon the character of that message.
Before leaving he retires the visual-signal and in so doing restores the variable-signal:
receiver to its normal position.
Should it be necessary for the officer on this beat to communicate with the central-
station, he opens the door of the lamp-post, and sets the indicator of the variable-
signal-transmitter therein to the want or signal which he desires to reproduce in the
central-station. If he desires to communicate with the officer of the central-station
telephonically, he sets the indicator of the transmitter to the word "Telephone,"
which is reproduced by the receiver in the central-station together with the number
of the station which he is calling from. The officer at the central-station then
places his telephone in the line, and the two officers telephone to each other.
Should it be impossible or undesirable to use the telephones for communication
between the central-station and the sub-station, or should the sub-station not be
provided with a telephone, the variable-signal-transmitters respectively located at the
central-station and at the sub-station may be used as a means of communication. In
this case the door of the lamp-post must be closed immediately after the officer at the
sub station has sent in the signal to the central-station, in order that the receiver at
the sub-station may be cut into the circuit so as to receive the message from the
central-station. Instead of closing the door of the lamp-post, the officer may
hold the springs closed manually. In this case also the officer at the central-station
must remove the plug of the transmitter thereat from the switch-board every time
he asks a question of the officer at the sub-station, so that the receiver at the central-
station will be in readiness to receive the message sent by the officer at the sub-station.
After the receiver at the central-station has been operated in the receipt of a
message, the officer manipulates the crank thereof so as to raise the operating-lever 45
which with its manifold connections restores all the parts of the said receiver to
their normal positions of readiness to be operated again from any one of the sub
stations.
The use of the apparatus by a citizen sending in a call, and also by an officer
in the field to obtain a permanent record of any call that he may make to a sub
station, has been so fully described that it does not need further exemplification.
. Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondeni I. declare that, what, I claim is-
First. The combination with a series of sub-stations each containing a visual-signal
and a variable-signal-transmitter, electric connections between the sub-stations and a
central-station common to them all, whereby the signals may be displayed under the
control of the central-station, and a receiver located at the central-station, and co-
operating with the transmitter at the sub-station-to-locate the same and reproduce
signals therefrom. substantially as described.
Second. The combination with a series of-sub-stations each containing a visual-
signal, electric connections between the sub-stations and a central-station, whereby the
signals may be displayed under the control of the central-station, a variable-signal-
transmitter located at the central-station, and a variable signal-receiver located
at each sub-station, whereby messages may be sent back and forth between the
central-station and each sub-station, substantially as described.
Third. The combination with a series of sub-stations each containing a visual-
signal, electric connection between the sub-stations and a central station, whereby the
signals may be displayed under the control of the central-station, a variable signal-
transmiiter located at the-sub-stations, a receiver located at the central-station and
co-operating with the transmitter at the sub-station to locate the same and reproduce
signals thereby, and a variable signal receiver also located at each sub-station and
operated under the control of the central-station, substantially as described.

page_text: Fourth. The combination with an electric circuit, of an electro-magnet included
therein at a sub-station, an automatic rheotome for completing and interrupting
connections of the said circuit, located at a main station, and a circuit-interrupting
device at the sub station, normally breaking the circuit and closing the same when
set and brought into action by the said magnet, and serving to interrupt the
connections of said circuit when a determinate number of interruptions and
completions of the circuit have been occasioned by the said rheotome, substantially
as described.
Fifth. The combination with a number of variable signal transmitters, of a receiver
having a series of terminals respectively connected with such transmitters, and
arranged in isolated blocks, a circuit-closer for the terminals of each block, an
indicator for locating the transmitters co-operating with the circuit-closers, and a
signal-indicator, substantially as described.
Sixth. The combination with a series of variable signal-transmitters, of a receiver
having a series of terminals respectively connected with the said transmitters and
arranged in isolated blocks located in the branches of the main line which extends
between the transmitters and the said receiver, a circuit-closer for the terminals of
each block, a locating-indicator co-operating with the circuit-closers and locating
the transmitters, and a signal-indicator, substantially as described.
Seventh. The combination with a series of variable signal-transmitters, of a receiver
having a series of terminals respectively connected with such transmitters and
arranged in isolated blocks located in branches of the main line which extends between
the transmitters and receiver, a circuit-closer for the terminals of each block, a
numbered dial displaying characters representing the respective blocks, and indicators
controlled by the branch lines for specifying said characters, substantially as
described.
Eighth. The combination with a series of variable signal-transmitters, of a receiver
having a series of terminals respectively connected with such transmitters and
arranged in isolated blocks located in branches of the main line which extends
between the transmitters and the said receiver, a circuit-closer for each block, a
numbered dial displaying characters indicating the respective blocks, and drops
normally concealing such characters and revealing them when thrown down by the
branch-circuits, substantially as described.
Ninth. The combination with a series of variable signal-transmitters, of a receiver
having a circular series of terminals respectively connected with the said transmitters.
à contact-ring concentric with said series of terminals, and a rotary circuit-closer and
a brush respectively engaging with the terminals and ring, the latter being located
in a line which extends between the transmitters and the said receiver, substantially
as described.
Tenth. The combination with a series of variable signal-transmitters. of a receiver
having two or more circular series of transmitter-terminals, an insulated circuit.-
closer and a concentric contact-ring for each series, the rings being included in the
main line which extends between the receiver and the transmitters, substantially as
described.
Eleventh. The combination with a series of variable signal-transmitters of a
receiver having two or more circular series of transmitter-terminals, a concentric
contact-ring, and a circuit-closer for each series, a dial, and indicators for respectively
specifying any transmitter, and the series to which it belongs. substantially as
described.
Twelfth. The combination with a series of variable signal-transmitters, of a circular
series of terminals respectively connected with the said transmitters, a dial provided
with a number for each transmitter. means for specifying the signals or wants, a
pointer to sweep the dial, a rotating shaft carrying said pointer, a rotatible circuit-
closer to sweep the said circular series of terminals, a locking-wheel connected with
the said circuit-closer and rotating therewith, a shock for the said wheel, a make-and-
break wheel, a lock therefor, and a magnet located in the main-circuit which extends
between the transmitters and the said terininals, the said locks being controlled

page_text: in locking the locking-wheel, and unlocking the make-and-break wheel by the
said magnet, and the circuit made and broken by the make-and-break wheel
operating to restore the transmitters to their normal positions, substantially as
described.
Thirteenth. The combination with a series of variable signal-transmitters, of a
receiver having a terminal for each transmitter. the said terminals being grouped in
blocks respectively located in branches of the main-line, and the said receiver being
also provided with block-indicators located in the said branches, and with a hand-
lever for restoring the said indicators to their normal positions, substantially as
described.
Fourteenth. An electric receiver having a locating-train and a signal-train, a
locating-indicator connected with one train and a signal-indicator connected with the
other train, a manual operating lever, and connections between the trains and the
lever, whereby both trains are wound up when the lever is operated, substantially as
described.
Fifteenth. In an electric receiver, the combination with locating-train and a
signal-train, of a locating-indicator and a signal-indicator respectively operated
by the said trains. two winding-arms respectively secured to the main-arbors
of the trains, and a manual operating-lever extending between the two trains
and connected with each of said arms which extend inwardly toward it, whereby,
both trains are wound up when the lever is operated, substantially as described.
Sixteenth. An electric-indicator having a receiver provided with a series of
terminals, a rotatible circuit-closer, and mechanism constructed independent of the
terminals and closer and including trains and magnets and train-controllingmechanism,
and mounted to be moved up to and away from the said terminals and closer.
and coupling-mechanism to couple one of said trains with the circuit-closer when
said independent mechanism is moved toward the same, and uncoupling the same
when the said mechanism is moved away from the circuit-closer, substantially as
described.
Seventeenth. An electric receiver having two actuating trains, winding-arms
secured to the main-arbors thereof, and a manual operating lever flexibly connected
with said arms, whereby the trains are wound when the lever is manually operated.
substantially as described.
Eighteenth. In an electric indicator, the combination with a series of variable
signal-transmitters each havinga circuit-controller andan electro-magnet for operating
the same, of a receiver having an indicator to reproduce the transmitter-signals, a
mechanically actuated train to drive the said indicator, an electric circuit between
the transmitters and receiver controlling the starting of the said train, and a rheotome
driven by the train and interrupting the circuit which brings the said circuit-controller
into action, whereby the indicator is operated by mechanical power and only controlled
by the current, substantially as described.
Ninteenth. In an electric-indicator, the combination with a series of variable
signal-transmitters each having a circuit-controller and an electro-magnet for
operating the same, of a corresponding series of terminals. a rotatible circuit-closer to
engage with such terminals, an indicator normally coupled with the circuit-closer for
locating the transmitter; and a locking-wheel for locking the said circuit-closer in any
one of its positions, said circuit-closer and wheel being rigidly secured to the said
shaft: whereby the integrity of their relations is always preserved and reliability of
indication secured, substantially as described.
Twentieth. In an electric-indicator. the combination with a series of variable
signal-transmitters.of a correspondingseries ofterminals located at a receiving-station,
a movable circuit-closer to engage with said terminals, a locating indicator. a
signal-indicator. two independent mechanically actuated trains for operating said
indicators, an electric-circuit between the transmitters and the receiving-station, and
means located in said circuit for starting the trains, substantially as described.
Twenty-first. In an electric indicator. the combination with a series of variable
signal-transmitters of a correspondingseries of terminals locatedat a receiving-station,

page_text: a signal-indicator at said station, a heart-shaped cam coupled with the indicator, and
an operating lever adapted to engage with the periphery of said cam to rotate it to
restore the indicator to its zero position, substantially as described.
Twenty-second. In an electric-indicator, the combination with a series of variable
signal-transmitters, of a correspondingseries of terminals located at a receivingstation,
a movable circuit-closer engaged with said terminals, an indicator normally coupled
with the circuit-closer for locating the transmitters, and a locking-wheel for locking
the said indicator in any of its positions.the circuit-closer and wheel being permanently
connected together so that the integrity of their relations is always preserved and
reliability of communication secured, substantially as described.
Twenty-third. In an electric-indicator, the combination with a series of variable
signal transmitters eachhavinga circuit-controller and an electro-magnet for operating.
the same, of a receiver having an indicator to reproduce the signals to which the
transmitter may be set, a mechanically driven train to actuate the said indicator, an
electric circuit between the transmitters and the receiver, a make-and-break-wheel
driven by the said train and interrupting the said circuit, and a detent normally
locking the train and operated under the control of the said circuit, to unlock the
said wheel and train, substantially as described.
Twenty-fourth. In an electric-indicator, the combination with a variable signal-
transmitter having a star-wheel coupled with an indicator, a circuit-controller, and an
electro-magnet for operating the same; of a receiver having a signal indicator to
reproduce the signals of the transmitter, a train to actuate the signal-indicator of the
receiver in harmony with the indicator of the transmitter, an electric-circuit between
the transmitter and receiver, a make-and-break wheel actuated by the said train and
interrupting the said circuit, a magnet controlled by the said circuit, and an armature
operated by the said magnet to unlock the make-and-break wheel which calls in the
circuit-controller to stop the train, substantially as described.
Twenty-fifth. An electric indicator having a receiver provided with a series of
terminals a rotatible circuit-closer for engagement with said terminals, a train mounted
upon a "swinging door or frame. coupling mechanism to couple the train with the
circuit-closer when the door or frame is closed and uncoupling them when the door is
open, substantially as described.
Twenty-sixth. An electric-indicator having a receiver provided with a series of
terminals, and with a rotatible circuit-closer carrying a coupling-pin to sweep over
them; and a train mounted upon a swinging door or frame, and provided with a yoke
coupling with the said circuit-closer when the frame or door is closed, substantially as
described.
Twenty-seventh. An electric-indicator having a receiver provided with a series of
terminals, a rotatible circuit-closer, a locking-wheel permanently connected therewith
and carrying a coupling-pin, and mechanism adapted to be moved away from said
terminal closer and wheel to give access to them,and including trains, train-controlling
mechanism, and a coupling arm for coupling with the said pin, substantially as
described.
Twenty-eighth. In an electric indicator, the combination with a series of variable
signal-transmitters.of a receiver having a terminal for each transmitter,a circuit-closer
16 sweep the said terminals, an actuating-train for actuating the said circuit-closer.
having an escapement to control its running: a deient to hold the train locked after
it has been wound-up. and 'a magnei controlled by the circuit between the transmitters
and receiver and adapted to operate the said detent to release the said train and
permit it to operate the circuit closer, substantially as described.
Twenty-ninth. In an electric-indicator, the combination with an actuating-train; an
armature forming a detent to hold the train when it is wound up, a magnet to operate
the said armature, a catch to engage the armature to hold the detent thereof away from
the train after the magnet has been demagnetized, and an operating lever adapted to
wind up the train and to disengage the catch from said armature, substantially as
described.
Thirtieth. An électric-receiver having a circuit-closer, a locking-wheel connected

page_text: therewith, a horizontal locking-lever for engagement with said wheel, an armature for
releasing the lever, a spring for engaging the locking-lever with the wheel, and a
manual operating-lever adapted to engage with the locking-lever to disengage it from
the locking-wheel and re-engage it with the said armature, substantially as described.
Thirty-first. The combination with a variable-signal-transmitter having an indicator
an electro-magnet for returning the same to its normal position, and a circuit-.
controller of a signal-indicator located at a receiving-station for reproducing any
signal to which the transmitter may be set, an electro-magnet also located at the
receiving-station, an electric-circuit controlling the said magnet, a detent constantly
impelled to stop the sigual-indicator and thereto released by the said circuit as soon as
the signal has been reproduced, and an automatic rheotome located in the said circuit
and interrupting the same, whereby the magnet of the transmitter operates to return
the indicator thereof to its position of rest and break the circuit, substantially as
described.
Thirty-second. The combination with a
signal-transmitter having an
indicator, a circuit-controller and an electro-magnet to operate the same; of a locating-
indicator situated at a receiving-station to locate the transmitter, a signal-indicator
also located at the receiving-station and adapted to reproduce any signal to which the
transmitter may be set, an electro-magnet located at the receiving-station, an
electric-circuit including the said magnets, a detent constantly impelled to stop the
signal-indicator and thereto release by the said circuit when the signal has been
reproduced, an automatic rheotome mechanically connected, with the signal-indicator
and located in the said circuit, and interrupting the same, whereby the magnet of the
transmitter operates to return the indicator thereof to its position of rest and to break
the circuit, substantially as described.
variable
Thirty-third. The combination with a series of variable-signal-transmitters respec-
tively located at sub or sending-stations, of a variable-signal-transmitter located at a
receiving-station and adapted to be connected with any one of a series of terminals
brought into the said station from the respective transmitters, and a rheotome or
circuit interrupier connectedwith the transmitter at the central station for interrupting
the circuit established between the receiver at the central-station and the respective
transmitters, substantially as described.
Thirty-fourth. The combination, with a series of variable, signal-transmitters respec-
tively located at sub-stations, of a receiver located at a central-station and adapted to
automatically locate the transmitters and reproduce the signals to which they may be
sei, and containing terminalsofthe respective transmitters; a switch-board located at
the central-station and having a terminal of each of the transmitters, and a variable
signal-transmitter located at the sending-station and adapted to be connected through
the switch-board with any of the transmitters located at the sub-stations, substantially
as described.
Thirty-fifth. The combination with a series of variable signal-transmitters, of a
receiver adapted to locate the said transmitters and reproduce their signals, and
containing a terminal of each transmitter and a gang-switch normally engaged with
all of the, said, terminals, and adapted to be simultaneously disengaged from all of
them, substantially as described.
Thirty-sixth. An electric-receiver having a gang-switch journalled at its lower end
so as to be swung into or out of contact with a series of terminals, substantially as
described..
. Thirty-seventh. A receiver having a gang-switch journalled at its lower and so as
to be swung into or out of contact with a series of terminals, and provided with a
long depending lever by means of which it is held in its normal position and
restored thereto after it has been dropped away from said terminals, substantially
as described.
Thirty-eighth. An electric receiver having a gang-switch journalled at its lower end.
and adapted to be simultaneously engaged, with, or disengaged from, a scries of
terminals, and a rocking-switch connected with the said gang-switch so as to be
operated therewith, substantially as described.

page_text: •
Thirty-ninth. The combination with a series of variable-signal-transmitters, of a
receiver adapted to locate them, to reproduce their signal to be controlled in its
action by thean, and containing a switch which it brings into action when operated by
the transmitters in a predetermined manner, a relay and register connected with the
said switch, which, when operated, cuts in the relay, whereby an electric connection
.is-established between the station at which the transmitter calling is located and the
register and a call-box adapted to be cut into the circuit at the sending-station, so
that a permanent record of the interruptions of the circuit made by it will be preserved
by the register, substantially as described.
Fortieth. In a citizen's transmitter, the combination with a circuit-controller, of an
operating-lever connected: therewith, and provided with a shoulder having its inner
edge inclined or beveled, a key-lever provided with a spring-arm carrying a beveled-
pin which jumps from the outer to the beveled edge of the said shoulder when the
key-lever is moved by a key, a spring for restoring the key-lever to its normal
position, whereby the said pin and beveled shoulder co-operate to shift the operating-
lever and hence the circuit-controller, substantially as described.
Forty-first. In a citizen's transmitter, the combination with a circuit-controller, of
an operating-lever connected therewith and provided with a shoulder having its inner
edge inclined or beveled, a key-leyer provided with a spring-arm carrying a beveled-
pin which jumps from the outer to the beveled edge of the said shoulder when the
key-lever is moved by a key, a spring for restoring the key-lever to its normal
position, whereby the said pin and beveled shoulder co-operate to shift the operating
lever and hence the circuit-controller, and a key-detent for detaining the key after it
has operated, the transmitter, as described.
Forty-second. In a citizen's transmitter, the combination with a circuit-controller.
of an operating-lever connected therewith and provided with a shoulder having its
inner edge inclined or beveled, a key-lever provided with a spring-arm carrying a
beveled-pin which jumps from the outer to the beveled edge of the said shoulder
when the key-lever is moved by a key, a spring for restoring the key-lever to its
normal position, whereby the said pin and beveled shoulder co-operate to shift the
operating-lever and hence the circuit-controller, and means for cutting out a high
resistance magnet by the described movement of the operating-lever, substantially as
described.
Forty-third. In a citizen's transmitter, the combination with a circuit-controller, an
operating lever connected with the circuit-controller and provided with a shoulder
having its inner edge beveled, a key-lever provided with a spring-arm carrying a
beveled-pin arranged to normally engage with the outer edge of the said shoulder.and
to be jumped from the said edge of the shoulder to the beveled edge thereof when the
key-lever is moved by the key, a spring for restoring the key-lever to its normal
position, whereby the beveled-pin and the beveled edge of the shoulder-co-operate to
shift the operating-lever and hence the circuit-controller, a key detent for detaining
the key after it has operated the transmitter, arranged to be inaccessible to the holder
of the key and means for cutting out the high resistance magnet by the shifting of
the operating-lever, as described.
Forty-fourth. In an electric apparatus for police-service, the combination with a
policeman's registering-box having a cylindrical-plug and circuit interrupting
mechanism, of a switch located at a sub-station and adapted to receive the said
plug, and support the box; and a relay and register located at a central station
and operated by the interruptions of the circuit made by the box when plugged into
the switch. the register preserving a permanent record of the interruptions made by
the box, substantially as described.
Forty-fifth. In an electric apparatus for police service, a sub-station apparatus
comprising a normally retired visual-signal. a variable signal-receiver including a
magnet and restoring mechanism, connection between the visual-signal and the said
magnet, whereby the latter when energized operates to release the signal and permit
it to be displayed and means for retiring the signal and locking it, and operating.
as an incident of their use, to act upon the restoring mechanism of the variable

page_text: signal-receiver to restore the indicator thereof to its normal position, substantially as
described.
Forty-sixth. In an electric apparatus for police service, the combination with a
normally retired visual-signal consisting, in part, of a colored glass globe and a long
tube of a bevel-finger located at the lower end of the said tube, a rocking-shaft
provided with a beveled-finger and with a depending-pin, a variable signal receiver
including a magnet, the armature whereof is normally engaged by the said depending
pin, a restoring-arm projecting outward from the said receiver, and a long lever
attached to the lower end of said tube and provided with a transverse finger which
engages with the restoring arm of the receiver and operates the said arm to restore
the receiver to its normal condition, substantially as described.
Forty-seventh. In an electric apparatus for police service, the combination, at a
sub-station, with a normally retired visual-signal, of a variable signal-receiver, and a
variable signal-transmitter, substantially as described..
Forty-eighth. In an electric apparatus for police service. the combination, at a
sub-station, with a normally retired visual-signal, of a variable signal-receiver and
a variable signal-transmitter, and a citizens transmitter adapted to be operated by
a key, and inaccessible in the holder of the key, except by means of the same, sub-
stantially as described.
Forty-ninth. In an electric apparatus for police service, the combination with a
series of variable signal-transmitters located at sub-stations, of a receiver located
at a central-station, having the said transmitters independently connected with it,
and adapted to locate the said transmitters to reproduce the signals to which they
may be set, and to be controlled in operation by them a switch located at cach
sub-station and provided with two insulated half tube-sections, and a policeman's
portable registering-box provided with a cylindrical plug adapted to be received
by the switch which then supports the box, and a relay and register located at
the central-station and cut into the main circuit by the action of the receiver under
the control of any of the transmitters located at the sub-stations, substantially as
described.
1
Fiftieth. In an electric apparatus for police service, the combination with a series
of variable signal-receivers respectively located at sub-stations, and each including
a high resistance magnet, of a receiver located at a central-station, and having the
respective variable signal-receivers independently connected with it.a variable signal-
transmitter located at the central-station and provided with a high resistance magnet
corresponding to the magnets of the receivers located at the sub-stations, a series of
variable signal-transmitters respectively located at the sending-stations, and means for
cutting out the said high resistance magnets for the operation of the receiver at the
central-station and the operation of the transmitters at the sub-stations, substantially
as described.
Fifty-first. In a policeman's pocket number-registering box, the combination with a
train, of a number-wheel actuated thereby, a stop-lever adapted to engage with a pin
carried by the number-wheel to stop the same. a push-lever co-operating with the
stop-lever to release the number-wheel, and a stop-arm actuated by the train to
engage the stop-lever with the pin on the number-wheel, a cylindrical plug consisting
of two insulated contact-plates projecting from the case of the box, and a spring-finger
adapted to engage with the periphery of the number-wheel and located in the circuit
of the box. the configuration or toothing of the wheel determining the interruptions of
the circuit through the box, substantially as described.
Dated this 96th day of November 1889.
HASELTINE. LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.