IMPROVEMENTS IN THE ARRANGEMENT OF AND IN THE MECHANISM FOR TELEPHONE ALARMS OR INDIVIDUAL CALLS
Year: 1882

page_text: LETTERS PATENT to William Morgan Brown Patent Agent of 38 Southampton
Buildings London, for an Invention of "IMPROVEMENTS IN THE ARRANGEMENT
OF AND IN THE MECHANISM FOR TELEPHONE ALARMS OR INDIVIDUAL CALLS."-
A communication from abroad by James Frederick Kettell, of Worcester,
Massachusetts, United States of America.
PROVISIONAL SPECIFICATION left by the said William Morgan-Brown at
the Office of the Commissioners of Patents on the 25th April 1882.
68
WILLIAM MORGAN BROWN Patent Agent of 38 Southampton Buildings, London
IMPROVEMENTS IN THE ARRANGEMENT OF AND IN THE MECHANISM FOR TELEPHONE
ALARMS OR INDIVIDUAL CALLS." [A communication from abroad by James
Frederick Kettell, of Worcester, Massachusetts, United States of America.]
"
This Invention relates to that class of telephone alarms commonly known as
'individual calls," the object of which is to enable the central or main office of a
telephone system to ring the alarn of one subscriber or station without ringing
those of the others on the same circuit.
The invention consists in the combination of the following elements, vis:—a
clock mechanism, an electro magnet, and its armature in the main line circuit for
controlling the said clock mechanism, a branch or grounding circuit and circuit
closer therein controlled by the said clock mechanism an aların mechanism consisting
of a mechanically actuated train of gears, and the controlling magnet therefor
located in the said branch or grounding circuit whereby the operation of the
said alarm mechanism is governed by the circuit closer controlled by the clock
mechanism.
Also in a series of apparatus in a single circuit consisting of a clock mechanism,
an electro magnet and its armature in the said circuit for controlling the said
clock mechanism, a branch or grounding circuit and circuit closer therein
controlled by the said clock mechanism, an alarm mechanism consisting of a
mechanically actuated train of gears and the electro magnet and armature in the
said branch or grounding circuit for controlling the said alarm mechanism, the

page_text: circuit closers in the said branch circuit controlled by the different clock mechanisms
being arranged to operate at different periods in the synchronous movement of their
controlling clock mechanisms, when all started in unison by a common impulse
in their controlling electro magnets.
Also in a uniformly moving train or clock mechanism at the central station and
circuit closer operated thereby one electrode of the said closer being moved by the
said train from a definite starting point and the other being adjustable by the
operator to any position in the path of the said moving electrode, a stopping device
for the said clock work and circuit closer operated by it in the action of releasing
the said clock nechanism, whereby an impulse is sent over the line at the moment
the clock work is started and a second impulse at a definite moment in its movement
thereafter, in combination with a series of stations each containing a clock work
controlled by an electro magnet in circuit with the said circuit closer, a circuit closer
operated by the said clock work at a different moment at each station, and an aların
controlled by the said circuit closer whereby the first operation of the eaid central
station instrument affects the electro magnets by which the station clock works are
all started in unison with the said central clock work, and the second closure of the
circuit at the central station causes the desired one of the alarms, the circuit of
-which-is-at-the-same-moment_closed_by_the clock controlled circuit closer, to be
operated.
籍
Also in the clock mechanism, stopping device therefor and circuit closer operated
by the said stopping device in releasing the said clock work, combined with a circuit
closer operated by the said clock work, one of the electrodes of which is adjustable
to cause it to be operated at any desired time in the movement of the said clock
work, and a second circuit closer operated-by-the said clock work during a fixed
definite period of its movement, whereby an individual signalling apparatus and
tap bell signalling apparatus may be operated upon the same line as hereinafter
-described.
Also in the combination of a clock mechanism and stopping device therefor
adapted to arrest its movement at two different fixed points, with a visual signal
operated by the said clock mechanism and adapted to show different signals when
the said clock mechanism is arrested at the said different points, to indicate whether
the line is in use or not.
Also in a signalling apparatus controlled or operated by a mechanically actuated
train or clock work combined with a visual signal operated by the said train in
its movements to indicate when it is necessary to wind up the said clock
movement.
Also in a clock mechanism, a stopping device therefor operated by hand to release
the said clock mechanism, a circuit closer operated by said stopping device in
releasing the said clock mechanism and a circuit closer operated by the said clock
mechanism in its movement whereby an electric impulse is transmitted when the
aid clock mechanism is released or started, followed by another impulse at a
different moment during the movement of the said clock mechanism.
Also in the combination of a clock mechanism and circuit controller operated
thereby to produce electric impulses at definite intervals for the purpose of operating
individual receiving instruments; with a hand operated circuit closer and menus
operated by the said cluck mechanism to retain it in circuit for a definite period
and then automatically remove it from circuit whereby signals may be sent by the
said hand operated key without danger of interfering with the individual signalling
apparatus.
The device at the central station comprises a clock mechanism or spring impelled
train of gears the movement of which is normally arrested by a stop arm upon a
rotating arbor of said mechanism engaging a stopping device provided with a spring
which serves to keep the projection thereof in engagement with the stop arm.
The rotating arbor to which the stop arm is attached carries a metallic revolving
arın having a contact piece.
The said train of wheelwork and the stopping device and revolving arm are

page_text: all electrically connected together and with the line leading to the subscribers
stations.
A metallic plate insulated from the adjacent clock mechanism and connected
revolving arm except as hereinafter described when a call is desired to be inade is
connected electrically with the battery, magneto-machine, or other source of
electrical energy.
This plate has secured to it a revolving contact arm of the saine radius as the
revolving arm and arranged concentrically thereto.
This contact arm is behind the plate in the path of the contact point when
revolved by the action of the clock work. Keyed upon the same pivottal point,
and connected with this arm is an indicating needle or pointer in front of the
plate which is marked with figures as a dial.
A milled head or other suitable handle secured to the said arm and pointer
enables them to be turned or adjusted by hand at the will of the operator.
The figures upon the dial or plate indicate the different points to which the
pointer and connected arm should be turned in order to call a subscriber, the
number of whose station corresponds with the number on the dial face to which
the said pointer is turned.
The dial faco is arranged for ten out stations or subscribers but it is obvious
that any desired number may be similarly arranged.
The stopping device electrically connected with the clock mechanism is so
arranged as to come in contact with the contact point electrically connected with
the plate when the stopping device is actuated or depressed to release the train.
From the foregoing description it will be seen that in the apparatus thus far
described, the train of wheel work with its arm and stopping device form one
member of a circuit closer connected with the line; and the disc arm and contact
point form the other member thereof connected with the battery the said members
being connected to close the circuit from the battery to the line, when the stopping
device is actuated to start the train and again when the contact point of the arm
wipes over the contact arm in the movement of the clock work, the interval
between the two closures of the circuit depending on the position in which the
arm is placed by the operator relative to the starting point of the arm consequently
being different when the pointer is opposite each different figure of the dial.
The receiving apparatus at the subscribers or out stations contains two separate
trains of wheel work or clock mechanism driven by independent actuating springs
or weights.
The arbor of one of the wheels in the said train which is controlled by an
escapement so as to give it a uniform movement is provided with a stop arm
adapted to be engaged by a catch secured to and operated by the armature of an
electro magnet included in the main circuit before described as leading from the
clock mechanism of the transmitting apparatus at the central station. The train
of wheel work is arranged to operate a bell in a manner similar to the striking
train of an ordinary clock one of the wheels of the said train being provided with
a series of pins which in the rotation of the said wheel engages the hammer lever
and vibrates the hammer to strike the said bell.
The said train is controlled by a stopping device having an arm to engage the
fly or governing portion of the said train.
The arin of the said stopping device is operated to raise its arm from a notch
and at the same time to disengage an arm from the fly and let the train move to
operate the signal bell, by the armature of an electro magnet, the said stopping
device when thus disengaged permitting the train to run until another notch is
brought beneath and receives the arm the magnet and the armature being in the
mean time restored to its normal condition.
The train thus running gives a definite number of strokes upon the bell to call
the attention of the subscriber.
The electro magnet which controls the said aların mechanism or train of wheel
work has one electrode connected with the main circuit and the other electrode is

page_text: connected to a contact point normally insulated from the trains of wheel work and
their supporting frame work but lying in the path of the stop arm in its rotation
caused by the train when released.
The said stop arm or frame work of the clock mechanism is connected with the
ground or with the main line leading to the next station and it will be seen that
the circuit of the magnet is open except when the contact point is touched by the
stop arm when the branch circuit will be completed from the said magnet to the
ground or to the main line leading to the next station.
These contact points in the different apparatus in the same circuit are arranged
at different positions relative to the starting point of the stop arins so that contact
will be made after different intervals of time in the synchronous movement of the
trains of wheel work at different stations.
The said stop arm and contact point form a circuit closer controlled by the
train of wheel work.
•

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Morgan-Brown in the Great Seal Patent Office on the
24th October 1882.
WILLIAM MORGAN BROWN, Patent Agent of 38 Southampton Buildings, London.
"IMPROVEMENTS IN THE ARRANGEMENT OF AND IN THE MECHANISM FOR TELEPHONE
ALARMS OR INDIVIDUAL CALLS." A communication from abroad by James Frederick
Kettell of Worcester, Massachusetts United States of America.
This Invention relates to that class of telephone alarins commonly known as
"individual calls," the object of which is to enable the central or main office of a
telephone system to ring the aların of one subscriber or station without ringing
those of the others on the same circuit.
The invention consists in the combination of the following elements, viz:-a
clock mechanism, an electro magnet, and its armature in the main line circuit for
controlling the said clock mechanisia, a branch or grounding circuit and circuit
closer therein controlled by the said clock mechanisui, an alarm mechanism con-
sisting of a mechanically actuated train of gears, and the controlling magnet
therefor located in the said branch or grounding circuit whereby the operation of
the said alarm mechanism is governed by the circuit closer controlled by the clock
mechanism.
Also in a series of apparatus in a single circuit consisting of a clock mechanism,
an electro magnet and its armature in the said circuit for controlling the said
clock mechanism, a branch or grounding circuit and circuit closer therein controlled
by the said clock mechanism, an alarm mechanism consisting of a mechanically
actuated train of gears and the electro magnet and armature in the said branch or
grounding circuit for controlling the said alarm mechanism, the circuit closers in
the said branch circuit controlled by the different clock mechanisins being arranged
to operate at different periods in the synchronous movement of their controlling
clock mechanisms, when all started in unison by a common impulso in their
controlling electro magnets.
Also in a uniformly moving train or clock mechanism at the central station and
circuit closer operated thereby one electrode of the said closer being moved by the
Baid train from a definite starting point and the other being adjustable by the
operator to any position in the path of the said moving electrode, a stopping
device for the said clock work and circuit closer operated by it in the action of
releasing the said clock-mechanism, whereby an impulse is sent over the line at
the moment the clock work is started and a second impulse at a definite moment
in its movement thereafter, in combination with a series of stations each containing
a clock work controlled by an electro magnet in circuit with the said circuit closer,
a circuit closer operated by the said clock work at a different moment at each
station, and an aların controlled by the said circuit closer whereby the first
operation of the said central station instrument affects the electro magnets by
which the station clock works are all started in unison with the said central clock
work, and the second closure of the circuit at the central station causes the desired
one of the alarins, the circuit of which is at the same moment closed by the clock
controlled circuit closer, to be operated.
Also in the clock mechanism, stopping device therefore and circuit closer operated
by the said stopping device in releasing the said clock work, combined with a
circuit closer operated by the said clock work, one of the electrodes of which is
adjustable to cause it to be operated at any desired time in the movement of the
said clock work, and a second circuit closer operated by the said clock work during

page_text: a fixed definite period of its movement, whereby an individual signalling apparatus
and tap bell signaling apparatus may be operated upon the same line as herein-
after described.
Also in the combination of a clock mechanism and stopping device therefore
adapted to arrest its movement at two different fixed points, with a visual signal
operated by the said clock mechanism and adapted to shew different signals when
the said clock mechanism is arrested at the said different points to indicate whether
the line is in use or not.
Also in signaling apparatus controlled or operated by a mechanically actuated
train or clock work combined with a visual signal operated by the said train in
its movements to indicate when it is necessary to wind up the said clock
movement.
Also in a clock mechanism, a stopping device therefore operated by hand to
release the said clock mechanism, a circuit closer operated by said stopping device
in releasing the said clock mechanism and a circuit closer operated by the said
clock mechanism in its movement whereby an electric impulse is transmitted
when the said clock mechanism is released or started, followed by another impulse
at a different moment during the movement of the said clock mechanism.
Also in the combination-of-a-clock-mechanism and circuit controller operated
thereby to produce electric impulses at definite intervals for the purpose of operating
individual receiving instruments; with a hand operated circuit closer and means
operated by the said clock mechanism to retain it in circuit for a definite period
and then automatically remove it from circuit whereby signals may be sent by the
said hand operated key without danger of interfering with the individual signaling
apparatus.
Figure 1, is a front elevation the signalling or receiving apparatus of this
invention, it being located at a subscribers or out station.
Figure 2, a-similar-view-of-the-transmitting apparatus_located at the central or
main station.
Figuro 3, a side elevation partially in section of the said transmitting apparatus
located at the central station.
Figure 4, a diagram illustrating the circuits employed in connection with the
said apparatus at the subscribers stations and a central office.
The device at the central station shewn in Figures 2 and 3 comprises a clock
mechanism or spring impelled train of gears a, the movement of which is normally
arrested by a stop arm b, upon a rotating arbor c of said mechanism engaging the
stopping device e, provided with a spring f, which serves to keep the projection g,
thereof in engagement with the said arm b.
The saine arbor c, to which the stop arm b, is attached carries a metallic revolving
arm i, having a contact piece j.
The said train of wheel work and the stopping device and arm i, are all
electrically connected together and with the line leading to the subscribers
stations.
A metallic place, insulated from the adjacent clock mechanism a, and connected
arm i, except as herein after described when a call is desired to be made is con-
nected electrically with the battery, magneto-machine, or other source of electrical
energy.
This plate has secured to it a revolving contact arm 1, of the same radius as the
arm i, and arranged concentrically thereto.
This arm, is behind the plate in the path of the contact point j, when
revolved by the action of the clock work. Keyed upon the same pivotal point,
and connected with the arm l, is an indicating needle or pointer m, in front of the
plate k, which is marked with figures as a dial.
A milled head n, or other suitable handle secured to the said arm l, and
pointer m, enables them to be turned or adjusted by hand at the will of the
operator.
The figures upon the dial or plate k, indicate the different points to which the

page_text: pointer m, and connected arm L, should be turned in order to call a subscriber, the
number of whose station corresponds with the number on the dial face to which
the said pointer is turned.
The dial face is here shown arranged for ten out stations or subscribers but it is
obvious that any desired number may be similarly arranged.
The stopping device e, electrically connected with the clock mechanism is so
arranged as to come in contact with the contact point o, electrically connected with
the plate, when the said stopping device e is actuated or depressed to release
the train. From the foregoing description it will be seen that in the apparatus
thus far described, the train of wheel work with its arm i, and stopping device e,
forin one member of a circuit closer connected with the line; and the disek, arın l,
and contact point o, form the other member thereof connected with the battery
the said members being connected to close the circuit of the battery to the line,
once at e, o, when the stopping device is actuated to start the train and again when
the contact point j, of the arm i, wipes over the contact arın 6, in the movement of
the clockwork, the interval between the two closures of the circuit deponding on
the position in which the arm l, is placed by the operator relative to the starting
point of the arm 6, and consequently being different when the pointer m, is
opposite cach different figuro of the dial.
The receiving apparatus at the subscribers or out stations shewn in Figure 1,
contains two separate trains of wheel work or clock mechanism a². b. driven by
independent actuating springs or weights.
The arbor c³, of one of the wheels in the said train a which is controlled by an
escapement so as to give it a uniform movement, is provided with a stop arm d³.
adapted to be engaged by a catch e², secured to and operated by the armature f³,
of an electro magnet g, included in the main circuit before described as leading
from the clock mechanisin a, of the transmitting apparatus at the central station.
The train of wheel work b² is arranged to operate a bell h³, in a manner similar to
the striking train of an ordinary clock one of the wheels of the said train being
provided with a series of pins 63, which in the rotation of the said wheel engages
the hammer lever ³, and vibrates the hammer to strike the said bell.
The said train is controlled by a stopping device having an arm i³, to engage
the fly or governing portion of the said train.
The arm of the said stopping device is operated to raise its arm * from the
notch o² and at the same time to disengage the arm is from the fly and let the
train b move to operate the signal bell, by the armature m² of an electro magnet n²,
the said stopping device when thus disengaged permitting the train 6ª to run
until another notch of is brought beneath and receives the arm 2, the magnet n²
and the armature being in the mean time restored to its normal condition.
The train thus running gives a definite number of strokes upon the bell to call
the attention of the subscriber.
The electro magnet n². which controls the said alarm mechanism or train of
wheel work 62 has one electrode connected with the main circuit and the other
electrode is connected to a contact point r, normally insulated from the trains of
wheel work and their supporting frame work but lying in the path of the stop
arm d³ in its rotation caused by the train a when released.
The said stop arın or frame work of the clock mechanism is connected with the
ground or with the inain line leading to the next station and it will be seen that
the circuit of the magnet n is open except when the contact point r is touched by
the stop arm d, when the branch circuit will be completed from the said magnet
to the ground or to the main line leading to the next station.
These contact points in the different apparatus in the same circuit are arranged
at different positions relative to the starting point of the stop arms d³ so that
contact will be made after different intervals of time in the synchronous movement
of the trains of wheel work a at different stations.
The said stop arm d² and contact point r form a circuit closer controlled by the
train of wheel work a

page_text: The operation of the apparatus thus far described will be best understood by
referring to the diagram Figure 4, shewing a transmitting apparatus and two
receiving apparatus in one circuit.
The trains of wheelwork of the different apparatus are regulated to run in
unison and when the pointer m of the transmitting apparatus is opposite Figure 1,
the arm ij will reach the arm at the same moment that the stop arm d reaches
the contact point in the receiving apparatus at the first station, but if the
pointer m is opposite Figure 2, contact will be made between arms i and when
the stop arin reaches the contact point at the second station, the said stop arın
having passed the contact point at the first station and so on.
By placing the pointer at the central station opposite any desired figure and then
depressing the stopping device e the circuit will first be closed between e and o at
the central station sending a current through the starting magnets g² of the
receiving apparatus and thus setting all the trains of wheel work u² in motion
after which the stopping device c will be released and removed by the spring f
from the point o and the circuit will remain open until the arm i reaches the arm
in the transmitting apparatus, at which time the stop arm d² and contact point r
will be connected in that station only which bears the number opposite to which
-the-said-pointer_m_was_set,_a_second_electric_impulse will thus be sent passing
through the-magnetn³ of the said station bearing the number opposite-to-which-
the pointer m
was set, actuating its armature m. and releasing the train of
wheel work b² at this station and causing the alarm to be sounded.
The circuits of the magnets n. at the other stations being open between the
contact points 1, m, and stops arms d² are not effected and the apparatus
consequently remains silent.-
Referring to Figure 1, it will be seen that the armature that controls the
stop arm of the clockwork a. has two stopping projections a. and the next
wheel in the train to the one carrying the stop arm shown as the escape wheel b*
has on its surface a signal disc having portions 20, 21, of different-color-or-
otherwise distinguished from one another. The apparatus is intended to be
enclosed in a case which is provided with an opening or window through which
a portion of the said signal disc appears, and the two stopping projections a*.
are so arranged that when the stop arm is engaged by one of them the
portion of the said signal of one color as for example that marked 20, will
appear and when engaged. by the other projection at the other portion 21 will
appear so that the operator by releasing the stop arms from the first one of the
said projections a. by a current sent from the central station and immediately
removing the said current and allowing the stop arm to be engaged by the second
projection a will cause a signal of the other color to be displayed and can thus
indicate whether or not a line is already in use, the subscriber going to his signal
and seeing one color will know that he can use the line but seeing the other color
will know that somebody else is using the line and that he will have to wait
until the signal is changed.
It is sometimes desirable to place tap bell signals of common construction on the
same circuit with the individual circuit in Figure 1, and for this purpose the trains
of wheelwork will be so arranged that contact will not be made between the
electrodes i of the transmitting apparatus, and the stop arius and the contact
point of the receiving instruments until a sufficient time after the said trains are
started to permit a tap bell signal to be given.
The transmitting instrument will in this instance be provided with a contact
point electrically connected with the plate and resting upon a disc u carried by
the arbor c of the train a.
The said disc is surrounded with insulating material except for a short space 35
which remains in contact with the said contact piece t, during the first portion of
the movement of the train, thus completing the circuit at the transmitting apparatus
from the battery to the line.
A key w, placed in circuit at any desired point between the plate k and spring!

page_text: may be manipulated to give a tap bell signal and it will be seen that the insulated
periphery of the said disk will remove the said key from circuit after the time
allotted to the tap bell signals when it might otherwise interfere with the operation
of the individual signal apparatus.
The trains of wheel work a². 62. are shown as wound in the usual manner by
keys upon the squared arbors a³. 630 and the said arbour a³ is provided with a
pinion shewn as mutilated or deprived of a portion of its teeth.
The said pinion is rotated with the arbor a³ in winding the clock or as the latter
runs down, and engages the gear d³. pivoted upon the frame work with sufficient
friction to prevent its movement except when engaged by the said pinion. The
said gear is provided with a visual signal shown as the word "wind" which is
removed or brought into view through an opening in the enclosing case when the
said gear is rotated by the pinion e³.
.
The said signal indicates to the subscriber that the clock work is to be wound
up and is brought into viow behind the opening when the said clock work has so
far run down as to make it desirable to again wind it.
In the process of winding the signal will be removed from view so as to again
be returned or displayed as the clock runs down.
Having now described and particularly set forth the nature of the said invention
and the manner of carrying the same into effect I would have it understood that
what I claim is:-
1st The combination of the clock mechanism, an electro-magnet, and its
armaturo in the main line circuit for controlling the said clock mechanism a
branch or grounding circuit and circuit closer therein controlled by the said clock
mechanism, an aların mechanism consisting of a mechanically actuated train of
gears, and the controlling magnet therefore located in the said branch or
grounding circuit whereby the operation of the said alarm mechanism is governed
by the circuit closer, controlled by the clock mochanism, substantially as
described.
2nd A series of apparatus in a single circuit, each apparatus consisting of a clock
mechanism, an electro magnet and its armature in the said circuit for controlling
the said clock mechanism, a branch or grounding circuit and circuit closer therein
controlled by the said clock mechanism, an alarm mechanism consisting of a
mechanically actuated train of gears and the electro magnet and armature in
the said branch or grounding circuit for controlling the said alarm mechanism,
the circuit closers in the said branch circuit controlled by the different clock
mechanism being arranged to operate at different periods in the synchronous
movement of their controlling clock mechanism, when all started in unison by a
common impulse in their controlling electro magnets, substantially as described.
3rd A uniformly moving train or clock mechanism at the central station and
circuit closer operated thereby, one electrode of the said closer being moved by the
said train from a definite starting point and the other being adjustable by the
operator to any position in the path of the said moving electrode, a stopping device
for the said clock work and circuit closer operated by it in the action of releasing
the said clock mechanism, whereby an impulse is sent over the line at the moment
the clock work is started and a second impulse at a different moment in its
movement thereafter in combination with a series of stations each containing a
clock work controlled by an electro magnet in circuit with the said circuit closer,
a circuit closer operated by the said clock work at a different moment at each
station, and an alarm controlled by the said circuit closer whereby the first operation
of the said central station instrument effects the electro magnets by which the
station clock works are all started in unison with the said central clock work, and
the second closure of the circuit at the central station caused the desired one of the
alarios, the circuit of which is at the same moment closed by the clock controlled
circuit closer, to be operated substantially as described.
4th A clock mechanism, stopping device therefore and circuit closer operated by
the said stopping device in releasing the said clock work, combined with a circuit

page_text: closer operated by the said clock work, one of the electrodes of which is adjustable
to cause it to be operated at any desired time in the movement of the said clock
work, and a second circuit closer operated by the said clock work during a fixed
definite period of its movement, whereby an individual signaling apparatus and
tap bell signaling apparatus may be operated upon the samne line, substantially as
described.
5th The combination of a clock mechanism and stopping device therefor
adapted to arrest its movement at two different fixed points with a visual signal
operated by the said clock mechanism and adapted to show different signals when
the said clock mechanism is arrested at the different points to indicate whether the
line is in use or not, substantially as described.
6th A signaling apparatus controlled or operated by a mechanically actuated
train or clock work combined with a visual signal operated by the said train in its
movements to indicate when it is necessary to wind up the said clock movement
substantially as described.
7th A clock mechanism, a stopping dovice therefor operated by hand to release
the said clock mechanism, a circuit closer operated by said stopping device in
releasing the said clock mechanism and a circuit closer operated by the said clock
mechanism in its movement whereby an electric impulse is transmitted when the
said clock mechanism-is-released-or-started followed by another impulse at a definite
moment during the movement of the said clock mechanism, substantially-as
described.
--
8th The combination of a clock mechanism and circuit controller operated
thereby to produce electric impulses at definite intervals for the purpose of
operating individual receiving instruments, of a hand operated circuit closer and
means operated by the said clock mechanism-to-retain-it-in circuit_for_a_definite
period and then automatically remove it from circuit whereby signals inay be sent
by the said hand operated key without danger of interfering with the individual
-signaling-apparatus,-substantially_ns_described.
In witness whereof 1 the said William Morgan Brown have hereunto set
iny hand and soal this twenty fourth day of October in the year of our