Improvements in a System of Electrical Transmission.
Year: 1893

page_text: Date of Application, 10th Oct., 1893
Complete Specification Left, 10th July, 1894-Accepted, 11th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in a System of Electrical Transmission.
We, JOB ALBERT DAVIS and ROBERT ASHWORTH FOWDEN, both citizens
of the United States, the former residing at No. 3444 North Sixteenth Street,
in the City and County of Philadelphia, and the latter residing at No. 4 Royal
Street, Germantown, in the City and County of Philadelphia, and State of
Pennsylvania, Electricians, do hereby declare the nature of this invention to be as
follows:-
:-
Our invention has relation in general to a system of electrical transmission; and
more particularly to a step by step electric-motor for controlling synchronously
telegraphic printers, clocks and other instruments.
The principal objects of our invention are first, to provide a simple, durable,
efficient and reliable step-by-step electric-motor in which the vibratory motion of a
spring-controlled armature is transformed into a uniform step by step or inter-
mittent rotary motion; second, to provide a series of accurate and comparatively
inexpensive step-by-step electric-motors adapted for use in a system of electrical
transmission requiring for its successful operation the synchronous step-by-step
movement of a number of independent revoluble members; third, to provide an
electric motor adapted to drive a revoluble member with a uniform intermittent
motion and to limit and equalize the steps of said intermittent motion; and fourth,
to provide a step-by-step electric-motor constructed and arranged for operation in
such manner that a series of the motors looped in line are adapted to synchronously
operate and control clocks, telegraph stock or type-printing instruments.
Our invention consists of a step-by-step electric-motor, comprising a device or
bar responding to electrical impulses or changes in line and provided with pawl
and ratchet connections for imparting an intermittent or step-by-step motion to a
revoluble-member and with detent or pallet-and-escapement connections for
equalizing the steps of motion of the revoluble-member.
Our invention further consists of a system of electrical transmission comprising
a series of step-by-step electric-motors provided respectively with a vibratory
device or bar responding to electrical changes in line and having pawl and ratchet
connections for imparting an intermittent or step-by-step movement to a revoluble
member and having detent or pallet-and-escapement connections for synchronizing
the step-by-step motion of all the revoluble-members.
Our invention further consists of a step-by-step electric-motor, comprising a
revoluble-member provided with ratchet-and-escape wheels, and means responding
to electrical impulses in line and provided with pawls, whereof one operates by a
thrust and the other by a pull to rotate said ratchet-wheel and with detents, stop-
dogs, pallets or anchors for limiting and adjusting the movements of the escape wheel.
Our invention further consists of a series of instruments having a revoluble-
member thereof provided with ratchet-and-escape wheels and having means
responding to electrical impulses in line and provided with pawls, whereof one
operates by a thrust and the other by a pull to rotate said ratchet-wheel and with
detents, stop-dogs, pallets or anchors for limiting and adjusting the movements of
the escape-wheel, and a line circuit controlled by electrical and mechanical devices
actuated by the revoluble-member of an instrument synchronously operated in
conjunction with all the other instruments connected in circuit therewith; and
Our invention further consists of the improvements hereinafter described and
claimed

page_text: It
In our invention a number of revoluble members, for example, the shafts of
instruments such as are commonly employed in printing telegraphs, are respectively
provided with ratchet and with escape wheels that co-operate with vibrating devices
or bars provided with pawls and detents, stop-dogs or pallets in such manner
that the pawls acting through the instrumentality of the ratchet wheels
impart a motion of rotation to the revoluble members, and the detents, stop-dogs
or pallets acting upon the escape-wheels automatically synchronize the step-by-step
movements imparted by the pawls. The required vibratory motions are imparted
to the bars by connecting them respectively with the spring-controlled armatures
of magnets responding to electrical impulses or changes in line. Of course, the
circuits that constitute the means whereby these magnets are energized and
demagnetized may be arranged in many different ways. However, in printing
telegraphs and in many other systems of electrical transmission it is important that
a number of independent shafts should be driven synchronously with an intermittent
or step-by-step motion, and that means should be provided, whereby all of these
shafts may be arrested from the transmitting station. These results may be
accomplished by the employment of local battery circuits at the respective
instruments that traverse respectively the coils of the motor-magnets of the
instruments, and whereof one is controlled at one of the stops of a relay, and
whereof the other is adapted to be closed by a manual-key through an automatic
circuit breaker and closer, and of a line circuit that may be closed by a manual-
switch at the transmitting instrument through the coils of the relay-magnet and
through a second automatic circuit breaker and closer on the shaft thereof.
should be borne in mind that at the transmitter the manual-switch must be shifted
into position for excluding the coils of the relay-magnet, and at the receiver the
manual-switch must be shifted into position for including the coils of the relay-
magnet. Then when a manual-key is depressed at the transmitting instrument the
local circuit through the local circuit closer and breaker will be closed and the
motor-magnet energized and demagnetized, whereby the shaft at the transmitting
station is intermittently revolved. The motions of the shaft at the transmitter
acting through the instrumentality of the line circuit closer and breaker cause the
line circuit to be made and broken through the coils of the relay-magnet at the
receiving station, thus causing the local circuit at the receiving station to be made
and broken through the coils of its motor-magnet with the result that both shafts
are synchronously driven with an intermittent or step-by-step motion by their
complemental motors as long as the manual key is depressed at the transmitting
station. As soon as this key is released the local circuit is interrupted through the
motor-magnet at the transmitting instrument, so that the shafts of both instruments
are arrested. In this connection it may be remarked that when the local circuit
is broken by releasing the key at the transmitting instrument, the local circuit is
broken at the receiving instrument, and the retracting-springs of the motor magnet
armatures of both instruments cause the motor-bars to automatically arrest the
shafts of both instruments in position for causing the local circuit breakers and
closers thereof, to assume a position for permitting the circuits to be again closed
through the local circuit breakers and makers upon the depression of a key.
The nature and general features of our invention will be more fully understood
from the following description taken in connection with the accompanying drawings
forming part hereof; and in which
Figure 1, is a side elevational view of portions of a printing telegraph instrument,
showing a step-by-step electric-motor embodying features of our invention in
application thereto and also shewing the guides for the reciprocating bar of the
motor removed in order to illustrate certain other parts thereof.
Fig. 2, is a top or plan view of the instrument illustrated in Fig. 1, with the top
plate thereof removed in order to expose to view the electric-motor embodying
features of our invention.
Fig. 3, is a detached top or plan view of the motor-bar illustrated in Figs. 1

page_text: Bad & SWING To complemental pay
that co-operate with an escape-wheel.
Fig. 4, is an end view of the motor-bar and its accessories, showing also the
guides for the motor-bar.
Fig. 5, is a side view of a motor-bar embodying a modification of our invention.
Fig. 6, is a detached view of the escape and ratchet-wheels shown in Fig. 5.
Fig. 7, is a top or plan view of the motor-bar illustrated in Fig. 5, showing the
pallet and escapement connections.
Fig. 8, is a similar view of the underside of the motor-bar illustrated in Fig. 5
showing the pawl-and-ratchet connections.
Fig. 9, is a diagrammatic view illustrating one arrangement of circuits for
synchronously operating two or more motors embodying features of our invention.
Fig. 10, is a diagrammatic view, illustrating a series of clocks provided respec-
tively with step-by-step motors, embodying features of our invention and controlled
and synchronized by means of electrical and mechanical devices operated by the
principal clock.
Fig. 11, is a side view partly in section, illustrating a step-by-step electric-motor
in application to one of a series of clocks shown at the right hand side of Fig. 10.
Fig. 12, is a detached plan view, showing a revoluble member provided with a
ratchet-wheel and an escape wheel and a bar provided with pawls operating
respectively by a thrust and a pull to intermittently rotate said member and
with detents, stop-dogs, pallets or anchors for limiting said intermittent motion; and
Fig. 13, is a side view of a circuit breaker and closer operated by the revoluble-
member of the principal clock and adapted to control the line circuit.
Referring now more particularly to Figs. 1 to 4 inclusive of the drawings, a, is
a motor-bar provided with beveled edges a', that are afforded a range of movement
in suitable ways formed in guides a', depending from the top-plate a³, of the
instrument. The center portion of this motor-bar a, is cut away or slotted in order
to accommodate the shaft a', of the instrument. The other extremity of the motor-
bar a,
is secured to the armature-lever as, of the motor-magnet a', by means of a
link a. The spring controlled pawls a" and a, pivotally attached to the upper and
lower portions of the motor-bar a, and the ratchet-wheel a", keyed or otherwise
secured to the shaft a', constitute pawl-and-ratchet connections interposed between
the motor-bar a, and the shaft a. The stop-dogs, detents or pallets all and a",
secured opposite the end portions of the slot in the motor-bar a, and the escape-
wheel a constitute pallet-and-escapement connections interposed between the
motor-bar a and the shaft a*. Whenever the motor-magnet a', is energized, it pulls
up its armature lever as, against the force of the retracting-spring a", and this
motion of the armature lever a³, causes the motor-bar a, to be shifted towards the
left in said figures, so that the pawl a', meshes with the ratchet-wheel a10, and this
shifts the same in the direction indicated by the arrow. The continued movement
of the motor-bar a, causes the fixed detent, stop-dog or pallet a", to engage the
star-shaped teeth of the escape-wheel a", thus accurately adjusting the latter and
then locking it to place. When the motor electro-magnet a', is demagnetized the
armature-lever a', moving under the influence of the spring a", is shifted into the
position illustrated in the drawings. This motion of the armature-lever a' causes
the bar a, to be shifted towards the right in said figures, thus causing the pawl a³,
to shift the shaft at, in the direction indicated by the arrow and the detent, stop-dog
or pallet a", to adjust and lock it to place. The repeated magnetization and
demagnetization of the magnet a', causes the motor-bar a, to be reciprocated back
and forth or vibrated, whereby the shaft at, is revolved with an intermittent or
step-by-step motion and is locked to place at the completion of each step.
circuit through the coils of the magnet a', may be made and broken by the
employment of a great number of different types of circuit breakers and their
complemental connections, for example, by means of an automatic circuit breaker
actuated by the shaft a', as will be hereinafter more fully described.
The
The construction and node of operation of the motor-bar illustrated in Figs. 5

page_text: to inclusive, are as above described with reference to Figs. 1 and 2, with the
following exceptions :-
The guides a, are dispensed with and the edges of the slotted portion of the
motor-bar a, are permitted to ride between the ratchet and escape-wheels and in
contact with the shaft a', whereby the motor-bar a, is guided, and the forms of the
detents, stop-dogs or pallets and of the teeth of the escape-wheel a¹³, are slightly
changed without substantially affecting their mode of operation.
Referring now more particularly to Fig. 9, a description will be given of an
arrangement of circuits adapted to synchronously operate a pair of the hereinabove
described motors in such manner that the same may be arrested. b, is a local
battery at the transmitter of which the circuit passes by a conductor 1, to the coils
of the motor-magnet, a', then by a conductor 2, to one contact spring c, of a local
circuit breaker and closer C, mounted on the shaft a', the hub c³, and then by a
conductor 3, from the other contact spring c¹, of the circuit breaker and closer C,
to a normally open key or series of keys d, and then by a conductor 4, back to the
battery b. The local circuit at the receiver passes by a conductor 5, to the spring
controlled armature lever e, of the relay-magnet E, then through the front stop of
said relay-magnet and by a conductor 6, to the battery b. The line circuit 7, is
divided by a manual-switch f, and one branch of which circuit passes by a
conductor 8, through the coils of the relay magnet E, and then by a conductor 9,
through a line battery k, at the receiver to earth. The other branch of the line
circuit 7, passes by a conductor 10, to one of the contact-springs h, of a line circuit
breaker and closer H, mounted on the shaft a', the hub h2, and then from the other
contact-spring h', of the line circuit breaker and closer H, by a conductor 11, to
the line battery i, at the transmitter to earth.
The mode of operation of the circuits will now be described and in this con-
nection it will be assumed that the instrument illustrated at the right hand side of
Fig. 9, is arranged as a transmitter and that the instrument illustrated at the left
hand side of the same figure is arranged as a receiver. The arrangements or
adjustments of the instrunients, whereby they are adapted to operate as transmitters
or receivers, may be accomplished by shifting the switch f, into position for closing
the circuit through the contact-springs of the line circuit breaker and closer H, at
the transmitting instrument and into position for closing the circuit through the
coils of the relay E, at the receiving instrument, so that each instrument will
operate as a transmitter or receiver according as its switch f, is turned into one or
the other of the described positions. When the normally open key d, is depressed
at the transmitting instrument the local circuit 1, 2, 3, and 4, is closed through
the local circuit breaker and closer C, the motor electro-magnet a', is energized
and thus shifts the motor-bar a, against the force of the spring a", with the result
that both the line and local circuit breakers and closers H, and C, are advanced
one step. This movement of the local circuit breaker and closer C, causes the
contact-spring e, to engage an insulating point c³, and thus breaks the local circuit,
whereupon the motor-bar a, moving under the influence of the spring a, causes
the local circuit breaker and closer C, to be shifted into position for again making
the local circuit, and the repetition of the above operations causes the shaft a', of the
transmitter, to be revolved with a step-by-step inotion as long as the key d, is in
a depressed position. The line circuit breaker and closer H, closes the line
circuit, whenever the local circuit breaker and closer C, interrupts the local
circuit, and breaks the line circuit, whenever the local circuit breaker and
closer C, closes the local-circuit. Whenever the local circuit is broken at the
transmitter the line-circuit is closed through the relay E, at the receiver, thus
causing the local circuit to be closed at the receiver through the front stop of the
relay, but not through the local circuit maker and closer, because the key d, at the
receiver occupies its normal or open position. The closed local circuit 1, 5 and 6,
at the receiver causes the motor-magnet a', thereat to be energized, whereby the
motor-bar a, of the receiver is shifted into the same position as the motor bar a,
at the transmitter. Similarly the local circuit at the receiver is broken, when the

page_text: local circuit at the transmitter is closed, so that both motors are operated
synchronously. As soon as the key d, at the transmitter is released, the local
circuit at the transmitter is broken, whereby both instruments are simultaneously
arrested.
It may be remarked that certain modifications may be made as to details of the
apparatus, for example, a series of keys and their complemental sunflower-devices
may be employed, instead of the single key illustrated in the drawings or a central
station actuated by one of the motors may be interposed in the line circuit or the
disposition and arrangement of the conductors comprising the circuits may be
modified or an electro-magnetic device interposed in a local or other circuit may
be employed in lieu of the retracting-spring s, for controlling the armature-lever a³,
of the motor electro-magnet a'.
Referring now more particularly to Figs. 10 to 13 inclusive, a', is a revoluble-
member, in the present instance, the minute hand spindle or shaft of one of a series
of clocks, which are provided respectively with minute hands, and with hour
hands, controlled by the minute hands through the instrumentality of a train of
gearing 6 and 66, as shewn in Fig. 11. This revoluble member a', is provided with
a ratchet-wheel a, and with an escape-wheel a¹³. a, is a bar provided with a slot
for the accommodation of the revoluble-member a, and guided by means of
collars a, adjustably connected with the revoluble-member a', by means of set-
screws a¹ a and a, are pawls pivotally attached to the bar a, by means of a post
or screw d³, and held normally in engagement with the teeth of the ratchet-wheel a¹º,
by means of a spring s. The working extremity of the pawl as, operates by a
thrust to rotate the ratchet-wheel a", in the direction indicated by the arrow in
the drawings, who the bar a, is shifted toward the left and the working extremity
of the pawl a, is hook-shaped and operates by a pull to rotate the ratchet-wheel a¹,
in the same direction when the bar a, is shifted towards the right. a" and a", are
detents, stop-dogs, pallets or anchors carried by the bar a, and adapted to engage
the teeth of the escape-wheel a", and thus limit and adjust the steps of the
intermittent motion imparted to the revoluble-member a, by the pawls as and a°.
The bar, a, is pivotally connected with the armature-lever a³, of an electro-
magnet a, and this armature-lever a³, is solicited normally into the position
illustrated in the drawings, by means of a retracting spring a", so that when the
circuit is closed through the coils of the electro-magnet a', the armature lever a³, is
pulled up, thus causing the bar a, to be shifted towards the left in the drawings,
with the result that the pawl as, engages the ratchet wheel a, and shifts the
revoluble-member a', and the detent, stop dog, pallet or anchor a¹³, engages the
escape wheel a¹³, and limits and adjusts the range of motion of the revoluble
When the circuit through the magnet a', is interrupted, the bar a,
shifted by the spring a, towards the right, with the result that the pawl a',
engages the ratchet-wheel al, and rotates the member a', whereupon the detent,
stop-dog, anchor or pallet a", engages the escapement-wheel a¹³, and thus adjusts
and limits the range of motion of the member at. C, is a circuit breaker and
closer operated by the minute hand-spindle or shaft a", of the mechanically driven
principal clock m. The circuit breaker and closer in the present instance,
comprises two discs C¹ and H', insulated from the shaft or spindle a", and in
electrical communication with each other. The periphery of the dise H, is of
conducting material, and the periphery of the disc C, is provided with insulating
points or contacts C2, of which there are in the present instance sixty corresponding
to the number of minutes in one hour. The contact spring c', of the circuit breaker
and closer C', is connected to earth through a battery ", by a conductor 12, and the
contact spring, of the circuit breaker and closer ', is connected to earth through
a battery, through the coils of the electro-magnet a', of the motors of a series of
clocks, and 6, by means of a conductor 13.
member a¹.
is
The mode of operation of the hereinabove described apparatus is as follows:-
The revolution of the hour hand spindle or shaft a", causes the circuit breaker
and closer C, to make and break the circuit through the coils of the electro-

page_text: magnets a', of the series of clocks 60, 61 and 6", once every minute, and each make
in the circuit through the coils of the magnets a', causes the bar a, to be shifted
towards the left under the influence of the electro-magnets a', and each break in
the circuit causes the bar a, to be shifted under the influence of the spring a¹,
towards the right, and these movements of the bar a, cause the revoluble member
or minute-hand spindle a', of each clock to be rotated for a distance corresponding
to a minute as designated upon the faces or dials of the clocks 610, 61 and 61. It
being understood that for this purpose the ratchet wheel a¹, is provided with one
hundred and twenty teeth, and that the escape wheel a¹³, is provided with two
hundred and forty teeth, although for the sake of clearness, a less number of teeth
are illustrated in the drawings. The repetition of the herein before described
makes and breaks or impulses in the line circuit causes each of the motors to drive
its corresponding clock in such manner that all the clocks move synchronously and
in unison and are controlled by the principal clock m.
Dated this 10th day of October 1893.
J. G. LORRAIN,
Associate Agent.
COMPLETE SPECIFICATION.
Improvements in a System of Electrical Transmission.
We, JOB ALBERT DAVIS and ROBERT ASHWORTH FOWDEN, both citizens
of the United States, the former residing at No. 3444 North Sixteenth Street, in
the City and County of Philadelphia, and the latter residing at No. 4 Royal
Street, Germantown, in the City and County of Philadelphia, and State of
Pennsylvania, Electricians, 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 :-
Our invention has relation in general to a system of electrical transmission; and
more particularly to a step by step electric-motor for controlling synchronously
telegraphic printers, clocks and other instruments.
The principal objects of our invention are first, to provide a simple, durable,
efficient and reliable step-by-step electric-motor in which the vibratory motion of a
spring-controlled armature is transformed into a uniform step by step or inter-
mittent rotary motion; second, to provide a series of accurate and comparatively
inexpensive step-by-step electric-motors adapted for use in a system of electrical
transmission requiring for its successful operation the synchronous step-by-step
movement of a number of independent revoluble members; third, to provide an
electric motor adapted to drive a revoluble member with a uniform intermittent
motion and to limit and equalize the steps of said intermittent motion; and
fourth, to provide a step-by-step electric-motor constructed and arranged for
operation in such manner that a series of the motors looped in line are adapted
to synchronously operate and control clocks, telegraph stock or type-printing
instruments.
Our invention consists of a step-by-step electric-motor, comprising a device or
bar responding to electrical impulses or changes in line and provided with pawl
and ratchet connections for imparting an intermittent or step-by-step motion to a
revoluble-member and with detent or pallet-and-escapement connections for
equalizing the steps of motion of the revoluble-member.
Our invention further consists of a system of electrical transmission comprising
a series of step-by-step electric-motors provided respectively with a vibratory
device or bar responding to electrical changes in line and having pawl-and-ratchet
connections for imparting an intermittent or step-by-step movement to a revoluble-
member and having detent or pallet-and-escapement connections for synchronizing
the step-by-step motion of all the revoluble-members.

page_text: Our invention further consists of a step-by-step electric-motor, comprising a
revoluble-member provided with ratchet-and-escape wheels, and means responding
to electrical impulses in line and provided with pawls, whereof one operates by a
thrust and the other by a pull to rotate said ratchet-wheel and with detents, stop-
dogs, pallets or anchors for limiting and adjusting the movements of the escape-
wheel.
Our invention further consists of a series of instruments having a revoluble-
member thereof provided with ratchet-and-escape wheels and having means
responding to electrical impulses in line and provided with pawls, whereof one
operates by a thrust and the other by a pull to rotate said ratchet-wheel and with
detents, stop-dogs, pallets or anchors for limiting and adjusting the movements of
the escape-wheel, and a line circuit controlled by electrical and mechanical devices.
actuated by the revoluble-member of an instrument synchronously operated in
conjunction with all the other instruments connected in circuit therewith; and
Our invention further consists of the improvements hereinafter described and
claimed.
In our invention a number of revoluble members, for example, the shafts of
instruments such as are commonly employed in printing telegraphs, are respectively
provided with ratchet and with escape wheels that co-operate with vibrating
devices or bars provided with pawls and detents, stop-dogs or pallets in such
manner that the pawls acting through the instrumentality of the ratchet wheels
impart a motion of rotation to the revoluble members, and the detents, stop-dogs
or pallets acting upon the escape-wheels automatically synchronize the step by step
movements imparted by the pawls. The required vibratory motions are imparted
to the bars by connecting them respectively with the spring-controlled armatures
of magnets responding to electrical impulses or changes in line. Of course, the
circuits that constitute the means whereby these magnets are energized and
demagnetized may be arranged in many different ways. However, in printing
telegraphs and in many other systems of electrical transmission it is important that
a number of independent shafts should be driven synchronously with an intermittent
or step-by-step motion, and that means should be provided, whereby all of these
shafts may be arrested from the transmitting station. These results may be
accomplished by the employment of local battery circuits at the respective
instruments that traverse respectively the coils of the motor-magnets of the
instruments, and whereof one is controlled at one of the stops of a relay, and
whereof the other is adapted to be closed by a manual-key through an automatic
circuit breaker and closer, and of a line circuit that may be closed by a manual-
switch at the transmitting instrument through the coils of the relay-magnet and
through a second automatic circuit breaker and closer on the shaft thereof. It should
be borne in mind that at the transmitter the manual-switch must be shifted into
position for excluding the coils of the relay-magnet, and at the receiver the
manual-switch must be shifted into position for including the coils of the relay-
magnet. Then when a manual-key is depressed at the transmitting instrument the
local circuit through the local circuit closer and breaker will be closed and the
motor-magnet energized and demagnetized, whereby the shaft at the transmitting
station is intermittently revolved. The motions of the shaft at the transmitter
acting through the instrumentality of the line circuit closer and breaker cause the
line circuit to be made and broken through the coils of the relay-magnet at the
receiving station, thus causing the local circuit at the receiving station to be made
and broken through the coils of its motor-magnet with the result that both shafts
are synchronously driven with an intermittent or step-by-step motion by their
complemental motors as long as the manual key is depressed at the transmitting
station. As soon as this key is released the local circuit is interrupted through
the motor-magnet at the transmitting instrument, so that the shafts of both
instruments are arrested. In this connection it may be remarked that when the
local circuit is broken by releasing the key at the transmitting instrument, the
local circuit is broken at the receiving instrument, and the retracting-springs of

page_text: the motor magnet armatures of both instruments cause the motor-bars to
automatically arrest the shafts of both instruments in position for causing the
local circuit breakers and closers thereof, to assume a position for permitting the
circuits to be again closed through the local circuit breakers and makers upon
the depression of a key.
The nature and general features of our invention will be more fully understood
from the following description taken in connection with the drawings left with the
Provisional Specification; and in which
Figure 1, is a side elevational view of portions of a printing telegraph instrument,
showing a step-by-step electric-motor embodying features of our invention in
application thereto and also showing the guides for the reciprocating bar of the
motor removed in order to illustrate certain other parts thereof.
Fig. 2, is a top or plan view of the instrument illustrated in Fig. 1, with the top
plate thereof removed in order to expose to view the electric-motor embodying
features of our invention.
Fig. 3, is a detached top or plan view of the motor-bar illustrated in Figs. 1
and 2, showing its complemental pawl-and-ratchet connections and also the pallets
that co-operate with an escape-wheel.
Fig. 4, is an end view of the motor-bar and its accessories, showing also the
guides for the motor-bar.
Fig. 5, is a side view of a motor-bar embodying a modification of our invention.
Fig. 6, is a detached view of the escape and ratchet-wheels shown in Fig. 5.
Fig. 7, is a top or plan view of the motor-bar illustrated in Fig. 5, showing the
pallet and escapement connections.
Fig. 8, is a similar view of the underside of the motor-bar illustrated in Fig. 5,
showing the pawl-and-ratchet connections.
Fig. 9, is a diagrammatic view illustrating one arrangement of circuits for
synchronously operating two or more motors embodying features of our invention.
Fig. 10, is a diagrammatic view, illustrating a series of clocks provided respec-
tively with step-by-step motors, embodying features of our invention and controlled
and synchronized by means of electrical and mechanical devices operated by the
principal clock.
Fig. 11, is a side view partly in section, illustrating a step-by-step electric-motor
in application to one of a series of clocks shown at the right hand side of Fig. 10.
Fig. 12, is a detached plan view, showing a revoluble-member provided with a
ratchet-wheel and an escape wheel and a bar provided with pawls operating respec-
tively by a thrust and a pull to intermittently rotate said member and with detents,
stop-dogs, pallets or anchors for limiting said intermittent motion; and
Fig. 13, is a side view of a circuit breaker and closer operated by the revoluble-
member of the principal clock and adapted to control the line circuit.
a,
Referring now more particularly to Figs. 1 to 4 inclusive of the drawings, a, is
a motor-bar provided with bevelled edges a', that are afforded a range of movement
in suitable ways formed in guides a³, depending from the top-plate a, of the instru
ment. The centre portion of this motor-bar a, is cut away or slotted in order to
accommodate the shaft a', of the instrument. The other extremity of the
motor-bar is secured to the armature-lever a³, of the motor-magnet a', by means
of a link a. The spring controlled pawls a and a³, pivotally attached to the upper
and lower portions of the motor-bar a, and the ratchet-wheel a", keyed or otherwise
secured to the shaft a, constitute pawl-and-ratchet connections interposed between
the motor-bar a, and the shaft a. The stop-dogs, detents or pallets a" and a",
secured opposite the end portions of the slot in the motor-bar a, and the escape-
wheel a constitute pallet-and-escapement connections interposed between the
motor bar a and the shaft a. Whenever the motor-magnet a', is energized, it pulls
up its armature lever a³, against the force of the retracting-spring a", and this
motion of the armature-lever a³, causes the motor-bar a, to be shifted towards the
left in said figures, so that the pawl a³, meshes with the ratchet-wheel a¹0, and this
shifts the same in the direction indicated by the arrow. The continued movement

page_text: of the motor-bar a, causes the fixed detent, stop-dog or pallet a", to engage the
star-shaped teeth of the escape-wheel a¹³, thus accurately adjusting the latter and
then locking it to place. When the motor electro-magnet a', is demagnetized the
armature-lever a, moving under the influence of the spring a", is shifted into the
position illustrated in the drawings. This motion of the armature-lever a', causes
the bar a, to be shifted towards the right in said figures, thus causing the pawla",
to shift the shaft a', in the direction indicated by the arrow and the detent, stop-dog
or pallet al, to adjust and lock it to place. The repeated magnetization and
demagnetization of the magnet a', causes the motor-bar a, to be reciprocated back
and forth or vibrated, whereby the shaft a', is revolved with an intermittent or step-
by-step motion and is locked to place at the completion of each step. The circuit
through the coils of the magnet a', may be made and broken by the employment of
a great number of different types of circuit breakers and their complemental con-
nections, for example, by means of an automatic circuit breaker actuated by the
shaft a', as will be hereinafter more fully described.
The construction and mode of operation of the motor-bar illustrated in Figs. 5
to 8 inclusive, are as above described with reference, to Figs. 1 and 2, with the
following exceptions :-
The guides a³, are dispensed with and the edges of the slotted portion of the
motor-bar a, are permitted to ride between the ratchet and escape-wheels and in
contact with the shaft a', whereby the motor-bar a, is guided, and the forms of the
detents, stop-dogs or pallets and of the teeth of the escape-wheel a", are slightly
changed without substantially affecting their mode of operation.
Referring now more particularly to Fig. 9, a description will be given of an
arrangement of circuits adapted to synchronously operate a pair of the herein-
above described motors in such manner that the same may be arrested. b, is a
local battery at the transmitter of which the circuit passes by a conductor 1, to
the coils of the motor-magnet a', then by a conductor 2, to one contact spring c, of
a local circuit breaker and closer C, mounted on the shaft a', the hub c³, and then
by a conductor 3, from the other contact spring c', of the circuit breaker and
closer C, to a normally open key or series of keys d, aud then by a conductor 4,
back to the battery b. The local circuit at the receiver passes by a conductor 5,
to the spring controlled armature-lever e, of the relay-magnet E, then through the
front stop of said relay-magnet and by a conductor 6, to the battery b. The line
circuit 7, is divided by a manual-switch f, and one branch of which circuit passes
by a conductor 8, through the coils of the relay magnet E, and then by a
conductor 9, through a line battery k, at the receiver to earth. The other branch
of the line circuit 7, passes by a conductor 10, to one of the contact-springs h, of
a line circuit breaker and closer H, mounted on the shaft at, the hub ³, and then
from the other contact-spring h¹, of the line circuit breaker and closer H, by a
conductor 11, to the line battery i, at the transmitter to earth.
The mode of operation of the circuits will now be described, and in this connection
it will be assumed that the instrument illustrated at the right hand side of Fig. 9, is
arranged as a transmitter and that the instrument illustrated at the left band side
of the same figure is arranged as a receiver. The arrangements or adjustments of
the instruments, whereby they are adapted to operate as transmitters or receivers,
may be accomplished by shifting the switch f, into position for closing the circuit
through the contact-springs of the line circuit breaker and closer H, at the trans-
mitting instrument and into position for closing the circuit through the coils of the
relay E, at the receiving instrument, so that each instrument will operate as a
transmitter or receiver according as its switch f, is turned into one or the other of
the described positions. When the normally open key d, is depressed at the trans-
mitting instrument the local circuit 1, 2, 3 and 4, is closed through the local circuit
breaker and closer C, the motor electro-magnet a', is energized and thus shifts the
motor-bar a, against the force of the spring a", with the result that both the line
and local circuit breakers and closers H and C, are advanced one step. This.

page_text: movement of the local circuit breaker and closer C, causes the contact-spring c; to
engage an insulating point c', and thus breaks the local circuit, whereupon the
motor-bar a, moving under the influence of the spring a, causes the local circuit
breaker and closer C, to be shifted into position for again making the local circuit,
and the repetition of the above operations causes the shaft a', of the transmitter,
to be revolved with a step-by-step motion as long as the key d, is in a depressed
position. The line circuit breaker and closer H, closes the line circuit, whenever the
local circuit breaker and closer C, interrupts the local circuit, and breaks the line circuit,
whenever the local circuit breaker and closer C, closes the local-circuit. Whenever the
local circuit is broken at the transmitter the line-circuit is closed through the relay E,
at the receiver, thus causing the local circuit to be closed at the receiver through
the front stop of the relay, but not through the local circuit maker and closer,
because the key d, at the receiver occupies its normal or open position. The closed
local circuit 1, 5 and 6, at the receiver causes the motor-magnet a', thereat to be
energized, whereby the motor-bar a, of the receiver is shifted into the same position
as the motor-bar a, at the transmitter. Similarly the local circuit at the receiver
is broken, when the local circuit at the transmitter is closed, so that both motors
are operated synchronously. As soon as the key d, at the transmitter, is released
the local circuit at the transmitter is broken, whereby both instruments are
simultaneously arrested.
It may be remarked that certain modifications may be made as to details of the
apparatus, for example, a series of keys and their complemental sunflower-devices
may be employed, instead of the single key illustrated in the drawings or a central
station actuated by one of the motors may be interposed in the line circuit or the
disposition and arrangement of the conductors comprising the circuits may be
modified or an electro-magnetic device interposed in a local' or other circuit may be
employed in lieu of the retracting-spring s¹, for controlling the armature-lever a,
of the motor electro-magnet a².
Referring now more. particularly to. Figs. 10 to 13 inclusive, a, is a revoluble-
member, in the present instance, the minute hand spindle or shaft of one of a
series of clocks, which are provided respectively with minute hands b³, and with
hour hands, controlled by the minute hands through the instrumentality of a
train of gearing and 6°, as shown in Fig. 11. This revoluble member a*, is
provided with a ratchet-wheel a 10, and with an escape-wheel a".
a, is a bar
provided with a slot for the accommodation of the revoluble-member a*, and
guided by means of collars a", adjustably connected with the revoluble-member a*,
by means of set-screws a. a and a, are pawls pivotally attached to the bar a,
by means of a post or screw d',. and held normally in engagement with the teeth
of the ratchet-wheel a¹0, by means of a spring s. The working extremity of the
pawla, operates by a thrust to rotate the ratchet-wheel a, in the direction
indicated by the arrow in the drawings, when the bar a, is shifted towards the
left and the working extremity of the pawl a', is hook-shaped and operates by a pull
to rotate the ratchet-wheel a, in the same direction when the bar a, is shifted
towards the right. a" and a", are detents, stop-dogs, pallets or anchors carried by
the bar a, and adapted to engage the teeth of the escape-wheel a", and thus limit
and adjust the steps of the intermittent motion imparted to the revoluble-member a*,
by the pawls a and a. The bar a, is pivotally connected with the armature-
lever a³, of an electro-magnet a,. and this armature-lever a', is solicited normally
into the position illustrated in the drawings, by means of a retracting-spring a, so
that when the circuit is closed through: the coils of the electro-magnet a the
armature-lever. a', is pulled up, thus causing the bar a, to be shifted towards the
left in the drawings, with the result that the pawl as, engages the ratchet-wheel a¹º,
and shifts the revoluble-member at, and the detent, stop-dog, pallet or anchor a",
engages the escape-wheel a", and limits and adjusts the range of motion of the
revoluble-member a*. When the circuit through the magnet a', is interrupted,
the bar a, is shifted by the spring a", towards the right, with the result that the
pawl a, engages the ratchet-wheel a¹, and rotates the member a', whereupon
.

page_text: the detent, stop dog, anchor or pallet al, engages the escapement-wheel a", and thus
adjusts and limits the range of motion of the member a. C', is a circuit breaker
and closer operated by the minute hand-spindle or shaft a", of the mechanically
driven principal clock m. The circuit breaker and closer in the present instance,
comprises two discs C¹ and H³, insulated from the shaft or spindle a¹, and in
electrical communication with each other. The periphery of the disc H', is of
conducting material, and the periphery of the disc C', is provided with insulating
points or contacts, of which there are in the present instance sixty corresponding
to the number of minutes in one hour. The contact spring c, of the circuit
breaker and closer C', is connected to earth through a battery i, by a conductor .12,
and the contact spring, of the circuit breaker and closer H, is connected to
earth through a battery, through the coils of the electro-magnet a', of the motors
of a series of clocks 60, 61 and 61, by means of a conductor 13.
The mode of operation of the hereinabove described apparatus is as follows:-
The revolution of the hour hand spindle or shaft a", causes the circuit breaker
and closer C¹, to make and break the circuit through the coils of the electro-
magnets a', of the series of clocks 60, 6" and ", once every minute, and each make
in the circuit through the coils of the magnets a', causes the bar a, to be shifted
towards the left under the influence of the electro-magnets a', and each break in
the circuit causes the bar a, to be shifted under the influence of the spring a¼,
towards the right, and these movements of the bar a, causes the revoluble member
or minute-hand spindle a', of each clock to be rotated for a distance corresponding to
a minute as designated upon the faces or dials of the clocks 60, 61 and 61.
being understood that for this purpose the ratchet-wheel do, is provided with
one hundred and twenty teeth, and that the escape-wheel a¹, is provided with
two hundred and forty teeth, although for the sake of clearness, a less number of
teeth are illustrated in the drawings. The repetition of the herein before described
makes and breaks or impulses in the line circuit causes each of the motors to drive
its corresponding clock in such manner that all the clocks move synchronously and
in unison and are controlled by the principal clock m.
It
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
1. In a system of electrical transmission, a step-by-step electric-motor, comprising
a longitudinally movable bar responding to electrical impulses in line and provided
with pawl-and-ratchet connections for imparting a step-by-step motion to a revoluble-
member and with detent or pallet and escapement connections for equalizing said
step-by-step motion, substantially as and for the purposes set forth.
2. In a system of electrical transmission, a step-by-step electric-motor, comprising
.a bar having a to and fro longitudinal movement and provided with pawls for
imparting a step-by-step motion to a revoluble-member and with detents or pallets
for equalizing and limiting said step-by-step motion, substantially as and for the
purposes set forth.
3. In a system of electrical transmission, a step-by-step electric-motor, comprising
a bar connected with the armature of an electro-magnet and provided with pawl
and ratchet connections for imparting a step-by-step motion to a revoluble-member
and with detent or pallet and escapement connections for equalizing said step-by-
step motion, substantially as and for the purposes set forth.
4. In a system of electrical transmission, a step-by-step electric motor, comprising
() a bar connected with the spring controlled armature lever of an electro-magnet and
provided with pawl-and-ratchet connections for driving a revoluble-member and
with detent or pallet and escapement connections for limiting the movement of the
.revoluble-member, substantially as and for the purposes set forth.
5. In a system of electrical transmission, a step-by-step electric-motor, comprising
5 a revoluble member, an electro-magnet having a controlled armature-lever, a bar
connected with said armature-lever by a link and pawl and ratchet and detent or

page_text: pallet and escapement connections interposed between said bar and revoluble-
member, substantially as and for the purposes set forth.
shaft
6. In a system of electrical transmission, a step-by-step electric-motor,
provided with ratchet and escape-wheels, and a bar slotted for the accommodation
of said shaft and provided at the sides of said slot with pawls engaging said
ratchet-wheel and at the ends of said slot with detents or pallets for engaging said
escape-wheel, substantially as and for the purposes set forth.
7. In a system of electrical transmission, a step-by-step electric-motor, comprising
a shaft provided with ratchet and escape-wheels, a bar slotted for the accommodation
of said shaft and provided at the sides of said slot with spring controlled pivotal
pawls engaging said ratchet-wheel and at the ends of said slot with fixed detents or
pallets for engaging said escape-wheel, and an electro-magnet for operating said
bar, substantially as and for the purposes set forth.
8. In a system of electrical transmission, a step-by-step electric-motor, a
revoluble-shaft provided with ratchet and escape-wheels, a bar slotted for the
accommodation of said shaft and provided at the sides of said slot with pawls
engaging said ratchet-wheel and at the ends of said slot with detents or pallets for
engaging said escape-wheel, and guides for said bar, substantially as and for the
purposes set forth.
9. In a system of electrical transmission, a step-by-step electric motor, comprising
a bar responding to electrical impulses in line and provided with pawl-and-ratchet
connections for imparting motion to a revoluble-member and with pallets and
escapement connections for equalizing the steps of the motion of the revoluble
inember, and guides for said bar, substantially as and for the purposes set forth.
10. In a system of electrical transmission, a step-by-step electric-motor, comprising
a bar connected with the armature of an electro-magnet and provided with pawl-
and-ratchet connections for imparting a step-by-step motion to a revoluble-member
and with pallet and escapement connections for equalizing the steps of motion of
said member, and a circuit breaker and closer mounted on said revoluble-member
and adapted to make and break the circuit through the coils of said electro-magnet,
substantially as and for the purposes set forth.
11. In a system of electrical transmission, a step-by-step electric motor, comprising
a revoluble member, a bar connected with the armature of an electro-magnet and
provided with pawl-and-ratchet and pallet and escapement connections for actuating
said revoluble-member, a circuit breaker and closer mounted on said revoluble-
member and adapted to break the circuit through the coils of said magnet after its
armature is pulled up, and a spring for shifting said bar to bring the circuit breaker
and closer into position for making the circuit through the coils of said magnet,
substantially as and for the purposes set forth.
12. In a system of electrical transmission, a step-by-step electric-motor, comprising
a revoluble member, an electro-magnet having a spring controlled armature-lever,
a bar connected with said armature-lever by a link, pawl-and-ratchet and pallet
and escapement connections interposed between said bar and revoluble-member, and
a circuit breaker and closer mounted upon said revoluble-member and adapted to
control the circuit of said magnet, substantially as and for the purposes set forth.
13. In a system of electrical transmission, a step-by-step electric-motor, comprising
a revoluble member provided with ratchet and escapement wheels, a motor bar
slotted for the accommodation of said shaft and provided at the sides of said slot
with pawls engaging said ratchet-wheel and at the ends of said slot with pallets
engaging said escapement-wheel, an electro-magnet for operating said bar and a
circuit breaker and closer mounted on said revoluble-member and adapted to
control the circuit of said electro-magnet, substantially as and for the purposes set
.forth.
14. In a system of electrical transmission, a step-by-step electric-motor, comprising
a bar responding to electrical impulses in line and provided with pawl-and-ratchet
connections for imparting a step-by-step motion to a revoluble-member and with
pallet-and-escapement connections for equalizing said step-by-step motion, and

page_text: electrical and mechanical devices operated by the revoluble-member and adapted
to control the impulses in the line, substantially as and for the purposes set forth.
15. In a system of electrical transmission, a series of step-by-step electric motors
provided respectively with a vibratory-bar responding to electrical impulses in line
and having pawl-and-ratchet connections for imparting a step-by-step movement to
a revoluble-member and having pallet-and-escapement connections for limiting the
step-by-step motion to the revoluble-member, and mechanical and electrical devices
for positively actuating one of said revoluble-members and for causing the same to
synchronously operate the other motors, substantially as and for the purposes set
forth.
16. In a system of electrical transmission, two stations provided respectively
with electro-magnets adapted to operate bars having pawl-and-ratchet and pallet-
and-escapement connections for intermittently rotating a shaft, a relay-magnet,
local circuits controlled by a key and adapted to be closed through the stops of said
relay and through the contacts of a local circuit breaker and closer mounted on
said shaft, and a line circuit adapted to be closed by manual-keys at each station
through the coils of said relays and through the contacts of a line circuit breaker
and closer on said shaft, the construction and arrangement being such that the
shaft at the transmitting station is rotated by the depression of the key and
consequently closing the local circuit through its circuit breaker and closer and the
shaft at the receiving station is rotated by the closing of its local circuit by the
relay, substantially as and for the purposes set forth.
17. In a system of electrical transmission, a step-by-step electric motor, comprising
a shaft, an electro-magnet, a bar, pawl-and-ratchet and pallet-and-escapement
connections between said bar and a spring controlled armature-lever of said magnet,
in combination with a local battery circuit adapted to be closed by a manual-key
through a local circuit breaker and closer, and a circuit breaker and closer adapted
to transmit electrical impulses to line, substantially as and for the purposes set
forth.
18. In a system of electrical transmission, a motor comprising a shaft, an electro-
magnet, a bar, pawl-and-ratchet and pallet-and-escapement connections between
said bar and the spring controlled armature-lever of said magnet, in combination
with a local battery circuit adapted to be closed through said magnet, and a relay
controlling said local battery circuit and responding to impulses in a line battery
circuit, substantially as and for the purposes set forth.
19. In a system of electrical transmission, a transmitting station provided with
an electro-magnet, a shaft, a bar, pawl-and-ratchet and pallet-and-escapement
connections between said bar and the spring controlled armature-lever of said
magnet, a local battery circuit adapted to be closed by a manual-key through a
local circuit breaker and closer, a circuit breaker and closer adapted to transmit
electrical impulses through a line battery circuit, and a receiving station provided
with a shaft, an electro-magnet, a bar, pawl-and-ratchet and pallet-and-escapement
connections between said bar and the spring controlled armature-lever of said
magnet, a local battery circuit adapted to be closed through said magnet, and a
relay controlling said local battery circuit and responding to impulses in the line
battery circuit, substantially as and for the purposes set forth.
20. In a system of electrical transmission, a step-by-step electric-motor, comprising
a revoluble member provided with ratchet-and-escape wheels, and a device or bar
responding to electrical impulses and provided with pawls operating respectively
by a thrust and a pull to rotate said ratchet-wheel and with detents, pallets, stop-
dogs or anchors for limiting and adjusting the movements of the escape-wheel,
substantially as and for the purposes set forth.
21. In a system of electrical transmission, a step-by-step electric-motor, comprising
a bar responding to electrical impulses in line and provided with pawls operating
respectively by a thrust and a pull to drive a revoluble-member and with means
for limiting the motions of said member, substantially as and for the purposes set
forth.

page_text: .
22. In a system of electrical transmission, a step-by-step electric-motor, comprising
a revoluble-member provided with ratchet and escape wheels, a bar provided with
pawls operating respectively by a thrust and a pull to rotate said ratchet-wheel and
with detents, pallets, stop-dogs or anchors for limiting and adjusting the movements
of the escape-wheel, and an armature-lever connected with said bar and responding
to electrical impulses through the coils of its magnet, substantially as and for the
purposes set forth.
23. In a system of electrical transmission, a step-by-step electric-motor, comprising
a revoluble-member provided with ratchet and escape-wheels, a bar provided with
pawls operating respectively by a thrust and a pull to rotate said ratchet-wheel and
with pallets, stop-dogs or anchors for limiting and adjusting the movements of the
escape-wheel, an armature-lever connected with said bar and responding to electrical
impulses through the coils of its magnet, and a retracting spring for said lever,
substantially as and for the purposes set forth.
24. In a system of electrical transmission, a step-by-step electric-motor having
a revoluble member provided with ratchet and escape-wheels, means provided with
a slot for the accommodation of said revoluble member, pawls pivotally attached to
said means by a stud or screw and operating respectively by a thrust and pull to
rotate said ratchet wheel and detents, pallets or stop-dogs for limiting and
adjusting the movements of the escape-wheel, substantially as and for the purposes
set forth.
25. In a system of electrical transmission, a step-by-step electric-motor, comprising
a revoluble-member provided with ratchet and escape wheels, means responding to
electrical impulses in line and provided with spring controlled-pawls operating
respectively by a thrust and pull to rotate said ratchet-wheel and with detents,
stop-dogs, pallets or anchors for limiting and adjusting the movements of the
escape-wheel, substantially as and for the purposes set forth.
26. In a system of electrical transmission, a step-by-step electric motor, a
revoluble member provided with ratchet and escape-wheels, slotted means for the
accommodation of said revoluble member and provided with pawls operating
respectively by a thrust and a pull to rotate said ratchet-wheel and with pallets,
stop-dogs or anchors for limiting and adjusting the movements of the escape-wheels,
substantially as and for the purposes set forth.
27. In a system of electrical transmission, a step-by-step electric motor, a
revoluble-member provided with ratchet and escape-wheels, a slotted-bar for the
accommodation of said revoluble member and provided with pawls operating
respectively by a thrust and a pull to rotate said ratchet-wheel and pallets, stop-dogs
or anchors for limiting and adjusting the movements of the escape-wheels, and
collars for guiding said bar, substantially as and for the purposes set forth.
28. The combination, in a system of electrical transmission, of a series of
instruments having a revoluble member provided with ratchet and escape-wheels,
means, substantially as described, responding to electrical impulses in line and
provided with pawls, whereof one operates by a thrust and the other by a pull to
rotate said ratchet-wheel and pallets, detents or anchors for limiting and adjusting
the movements of the escape-wheel, and a line circuit controlled by electrical and
mechanical devices, substantially as described, actuated by a principal instrument
and adapted to synchronously operate all the primary instruments therewith,
substantially as and for.the purposes set forth.
.29. The combination, in a system of electrical transmission, of a series of instru-
ments having a revoluble-member provided with ratchet and escape-wheels, a har
responding to electrical impulses in 'line and provided with pawls, whereof one
operates by a pull and the other by a thrust to rotate said ratchet-wheel, detents,
pallets or anchors for limiting and adjusting the movement of the escape-wheel, and
a line circuit controlled by a circuit breaker and closer actuated by a principal
instrument and adapted to synchronously operate all the other instruments in circuit
therewith, substantially as and for the purposes set forth.
30. In a system of electrical transmission, a step-by-step electric-motor, com-

page_text: prising a revoluble member provided with ratchet and escape-wheels, and a slotted
device or bar for accommodating said revoluble member responding to electrical
impulses and provided with pawls, whereof one is provided with a hook-shaped
extremity and operates by a pull and whereof the other operates by a push or
thrust to rotate said ratchet-wheel, and detents, pallets, stop-dogs or anchors
mounted on said device or bar and adapted to limit and adjust the movements of
the escape-wheel, substantially as and for the purposes set forth.
31. In a system of electrical transmission, a step-by-step electric-motor, having a
revoluble member provided with ratchet and escape-wheels, a bar provided with a
slot for the accommodation of said revoluble member, and with pivotal pawls,
whereof one is provided with a hook-shaped extremity and rotates said ratchet-
wheel by a pull and whereof the other rotates said ratchet-wheel by a push or
thrust, and detents, pallets or stop-dogs carried by said bar and adapted to limit
and adjust the movements of the escape-wheel, substantially as and for the purposes.
set forth.
32. The combination, in a system of electrical transmission, of a series of
instruments having a revoluble member provided with ratchet and escape-wheels,.
a slotted device for the accommodation of said revoluble member and responding
to electrical impulses in line and provided with pawls, whereof one operates by a
thrust and the other is provided with a hook-shaped extremity and operates by a
pull to rotate said ratchet-wheel, pallets, detents, or anchors for limiting and
adjusting the movements of the escape-wheel, a line circuit, electrical and mechanical
devices actuated by a principal instrument and adapted to synchronously operate
all the primary instruments therewith, substantially as and for the purposes set
forth.
33. The combination, in a system of electrical transmission, of a series of
instruments having a revoluble-member provided with ratchet and escape-wheels,
a slotted bar for the accommodation of said revoluble member responding to electrical
impulses in line and provided with pawls, whereof one is provided with a hook-
shaped extremity adapted to operate by a pull and whereof the other is adapted
to operate by a thrust to rotate said ratchet-wheel, detents, pallets or anchors for
limiting and adjusting the movement of the escape-wheel, and a line circuit
controlled by a circuit breaker and closer actuated by a principal instrument and
adapted to synchronously operate all the other instruments looped or connected in.
circuit therewith, substantially as and for the purposes set forth.
Dated this 10th day of July 1894.
Dated this 10th day of July 1894.
For the Applicants,
J. G. LORRAIN, M. Inst. M.E., M. Inst. E.E.,
Chartered Patent Agent.