Year: 1887

page_text: This Specification was, upon the 16th day of October 1888, Amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883
Instruments of Telegraphs.
I, FREDERICK HERBERT WILLIAM HIGGINS of 17 Cornhill in the City of London
Electrical Engineer do hereby declare the nature of this invention to be as
follows:-
In printing telegraph instruments as at present constructed it is usual to print the
message lengthwise upon a narrow strip of paper or "tape."
The object of this invention is to enable the message to be printed in lines upon a
broad strip or sheet of paper like that used for an ordinary type writer. The paper
is led over an india rubber or other elastic roller or pad carried by swinging levers
which also carry and are actuated by the armature of the printing magnet. The type
wheel can slide along its axis (which is parallel to the elastic roller) but cannot turn
upon it. The type wheel is traversed along its axis across the width of the machine
by means of arms embracing it which are carried by a nut upon a quick threaded
screw which is rotated by a ratchet actuated by the printing lever. The nut also
carries the inking roller. The axis of the type wheel is caused to revolve by means
of a ratchet actuated by the armature of another electro-magnet in the usual way.
Every time the printing operation has taken place the quick threaded screw is turned
through a part of a revolution by its ratchet and the type wheel is advanced the
necessary space to allow the next letter to be printed the type wheel is then revolved
by its magnet and armature until it arrives at the letter next to be printed and the
current is then again passed through the printing magnet, attracting its armature and
bringing the paper against the type wheel.
The ratchet for driving the quick threaded screw is mounted at one end of a lever
pivotted at its middle to the frame of the machine, whilst its other end has in it a
curved slot embracing a pin upon the printing lever so that each time the printing
lever is moved the rachet is raised and engages with the next tooth of the ratchet
wheel so that when the printing lever returns and the ratchet descends again it rotates
the quick threaded screw and so on.
The type wheel when a line is finished is caused to return to the beginning of the

page_text: next line by the quick threaded screw being turned in the reverse direction by a spiral
spring which has been wound up by it. A retaining ratchet is however provided so
that it cannot turn back until both the driving and retaining ratchets are released
simultaneously. This is done in the following manner :-
The retaining ratchet is pivotted to the frame of the machine and has an arm fixed
at right angles to it This arm is connected by a rod to an arm hinged at its upper
end to the printing lever its lower end being stationary except when the ratchet is
clearing the teeth of its ratchet wheel.
A lever stop pivoted at its middle to the frame of the machine is provided, and
when the middle of the above mentioned arm on the printing lever comes against
this stop and is arrested its upper end being still carried on by the printing lever it
follows that its lower end is moved backwards thereby lifting the retaining ratchet
out of gear and the printing lever having raised the other ratchet the quick threaded
screw is free to be turned back by the spring and the type wheel is thereby brought
back to the beginning of the line. The above mentioned lever stop is usually kept
out of operation by a spring but the axis of the type wheel has upon it a pin which
once in every revolution comes against the tail end of the lever stop thereby bringing
the stop into the path of the arm on the printing lever so that if the printing lever is
swung at any time when the type wheel is at this point (which may be called the
zero point) the ratchets are released as above described and the type wheel is brought
back to the beginning of a line. If on the other hand the type wheel is turned from
the zero point before the printing lever is swung the type wheel will continue to
advance along the line.
The lever stop also actuates the paper feeding mechanism in the following
way
The paper passes over a roller pivotted to the frame of the machine, and claws are
provided pressing against the roller. During the printing of a line both roller and
claws are stationary but when the line is finished a swinging lever is brought by the
stop mechanism between the tail of a lever attached to the claw and a pin upon the
printing lever, so that if the printing lever is swung when the type wheel is at zero
it carries with it the tail end of the claw and thereby turns the roller and feeds the
paper a sufficient width for the next line.
In order to allow of spaces being left between successive words it is necessary to
be able to prevent the paper from coming into contact with the type wheel when the
printing lever is swung. For this purpose the pin on the axis of the type wheel is
prolonged to the other side of the axis and is bent slightly downwards, so that when
the type wheel is turned half a step beyond zero that is to say when the type wheel
armature is attracted and held by its magnet the first time after the type wheel has
passed zero the pin upon the printing lever comes against the prolongation of the pin
on the axis of the type wheel and is stopped by it.
Again when the type wheel is at zero and the printing lever is swung
the
paper is
similarly prevented from touching the type wheel by reason of the pin on the printing
lever coming against the stop.
A pin may also be provided at the other end of the axis of the type wheel to effect
or assist in effecting the same purpose, in this case sufficient breadth is given to the
end of the pin to enable it to get in the way of a pin on the printing lever, when the
type wheel stands either at zero or half a step in advance of zero.
The mechanism above described can readily be adapted to that class of instruments
which are driven by a weight or spring.
Dated this 10th day of Fahnuwa 1007
CARPMAEL & Co.,
Agents for the Applicant.

page_text: Instruments of Telegraphs.
I, FREDERICK HERBERT WILLIAM HIGGINS of 17 Cornhill in the City of London,
Electrical Engineer, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement :-
In printing telegraph instruments as at present constructed it is usual to print the
message lengthwise upon a narrow strip of paper or "tape.”
The object of this invention is to enable the message to be printed in lines upon a
broad strip or sheet of paper like that used for an ordinary type-writer. This
proposition however is not broadly new but by my arrangements which I will proceed to
describe I do so more advantageously than heretofore more especially I provide convenient
means for setting the type wheel and the paper for commencing a new line at any time
when this may be desired. The paper is led over an india rubber or other elastic
roller or pad carried by swinging levers which also carry and are actuated by the
armature of the printing magnet. The type wheel can slide along its axis (which is
parallel to the elastic roller) but cannot turn upon it. The type wheel is traversed
along its axis across the width of the machine by means of arms embracing it which
are carried by a nut upon a quick threaded screw which is rotated by a ratchet
actuated by the printing lever. The nut also carries the inking roller. The axis of
the type wheel is caused to revolve by means of a ratchet actuated by the armature of
another electro-magnet in the usual way. Every time the printing operation has
taken place the quick threaded screw is turned through a part of a revolution by its
ratchet and the type wheel is advanced the necessary space to allow the next letter
to be printed the type wheel is then revolved by its magnet and armature until it
arrives at the letter next to be printed and the current is then again passed through
the printing magnet attracting its armature and bringing the the paper against the
type-wheel.
The ratchet for driving the quick threaded screw is mounted at one end of a lever
pivotted at its middle to the frame of the machine whilst its other end has in it a
curved slot embracing a pin upon the printing lever so that each time the printing
lever is moved the ratchet is raised and engages with the next tooth of the ratchet
wheel so that when the printing lever returns and the ratchet descends again it rotates
the quick threaded screw and so on.
The type wheel when a line is finished is caused to return to the beginning of the
next line by the quick threaded screw being turned in the reverse direction by a spiral
spring which has been wound up by it. A retaining ratchet is however provided so
that it cannot turn back until both the driving and retaining ratchets are released
simultaneously. This is done in the following manner :-
The retaining ratchet is pivotted to the frame of the machine and has an arm fixed
at right angles to it. This arm is connected by a rod to an arm hinged at its upper
end to the printing lever its lower end being stationary except when the ratchet is
clearing the teeth of its ratchet wheel.
A lever stop pivoted at its middle to the frame of the machine is provided, and

page_text: when the middle of the above mentioned arm on the printing lever comes against
this stop and is arrested its upper end being still carried on by the printing lever it
follows that its lower end is moved backwards thereby lifting the retaining ratchet
out of gear and the printing lever having raised the other ratchet the quick threaded
screw is free to be turned back by the spring and the type wheel is thereby brought
back to the beginning of the line. The above mentioned lever stop is usually kept
out of operation by a spring but the axis of the type wheel has upon it a pin which
once in every revolution comes against the tail end of the lever stop thereby bringing
the stop into the path of the arm on the printing lever so that if the printing lever
is swung at any time when the type wheel is at this point (which may be called the
zero point) the ratchets are released as above described and the type wheel is brought
back to the beginning of a line. If on the other hand the type wheel is turned from
the zero point before the printing lever is swung the type wheel will continue to
advance along the line.
The lever stop also actuates the paper feeding mechanism in the following way.
The paper passes over a roller pivotted to the frame of the machine, and claws are
provided pressing against the roller. During the printing of a line both roller and
claws are stationary but when the line is finished a swinging lever is brought by the
stop mechanism between the tail of a lever attached to the claw and a pin upon the
printing lever, so that if the printing lever is swung when the type wheel is at zero
it carries with it the tail end of the claw and thereby turns the roller and feeds the
paper a sufficient width for the next line.
In order to allow of spaces being left between successive words it is necessary to be able
to prevent the paper from coming into contact with the type wheel when the printing
lever is swung. For this purpose the pin on the axis of the type wheel is prolonged
to the other side of the axis and is bent slightly downwards so that when the type
wheel is turned half a step beyond zero that is to say when the type wheel armature
is attracted and held by its magnet the first time after the type wheel has passed zero
the pin upon the printing lever comes against the prolongation of the pin on the axis
of the type wheel and is stopped by it.
Again when the type wheel is at zero and the printing lever is swung the paper is
similarly prevented from touching the type wheel by reason of the pin on the printing
lever coming against the stop.
A pin may also be provided at the other end of the axis of the type wheel to effect
or assist in effecting the same purpose; in this ense sufficient breadth is given to the
end of the pin to enable it to get in the way of a pin on the printing lever, when
the type wheel stands either at zero or half a step in advance of zero.
The mechanism above described can readily be adapted to that class of instruments
which are driven by a weight or spring.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.

page_text: required are brought in succession into the printing position. F is a screw which
effects the movement of the type-wheel step by step along its axis as the printing
progresses it carries a nut and a fork Fixed to the nut embraces the type-
wheel E. The nur is guided and prevented from turning by the forked arm F³ fixed
to it; the arms of the fork terminate in small rollers which bear one on either side
of a fixed bar forming part of the frame. F is a standard fixed upon the nut F ;
arms are jointed to its upper end and these carry the inking roller G. H is the
printing magnet its armature is carried by arms on the axis I which also carries
the printing lever frame K. K' is an elastic pad on this frame, the paper passes in
the manner indicated in figure 2 between the face of this pad and wires fixed across the
lever frame. When the magnet H attracts its armature the paper (with certain
exceptions already referred to) is brought into contact with the type-wheel and
printed.
By this
There is a pin in the side of the type-wheel printing-lezer which engages with a
slot in a lever L which has its pivot at ; it has jointed to it a driving pawl [2.
When the printing lever advances it lifts the pawl IP and causes it to pass over the
teeth of the ratchet M. which is fixed upon the screw F. When the printing lever
returns the pawl engages with the teeth and the ratchet is rotated a step.
means the type-wheel is traversed along its axis D. N is a retaining pawl and N* is
its spring this pawl holds the ratchet wheel M whilst the pawl 1 is lifted. The
screw I carries at its end a pinion and this gears with a spur wheel F° and by
turning it winds up the coiled spring F'. This spring serves to bring the type wheel
back to the commencement of the line whenever the pawi N is lifted, and this is
effected by the gear shown in figure 4. The axis D of the type-wheel carries a pin D2,
and this pin, once in each rotation of the type-wheel, operates against an incline upon
the piece O. This piece turns upon a vertical pivot at 0. The pin operates to
move the end 02 with which it comes in contact outwards or towards the adjacent
end of the instrument, whilst the other end 03 at the same time moves inwards, the
pin serving to overcome a light spring O with which this piece is provided. Pisa
lever jointed at its upper end to the printing frame K, and a horizontal link Q connects
its lower end with the tail N of the retaining pawl N. There is also a pin Q' on the
link Qagainst which a tail on the pawl lies.
Ordinarily the to and fro movement of the printing frame does not influence the
pawls, but when the pin D² on the axis D comes to the position in which it is shown
in Figure and displaces the piece then, if at this moment the printing frame K
advances, it brings the lever P' into contact with the end 03 of the piece 0 the end 03
then forms a fulcrum about which the lever P turns. The lever moves the link Q to
the right, thereby holding both the pawls 12 and N away from the teeth of the
ratchet and the spring F7 then takes the type wheel back to its starting point.
D3D3 are pins on the axis D which prevent the printing lever advancing sufficiently
to bring the paper into contact with the type-wheel when the releasing operation just
described takes place. One of these pins also stops the advance of the printing frame
when the type-wheel is at the zero position.
The sheet of paper is laid in the manner indicated in figure 2 up from the printing
pad K' over a metallic roller R against which the propelling or paper driving pawls S,
seen in figure 4, work. Above the propelling pawls S are retaining pawls T T which
serve simply to prevent the paper being drawn back when the propelling pawls S
retire. The propelling pawls S beneath which the paper passes, are carried by levers S¹
which are movable about the axis of the roller R. One of the levers S has upon it
an arm S² from which the roller receives movement at the proper time for feeding
the paper forward, that is to say, when the type-wheel is released and allowed to go
back to the commencement of a line. At this time the pin K2 upon the printing frame
strikes against a filling piece or pusher U and this in turn abuts upon the arm S² of
the lever carrying the pawl S so that, when the printing frame advances it moves the
arm and the pawl S and so it rotates the roller one step carrying forward the paper,
which is held between the roller and the pawl.

page_text: Springs hold the pawls S in contact with the paper and projections on the printing
frame cause the pawl levers to retire when the printing frame falls back.
This filling piece or pusher U is jointed to the printing frame by means of the
horizontal pivot or pin U¹ U is an arm projecting out from the rear of the pusher
or filling piece U, and this arm is embraced by a fork O fixed to the piece O so that
when the piece O is moved by the pin D2 on the axis D to liberate the type-wheel, as
already described, it also places the filling piece or pusher U between the pin K2 and
the arm and consequently the pawl, by which the paper is fed forward, receives the
movement required when the printing frame advances.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed 1 declare that what I claim is
1. In an electric printing instrument the means-described for traversing the type
wheel along the line to be printed; by a nut and a screw turned step by step by the
speration of the printing magnet and it the end-of-the-line brought back by a spring
ns-herein-set forth.
7. In an electric printing instrument the means described by which the paper is
fed forward type-wheel is caused to return at the end of each line; by a pin carried round
with the type wheel and when suitably placed so operating as to enable the printing
magnet to lift a retaining pawl as herein set forth.
2. In an electric printing instrument the means described by which the paper is
fed forward at the end of each line; by a pin carried round with the type-wheel and
when suitably placed so operating as to enable the printing magnet to move the paper
driving pawl as herein set forth.
43. Electric printing apparatus substantially as described and represented by the
annexed drawings.
TYL 341
1007

page_text: Date of Application, 10th Feb., 1887
Complete Left, 9th Nov., 1887
Complete Accepted, 9th Dec., 1887
PROVISIONAL SPECIFICATION.
Improvements in Printing Instruments suitable for the Receiving
Instruments of Telegraphs.
I, FREDERICK HERBERT WILLIAM HIGGINS of 17 Cornhill in the City of London,
Electrical Engineer do hereby declare the nature of this invention to be as
follows:-
"
In printing telegraph instruments as at present constructed it is usual to print the
message lengthwise upon a narrow strip of
paper or tape."
The object of this invention is to enable the message to be printed in lines upon a
broad strip or sheet of paper like that used for an ordinary type writer. The paper
is led over an india rubber or other clastic roller or pad carried by swinging levers
which also carry and are actuated by the armature of the printing magnet. The type
wheel can slide along its axis (which is parallel to the elastic roller) but cannot turn
upon it. The type wheel is traversed along its axis across the width of the machine
by means of arms embracing it which are carried by a nut upon a quick threaded
screw which is rotated by a ratchet actuated by the printing lever. The nut also
carries the inking roller. The axis of the type wheel is caused to revolve by means
of a ratchet actuated by the armature of another electro-magnet in the usual way.
Every time the printing operation has taken place the quick threaded screw is turned
through a part of a revolution by its ratchet and the type wheel is advanced the
necessary space to allow the next letter to be printed the type wheel is then revolved
by its magnet and armature until it arrives at the letter next to be printed and the
current is then again passed through the printing magnet, attracting its armature and
bringing the paper against the type wheel.
The ratchet for driving the quick threaded screw is mounted at one end of a lever
pivotted at its middle to the frame of the machine, whilst its other end has in it a
curved slot embracing a pin upon the printing lever so that each time the printing
lever is moved the rachet is raised and engages with the next tooth of the ratchet
wheel so that when the printing lever returns and the ratchet descends again it rotates
the quick threaded screw and so on.
The type wheel when a line is finished is caused to return to the beginning of the

page_text: next line by the quick threaded screw being turned in the reverse direction by a spiral
spring which has been wound up by it. A retaining ratchet is however provided so
that it cannot turn back until both the driving and retaining ratchets are released
simultaneously. This is done in the following manner :-
The retaining ratchet is pivotted to the frame of the machine and has an arm fixed
at right angles to it. This arm is connected by a rod to an arm binged at its upper
end to the printing lever its lower end being stationary except when the ratchet is
clearing the teeth of its ratchet wheel.
A lever stop pivoted at its middle to the frame of the machine is provided, and
when the middle of the above mentioned arm on the printing lever comes against
this stop and is arrested its upper end being still carried on by the printing lever it
follows that its lower end is moved backwards thereby lifting the retaining ratchet
oui of gear and the printing lever having raised the other ratchet the quick threaded
screw is free to be turned back by the spring and the type wheel is thereby brought
back to the beginning of the line. The above mentioned lever stop is usually kept
out of operation by a spring but the axis of the type wheel has upon it a pin which
once in every revolution comes against the tail end of the lever stop thereby bringing
the stop into the path of the arm on the printing lever so that if the printing lever is
swung at any time when the type wheel is at this point (which may be called the
zero point) the ratchets are released as above described and the type wheel is brought
back to the beginning of a line. If on the other hand the type wheel is turned from
the zero point before the printing lever is swung the type wheel will continue to
advance along the line.
The lever stop also actuates the paper feeding mechanism in the following
way :-
The paper passes over a roller pivotted to the frame of the machine, and claws are
provided pressing against the roller. During the printing of a line both roller and
claws are stationary but when the line is finished a swinging lever is brought by the
stop mechanism between the tail of a lever attached to the claw and a pin upon the
printing lever, so that if the printing lever is swung when the type wheel is at zero
it carries with it the tail end of the claw and thereby turns the roller and feeds the
paper a sufficient width for the next line.
In order to allow of spaces being left between successive words it is necessary to
be able to prevent the paper from coming into contact with the type wheel when the
printing lever is swung. For this purpose the pin on the axis of the type wheel is
prolonged to the other side of the axis and is bent slightly downwards, so that when
the type wheel is turned half a step beyond zero that is to say when the type wheel
armature is attracted and held by its magnet the first time after the type wheel has
passed zero the pin upon the printing lever comes against the prolongation of the pin
on the axis of the type wheel and is stopped by it.
Again when the type wheel is at zero and the printing lever is swung the paper is
similarly prevented from touching the type wheel by reason of the pin on the printing
lever coming against the stop.
A pin may also be provided at the other end of the axis of the type wheel to effect
or assist in effecting the same purpose, in this case sufficient breadth is given to the
end of the pin to enable it to get in the way of a pin on the printing lever, when the
type wheel stands either at zero or half a step in advance of zero.
The mechanism above described can readily be adapted to that class of instruments
which are driven by a weight or spring.
Dated this 10th day of Rohmane 1007
CARPMAEL & Co.,
Agents for the Applicant.

page_text: Improvements in Printing Instruments suitable for the Receiving
Instruments of Telegraphs.
I, FREDERICK HERBERT WILLIAM HIGGINS of 17 Cornhill in the City of London,
Electrical Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement :—
In printing telegraph instruments as at present constructed it is usual to print the
message lengthwise upon a narrow strip of paper or "tape."
The object of this invention is to enable the message to be printed in lines upon a
broad strip or sheet of paper like that used for an ordinary type-writer. The paper
is led over an india rubber or other clastic roller or pad carried by swinging levers
which also carry and are actuated by the armature of the printing magnet. The type
wheel can slide along its axis (which is parallel to the clastic roller) but cannot turn
upon it. The type wheel is traversed along its axis across the width of the machine
by means of arms embracing it which are carried by a nut upon a quick threaded
screw which is rotated by a ratchet actuated by the printing lever. The nut also
carries the inking roller. The axis of the type wheel is caused to revolve by means
of a ratchet actuated by the armature of another electro-magnet in the usual way.
Every time the printing operation has taken place the quick threaded screw is turned
through a part of a revolution by its ratchet and the type wheel is advanced the
necessary space to allow the next letter to be printed the type wheel is then revolved
by its magnet and armature until it arrives at the letter next to be printed and the
current is then again passed through the printing magnet attracting its armature and
bringing the paper against the type-wheel.
The ratchet for driving the quick threaded screw is mounted at one end of a lever
pivotted at its middle to the frame of the machine whilst its other end has in it a
curved slot embracing a pin upon the printing lever so that each time the printing
lever is moved the ratchet is raised and engages with the next tooth of the ratchet
wheel so that when the printing lever returns and the ratchet descends again it rotates
the quick threaded screw and so on.
The type wheel when a line is finished is caused to return to the beginning of the
next line by the quick threaded screw being turned in the reverse direction by a spiral
spring which has been wound up by it. A retaining ratchet is however provided so
that it cannot turn back until both the driving and retaining ratchets are released
simultaneously. This is done in the following manner :-
The retaining ratchet is pivotted to the frame of the machine and has an arm fixed
at right angles to it. This arm is connected by a rod to an arm hinged at its upper
end to the printing lever its lower end being stationary except when the ratchet is
clearing the teeth of its ratchet wheel.
A lever stop pivoted at its middle to the frame of the machine is provided, and

page_text: when the middle of the above mentioned arm on the printing lever comes against
this stop and is arrested its upper end being still carried on by the printing lever it
follows that its lower end is moved backwards thereby lifting the retaining ratchet
out of gear and the printing lever having raised the other ratchet the quick threaded
screw is free to be turned back by the spring and the type wheel is thereby brought
back to the beginning of the line. The above mentioned lever stop is usually kept
out of operation by a spring but the axis of the type wheel has upon it a pin which
once in every revolution comes against the tail end of the lever stop thereby bringing
the stop into the path of the arm on the printing lever so that if the printing lever
is swung at any time when the type wheel is at this point (which may be called the
zero point) the ratchets are released as above described and the type wheel is brought
back to the beginning of a line. If on the other hand the type wheel is turned from
the zero point before the printing lever is swung the type wheel will continue to
advance along the line.
The lever stop also actuates the paper feeding mechanism in the following way.
The paper passes over a roller pivotted to the frame of the machine, and claws are
provided pressing against the roller. During the printing of a line both roller and
claws are stationary but when the line is finished a swinging lever is brought by the
stop mechanism between the tail of a lever attached to the claw and a pin upon the
printing lever, so that if the printing lever is swung when the type wheel is at zero
it carries with it the tail end of the claw and thereby turns the roller and feeds the
paper a sufficient width for the next line.
In order to allow of spaces being left hetween successive word sit is necessary to be able
to prevent the paper from coming into contact with the type wheel when the printing
lever is swung. For this purpose the pin on the axis of the type wheel is prolonged
to the other side of the axis and is bent slightly downwards so that when the type
wheel is turned half a step beyond zero that is to say when the type wheel armature
is attracted and held by its magnet the first time after the type wheel has passed zero
the pin upon the printing lever comes against the prolongation of the pin on the axis
of the type wheel and is stopped by it.
Again when the type wheel is at zero and the printing lever is swung the paper is
similarly prevented from touching the type wheel by reason of the pin on the printing
lever coming against the stop.
A pin may also be provided at the other end of the axis of the type wheel to effect
or assist in effecting the same purpose; in this case sufficient breadth is given to the
end of the pin to enable it to get in the way of a pin on the printing lever, when
the type wheel stands either at zero or half a step in advance of zero.
The mechanism above described can readily be adapted to that class of instruments
which are driven by a weight or spring.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan of the machine.
Figure 2 is an end elevation.
Figure 3 is a back view of the printing lever and magnet.
Figure 4 is an elevation showing separately a portion of the apparatus.
Figure 5 is an elevation of the type wheel with its inking roller, and
Figure 6 shews to a larger scale parts of the apparatus shewn in figure 4.
A Å is the frame of the machine, it carries the electro magnet B. The armature
of this magnet is carried by an arm from the axis C. Another arm C¹ on the same
axis C carries the propelment anchor C which, operating upon ratchet teeth, rotates
the axis D of the type wheel in the manner usual in electric type printers. E is the
type wheel, it is able to slide along the axis D but is prevented from turning indepen-
dently of it by two rods D' D¹ passing through it.
These rods are carried by arms
from the axis D. By the rotation of the axis D in this way the type, as they are

page_text: required, are brought in succession into the printing position. F is a screw which
effects the movement of the type-wheel step by step along its axis as the printing
progresses it carries a nut F¹ and a fork F2 fixed to the nut embraces the type-
wheel E. The nut is guided and prevented from turning by the forked arm F³ fixed
to it; the arms of the fork terminate in small rollers which bear one on either side
of a fixed bar forming part of the frame. F is a standard fixed upon the nut F;
arms are jointed to its upper end and these carry the inking roller G. H is the
printing magnet; its armature is carried by arms on the axis I which also carries
the printing lever frame K. K¹ is an elastic pad on this frame, the paper passes in
the manner indicated in figure 2 between the face of this pad and wires fixed across the
lever frame. When the magnet H attracts its armature the paper (with certain
exceptions already referred to) is brought into contact with the type-wheel and
printed.
There is a pin in the side of the type-wheel which engages with a slot in a lever L
which has its pivot at L'; it has jointed to it a driving pawl I. When the printing
lever advances it lifts the pawl I and causes it to pass over the teeth of the ratchet M
which is fixed upon the screw F. When the printing lever returns the pawl engages
with the teeth and the ratchet is rotated a step. By this means the type-wheel is
traversed along its axis 1). N is a retaining pawl and N* is its spring ;—this paw]
holds the ratchet wheel M whilst the pawl L² is lifted. The screw F carries at its
end a pinion F and this gears with a spur wheel F and by turning it winds up the
coiled spring F. This spring serves to bring the type wheel back to the commence-
ment of the line whenever the pawl N is lifted, and this is effected by the gear shown
in figure 4. The axis D of the type-wheel carries a pin D2, and this pin, once in each
rotation of the type-wheel, operates against an incline upon the piece O. This piece O
turns upon a vertical pivot at 01. The pin operates to move the end 02 with which
it comes in contact outwards or towards the adjacent end of the instrument, whilst
the other end 03 at the same time moves inwards, the pin serving to overcome a light
spring 04 with which this piece is provided. P is a lever jointed at its upper end to
the printing frame K, and a horizontal link Q connects its lower end with the tail N1
of the retaining pawl N. There is also a pin Q on the link Q against which a tail on
the pawl L lies.
Ordinarily the to and fro movement of the printing frame does not influence the
pawls, but when the pin D2 on the axis I) comes to the position in which it is shown
in Figure 4 and displaces the piece O then, if at this moment the printing frame K
advances, it brings the lever P'into contact with the end 03 of the piece the end 03
then forms a fulcrum about which the lever P turns. The lever moves the link Q to
the right, thereby holding both the pawls L2 and N away from the teeth of the
ratchet and the spring F then takes the type wheel back to its starting point.
D2 D3 are pins on the axis D which prevent the printing lever advancing sufficiently
to bring the paper into contact with the type-wheel when the releasing operation just
described takes place. One of these pins also stops the advance of the printing fraine
when the type-wheel is at the zero position.
it
The sheet of paper is laid in the manner indicated in figure 2 up from the printing
pad Kover a metallic roller R against which the propelling or paper driving pawls S,
seen in figure 4, work. Above the propelling pawls S are retaining pawls T T which
serve simply to prevent the paper being drawn back when the propelling pawls S
retire. The propelling pawls S beneath which the paper passes, are carried by fevers S¹
which are movable about the axis of the roller R. One of the levers S' has upon
an arm S² from which the roller receives movement at the proper time for feeding
the paper forward, that is to say, when the type-wheel is released and allowed to go
back to the commencement of a line. At this time the pin K upon the printing frame
strikes against a filling piece or pusher U and this in turn abuts upon the arm S² of
the lever carrying the pawl S so that, when the printing frame advances it moves the
arm and the pawl S and so it rotates the roller one step carrying forward the paper,
which is held between the roller and the paw!.

page_text: Springs hold the pawls S in contact with the paper and projections on the printing
frame cause the pawl levers to retire when the printing frame falls back.
This filling piece or pusher U is jointed to the printing frame by means of the
horizontal pivot or pin U. U is an arm projecting out from the rear of the pusher
or filling piece U, and this arm is embraced by a fork 0 fixed to the piece O so that
when the piece O is moved by the pin D² on the axis D to liberate the type-wheel, as
already described, it also places the filling piece or pusher U between the pin K and
the arm S and consequently the pawl, by which the paper is fed forward, receives the
movement required when the printing frame advances.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
1. In an electric printing instrument the means described for traversing the type-
wheel along the line to be printed; by a nut and a screw turned step by step by the
operation of the printing magnet and at the end of the line brought back by a spring
as herein set forth.
2. In an electric printing instrument the means described by which the paper is
fed forward at the end of each line; by a pin carried round with the type wheel and
when suitably placed so operating as to enable the printing magnet to lift a retaining
pawl as herein set forth.
3. In an electric printing instrument the means described by which the paper is fed
forward at the end of each line; by a pin carried round with the type-wheel and when
suitably placed so operating as to enable the printing magnet to move the paper
driving pawl as herein set forth.
4. Electric printing apparatus substantially as described and represented by the
annexed drawings.