IMPROVEMENTS IN PRINTING TELEGRAPHS
Year: 1872

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
Lake, & Co., Patent Agents, Southampton Buildings, London,
for the Invention of "IMPROVEMENTS IN PRINTING TELEGRAPHS."-A
communication from abroad by George Baker Field and Elisha
Whittelsey Andrews, both of the City and State of New York,
United States of America.
PROVISIONAL SPECIFICATION left by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition,
on the 19th March 1872.
I, WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co.,
Patent Agents, Southampton Buildings, London, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN PRINTING TELEGRAPHS,"
a communication, to be as follows:-
This Invention relates to improvements in printing telegraphs with
two adjacent type wheels similar to that for which Letters Patent were
obtained bearing date the Twenty-fourth day of May, A.D. 1871,
No. 1400, and reference is hereby made thereto.

page_text: The present improvements are in the details of the construction of
the parts and the means for actuating the type wheels and effecting the
printing. In mounting the type wheels it is found preferable to dispense
with journals and support the shaft upon the pointed or conical ends of
screws passing through the frame and clamped, and to employ a hinged
link between the T lever and the part to be moved thereby instead of a
slot as in the lever u in the Specification of the said former Patent.
The inking roller is made of disks of woven cloth clamped between
heads as preferable to felt, because loose fibres and pieces do not come
off the same upon the types. The inking roller is mounted so as to
slide with the type wheels when they are moved.
The screw on the shaft that acts as a unison is separate from the type
wheels and attached by a pin, which pin also forms the stop for the
lever in the aforesaid former Specification, thereby facilitating the con-
struction and adjustment. The lever of the aforesaid Specification is
formed at the end with a fork, in which is the arm of the stop to
prevent the said arm 7 being thrown up too far by the momentum.
The feeding mechanism is made to act near the edges of the paper,
and consists of a dog acted upon by the printing lever and a holding
pawl or dog; the paper is moved during the upward movement of the
printing lever. The type wheel magnet or the impression magnet, or
both, are mounted upon yokes with rods and adjusting nuts to attach
the magnets to the bed and position the magnets correctly in relation
to the other parts. The shield that prevents an impression from the
type wheel not in use is made of a thin open three-sided spring plate
that facilitates the insertion of the paper.
The type wheels for machines adapted to some uses are divided into
sections between the letters, the portions removed allowing the sections
to be drawn together, hence making the same of less diameter; there-
fore the contracted wheel will be too small to impress the paper, but the
wheel that is expanded will give the impression. Sliding sleeves around
the shaft with taper ends actuated similarly to the type wheels in the said
former Specification are employed to expand the sections or to allow of
their contraction by springs.
In other instances the type wheels are each in one piece attached by
slots and screws to discs on the shaft, but the holes in the type wheels
aic larger than the shaft, and the looseness allows the type wheel not.

page_text: in action to be lifted by a spring, while the type wheel that is in action.
is made concentric to the shaft by slipping the said taper sleeve into its
central hole, and a taper locking bar prevents this type wheel from
turning around upon the sleeve.
It is preferable under some circumstances that in this class of
telegraphs with two adjacent type wheels the type wheels should be
moved by separate step-by-step motions, one type wheel being stationary
at the dash or zero point; this is accomplished by the present improve-
ments, and the operator at the sending station can bring into action at
will either of the type wheels.
There is one electro-magnet for the two type wheels, but instead of its
lever carrying the pawls as usual there are independent levers one on
each side of the armature lever and moving on the same lever, and there
is a transverse bolt in the armature lever that when slipped in one
direction unlocks one of these levers and locks the other and the reverse,
and to these two levers, the pawls, and other parts of the step-by-step
motion are attached, hence if the movement of this transverse bolt is
under the control of the operator at the distant station he can bring
either type wheel into action at pleasure. It is necessary that both type
wheels be first brought to the dash or zero point so as not to be out of
unison when the bolt is changed, and this bolt in some instances is
moved by power derived from the impression lever or its magnet acting
through levers upon said bolt to move it endwise against the action of
a spring, and then a. latch holds said bolt, and when the bolt is to be
moved the other way this latch is lifted.
In other instances an independant electro-magnet is employed to give
motion to this transverse bolt, and this electro-magnet is brought into
action only when the two type wheels are at the zero point and the
current is directed through that electro-magnet at that point in con-
sequence of the position of arms that revolve with the said type wheels.
When there are several printing telegraphs at different stations all in
the same electric circuit the message will be printed at each station.
I arrange these machines in some instances so that the operator
sending the message can select the station to which the message is sent
and lock out of action all the other stations. This object is effected by
placing on the impression lever a stop with a forked end, and upon the
type wheel shaft a notched disc, such as the disc 1, Figure 4, of the said

page_text: •
former Specification, and moving this disc upon the shaft by a T lever'
and pins. The parts are positioned so that a slight movement is allowed
the printing lever when the edge of the disc is in the fork, but not
enough to give the impression, and these discs are positioned with the
notches at different points in the different instruments, hence when the
type wheels have been turned around so that the notch at the station
to be brought into action is over its stop, the impression lever being
moved slides the disc away from over the stop and allows that type
wheel to be impressed from while all the type wheels in the circuit
are not in action because their discs are still in the notches of their
respective stops. The type wheel is moved by an armature lever and
pawl with a step-by-step motion, and under some circumstances it is
important that the same armature should effect the feeding of the paper;
this is accomplished by a polarized stop that limits the movement of
the armature to one tooth at a time. When this stop is drawn aside by
reversing the polarity of the current the armature is allowed an increased
movement and effects the printing; the pawl that moves the type wheel
is drawn aside by a stationary stop so as not to take more than one
tooth at a time on the type wheel ratchet, and the reverse movement
of the armature feeds the paper by a pawl that is previously lifted over
a spring stop as the impression is given; this spring stop holds the pawl
out of contact with the paper whilst the usual pulsations take place in
moving the type wheel.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Robert Lake in the Great Seal Patent
Office on the 18th September 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, and Co., Patent Agents,
Southampton Buildings, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of March, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Robert Lake, Her special licence
that I, the said William Robert Lake, my executors, administrators, and
assigns, or such others as I, the said William Robert Lake, my exccutors,
'

page_text: administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN PRINTING
TELEGRAPHS," a communication to me from abroad by George Baker Field
and Elisha Whittelsey Andrews, both of the City and State of New
York, United States of America, upon the condition (amongst others)
that I, the said William Robert Lake, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said William Robert Lake, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being made to the Drawings hereto
annexed, and to the letters and figures marked thereon (that is to
say) —
This telegraph is particularly adapted to telegraphing the changes in
the market value of stocks and articles of commerce from the exchange
or center of business to various business offices or centers of trade in
large cities, but it may be used for other telegraphic operations.
In arranging this system of telegraphs a wire leads from the principal
business center to the first instrument through the magnet thereof to
the next instrument, and so on, through any desired number of instru-
ments at different offices or stations, and back to the point of beginning
cither direct or through the earth circuit, and where very many instru-
ments are to be worked from one main or central station, relay magnets
and additional batteries may be used in a way well understood by
telegraphers.
It is generally preferable that two lines of wires be employed, one
passing through the magnets that actuate the type wheels, the other
through the magnets that give the impression to print the communica-
tion, but each instrument may be provided with a permanent magnet
that acts as a switch to direct pulsations of positive polarity through

page_text: the type wheel magnets, and pulsations of negative polarity through the
printing magnets, or the reverse, as known to telegraphers, in which
case only one wire in the telegraph line will be required.
The present improvements relate principally to a telegraph instru-
ment having two type wheels, one with letters, the other with figures
and fractions, and the wheel to be operated is selected and the other
wheel simultaneously thrown out of action, thereby with one type wheel
the name of the stock or commodity is printed, and with the other type
wheel the value or price in figures and fractions is printed.
To accomplish this object the machine is constructed in the manner
best suited to the particular work to be performed. Thus in the Drawings
Fig. 1 is a plan, Fig. 2 is a vertical section, and Fig. 3 is an elevation
partially in section of the instrument in the form adapted especially to
reporting fluctuations in the stock market. Fig. 4 shows the type
wheels in section and constructed so that one is expanded for printing
from as represented in Fig. 5, and the other contracted as in Fig. 6, so
as not to touch the paper. Fig. 7 is a section of the type wheels, each
having a large central hole, so that one can be pressed up out of the
way of the paper while the other is concentric for printing. Fig. 8 is
an end view of these wheels, and Fig. 9 is a plan of the springs and
impression pad,
The instrument shown in section Fig. 10, sectional plan Fig. 11, and
in details Figs. 12, 13, & 14, is adapted to reporting market prices or
general information on sales of articles, &c., where it is most convenient
to allow the figure wheel to remain motionless, while the letter wheel
is being operated, or the reverse. Figs. 15 and 16 are separate views of
the type wheel in the instrument that is adapted to the use of banks,
or in communicating from a central station to one bank or office and
preventing any other banks or offices in the line knowing what is being
sent. Fig. 17 is an elevation, Fig. 18 is a plan, and Figs. 19, 20,
and 21 are details of this printing telegraph in a form adapted to private
lines, such as between a manufactory and the office.
In Figs. 1, 2, and 3, the magnet / operates the printing lever f¹ that'
swings on the fulcrum f³ and carries the impression pad at t³. The
strip of paper passes beneath the spring shield p² that is made of thin
sheet metal, in the form of three sides of a square. The type wheels l, m,
are moved endwise of the shaft c, so that when the wheel m is being
printed from there will not be an impression from the wheel 1, because

page_text: 2'
the shield p² is between that and the paper.. The shaft c is sustained
in the screw bearings e, which are clamped by the screws k. The
strip of paper is drawn along between each impression by the dog d³,
moved over the roller c³ by the pin e* and lever e³; the pawl eª and
finger prevent the paper drawing back. The type wheels l, m, slip
on the shaft c, they are guided by the rod in the fork q, and moved
by the link o, T shaped lever n, and pin 2 or 3 that are upon the
printing lever f. If the shaft c and type wheels are turned around
until one end of the lever n is over the pin 2, and then the printing lever
is moved, that pin 2 will shift the type wheels one way, or if the type
wheels are moved around one notch further of the ratchet wheel f
the lever will be over the pin 3, and the movement of the printing
lever will shift the type wheels the other way. The disk 12 on
the shaft c and the block on the printing lever få prevent motion,
except at the time when a notch in the disk is adjacent to said
block, this block / being at either one side or the other of the disk
12 according to which type wheel is being printed from.. The type
wheels and their shaft are revolved around progressively by a step-by-
step motion, the magnet i, armature h, lever g, and ratchet wheel f
being shown in Figs. 1, 2, & 3, for this purpose. It is remarked that
the strip of paper is wound upon, a reel that is upon a shaft that
rests in the bearings m³ on the arms that rise from the cross piece u
that is between the frames b, b, Figs. 1, 2, and 3, and the types are
inked by a roller 7° made of disks of woven cloth clamped between
heads upon the shafts that is held by the arms t. It is necessary
occasionally to bring all the type wheels to the same starting point,
so that all may be in unison. This is done by sending pulsations of
electricity through the type wheel magnets, sufficient to turn the type
wheels around twice or more, and in so doing the screw v, Figs. 1, 3,
4, 7, 15, moves the lever a² along until it is in the path of the stop w,
and that prevents further movement of the type wheels, although
pulsations of electricity are continued sufficient to bring up any type
wheels that may have been out of unison. When the printing levers
are moved the levers a² of all the machines are lifted out of the screw o,
and drawn back by springs, so as to free the type wheels. The fork 63
is shown in Figs. 1, 2, and 3 for lifting the levers a². The screw v
is secured to the shaft c by the stop pin w. It is remarked that this
unison is not brought into action except designedly, because in ordinary
use the type wheels are never revolved more than twice before an

page_text: impression is made and the unison returned to the starting point in its
and screws 5 serve to support and adjust the
screw. The yokes
magnets, Figs. 2 and 3.
Upon reference to Figs. 4, 5, and 6 it will be seen that the type wheels
are sometimes constructed as contractable segments c, d, connected to
disks e upon the shaft a, and these segments are expanded by the tapering
end of the sliding sleeve i acted upon by the pin s or tand T shaped
lever o and link n. The rods serve as guides, and the wheel that is not
_expanded, so as not to be printed from, is contracted by a rubber band 6
around its hub. Fig. 6 shows the wheel contracted, and Fig. 5 the
same expanded; the wheel c, Fig. 4, is expanded for use. The same effect
is produced by using whole type wheels with large central openings,
so that the wheel d, Fig. 7, that is not in use will be loose and lifted up
by the spring on the printing lever u, see Figs. 7, 8, & 9. The type
wheel c that is in use is kept concentric by the sleeve / that is slipped
The reverse
into its central opening by the lever p, link o, and pin 8.
movement is given by the pin t. The rods 3 and 4 guide the type wheels
and keep the one that is in use correctly in place. The type wheels
are connected to the disks e by screws and slots.
The device illustrated in Figs. 15 & 16 may be denominated a
locking-out device," the same being for preventing any but one
machine out of a number in the electric circuit receiving the message.
The frames b, shaft c, type wheel %, ratchet wheel f, unison a³, w, & v,
are similar to the devices before described, and the disk 12 and type
wheel are on a sleeve i that is moved by the link o, lever p, and pin
8 or t on the printing lever ƒ³. The fork m on the lever fª when the
disk 12 is over it, as in Fig. 15, prevents the pad * rising high enough
to give the impression, and the disk 12 can only be moved out of
that fork into the position of Fig. 16 when the notch of that disk is
at the right point, therefore if the disk of one machine is positioned
to the type wheel so that its notch is in line with letter A, that
disk alone will be moved and drawn out of its fork, and the printing
lever allowed to act and give the impression, and that machine can be
operated and its disk returned to its fork. Another machine with its
notch in line with letter C could then be brought into action, so that
at the sending station the operator knows at what letter the instru-
ment he wants to print upon can be brought into action, and manipulates
accordingly.

page_text: Other modes of bringing these machines into action might be adopted,
such as positioning the unison stop 4 in different positions in different
machines in relation to the letters of the type wheel, and making the
transmitting machine to start in harmony with the type wheel of the
machine that is to be operated. To operate one type wheel c and not
the other type wheel d, Figs. 10, 11, 12, the same character of printing
lever and magnet f' and the type wheel magnet e and its armature f³
are used, but instead of connecting the armature, direct to the lever that
operates the step-by-step ratchet movement, said armature is mounted
upon the lever k and shaft 1, upon which also are the levers c¹ and d' with
their pawls and stops to actuate the ratchet wheels f of the respective
type wheels d, c, and in the lever k is a bolt i that can be moved endwise.
When slipped into the lever d¹ the bolt i causes that lever to move with
the armature lever k and operates the figure wheel d, the letter wheel c
remaining inactive because its lever c¹ is unbolted. The reverse move-
ment of the bolt i causes the wheel c to be operated and the wheel d to
stand still. This bolt i may be moved by a magnet specially provided.
The arms 6 are shown for this purpose; they are polarized by induced
magnetism from the cores of the magnet f' and act upon the armature n³,
lever m, and bent lever o, to move the bolt i endwise into the lever d!,
but this can only be done when the notch in the disk n' is over the
arm 10 to allow of the required extent of motion. The pawls holds the
bolt, and when that pawl is raised the spring 3 draws the bolt out of
d and projects the other end into c'. The arm 8 is forced back by the
cam 7 each revolution of the wheel d, and acting through the lever 9
lifts the pawls, disconnecting the bolt i from d¹; hence to operate the
type wheel d more than one revolution it is necessary to energize the
printing magnet f' immediately after the cam 7 has raised the pawl s.
The lever u upon the printing lever g is acted upon by the cam m² at
the time the arms 10 are in the notches of the discs n¹ to throw the
lever m back to a normal position in case there is any magnetism
remaining in the arms 6 to attract the armature n². In Figs. 22, 23,
24, and 25 the type wheels c, d, are each operated by separate step-by-
step movements, but the bolt i is controlled electrically instead of
mechanically, as in Figs. 10, 11, 12, 13, & 14. Fig. 22 is a vertical
section of the instrument; Fig. 23 is a general plan, Fig. 24 is au
-inverted plan, and Fig. 25 is a plan of the locking magnets, bolt, and
levers. Upon the bed a are the frames b, b, sustaining a shaft that
carries the type wheels c and d. The lever c¹ is provided with the

page_text: ,
necessary pawls and stops to act upon the ratchet of the letter wheel c
and move the same with a step-by-step motion, and d¹ is the lever with
similar devices to form a step-by-step motion for the figure wheel d.
These step-by-step motions are the same as those given to the type
wheels c, d, of the instrument shown in Figs. 10, 11, 12, 13, & 14.
The levers c¹, d¹, move upon a fulcrum or shaft e, which is also the axis
for the lever fand armature of the electro-magnet g, designated hercin
the type wheel magnet. The bolt i slides in the lever f, and when moved
towards the lever d' by the spring 2 that end of the bolt i connects the
lever d¹ with f, and they move together and the lever c¹ is disconnected.
When the bolt i is moved the other way the lever d¹ is disconnected
from f, and the lever c¹ connected by the other end of i, and in order to
hold the bolt ia latch o is employed that springs into a notch in . A
lever o¹ beneath the end of the latch o extends upwards contiguous to a
cam 3 moving with the type wheel c, so that each revolution of c the
latch o is lifted and the bolt i drawn from c¹ by the spring 2. The
bolt is moved towards c¹ by the armature k of the locking magnet k¹.
The printing lever m moves upon the fulcrum 6 and carries the armature 7
of the printing magnet n.. The impression pad p, feeding clamp q, and
actuating cam slots 37 are of any usual character. The polarized circuit
changer swings upon the fulcrum 8 and is moved into contact with the
circuit screw connections 9 & 10 according to the polarity of the current
and directs the current either through the printing magnet or else
through the type wheel magnet. The spring circuit closers s and t are
near the type wheel shaft, and upon the sleeves or shafts of the respective
type wheels there are arms u with non-conducting pins projecting from
the sides and passing in their revolution between the ends of the circuit
closing springs or t respectively, and opening them break the circuit,
and these pins and arms are located so as to separate these springs 8, t,
when the type wheels arrive at the zero point. The line wires connect
with the binding screws 11 and 14.
The operation of this instrument is illustrated as follows:-Suppose
the letter wheel c at zero point, and the circuit springs & separated, and
the bolt i connecting and d', the pulsation of electricity entering by
10 goes by wire 12 to magnet g, thence by wire 13 to bed a, and by 81
and through 9, wire 15, and to the line screw 14; the pulsations there-
fore will act in the magnet g upon the step-by-step motion to set
the wheel d. When the polarity of the current is reversed to effect

page_text: the printing the same enters at 14, passes through wires 16 and 17,
springs t, wires 18 and 19, to the printing magnet n, thence by 20 to
bed a, and by 8, 7, and 10 to the line wire from 11. To operate the
letter wheel c it is necessary to move the wheel d to the zero point,
breaking the circuit at t, then reverse the pulsation, which then cannot
go by 16, 17, 18, 19, &c. as before because t is open, but it has to pass
through 21 to the locking magnet ¹, which throws the bolt i, unlocking
d and locking c¹, the pulsation then goes by 22, 19, through n, 20,
a, 8, r, 10 & 11. The latch o holds the bolt i, and upon reversing. the.
polarity of the current the letter wheel can be moved around by the
step-by-step motion and the printing done as before, but the pulsations
in the type wheel magnet pass from 11 through 12, g, 13, a, 8, r, thence
by 9 and 15 to 14. When the impression is made on the letter wheel c
the pulsation comes through 14, 16, 24, 8, 19, n, 20, a, 8, r, 10, to 11,
and if the letter wheel cis to be revolved more than once a reverse
pulsation must be made upon the arrival of c at the zero point, because.
the cam 3 has in its last step unlatched o and allowed the spring to
draw the bolt back from c¹. This pulsation as it cannot go through
either sort has to go through the magnet k¹, and by the armature k³
move and relock the bolt i to c¹. In order to prevent the armature k²
remaining in contact with k¹ by any residual magnetism the movement
of the armature is made, close the circuit between 32 and the insulated
screw 33 so that there is a connection made from 22 through 35, 33, 32,
to the bed a. The circuit at 32, 33, is again broken as the armature
is drawn back by the spring 30. A fine wire 36 between
vents the circuits being broken if the polarized switch
touch either 9 or. 10. The locking magnet k¹ might be operated by a
separate line wire, and either of the springs s or t may be employed
with the pin on the type wheel shaft for cutting out an electro-magnet
or compelling the circuit to pass through the same when the non-con-,
ducting pin intervenes between the springs.
and 20 pre-
should not
For communicating between an office and a factory or between one or
more banks or offices, the instrument Figs. 17 to 21 is in a convenient
form. The type wheel h, shown by dotted lines in Fig. 17, and fuly
lines Fig. 18, is moved around step by step by pulsations of electricity
through the electro-magnet a, a¹, acting upon the armature c, lever c¹,
and pawl plate m, pawl 1, and ratchet wheel i. There is a screw stop 6

page_text: Eighth. The type wheel and impression magnets sustained and
adjusted by the yoke h* and screws, Figs. 2 and 3, that pass up
through the bed of the machine, as set forth.
Ninth. The arms t, Figs. 1, 2, & 3; for the paper reel sustained upon
and above the cross bar that receives the arms of the ink roller, as set.
forth..
Tenth. The impression shield p², Fig. 1, made as an open three-sided
spring plate attached to the impression lever, as and for the purposes
set forth.
Eleventh. The type wheels, Figs. 4, 5, and 6, each divided into
sections and connected to the disk in combination with the sliding
sleeves i, i, for expanding the wheel or allowing of its being contracted
for the purposes and substantially as set forth.
Twelfth. The type wheels c, d, Figs. 7, 8, & 9, connected to the
disk e, but allowed to move laterally in combination with the sliding
sleeves, h, substantially as specified.
Thirteenth. The locking bar 4, and springs t, t¹, in combination with
the laterally moving type wheels, substantially as and for the purposes
set forth.,
Fourteenth. A locking mechanism, Figs. 15 and 16, actuated by the
movement of the printing lever for preventing an impression, in com-
bination with the type wheel and its actuating mechanism that controls
the movement of the said locking mechanism.
Fifteenth. A type wheel and unison mechanism in combination with a
locking and unlocking mechanism for preventing or allowing an im-
pression, Figs. 15 and 16, substantially as specified.
1
Sixteenth. The lever m, Figs. 10, 11, 12, 13, & 14, and armature n²,
contiguous to the lateral poles 6 of the printing magnet for actuating
the bolt i, in combination with the arms 10 and disks n', substantially as
) set forth.
Seventeenth. The disconnecting lever 8, Fig. 12, operated by the
cam 7 in combination with the lever m, armature n³, latch 8, bolt i, and
levers for the respective type wheels, substantially as set forth,
;

page_text: w, the printing rever 9,
in combination with the stop m², lever m, and armature n³, substantially
as set forth.
Nineteenth. Two type wheels actuated by separate levers and step-by-
step movements in combination with an actuating electro-magnet,
armature and bolt, Figs. 22, 23, 24, & 25, that locks either of the levers
with the actuating armature, substantially as set forth.
Twentieth. An electro-magnet, Figs. 22, 23, for operating the locking
bolt, in combination with the said levers, step-by-step movements, and
type wheels, substantially as set forth.
Twenty-first. The latch o, Figs. 22, 23, 25, for holding the bolt i
unlatched by the cam 3, upon the type wheel shaft, in combination
with the armature and levers to actuate the type wheels, substantially
as set forth.
Twenty-second. The circuit closing springs s or t, Figs. 22, 23,
separated by the non-conducting pin upon the type wheel shaft, in com-
bination with an electro-magnet for directing the pulsation through
that magnet when the pin is between the springs, substantially as
specified.
Twenty-third. The arrangement of circuit connections substantially
as set forth, Figs. 23, 24, for actuating either of three electro-magnets
in one main telegraph line for moving one of two type wheels and effecting
the printing, substantially as set forth.
Twenty-fourth. The bar p, and stops 5 and 6, Figs. 18, 19, & 20, to
regulate the extent of motion allowed to the armature c of an electro-
magnet, substantially as set forth.
Twenty-fifth. A type wheel, Figs. 17 and 18, rotated by a step-by-
step motion, and an impression pad moved simultaneously in combina-
tion with an electro-magnet and mechanism for regulating the extent of
motion of the armature for moving the type wheel or effecting the 3
impression, substantially as set forth.
Twenty-sixth. The yielding incline 10 and paper feeding pawl' o,
Figs. 17, 18, 21, brought into action by an increased movement of the
armature of an electro-magnet, substantially as set forth.

page_text: Twenty-seventh. An impression pad, Figs. 17 and 18, moved by a
spring to give the impression when the current is broken in an electro-
magnet in combination with a type wheel, substantially as set forth.
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Eleventh day of September, in
the year of our Lord One thousand eight hundred and seventy-
two.
Witness,
W. J. LOWE.
W. ROBT. LAKE. (L.S.)