Improvements in Type-writing Machines.
Year: 1896

page_text: Date of Application, 13th Feb., 1896-Accepted, 28th Mar., 1896
COMPLETE SPECIFICATION.
Improvements in Type-writing Machines.
I, NEAL LARKIN ANDERSON, of No. 206 High Street, in the City of Mont-
gomery, County of Montgomery, State of Alabama, United States of America,
Clergyman, 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 :-
My invention relates to certain new and useful improvements in type-writing
machines, and contemplates, particularly, novel means for returning the platen
carriage of the machine after it has been advanced from its initial position, this
return being accomplished either automatically when the carriage has advanced to
a predetermined position (as, for instance, the full end of the line), or manually at
the will of the operator, at any point in advance of that determined by the adjust-
ment of the automatic devices, and through the instrumentality, for instance, of an
auxiliary key. The invention also includes means for automatically turning une
platen to provide for the spacing of the lines; and, further, means for storing and
maintaining energy in the spring which gives momentum for the transverse move-
ment of the carriage.
In the accompanying drawings, illustrative of my invention,
Figure 1 represents a top plan view of a type-writing machine embodying my
improvements, certain parts of the machine, unnecessary to the understanding of
the present invention, being omitted;
Figure 2 represents, on a somewhat larger scale, a rear elevation of the machine,
partly in section and partly broken away, the carriage being shown in position to
begin its movement in printing a line;
Figure 3 represents a similar view, partly in section, showing the carriage on its
return movement after the line has been written;
Figure 4 represents a sectional elevation of the machine, on the line 4-4 of
Fig. 6, with the carriage in an intermediate position;
Figure 5 represents a detail plan view of the pinion which transmits return
movement to the carriage and shows the bearings for the pinion shaft;
Figure 6 represents a horizontal section on the line 6-6 of Fig. 3;
Figure 7 represents a section on the line 7-7 of Figs. 2 and 6;
Figure 8 represents a detached elevation of the power wheel, showing its
relation to the rack bar;
Figure 9 represents in detail a part of the mechanism for storing energy in the
carriage actuating spring when desired, or automatically during the return move-
nient of the carriage;
Figure 10 represents in side elevation the means for automatically effecting the
line spacing.
Similar letters of reference indicate similar parts throughout the several views.
For purposes of illustration, I have shown my invention as applied to the well-
known double case Remington machine, No. 2, and have omitted from the
drawings such parts of the machine as are not needed to illustrate my invention.
I desire it to be understood, however, that I do not limit myself to this particular
type of machine, as it will be obvious to those skilled in the art that the improve-
ments may be applied to other machines of the same general class.
Referring to the drawings, A represents the frame within which the keys a are
mounted of the usual character. A' represents the top plate of the frame, and
A the supporting and connecting uprights therefor. The rock shaft b, the dogs c,

page_text: and the tension spring in connection with the rocker bar 62, links 63 and universal
bar &, constitute the usual escapement for the rack bar e of the platen carriage C.
The rack bare is adapted to be tilted out of engagement with the dogs c.
A drum E mounted loosely upon an arbor, and provided with a flexible strap f
extending from the drum periphery to a projection from the carriage C, occupies
the position usually occupied by the spring actuating drum of the ordinary
Remington, No. 2, machine, and turns upon the shaft in the way the usual spring
drum turns, and in the same direction during the writing of a line. It is provided
with a hub such as is used on the usual main spring drum and on this hub turns the
usual ratchet e. The shaft is provided with a collar f2 to which one end of coil
spring is connected, the opposite end of said coil spring being connected to a
wheel F mounted loosely upon the collar f2. A washer is interposed between
the wheel F and the spring f³.
About one-half of the periphery of the wheel F is provided with cog teeth
having a pitch of one-tenth of an inch, and cut to intermesh with the teeth of a
pinion I mounted in readily removable bearings K attached to the frame of the
machine. The pinion L is adapted to mesh with a toothed bar G, said har being
provided with longitudinal slots g and being connected to the bearings of the
spacing ratchet e by means of headed screws g¹, entering the lugs g². One of these
screw's may conveniently serve as a set screw, to determine, in conjunction with the
adjacent scale, the desired adjustment of the margin used in writing. The flexible
band is connected to the periphery of the drum E at f. Near the periphery of
the wheel Fa pin h projects therefrom within the rim of the drum E. The drum E
is provided with a co-operating pivoted pin ', which is held in position by the
spring a so that the said pin h¹ normally occupies the position indicated in full lines
in Fig. 7.
To one of the uprights A2 of the frame is pivoted a bar 65 connected by a link b
with the lever arm of an auxiliary key c". The bar 65 connects with a rock arm b³
fulcrumed upon a stud 68 and terminating at its free end in the form of a brake-
sl.oe, having a hard rubber facing, adapted to bear upon the surface of the
wheel F; so that when the auxiliary key is depressed, for the purpose of releasing
the wheel F, as will be hereinafter described, the brake shoe simultaneously exerts
a light pressure upon said wheel, thereby serving as a brake upon it. To increase
the efficacy of the brake, the contact surface of the wheel may be slightly
roughened, as indicated by the hatching in Fig. 8. The brake shoe is normally
held out of engagement with the wheel by means of a spring 10.
At the free end of the bar 65 is mounted a crescent-shaped tripping arm c³, so
that, upon a downward movement of the bar 6, the tripping arm will move
toward the periphery of the drum E, and will thereby tilt the pin out of
engagement with the pin h, as indicated in Fig. 7.
I will now describe the manner in which the parts thus far enumerated operate.
While a line is being written, the drum E turns in the direction indicated by
the arrow in Fig. 2. This motion is communicated to the drum E, which is loose
on the shaft f, from the wheel F, by means of the pin coming into contact with
the pin h. As each key is struck, the drum E draws the carriage by means of
the band from the right to the left hand side of the type-writing machine step
by step. This movement is not interfered with by the pinion L, or the wheel F
from the fact that while the carriage is moving from right to left the milled out
portion of the wheel F is next to the pinion L. When the end of the line has
been reached, the last key struck (no matter which it may be) brings the trip
lever c, which projects downwardly from the bar 2, into contact with the pin h
thereby throwing said pin out of engagement with the pin h. The pin / is at once
carried beyond the pin h¹, and the druru is now free to move in a direction contrary
to its former path of revolution. This reverse movement of the drum E is caused
by the return of the carriage to the right hand side of the machine; for, at the
same moment that the pin his released from engagement with the pin h¹, the teeth
on the wheel F gear with the pinion L thereby reversing the direction of rotation

page_text: of said pinion and driving the carriage from the left to the right, i.e., to the
beginning of the line. As the right hand side of the machine is nearly reached,
the pin å again approaches the pin h¹, and when the return movement has been
fully accomplished the pinion L passes out of engagement with the wheel F and
the pin h comes into contact again with the pin h'.
Should the operator desire to return the carriage to the beginning of a new line
from any point in the line beyond, say, number 20 on the front scale of the type-
writing machine, and without going entirely to the end of the line, a stroke of the
auxiliary key will accomplish the purpose, by bringing the crescent-shaped
trip against the pin ', thus releasing the pin h and thereby disengaging the
wheel F from the drum E. The wheel F thus released continues its revolution,
bringing the cogs on its periphery into engagement with the pinion Land
returning the carriage to the left, as above described. The wheel F being
frequently released from engagement with the drum E when the carriage is at
some distance from the end of the line would have to describe an arc of consider-
able amplitude before its first cog came into engagement with the cogs on the
pinion L; consequently the first cog to come into engagement with the pinion L
would receive a sharp blow from the sudden impact. To obviate this, the brake-
shoe is brought against the roughened face of the wheel F at the same time
that the pin is released from engagement with the pin by means of the
auxiliary key, and thus serves as a gentle brake for the wheel F.
An additional safe-guard against the force of the sharp impact of the pin
against pin is provided by the pinion wheel n mounted to revolve freely in
bearings projecting from the end of the toothed bar G. The teeth on this pinion
wheel n are cut to gear with the teeth of the pinion L, and the pinion wheel n is
provided with the friction roller pawl n' held in place by the spring n2. If now
the auxiliary key has been struck, the resistance offered by the spring on the
friction roller pawl, serves as an additional check upon the momentum of the
wheel F, thereby permitting the pins and to come together without causing
any jar to the mechanism.
It will, of course, be understood that the pitch of the teeth on the spacer
ratchet e and on the toothed bar G is the same, each having a pitch of 32
(i.e., 10 teeth to the inch) and 65 teeth being provided for gear F when the
invention is embodied in a Remington, No. 2, machine. I also provide winding
gear for maintaining the power in the spring f³.
To this end, I employ a sprocket wheel R, to which is made fast a spring
barrel m². The spring m³ enclosed in this barrel is a long and flexible one and is
made fast at one end to the inner periphery of the barrel, and at the other end to
the winding shaft M, which passes through the barrel and is mounted to revolve
in the frame. The shaft M is provided with the ratchet m' fixed thereon, and
co-operating with the back-stop spring pawl m and a Geneva stop s prevents
over-winding. A sprocket chain v connects the sprocket wheel R with a smaller
sprocket wheel S fixed upon the shaft f, so that the tendency is constantly to wind
up the spring f³.
I preferably make the relative sizes of the sprocket wheels R and S as five
to one, so as to multiply the gearing ratio, thereby avoiding the necessity of
frequent winding up of the shaft M, and, for the same reason, I make the bevel
gear m' twice the diameter of the gear m³. The gear m¹ is rotated by means
of an operating handle m provided with a push pawl m engaging the
ratchet m*.
Upon the shaft and between the wheel S and wheel F is the cam wheel X.
This cam wheel is provided with a slot s2 cut in its face. The slot is cut in a
true circle concentric with the periphery of the wheel X, except at s³ where it
terminates in a cut out portion. To the frame of the machine is pivoted at s* a
bell-crank levert which passes through the top plate of the frame. On the lower
end of this bell-crank is a pin t', and on the inner side of the spacing ratchet e is
the trip pawl t having a back-stop pin t³.

page_text: The cam wheel X is loose upon the shaft f, and, in connection with the trip, is
designed to govern the transmission of tension to the spring f3. On its face, it is
provided with a spring pawl s engaging with a ratchet wheels fixed upon shaft f
and, on its periphery it is provided with cog teeth adapted to engage with a
pinion a fixed upon a staff a³. The staff as has also fixed upon it a worm wheel a
meshing with a worm a upon an arbor as, which arbor is provided with the usual
small fly or fan governor as, such as is used in music boxes to regulate the speed.
It will, of course, be understood that this mechanism is for the purpose of
regulating the speed when the winding mechanism is at work.
In putting together the parts of the machine, the spring is given sufficient
tension to write readily one line, and no more; and the power spring m³ is wound
up by giving several revolutions to the rod M by means of the operating handle m³,
and its connecting shaft and gearing. When the end of a line is reached, and the
carriage is thrown back automatically by the trip lever es coming into contact with
the pin (or at some other portion of the line by the striking of the paragraph
key) the carriage returns toward the beginning of the line, as hereinbefore set
forth, whereupon the trip 2 strikes the bell-crank lever t, thus releasing the pin t
from the notch s. Thereupon the spring m³, through the intermediacy of the
sprocket gearing, winds the spring 3. The spring t holds the lever t in the
slots in such manner that when the gear S is revolved once, the pin again
engages with the notch and stops the further action of the spring m³. In this
manner, the spring f³ is wound once with each complete revolution of the cam
wheel X, this being exactly sufficient to maintain the energy it had when the line
was begun. Thus, energy is stored for writing a new line, each time the carriage
returns, and for returning the carriage to the beginning of the following line.
While the line is being written, however, the stored power is held out of action.
by means of the cam wheel and bell-crank lever, and has nothing to do with the
writing of the line. Thus, all of the advantages of easy stroke and adjustment of
the stroke and power to suit the requirements of the individual writer are preserved
as in the present machine.
To avoid storing too much energy in the power spring m³, it is desirable that
the said spring be wound whenever a page is changed in the machine, this winding
operation taking but a moment. Should the page have been only partially
written, the Geneva stop s prevents overwinding. In gearing of the size
indicated in the drawings, about three revolutions of the rod P would be sufficient
for an entire page of twenty-seven lines written on the ordinary Remington
machine, No. 2. The number of revolutions necessary to wind the rod for
writing a page may be increased by changing the size of the gears m', m³.
The ratchet and pawl connection between the shaft fand cam wheel X, enables
the tension of the spring f3 to be adjusted with great nicety, so as to suit the
touch of different operators. Thus, if the operator desires to increase the tension
considerably, he simply trips the lever t, thus allowing the spring m³ to wind the
spring f one additional revolution. If, however, he simply desires a little more
power in the main spring, he trips the lever t, and at the same time checks the
movement of the storage mechanism by means of the fan governor; he then
turns the cam-wheel X to the left a quarter, third, half or any fraction of a
revolution, according to the additional strength of tension desired, and having
done so, releases the fan governor allowing the storage mechanism to put the
main spring under additional tension. It is obvious that, if the operator has
turned the cam-wheel X three-quarters of a revolution, the storage spring m³ can
wind the spring 3 only a quarter of a revolution before it is shut off by the slot
and lever t; if he has turned the wheel only a half of a revolution, the spring f
will be put under an additional tension of half a revolution by the storage
spring, &c., and since the tension once regulated, is maintained uniform, it is seen
that the operator can at any time adjust his machine to suit himself.
In order to effect the automatic turning of the carriage platen V, so as to space
for the succeeding line, I provide devices more particularly shown in Figs. 1, 2, 3,

page_text: 7 and 10 of the drawings. The platen V is provided with the customary ratchet s
and back stop pawl v, and is adapted to be operated manually, if desired, by the
lever Q and driving pawl v. In order to effect the spacing automatically,
however, an angular lever v8 is pivoted to the frame of the carriage at v" and is
provided with an overhanging arm v0. The free end of the lever Q extends in a.
plane transverse to the plane of the lever v and at an elevation slightly lower
than that of the arm v10. When the carriage returns to the beginning of a line,
the lower end of the lever v8 comes in contact with a stop or abutment 2, thereby
rocking the lever and turning the platen correspondingly to effect the desired
line spacing. In many instances, it is desirable to return the carriage to a desired
point in the line without spacing; as, for instance, when it is desired to make a
correction in a printed line. For this purpose, I employ an additional hand
lever Zadapted to rock upon the same rod upon which the hand lever Z is
mounted, and extending up from the platen V and thence downwardly, as shown,
until it almost comes into contact with the end J of the trip of the spacing rack
bar. It is obvious that when the operator wishes to return to the beginning of
the line without spacing the platen, he can effect that purpose by operating the
lever Z. Thus upon operating the lever Z, a pin upon said lever presses upon
the pawl and releases said pawl from the ratchet v, so that the return of the
carriage to the beginning of the line is not accompanied with an automatic spacing
of the platen, for the reason that the line space pawl being held out of engagement.
with the ratchet fails to revolve the platen. The lever Z therefore subserves the
function of a release key, and being provided with a hand lever enables the
operator to move the platen either to the right or left, as desired, without spacing
the line. On the other hand, if the operator desires to space the line without
returning the carriage to the initial position, the hand lever Q may be employed
for that purpose.
I may state generally that, so far as I am aware, it is broadly new in my
invention to employ the same spring (as f) both as the forwarding and automatic
returning motive power for the platen carriage. It is also broadly new to employ
a power wheel (as F) rotating in one and the same direction and driven by any
power whatever, said whee! during the first part of its rotation imparting a step
by step forward movement to the carriage, and, during the continuance of its said.
unidirectional rotation imparting a continuous return movement to the carriage.
These are the main characteristic features of my invention, and I desire that such
of my claims as set them forth generically be given a correspondingly broad.
interpretation.
By the expression "line of print" employed in the first three claims, I intend.
a line of any length, whether extending entirely across the page, or only part way
across, as, for instance, at the end of a paragraph. By "operated" as employed
in said claims, I intend to include the operation consequent upon striking the
special paragraph key, as well as that obtained automatically, as described.
It will, of course, he understood that the machine will be provided with the full
complement of finger keys (some of which only are shown in Fig. 1), and that the
usual bell or gong may be added, adapted to be automatically sounded by the
movement of the carriage in any convenient or suitable manner.
Having now particularly ascertained and described the nature of my said inven-.
tion, and in what manner the same is to be performed, 1 declare that what I
claim is:
1. In a type-writing machine, the combination with the platen carriage, of a
spring for propelling the carriage forwardly by a step by step motion, and rear-
wardly by a continuous motion, and reversing gear operated when the carriage
reaches the end of the line of print to permit the same propelling spring to return
the carriage to its proper position for printing the next line; substantially as
described.
2. In a type-writing machine, the combination with the platen carriage, of a

page_text: power wheel for propelling the carriage forwardly by a step by step motion, and
rearwardly by a continuous motion, means for imparting unidirectional rotation
to the power wheel, and reversing gear operated when the carriage reaches the
end of the line of print to permit the same power wheel to return the carriage to
its proper position for printing the next line; substantially as described.
3. In a type-writing machine, the combination with the platen carriage, of a
power wheel for propelling the carriage forwardly by a step by step motion, and
rearwardly by a continuous motion, means for imparting unidirectional rotation to
the power wheel, said power wheel being mediately coupled to the platen carriage
at the initial position of the carriage, a trip for disengaging the coupling, and
reversing gear operated when the gear carriage reaches the end of the line of print
to permit the same power wheel to return the carriage to its proper position for
printing the next line; substantially as described.
4. In a type-writing machine, the combination with the platen carriage, of a
power wheel, means for rotating said wheel in one and the same direction during
the advance and return of the carriage, a band wheel coupled thereto at the initial
position of the carriage and connected to the carriage by a flexible band, a trip for
disengaging the coupling, and gearing intermediate of the power wheel and
carriage adapted to intermesh and return the carriage upon the operation of the
trip; substantially as described.
5. In a type-writing machine, the combination with the platen carriage, of a
power wheel mediately coupled thereto at the initial position of the carriage,
means for rotating said wheel in one and the same direction during the advance
and return of the carriage, a trip for disengaging the coupling, said trip being
connected with the universal bar, and gearing intermediate of the power wheel
and carriage adapted to intermesh and return the carriage, upon the operation of
the trip; substantially as described.
6. In a type-writing machine, the combination with the platen carriage, of a
power wheel mediately coupled thereto at the initial position of the carriage, a
trip for disengaging the coupling, said trip being connected with the universal bar,
an auxiliary trip having an independent operating key, and gearing intermediate of
the power wheel and carriage adapted to intermesh and return the carriage upon
the operation of either trip; substantially as described.
7. In a type-writing machine, the combination with the platen carriage, of a
power wheel mediately coupled thereto at the initial position of the carriage,
means for rotating said wheel in one and the same direction during the advance
and return of the carriage, a trip for disengaging the coupling, gearing inter-
mediate of the power-wheel and carriage adapted to intermesh and return the
carriage, upon the operation of the trip, and auxiliary power-storage mechanism
for supplying to said power wheel with each return of the carriage energy
sufficient both to forward the carriage and reverse it; substantially as described.
8. In a type-writing machine, the combination with the platen carriage, of a
power wheel mediately coupled thereto, at the initial position of the carriage,
means for rotating said wheel in one and the same direction during the advance
and return of the carriage, a trip for disengaging the coupling, gearing inter-
mediate of the power-wheel and carriage adapted to intermesh and return the
carriage, upon the operation of the trip, and auxiliary power-storage mechanism
for supplying to said power wheel with each return of the carriage energy
sufficient both to forward the carriage and reverse it, and means for regulating
said supply so as to restore to the power-wheel on each return of the carriage its
original energy; substantially as described.
9. In a type-writing machine, the combination with the platen carriage, of a
power wheel mediately coupled thereto at the initial position of the carriage, a trip
for disengaging the coupling, gearing intermediate of the power-wheel and
carriage adapted to intermesh and return the carriage, up in the operation of the
trip, and auxiliary power-storage mechanism for supplying energy to said power
wheel with each return of the carriage, and means for regulating said supply so

page_text: as to restore to the power-wheel on each return of the carriage its original energy,
said means consisting of a cam wheel on the master shaft of the power wheel, a
stop engaging therewith, and a trip in the path of return movement of the
carriage; substantially as described.
10. In a type-writing machine, the combination with the platen carriage, of a
power wheel immediately coupled thereto at the initial position of the carriage,
means for rotating said wheel in one and the same direction during the advance
and return of the carriage, a trip for disengaging the coupling, gearing inter-
mediate of the power-wheel and carriage adapted to intermesh and return the
carriage, upon the operation of the trip, and auxiliary power-storage mechanism
for supplying to said power-wheel with each return of the carriage energy
sufficient both to forward the carriage and reverse it, said mechanism consisting of
a spring motor geared to the said power-wheel and provided with manually-
operated winding gear; substantially as described.
11. In a type-writing machine, the combination with the platen carriage, of a
power wheel inediately coupled thereto at the initial position of the carriage,
means for rotating said wheel in one and the same direction during the advance
and return of the carriage, a trip for disengaging the coupling, gearing inter-
mediate of the power-wheel and carriage adapted to intermesh and return the
carriage, upon the operation of the trip, and auxiliary power-storage mechanism
for supplying to said power-wheel with each return of the carriage energy
sufficient both to forward the carriage and reverse it, said mechanism consisting of
a spring motor geared to the said power-wheel and provided with manually-
operated winding gear, having a Geneva stop to prevent over-winding; substantially
as described.
12. In a type-writing machine, the combination with the platen carriage, of a
power wheel mediately coupled thereto at the initial position of the carriage, means
for rotating said wheel in one and the same direction during the advance and return
of the carriage, a trip for disengaging the coupling, gearing intermediate of the
power-wheel and carriage adapted to intermesh and return the carriage, upon the
operation of the trip, and auxiliary power-storage mechanism for supplying energy
to said power-wheel with each return of the carriage, said mechanism consisting of
a spring motor geared to the said power-wheel and provided with manually-operated
winding gear, and a fan governor; substantially as described.
13. In a type-writing machine, the combination with the platen carriage, of a
power-wheel having cog teeth upon a portion of its periphery, a shaft upon which
said wheel is loosely mounted, a volute spring connecting the wheel and shaft, a
band wheel mounted loosely on the shaft and connected to the carriage by a
flexible band, a fixed pin on the power wheel, a co-operating movable pin upon the
band wheel, a trip for moving the movable pin out of line with the fixed pin, a
toothed bar connected with the carriage, and a pinion engaging the toothed bar and
located in the path of movement of the power-wheel teeth; substantially as
described.
14. In a type writing machine, the combination with the platen carriage, toothed
power wheel, and band wheel, said power wheel and band wheel being coupled by
a fixed pin and co-operating movable pin, of a trip for the movable pin consisting
of a crescent-shaped arm, normally out of line with the movable pin, and a key for
advancing said crescent-shaped arm and causing it to trip the niovable pin; sub-
stantially as described.
15. In a type-writing machine, the combination with the platen carriage, toothed
power wheel, and band wheel, said power wheel and band wheel being coupled by
a fixed pin and co-operating movable pin, of a trip for the movable pin consisting
of a crescent-shaped arm, normally out of line with the movable pin, and a key for
advancing said crescent-shaped arm and causing it to trip the movable pin, and a
brake-shoe likewise connected with said key and brought into action simultaneously
with the operation of said trip; substantially as described.
16. In a type-writing machine, the combination with the platen carriage, of a

page_text: power-wheel having cog teeth upon a portion of its periphery, a shaft upon which
said wheel is loosely mounted, a volute spring connecting the wheel and shaft, a
band wheel mounted loosely on the shaft and connected to the carriage by a flexible
band, a fixed pin on the power wheel, a co-operating movable pin upon the band
wheel, a trip for moving the movable pin out of line with the fixed pin, a toothed
bar connected with the carriage, a pinion adapted to engage with the toothed bar
and located in the path of movement of the power-wheel teeth, and a buffer wheel
Hocated at the end of the toothed bar and adapted to engage with the pinion cogs ;
substantially as described.
17. In a type-writing machine, the combination with the platen carriage of a
power-wheel mediately coupled thereto at the initial position of the carriage, a trip
for disengaging the coupling, gearing intermediate of the power wheel and carriage
adapted to intermesh and return the carriage, upon the operation of the trip,
auxiliary power storage mechanism for supplying energy to said power wheel with
each return of the carriage, means for regulating said supply so as to restore to the
power wheel on each return of the carriage its original energy, said means consisting
of a cam wheel on the master shaft of the power wheel, a stop engaging therewith,
and a trip in the path of the return movement of the carriage and means for
regulating the tension of the spring on the power wheel, said means consisting
of a spring-pressed pawl on the surface of the cam wheel and a ratchet wheel
engaging with said pawl, on the master shaft of the power wheel; substantially as
described.
18. In a type-writing machine, the combination with the master shaft of the
power wheel, of a cam wheel loose on the shaft, a spring pressed pawl on the surface
of said cam wheel, and a ratchet fastened to the master shaft and engaging with
said pawl, said cam wheel engaging with the pinion wheel of a fan governor; sub-
stantially as shown and described.
19. In a type-writing machine, the combination with the platen carriage, of a
power wheel mediately coupled thereto, at the initial position of the carriage, a trip
for engaging the coupling, gearing intermediate of the power wheel and carriage,
adapted to intermesh and return the carriage to the beginning of the line on the
operation of the trip, and auxiliary power-storage mechanism for supplying with
each return of the carriage energy sufficient both to forward the carriage and
reverse it, said mechanism consisting of a spring motor, geared to the said power
wheel by means of an endless chain and sprocket wheels on the master shaft of the
power wheel and the shaft of the spring motor respectively, said main shaft of the
spring motor being connected with a key-winding rod having a hand lever, by means
of bevel gear, the gear on the main shaft being smaller than the gear on the winding
lever, whereby the number of revolutions needed to wind the spring motor is
reduced; substantially as described.
20. In a type-writing machine, the combination with the platen carriage, toothed
power wheel, and band wheel, said power wheel and band wheel being coupled by
a fixed pin and co-operating movable pin, of a trip for the movable pin consisting
of a crescent-shaped arm, normally out of line with the movable pin, and a key for
advancing said crescent-shaped arm and causing it to trip the movable pin, and a
brake-shoe likewise connected with said key and brought into action simultaneously
with the operation of said trip, said brake shoe being pivoted to the frame of the
machine, and, on the operation of said trip, pressing upon the rear surface of the
wheel, said wheel having a roughened surface against which the brake shoe bears;
substantially as described.
21. In a type-writing machine, the combination with the revoluble platen having
a ratchet and its operating lever and pawl, of an automatic actuating lever for said
operating lever, the actuating lever being pivoted to the frame of the carriage,
and an abutment lying in the path of movement of the said actuating lever,
and consisting of a stop collar on the way-rod of the carriage; substantially as
described.
22. In a type-writing machine, the combination with the trip for the spacing

page_text: rack-bar, and means for automatically spacing the platen, of a lever serving to
simultaneously release the trip and to throw the automatic spacing means out of
operative relation to the platen; substantially as described.
23. In a type-writing machine, the combination with the trip for the spacing rack
bar, of a releasing hand lever adapted to operate the trip, a lever and driving pawl
for the platen ratchet, the tail of the driving pawl being located in the path of
movement of the releasing hand lever, whereby the carriage can be released from
the rack bar and moved to the beginning of the line and the driving pawl
simultaneously thrown out of engagement with the ratchet, so that the platen
cannot be automatically actuated during said movement; substantially as described.
Dated this 13th day of February 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.