Year: 1898

page_text: Date of Application, 11th Jan., 1898-Accepted, 26th Mar., 1898
A communication by ROBERT TURNER, of Des Moines, in the County of Polk and
State of Iowa, United States of America, Machinist.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both in
the County of Lancaster, 118, New Street, Birmingham, in the County of Warwick,
and 322, High Holborn, in the County of Middlesex, Civil 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:
One of the objects of this invention is to provide a bearing on which the platen
carriage may move longitudinally with a minimum of friction, and the necessity for
frequent application of lubricant. thereto dispensed with, and a simple, cheap and
durable carriage hearing provided.
A further object is to provide improved means, of simple and durable construction
and easy of operation, whereby the platen may be set to be rotated either one or
two line spaces, or is released so that it may be rotated any distance and stop at
points between the lines.
A further object is to provide simple, strong and durable means that may be
easily and quickly operated for separating the tension roller from the platen to permit
the easy passage of paper, and for replacing the same in position to hold the
paper firmly.
A further object is, to provide means of simplified and cheapened construction for
yieldingly pressing the paper holding fingers against the platen, and further to
provide means whereby the outer fingers may be quickly adjusted relative to
the ends of the platen and securely held against inadvertent longitudinal
movements.
A further object is to provide an inexpensive marginal stop device, by which the
return movement of the carriage is limited and which may be quickly and accurately
set to stop the carriage at any predetermined position.
A further object is to provide a device for adjusting the tension of the spacing dogs,
which device is of strong and durable construction and capable of an easy and at the
same time minute and accurate adjustment.
A further object is to provide means that may be easily and quickly operated
whereby the spacing dogs are moved a slight distance longitudinally relative to
the platen so that an impression of a type previously made, may be "shaded " by
reprinting the same letter in the same space.
A further object is, to provide a printing line indicator having a straight edge
that will indicate accurately the line on which the printing is being done when the
platen is raised and thus aid the operator in replacing a previously printed line in the
machine in perfect alignment, even though the said printed lines he at other than
a right angle to the sides of the paper and to provide means whereby the line

page_text: indicator or gauge may be automatically withdrawn when the platen is lowered so as
to not interfere with the types when printing.
A further object is, to provide for this class of machines, a paper table that is
readily detachable and also designed to fold towards the platen when the platen is
raised, as required to permit the platen to pass a vertical line and hence remain in
a raised position when placed therein.
This invention consists in certain details of construction, arrangement and
combination of parts whereby the objects contemplated are attained, as hereinafter
set forth, pointed out in the claims and illustrated in the accompanying drawings,
in which,
Figure 1 shows a top view of the platen carriage and the carriage operating and
controlling mechanism and part of the type-writer frame.
Figure 2 shows a front elevation of the same, with the carriage raised.
Figure 3 shows an end elevation of the same mechanism having one of the thumb
wheels that control the movement of the platen removed.
Figure 4 shows an inverted perspective view of one end of the platen and the
mechanism for rotating the platen one or two line spaces or for perinitting a free
rotation thereof.
Figure 5 shows an end view of the mechanism for controlling the rotation of the
platen.
Figure 6 shows a vertical section through the line 6-6 of Figure 5.
Figure 7 shows a top view of the device for adjusting the marginal spaces.
Figure 8 shows a transverse section of the top of the type writer frame and carriage
frame, illustrating in detail, the mechanism for operating the paper table, the line and
space indicator and the marginal stop.
Figure 9 shows a rear elevation of the feed dog tension device.
Figure 10 illustrates the same mechanism and is a section on the line 10-10 of
Figure 9.
Figure 11 is a detail perspective view of the device for moving the shaft of the feed
dog longitudinally, to produce "shaded" letters.
Figure 12 shows a detail of the end of the feed dog shaft and the shaft of the
shading device, illustrating by dotted lines the movement of same.
Figure 13 shows a transverse section of the carriage taken along the line 13-13
of Figure 2.
Figure 14 shows a detail sectional view to illustrate the mechanism for moving the
tension roller relative to the platen.
Figure 15 shows a detail perspective view to illustrate the same mechanism.
Figure 16 shows a detail view of the rear face of the scale bar, to illustrate the
sliding connection of the paper finger therewith.
Figure 17 shows a detail seetional view of the same through the vertical centre of
the paper fingers.
In the following description there will only be described minutely and specifically
such parts as are new in themselves or are adapted in shape and size to cooperate
with some of the novel parts. It is to be understood that the parts merely mentioned
are of the same construction and perform the function usual to the part named in
most type-writers of this class.
In the accompanying drawings the parts of the frame shown are indicated by the
reference numeral 10.
Mounted on top of the frame, extended longitudinally thereof and projecting
slightly beyond the sides of the frame, is a flat track bar 11, having a V-shaped
longitudinal groove 12 therein.
13 indicates the frame of the feed rack having a track bar 14 thereon provided with
a V-shaped groove 15 to mate with the groove 12. Two or more balls 16 are
interposed between the two tracks to support the weight of the said frame and brace
it against lateral movements, and to permit it to move with a minimum of friction.
The balls are confined by pins or screws 17.
The said frame is supported against tilting movements by means of two anti-

page_text: friction rollers 18, supported upon the bar 11, to engage the top surface of the track
bar 14, and an antifriction roller 19, mounted in a point in the rear of the carriage to
admit a guide bar 20 supported by the frame 13. Thus the major part of the weight
of the carriage is carried upon the balls, and friction and wear reduced to a
minimum.
On the frame 13 is the usual feed rack 21, and the carriage tension device 22.
The platen and its accompanying parts are mounted in a suitable frame 23, that is
hinged to the frame 13 so as to be capable of swinging upwardly beyond a vertical
line. A platen 24 of the ordinary kind is rotatably mounted in the frame, and on one
of its ends is a ratchet face 25. The means for rotating the platen comprises an
arm 26 rotatably mounted on the platen's shaft, and having a sleeve 27 on its lower
end that stands in a horizontal plane with its one end in alignment with the ratchet
face 25. Within this sleeve is a detent. 28, normally forced towards the said ratchet
face by means of a spring and provided on its outer end with a pin 30 that extends
at right angles to the detent. and overlaps the outer surface of the frame 23, for the
purposes hereinafter made clear. This arm 26 is held to its rearward limit by the
spring 31, therefore when the said detent is held against the ratchet face and the arm
force: forwardly, the platen will be advanced.
For preventing inadvertent movements of the platen and for positively stopping
the same when moved the proper distance by the line spacing lever there is provided
a sleeve 32 fixed to the frame 23 with its one end close to the ratchet face of the
platen. Slidingly mounted in this sleeve 32 is a detent 33, having on its inner end
a roller 34, of the size to he admitted between the teeth of the ratchet and on its
outer end beyond the side of the frame 23 a pin 35, shown in Figure 3, to overlap the
frame. A post 36, shown in Figure 4, projects upwardly from the detent through a
slot in the sleeve to provide means for guiding the detent.
A line-spacing lever 37, is fulcrumed to the carriage frame 23, and is provided with
an arm 38 to engage the arın 26, and a second arm 39 to engage the post. 36. These
parts are so arranged that when the lever is operated the arm 26 is first engaged and
rotated far enough to move the platen one or two line spaces, then the post 36 is
engaged and the roller 34 of the detent 33 is forced between two of the ratchet teeth
and a further rotation of the platen positively prevented. The said roller detent is
free to yieldingly engage the ratchet at all times, as required to prevent its
inadvertent rotation except when forced there against by the line spacing lever, 37,
having an arm 39.
Means have been provided for determining the number of line spaces that a
movement of the lever 37 will rotate the platen as follows:-40 indicates a seginental
plate pivoted to the outer surface of the frame 23, concentric with the platen shaft.
At the top is a handle 41 and on its outer surface is a cam 42, designed to engage the
pin 30 of the detent 28. When the segmental plate is placed in one position the
said cam will permit the detent to engage the ratchet face as soon as the spring lever
is moved, hence the platen is rotated two line spaces, or the entire distance that
the limited movement of said lever will permit, and when the segmental plate is
moved to its second position the cam will prevent the detent from engaging the
ratchet face until it has passed one of the ratchet teeth and the platen will be moved
but one line space. It is sometimes desirable to permit the platen to stop at
points between the lines, and to provide for this a cam 43 has been placed on the
segmental plate in a position where it may be brought into engagement with the
post 36, on the roller detent 33, and thus hold said detent out of engagement with
the ratchet face.
A screw 44 is passed through a segmental slot 45 in the plate 40 into the frame 23
and a sliding bolt 46 is mounted in an opening in said frame and normally forced
into engagement with the segmental plate 40, by a coil spring 47. Three notches, 48,
are formed in the plate to admit said bolt, and thus stop the segmental plate in one
of these positions necessary to move the platen one line space or two line spaces or
to hold the roller detent 33 out of engageinent with the ratchet face. And owing to

page_text: the position of the cam 42, the detent 28 will be in an inoperative position relative
to the ratchet 25.
At the rear of the frame 23 is a fixed rod 49, to extend parallel with the platen
and on the end portions of the rod are pivoted the brackets 50. These brackets are
yieldingly held in the direction of the platen by the leaf spring 51. In their lower
ends is mounted a tension roller 52, of the ordinary kind. Each bracket has an
angular opening, 53, therein and 54 indicates a rod passed through said openings
having its bearings in the frame 23 and provided with cams 55 to engage said angular
openings. A lever 56 on one end of said rod provides means whereby the rod may be
rocked, to force the cams against the sides of the openings and thus swing the
brackets 50 and the tension roller away from the platen, to permit the ready insertion
or removal of paper. When the flat surfaces of the cams engage the sides of the
openings, the tension roller and platen are in engagement and the springs, 51, must
be compressed slightly before the rod 54 may be turned, thus the platen is partially
locked when in its closed position.
Two arms, 57, are pivoted to the tension roller shaft and a paper guide plate 58 is
fixed to their lower ends. It is normally held in engagement with the platen by the
leaf spring 59 which are fixed to the rod 49 and engage pins 60 on the said
arms 57.
At the forward end of the carriage frame is a scale bar 61, and above it a
round rod 62, to support the paper fingers. One paper finger is located in the
middle of the rod and one on each end portion thereof. Each is composed of a
sleeve 63, loosely mounted on the rod and having on its under side a transversely
bored lug 64, and the flat curved finger 65, fixed to its inner face.
In this lug 64 is placed a spring 66 and a round headed bolt 67, that is
normally held in engagement with the inner face of the scale bar. It is desirable
that the central finger be stationary, as against longitudinal movements and also
held slightly out of engagement with the platen. A slot 68 is therefore provided
in the sleeve and screw 69 to pass through the slot into the rod. It is also
desirable to have the outer fingers engage the platen and also be capable of a
longitudinal movement, therefore the screw is dispensed with and a series of
notches 70 provided in the rear face of the scale bar that may be engaged and
entered by the said bolts 67. They are made thereby readily adjustable and yet
are held very securely in any position in which they are placed. Figures 13, 16
and 17, show this mechanism quite clearly.
A track bar 71 is fixed to the forward end of the machine frame, parallel with the
track bar 11. In this bar a number of anti-friction rollers 72 are mounted to engage
the lower edge of the scale bar and support the weight of the forward end of the
platen carriage. On the inner left hand surface of this track bar is a groove 73 in
which is slidingly mounted a plate 74, having a series of openings 75, separated by
the distance of one type space and also an indicator and stop 76 projecting upwardly
therefrom. On the top surface of this track bar adjacent to the plate 74 is a scale 77
corresponding to the scale on the scale bar and a spring actuated bolt 78 is passed
through the track bar to enter the openings in said plate 74. On the bar 62 at its
left end is a gravity stop 79, having on its left lower edge a bevel 80. Its other edge
is square. In practical use when the carriage is moved from the left to the right,
the said stop 79 will engage the stop 76 and hold the carriage thus determining the
size of the margin to be left on the paper. When travelling in an opposite direction,
that is from the right towards the left, the said bevel will engage the stop 76, and
hence the stop 79 will be forced rearwardly and the travel of the carriage not
interfered with. To set the stop to produce any desirable size of margin, the spring
bolt 78 is drawn outwardly and the plate 74 is moved until the stop 76 is in
alignment with the desired point on the scale 77. The spring bolt is then released
and will pass through an opening in said plate and thus hold it in position.
The improved feed dog mechanism comprises a suitable cast metal frame, 81,
secured to the rear of the machine and having the usual feed dogs 82 mounted
therein by bearings fixed to a rod 83. This rod is arranged to be capable of a slight

page_text: longitudinal movement but is normally held to its limit towards the left by means of
a spring 84. At the rear lower corner of this frame 81 is a rod 85 rotatably mounted,
having on its one end a worn wheel 86, and in its central portion a pin 87.
A second rod 88 is mounted in the same frame and is provided with a
worm 89 to mesh with the wheel 86, and a thumb wheel 90 on its rear end. It is
obvious that a minute and accurate and easy adjustment of the rod 85 is had by a
manipulation of said thumb wheel. An arm 91 is pivotally mounted on the rod 85
to project upwardly therefrom and a spring 92 is wound upon the rod 85 with its
central portion overlapping the pin and its ends in engagement with the said arm to
press its upper end forwardly. 93 indicates a rod slidingly mounted in the frame 81
with its one end in engagement with the upper end of the arm 91, and its other end
against the arm 94 that projects downwardly from the feed dogs. Thus the resiliency
of the spring 92 is used to force the free ends of the feed dogs upwardly.
In combination with this mechanisin just described a device is provided for moving
the feed dogs laterally a slight distance for the purpose of "shading" the letters by
reprinting the saine letter partially in the same space, the latter one a little to one
side of the former one. 95 indicates a rod rotatably mounted in the frame 81 and
having a cam 96 on its inner end to engage a collar 97 on the rod to which the feed
dogs are fixed. A lever 98 on the outer end of said rod provides means whereby it
may be turned.
An operation of said lever will obviously bring the cam in
engagement with the said collar and force the dogs laterally. When released the
spring 84 will return the dogs to their normal position.
A device is provided whereby the operator may accurately place a paper in the
machine, so that further printing may be done in exact alignment with previously
printed matter or on a designated line, even though said line be at other than a right
angle to the edges of the paper. To this end an upright 99 is provided to be secured
to the machine frame and a curved arm 100 pivoted in its top to pass under the
platen and engage same with its outer end. Said outer end is provided with a straight
edge 101. A spring 102 is applied to the line indicator to normally force it upwardly
and said pivotal point is arranged above the pivotal point of the platen carriage, so
that, as the platen is raised the line indicator will move upwardly in its relation to
the platen far enough to present its straight edge on the "printing line" of the
platen, and as the platen is lowered it will be withdrawn so as to not interfere with
the impact of the types against the platen.
It is desirable to have the paper table 103 arranged relative to the platen so that
as said platen is elevated the paper table will move relative to the platen as required
to permit the platen to turn backwardly beyond a central line in contradistinction to
a paper table rigidly fixed to the platen frame. On the underside are two flat
springs 104 fixed near the top edge and having their free ends curved forwardly near
the lower edge of the table to provide a detachable and pivotal connection with the
rod 49, of the platen carriage frame. 105 indicates two links pivoted at their upper
ends to the ends of the table and having openings 106, in their lower ends pins 107
fixed to the frame 23. Thus the axial point of the table is eccentric to the axial
point of the platen carriage and is so arranged that the paper table will move towards
the platen when the platen is elevated. This is clearly shown in Figure 8 and the
operation shown by dotted lines.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, I declare that what I claim is:-
1. In a type-writer, the combination of a bar to extend longitudinally of the
machine frame and having a V-shaped groove therein, a rolier having a grooved
periphery rotatably mounted in the machine frame in the rear of the said bar, a
sliding carriage, a bar fixed thereto and having a V-shaped groove on its under
surface, bearing balls interposed in said grooves, arms projecting rearwardly from the
carriage, a guide rod supported thereby to engage the aforesaid grooved wheel, and a

page_text: series of anti-friction rollers fixed to the track bar on the machine frame to engage
the top surface of the track bar on the sliding carriage, for the purposes stated.
2. The combination with a type-writer platen rotatably mounted, of a ratchet face
on one end thereof, an arm pivoted to the platen shaft, a spring for normally holding
the arm rearwardly, a sleeve on the outer end of the said arm, a detent in said sleeve
to engage the ratchet face, a spring for normally forcing the detent against the
ratchet face, a lever fulcrumed to a part of the platen carriage, having its one end in
engagement with said arm, to rotate the same and means for limiting the movement
of the lever.
3. The combination with a typewriter platen rotatably mounted, of a ratchet face
on one end thereof, an arm pivoted to the platen shaft, a spring for normally holding
the arm rearwardly, a sleeve on the outer end of the said arm, a detent in said sleeve
to engage the ratchet face spring for normally forcing the detent against the
ratchet face, a lever fulcrummed to a part of the platen carriage having its one end in
engagement with said arm, to rotate the same, means for limiting the movement of
the lever a can attached to the platen frame, and capable of a slight movement
thereon, and a pin on the outer end of the said detent to engage said arm and hold
the detent away from the ratchet face.
4. The combination, with a typewriter platen rotatably mounted, of a ratchet face
on one end thereof, an arm pivoted to the platen shaft, a spring for normally holding
the arm rearwardly, a sleeve on the outer end of the said arm, a detent in said sleeve
to engage the ratchet face, a spring for normally forcing the detent against the
ratchet face, a lever fulcruined to a part of the platen carriage, having its one end in
engagement with said arm, to rotate the same, means for limiting the movement of
the lever, a roller detent mounted in the platen frame adjacent to said ratchet, a più
projecting therefrom, a spring for normally holding the roller in contact with the
ratchet, and an arm on the said lever to engage said pin and force the said roller into
positive engagement with the ratchet face at the end of the movement.
5. The combination, with a typewriter platen rotatably mounted, of a ratchet face
on one end thereof, an arm pivoted to the platen shaft, a spring for normally holding
the arm rearwardly, a sleeve on the outer end of the said arm, a detent in said sleeve
to engage the ratchet face, a spring for normally forcing the detent against the
ratchet face, a lever fulcrumed to a part of the platen carriage, and having its one
end in engagement with said arm, to rotate the same, means for limiting the
movement of the lever, a cam attachment to the platen frame, and capable of a slight
movement thereon, and a pin on the outer end of the said detent to engage said cam
and hold the detent away from the ratchet face, a roller detent mounted in the platen
frame adjacent to said ratchet, a pin projecting therefrom, a spring for normally
holding the roller in contact with the ratchet, and an arm on the said lever to engage
said pin and force the said roller into positive engagement with the ratchet face, at
the end of its movement.
6. In a typewriter, a suitable platen, a ratchet face at one end thereof, a spring
actuated detent normally held in engagement with the ratchet, a pin on the outer
end of the detent, means for advancing the detent to rotate the platen, a segmental
plate pivoted to the platen frame, a cam on said plate to engage the said pin and
hold the detent out of contact with the ratchet, until it passes beyond the cam.
7. In a typewriter, a suitable platen, a ratchet face at one end thereof, a spring
actuated detent normally held in engagement with the ratchet, a pin on the outer
end of the detent, means for advancing the detent to rotate the platen, a segmental
plate pivoted to the platen frame, a can on said plate to engage the said pin and hold
the detent out of contact with the ratchet until it passes beyond the cam, a roller
detent mounted in the platen frame to engage the ratchet face, a pin on its outer end,
a spring for holding it in contact with the ratchet, means for forcing it towards the
ratchet when the other detent is advanced to rotate the platen and a cam on said
segmental plate for engaging said post, for the purposes stated.
8. The combination in a typewriter, of means for rotating the platen, one or two
line spaces or an indefinite distance, comprising an arm pivoted to the platen shaft,

page_text: a spring actuated detent in its end, a pin on said detent, a spring actuated roller
detent mounted in the platen frame, a pin on the outer end, a lever fulcrumed to the
platen frame and having arms to engage the aforesaid arm and also said roller detent,
a segmental plate pivoted to the platen frame, and two cams thereon to be engaged by
said detent pins or posts.
9. The combination with a device for rotating a platen one, two or an indefinite
number of line spaces, of a segmental plate pivoted to the platen shaft, and having a
segmental slot and three notches therein, a. screw passed through said slot into the
platen frame, a spring actuated bolt mounted in the platen fraine to enter any of said
notches, and two cams on the outer face thereof, for the purposes stated.
10. The combination, with a platen, of two brackets pivoted at their upper ends
to the ends of the platen frame in the rear of the platen and having openings
therein, a tension roller mounted in the said bracket, yielding pressure devices for
holding the roller to the platen, a rod rotatably mounted in the platen frame and
extended through said angular openings and cams on said rods to engage said
angular openings, and a lever on one end of the said rod.
11. The combination with a platen of two brackets pivoted at their upper ends to
the ends of the platen frame in the rear of the platen and having angular openings
therein, a tension roller mounted in the said brackets, yielding pressure devices
for holding the roller to the platen, a rod rotatably mounted in the platen frame
and extended through said angular openings and cams on said rods to engage
said angular openings, a lever on one end of the said rod, a guide plate pivoted
to the tension roller shaft and yielding pressure devices for normally holding it
adjacent to the platen.
12. The combination with a platen frame and a platen, of a sleeve rotatably
mounted on the platen frame in front of the platen, a bolt slidingly mounted
beneath the sleeve at right angles thereto, to engage a part of the platen frame,
a spring for pressing said bolt forwardly and a paper finger fixed to the sleeve,
substantially as set forth.
13. The combination with a platen frame and a platen, of a sleeve rotatably
mounted on the platen frame in front of the platen, a bolt slidingly mounted
beneath the sleeve at right angles thereto, to engage a part of the platen frame, a
spring for pressing said bolt forwardly a paper finger fixed to the sleeve and a
set screw passed through a slot in the sleeve into the sleeve support, to limit the
movement of the finger.
14. The combination with a platen frame, of a round bar in the platen frame in
front of the platen, a bar beneath the said bar having a flat inner surface and a
series of notches therein, a sleeve rotatably mounted on the round bar, a bolt slidingly
mounted on the under side of the sleeve, a spring for normally pressing said bolt
forwardly into engagement with the rear surface of said notched bar and a paper
finger fixed to the sleeve substantially as set forth.
15. In a typewriter, the combination with a suitable carriage of a bar fixed to
the machine frame, to extend parallel with the carriage, a scale marked on its top,
a plate slidingly mounted in said bar and a stop on said plate, means for securing
said plate at any point relative to the bar, and a gravity stop pivoted to the carriage
frame and having a square edge on its right side and a bevel on its left for the
purposes stated.
16. In a typewriter, the combination with a suitable carriage of a bar mounted
on the machine frame to extend parallel with the carriage, a scale marked on its top,
a perforated plate slidingly mounted on the inner face of said bar, a stop fixed
thereto, a spring actuated bolt in the said bar to enter said perforations, and a gravity
stop pivoted to the carriage frame and having a square surface on its right edge and
a bevel on its left, substantially as set forth."
17. In a typewriter, the combination with a sliding carriage having a feed rack,
of a suitable feed dog pivotally mounted adjacent to the feed rack, an arm projecting
downwardly therefrom, a rod pivoted in suitable bearings in the rear of the machine
frame, a worm gear on its one end and a pin in its central portion, an arm mounted

page_text: on said rod and extended upwardly therefrom, a rod slidingly mounted with its one
end in engagement with said arm and its other with the arm on the feed dog, and a
spring on the said pivoted rod having its central portion in engagement with the
said pin and its ends in engagement with said arm on the rod, and a shaft rotatably
mounted having a worm gear on its one end to mesh with the aforesaid worm gear
and a thumb wheel on its other end for the purposes stated.
18. In a typewriter having a sliding carriage and a feed rack thereon, the
combination of a pivoted feed dog, capable of a slight movement longitudinally of
the platen, a spring for normally holding the dog to one limit of its movement and a
shaft rotatably mounted in suitable bearings having a lever on one end and a cam
on its other end to engage the shaft to which the feed dogs are fixed, substantially
as set forth.
19. In a typewriter having a sliding carriage and a feed rack thereon, the
combination of a rock shaft capable of a slight longitudinal movement, a roller
thereon, a spring for holding the shaft to its limit of movement, a feed dog fixed
thereto, a second shaft rotatably mounted having a lever on one end and a cam on
its other end to engage said roller, substantially as set forth.
20. In a typewriter, the combination of a platen bearing frame hinged at its rear
end and capable of swinging to an approximately vertical position, a support fixed
to the machine frame and extended above the pivotal point of the said platen
bearing frame, a curved arm pivotally mounted at the top of the said support and
having on its outer end a straight edge to extend parallel with the printing line on the
platen, and a notch of approximately one letter space formed in the said straight
edge at the printing centre of the machine, and a spring to engage the said curved
arm and to wieldingly hold it against the platen, said parts being so proportioned
and arranged ... when the platen is in its elevated position the straight edge on
the end of the curved arın will lie parallel with the printing line of the platen, and
when the platen is in its lower position ready for printing the said straight edge will
be withdrawn from the printing line in a direction toward the pivotal point of
the arın, substantially as and for the purposes stated.
21. In a typewriter, the combination of a sliding carriage, a plated bearing frame
hinged to the sliding carriage, a rod fixed to the platen bearing frame to extend
longitudinally thereof, a paper table detachably and pivotally connected with the
said rod, and links pivoted to the ends near the outer edge of the paper table and
detachably and pivotally connected with the sliding carriage frame at a point in the
rear of the pivotal point of the platen bearing frame, substantially as and for the
purposes stated.
22. The combination in a typewriter having a sliding carriage and a platen frame
hinged thereto, of a paper table, two leaf springs fixed to its under side and
arranged to detachably and pivotally engage a part of the platen. frame, two arin's
pivoted to the ends of the paper table and detachably and pivotally connected with
the said sliding carriage substantially as and for the purposes stated.
Dated this 10th day of January 1900