various improvements in typewriters or typewriting
Year: 1899

page_text: Date of Application, 26th Sept., 1899-Accepted, 23rd Dec., 1899
ntion relates to various improvements in typewriters or typewriting
COMPLETE SPECIFICATION.
Improvements in Type-writing Machines.
I, ALEXANDER MELVILLE CLARK, of the Firm of A. M. & Wm. Clark, of 53,
Chancery Lane, in the County of Middlesex, Fellow of the Chartered Institute
of Patent Agents, do hereby declare the nature of this invention a communication
to me by The Wagner Typewriter Company, Incorporated, of 220, Broadway,
New York City, in the County and State of New York, United States of
America and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention relates to various improvements in typewriters or typewriting
machines.
The object of the invention is to overcome the disadvantages heretofore found in
type writing machines and to produce an efficient typewriter which will be
effective under all conditions.
The invention may briefly be said to comprise-
1st. Improved means for shifting the platen to write upper or lower case
characters in such a manner that the platen is held or locked against vibration in
any position in which it rests.
2nd. Improved means for controlling the extent to which the ribbon is fed from
spool to spool at each operation of a type key or spacing key.
3rd. Improved means for releasing the feed rollers which co-operate with the
platen to bring about the line feed of the paper.
4th. Improved means for supporting the ribbon spools to prevent the escape of
the ribbon therefrom.
5th. An improved detachable envelope guide; and
6th. Hand-operated means for releasing the type-bar lock after the same has
been operated automatically to lock the type bars against movement.
The invention consists in the novel arrangement and combination of parts and
to details hereinafter described and claimed.
In the accompanying drawings wherein like characters represent corresponding
parts in the various views
Figure 1 is a top view of a typewriting machine embodying the invention;
Figure 2 is a central transverse sectional view of the same on the line 2-2,
Figure 1;
Figure 3 is an enlarged detail transverse sectional view through the paper
platen and envelope guide;
Figure 4 is an enlarged detail transverse sectional view of the carriage stop;
Figure 4 is a fragmentary perspective view of the same;
Figure 4b is a fragmentary bottom view of the stop and its co-operating.
mechanism;
Figure 5 is a transverse sectional view of the entire machine on line 5-5 of
Figure 1, looking in the direction of the arrow ;
Figures 5 and 5b are a fragmental detail face view and end view respectively of
parts to be hereinafter described;
Figure 5 is a view corresponding to Figure 5ª, except that the parts are shown
in different positions;

page_text: :
Figure 6 is a transverse sectional view of the entire machine taken on the line
- of Figure 1 and looking in the direction of the arrow z.
Figure 7 is an enlarged detail top view with parts broken away of the platen
carriage and frame and with parts removed for purpose of clearness;
Figure 8 is a fragmental face view of the envelope guide;
Figure 9 is an enlarged detail of a portion of the same;
Figure 10 is an isolated top view of the ribbon spools and guide;
Figure 1 is a front view of the same;
Figure 11" is a detail front view of a portion of the ribbon spool shifting
mechanism;
1.
Figure 12 is a detached front view of the platen support, platen and its co-
operating feed rollers;
Figure 13 is a bottom view of the same;
In the accompanying drawings, 1 represents the framing of a typewriting
machine in which the various working parts are mounted. The machine is
provided with a reciprocating carriage which has a vertically shiftable platen 2
carried by an independent casing and is supported together with its casing in
bearings 3 carried by links 4 which are pivoted to a rod 5; one of said links
being provided at each end of the machine. Co-operating with the platen 2 are
various feed rollers carried by a platen casing, as is clearly illustrated in detail in
Figs. 12 and 13 and which will be hereinafter more fully described. These parts
are carried or supported upon a roller 6 which is carried by the platen casing
and bears upon a rail 7, each end of which is connected with a bell crank lever 8,
8", which may be termed platen supporting levers. In order to prevent the roller 6
and the parts supported thereby from moving away from the rail 7 when the parts
are shifted vertically, a pivoted arm 7" is provided which is carried by the platen
casing 2 and takes under the rail, as clearly shown in Figs. 2 and 5, a spring 7b
tending to normally maintain the parts in the position illustrated. The platen
supporting levers 8 and 8" are pivoted to the framing of the machine, as indicated.
at 9, and are themselves united by rock shaft 10, so that motion transmitted to
one of the levers will cause the one at the opposite end of the frame to receive
a corresponding movement. It being remembered that the platen frame together
with the platen carried thereby, which is illustrated in Figs. 12 and 13, is held
in place upon the paper carriage by the links 4, and by reason of the fact that
the roller bears upon the rail 7, it will be understood that a movement imparted
to the bell crank levers 8 and 8" will cause the rail 7 together with the platen to
be either elevated or depressed to bring the platen to a position where it will
receive the impact of either an upper or lower case character, as the case may
b. The free end of one of the bell crank platen supporting levers (8") is provided
with an angular lug 11 projecting from the face thereof. This lug is of a size
which corresponds with the openings 12, 13, in an independent locking lever 14,
which is pivoted at 15 and normally maintained in the position represented in
Figure 5 by a spring 16. The openings 12 and 13 constitute portions of an
internal recess or opening contained in the lever 14 and in which the stud or
lug 11 is adapted to operate. The different portions of this opening in the
lever 14 constitute guiding surfaces and locking faces, as will be fully explained.
Thus, for instance, the inclined portion 17 constitutes a guiding face against which
the lug 11 is adapted to bear when the free end 18 of the locking lever 14 is
depressed. This locking lever 14 is pivoted preferably at one end of the machine
and at the opposite end of the machine is a second shifting lever 19, which is
clearly illustrated in Figure 6. This shifting lever 19 is provided with a finger
key 20 and is pivoted to the framing of the machine, as indicated at 21 and
normally maintained in the elevated position by a coiled spring 22. The arm 23
of this lever is adapted to bear against the face or edge of the platen supporting
lever 8 and is maintained in contact therewith by a lug 24 on each side thereof.
This bell crank lever 8 has connected therewith a coiled spring 25 which normally
tends to maintain the platen 2, its casing and the parts connected therewith in

page_text: an elevated position, or in other words, spring 25 operates as a counterbalance for
the platen and the parts connected therewith, it being understood that the tension
of this spring is not sufficiently strong to overcome the weight of the platen and
its connections, but facilitates the movement of these parts. In the present
instance the spring 25 is shown to engage serrations or teeth 25° (Fig. 6) carried
by the bell crank lever 8 so that the spring may be connected to the lever 8 at
different points to increase or decrease the effect thereof. The forward end of the
shifting lever 19 is provided with a pin 26 which is adapted to bear against the
face of a pawl 27 which is connected with a rock shaft 28 to the opposite end
of which rock shaft is secured a bell crank lever 29 (see Fig. 5), one arm 30 of
which normally projects into the path of a pin 31 on the lever 32 which corresponds
to the shifting lever 19 and is provided with a finger key 33. The free end 18
of the spring-pressed locking lever 14 normally maintains the bell crank 29 and
the pawl 27 in the position illustrated in Figures 5 and 6, so that when the key 20
(Fig. 6) is depressed the pin 26 on the lever 19 will be engaged by the hook in the
pawl 27 and prevent the upward return of the lever, and the bell crank lever 29
will at the same time cause the free end 18 of the locking lever 14 to be depressed
to effect a locking of the platen against vibration. The operation of this portion
of our device is as follows;
Should the operator desire to shift the platen to cause upper case characters 34
on a type-bar 35 to contact therewith, it is merely necessary to depress the key 20
when the arm 23 on the lever 19 will shift the bell crank platen supporting lever 8
around its pivot and cause the track 7 together with the platen and parts supported
thereby to be moved around the pivot 5 of the link 4. The movement
of this bell crank lever 8 produces a corresponding movement of the
bell crank lever 8ª at the opposite end of the machine through the intermediate
rock shaft 10 which unites the two so that both ends of the rail 7 will be
elevated simultaneously. The depression of the key 20 likewise causes the
pawl 27 to engage the pin 26 on the lever 19 and to maintain the platen in the
elevated position. The forcing of the pawl 27 to one side likewise causes the rock
shaft 28 to be turned, thereby operating the bell crank lever 29 to effect a move-
ment of the locking lever 14 around its pivot. This movement of the lever 14
causes the guide face 17 to contact with the lug 11 on the bell crank lever 8", and
said lug rides along the guiding face until it reaches the locking recess 13 in
which it is adapted to fit. By the time this movement is accomplished, the hook
in the pawl 27 is reached and a movement of the pawl 27 in the direction of
the arrow y. Figure 6, is allowed, which movement allows of the return of the
bell crank 29 to its normal position, shown in Figure 5, and the spring 16 causes
the recessed end of the lever 14 to be depressed, thereby bringing a locking
recess 36 into engagement with the lug 11 on the bell crank lever 8. Thus, it
will be seen that not only in the positions of rest, but in the various movements
of the shift, the free end of the bell crank lever 8ª which carries the stud 11 is
held against vibration, so that perfect alignment of the type impinging against
the platen can be provided. It is obvious that if the least vibration was had
during the impinging of the type, perfect alignment could not be obtained. In the
first instance, the free end of the bell crank lever 8 which carries the stud 11
is locked in the recess.12. It is next forced and held by positive pressure in the
recess 13 and finally is engaged in the recess 36, so that movement of the bell
crank and the parts controlled thereby cannot be had. In order to release the
platen from the elevated position to which it has been shifted by the key 20,
it is merely necessary to depress the key 33 when the pin 31 thereon will contact
with the arm 30 of the bell crank lever 29 and through its rock shaft 28 cause
the pawl 27 to be thrown out of engagement with the pin 26 on the shifting
lever 19 and allow the parts to resume their normal position. We have described
the means for shifting the platen to continually write upper case characters. When
it is desired to merely write. say, one upper case character and allow the platen
to at once resume its normal position, the key 33 is depressed when the arm 23
thereon effects a movement of the bell crank. lever 8ª and the parts supported

page_text: thereon as when the bell crank lever 8 is moved. At the same time the pin 31
on the lever 32 contacts with the arm 30 of the bell crank lever 29 and by this
means transmits motion to the locking lever 14 causing it to move around its
pivot 15. This movement of the lever 14 around its pivot causes the locking
recesses therein to be brought into engagement with the lug 11 on the free end
of the bell crank lever 8" at the same time said bell crank lever is moved around
its pivot to raise the platen, the final movement of the parts leaving the lug 11
in the recess 13 of the locking lever 14 to lock the parts against movement in the
position to which they are shifted and when the finger releases the key 33, the parts
will resume the normal position illustrated in Figure 5.
The next feature of the invention consists in means for controlling the extent
to which the ribbon is fed from one spool to another at each operation of a type
key or space key. In the present instance the means for moving the spools has
been shown as comprising two ratchet wheels 37, 38, each of which is connected
by bevel gear 39, 40, with a spindle 41 which rotates a spool. Each of these
ratchet wheels is operated by a reciprocating pawl 42, a non-reciprocating spring-
pressed pawl 43 being provided for each of the ratchet wheels and one of which
is in constant engagement with a ratchet wheel to prevent a backward movement
thereof. The reciprocating pawls 42 are carried upon a rock shaft 44 which is
also provided with a link 45, (see Figure 2), and the free end of each of the
pawls 42 is supported upon a spring 42 which is carried by the support of the
pawls 43 while the link 45 is operated from a rocking projection 46 connected
with the spacing mechanism. This rocking projection 46 may likewise be operated
by the spacing lever 47 which is provided with a spacing bar 48 extending across
the front of the machine. The projection 46 on the spacing mechanism is operated
at each operation of a type bar 35 by a shoulder 49 thereon contacting with a
universal bar 50 just before the type on the type bar has contacted with the platen.
The universal bar 50 is connected with arms 51 by means of links 52. The arms 51
are rigidly connected with a rock shaft 53 to which is likewise rigidly connected
the projecting arm 46. Thus, it will be seen that a type bar will contact with
the universal bar 50 at each operation of the type bar and move the arm 51
through the connection 52 and will shift the rock shaft 44 through the connec-
tion 46 carried upon the rock shaft 53 to produce a movement of the pawls 42 at
each operation of a type bar. Each of the non-reciprocating pawls 43 is carried
by a bar 54 which extends the length of the machine and is pivoted centrally
therein, as indicated at 54, Figure 11". This bar 54 is provided at one end where
it projects beyond the machine with a handle 55. The bar 54 carries a spring 56
provided with a stud 57 which is adapted to engage in the recesses 58 to maintain
either end of the bar 54 either in the elevated position illustrated in Figure 6,
wherein the pawls are adapted to engage the ratchet wheels or to maintain the
pawls out of engagement with a ratchet wheel when one end of the bar is lowered
and the stud 57 engages the lowermost recess 58 in a part of the framing 1. It
being understood that the bar 54 is pivoted centrally, it will be obvious that to
lower one end of the bar will raise the other, so that as the pawls at one end of the
machine are raised into engagement with the ratchet wheel, the pawls at the
opposite end will be disengaged or lowered. By this means the device may be
set to automatically feed from one spool to the other in either direction. It is
desirable in typewriter machines to provide means for varying the extent of speed
of the feed of the ribbon. In order to accomplish this result, a cam 59 is
provided which is preferably carried upon the bracket 60 (Figure 11) which
constitutes a support for the bevel gears 39, 40, and the ratchet wheel 37. This
cam 59 is made adjustable by any suitable means around the axis of the ratchet
wheels 37, 38. As a pawl 42 is reciprocated around the axis of the rock shaft 44,
the free end of said pawl is adapted to contact at its forward movement with the
cam 59 and to disengage said pawl from its ratchet wheel. It is obvious that an
adjustment of the cam 59 by means of the set screw 59" (Figure 5) or otherwise,
will cause the pawl to disengage the ratchet wheel during any desired extent of
movement of the pawl in the direction opposite that of the feed and will prevent

page_text: the re-engagement of said pawl with the ratchet wheel until it again comes to
the point on the cam where it was thrown out of engagement. Thus a pawl may
be caused to engage adjacent teeth or may be allowed to travel the distance
of two or more teeth before it engages a ratchet wheel to step it intermittently
the distance of one or more teeth, as desired. In order that the ribbon spools may
be operated by hand, each of the ratchet wheels has been provided with a handle 61,
whereby said ratchet wheels can be rotated independently of the automatic opera-
tion thereof to transmit motion through the bevel gear 39, 40, to the spindle 41
which carries the ribbon spools.
Reference is had to Figures 12 and 13 which represent the platen and the
casing connected therewith which is adapted to be shifted vertically independently
of the platen carriage for the purpose of writing upper case or lower case characters.
In these figures, 62 represents a series of feed rollers which are adapted to project
through apertures 63 in a guide plate forming a portion of the casing of the
platen and to bear upon the platen 2. These rollers are carried by a shaft 64
which is supported by arms 65 one at each end of the platen. These arms 65
are provided with ratchet-faced hubs 66, each of which engages a corresponding
ratchet-faced collar 67 which is connected with a spring 68; the hub 66, collar 67
and spring (8 being adapted to rotate around a supporting shaft 69. The opposite
end of each of the springs 68 from that which is connected with the collar 67 is
secured to an arm 70 which carries a shaft 79 that forms a support for a series
of rollers 71, which, like the rollers 62, bears against the face of the platen 2.
Thus, it will be seen that the springs 68 normally maintain both sets of
rollers 62, 71, in contact with the platen and that the tension of the spring 68
can be regulated by the clutch section or ratchet faced collar 67. It is sometimes
desirable to throw these rollers out of contact with the platen in order that
the paper may be straightened thereon and for other purposes. To accomplish
this end, there are provided cam faces 72 formed integral with collars 73 which
are adjustably arranged or secured upon the shaft 69 by set screws 74 or other-
wise. Cooperating with these cams are two sliding arms 75 which are carried
by a longitudinally movable rod 76 that connects with a piece 77 which is
adapted to be shifted in the direction of the axis of the platen by hand lever 78,
or otherwise. The free ends of each of the arms 75 take over the shafts 64 and 79
of the feed roller, so that a movement of the sliding arms 75 in the direction
of the arrow, Figure 13, will cause the same to ride down the cam 72, thereby
lowering the shafts 64 and 79 of the feed rollers and causing said feed rollers to
be carried out of contact with the face of the platen, a spring 80 being utilized to
restore the sliding arms to their normal position.
The next feature of the invention consists in an improved means for supporting
the ribbon spools to prevent the escape of the ribbon therefrom. It has been
common heretofore to support ribbon spools so that the lamina or layers of ribbon
will be vertically supported upon the spools and should the ribbon" become slack
there would be a liability of the ribbon dropping from the spool. Special reference
being had to Figures 6, 10 and 11, it will be seen that each of the ribbon
spools 81 is maintained centrally upon a spindle 41 to which is secured a disk 82
from which projects a pin 83 eccentric to the axis of the spindle 41. This
pin 83 is adapted to engage in a corresponding recess 84 in a ribbon spool 81,
so that movement transmitted to the spindle 41 is transmitted to the spool carried
thereby. Below and partly surrounding the ribbon spool is a casing 84 which is
apertured as indicated at 85 for the passage of the ribbon 86 and above the
aperture 85 in the ribbon spool casing projects a guide finger 87 which prevents
the ribbon from being withdrawn upwardly from the spool or casing during the
operation of the machine, allowing however, of the ready removal of the ribbon
when the same is carried to a position which it does not normally have when the
machine is in operation. It will be observed that by this means the ribbon is
prevented from dropping off the spool, the casing acting as a guide for the ribbon
in case of slack being had or a tendency to unwind, the outward limit of move-

page_text: ment of the ribbon being controlled by the casing and a further operation of
the machine tending to take up the slack and automatically tighten and straighten
the lamina of ribbon on the spool. The ribbon is conveyed from spool to spool
in any desirable manner. In the present instance it has been shown conveyed to
a ribbon guide 88 which likewise is provided with arms 89 that constitute a guide
for the type bars.
The next feature of the invention consists of an improved detachable guide which
is simple in construction and may be readily applied to or disconnected from the
machine to enable an operator to write envelopes, postal cards and narrow papers
of all descriptions without difficulty when desired, and to detach and remove said
guide when it is not in use. This envelope guide is represented in Figures 2, 3,
7, 8 and 9, wherein 90 represents a rod which is of sufficient length to project
across the face of the platen and is adapted to be pivotally seated in bearings 91,
92, supported by the stationary guide plates 92ª which are connected to or form
part of the casing of the platen, at or near opposite ends of the platen. The
bearing 91 comprises a perforated ear in which the rod is adapted to seat itself and
oscillate. The bearing 92 which is shown in detail in Figure 8, comprises a
perforated ear 93 in which an end 94 of the rod 90 is adapted to seat itself.
Projecting from this end of the rod is an angle-piece 95 which forms a shoulder 96
adapted to bear against the perforated ear 93 when the envelope guide is in
operative position. The free end of this angle-piece 95 is provided with a
depression 97 in which an arm 98 of the spring-plate 99 is adapted to bear and to
lock the rod 90 against withdrawal from its supports. This spring-pressed plate
likewise constitutes a spring which normally maintains the finger 100 of the
envelope guide in the position represented in Figure 3, the hand-piece 101 being
connected to said finger to shift it out of its normal position against the tension
of the spring-plate 99, the rod 90 acting as a rock shaft for this purpose.
It will be observed that by this means a guide (100) is provided at the centre of
the platen so as to retain narrow paper, envelopes, postal cards and the like,
which are too narrow to be held by the stationary plates 92ª against the platen
in proper position to be written upon.
In order to detach the guide it is merely necessary to deflect the spring
plate 99 forward until the arm 98 thereof is withdrawn from the depression 97
in the angle piece when the rod 90 may be moved to the right to withdraw the
end 94 from its bearing. After the end 94 has been withdrawn, the opposite
end of the rod 90 may be withdrawn from its bearing and the rod removed.
The next feature of the invention consists in hand operated' means for releasing
the type bar lock after the same has been operated automatically to lock the type
bars against movement when the carriage has traversed to the end-stop. This
means is best represented in Figures 2, 4, 4, 4, 5, 5", 5" and 5°. The paper
carriage 102 is supported at the front of the machine upon a rod 103 connected
at each end to the frame of the machine. This rod constitutes a bearing for a
roller 104 carried by the carriage. A pointer 105 on the carriage is adapted to co-
operate with the scale 106 on the frame of the machine to designate the printing
point. A stud 107 likewise projects from the forward portion of the carriage
and is adapted to contact with a cam 108, above the highest portion of which is
a stop 109. This cam 108 is carried by a sleeve 110 which is adapted to slide
longitudinally upon a supporting rod 111, the handle 112 being utilized to traverse
the sleeve with its cam and stop along said rod. This handle is pivoted to the
sleeve or sliding piece, as indicated at 113 and is in the nature of a bell crank
lever, one end 113° (see Fig. 4b) of which is provided with ratchet teeth which
are adapted to engage corresponding ratchet teeth on a short ratchet rod 114
upon the left hand half of the machine, the ratchet teeth on the pawl being
normally maintained in engagement with the rack by a suitable spring 11:
similar to the spring 139 (Fig. 7). This ratchet 114 is carried by arms 114
which support it upon the rod 111 around which it is adapted to vibrate. Rigidly
connected with these arms is a depending arm 115 which is provided with a

page_text: pin 116 which engages an arm 117 and moves it a short distance in either direction
at the extreme movement of the arm 115. The pin 116 on the depending arm 115
allows of said arm 115 nearly completing its movement in either direction before
it reaches contact with either of the studs 118 carried by the lever 117. The
intermediate movement of the depending arm 115 between the studs 118 on the
lever 117 allows the pin 119 on the lower end thereof to contact with the pawl 120
which is pivoted at 121 to a pivoted arm 122 which carries a hammer 123 adapted
to ring a bell 124.. The pawl 120 is provided with a flange 120" which projects
from one face thereof and against which the pin 119 is adapted to engage on the
upper side in its forward movement and on the under side in its backward
movement The forward movement of the depending arm 115 which is brought
about by a depression of the rack 114 in the manner described, causes a depression
of the forward end of the lever 122 through the pawl 120 until it passes the
flange 120 of the pawl when the lever 122 is released and the hammer thereon
allowed to strike the bell. The backward movement of the depending arm 115
causes the pin 119 to raise the pawl 120 around its pivot, as indicated in Fig. 5º,
and thereby cause the pawl to be carried out of the path of the pin 119 in its
backward movement. Connected with the arm 117 is a rock shaft 125 from which
project arms 126 (see Fig. 2) that carry a rod 127 which projects the entire length
of the machine. This rod 127 is adapted to move into the path of a catch 128
on each of the type key levers 129 and lock the same against movement. Connected
with the rod 127 is a button 130 which projects through the casing or framing 1 of
the machine to the forward side thereof in a convenient place to be moved by
the operator. By this means the rod 127 can be readily forced out of the path
of the catches 128 of the type keys after the same have been automatically locked.
The operation of the automatic locking of the type keys is brought about as
follows: The handle 112 of the end stop is turned on its pivot and the sleeve 110
together with the parts connected therewith are moved along the rod 111 to a
point where it is desired the carriage should stop at the end of a line. This is
indicated by a pointer 131 which is carried by the sleeve and cooperates with
the scale 106. Thus, for instance, the stop having been set at the point 60, as
indicated in Figure 1, the carriage will traverse the frame until the pointer 105
reaches the indication 60 on the scale when it is stopped. Just before having
reached the point 60 on the scale, however, the stud 107 on the carriage contacts
with the cam 108 on the end stop and forces the stop around its pivot and
depresses the rack 114 which causes the depending arm 115 connected with the
supporting arms thereof to be moved in the direction of the arrow in Fig. 5 and
motion is thus transmitted to the bell hammer to cause the bell 124 to be sounded,
in the manner hereinbefore described, to notify the operator that the end of the
line is about to be reached. Near the end of the movement of the depending
arm 115, the front lug 118 on the arm 117 is engaged by the pin 116 and the
rock shaft 125 is moved against the tension of its spring 132. This movement
of the rock shaft 125 causes the rod 127 through the connecting arms 126 to be
moved forward into the path of the catches 128 upon the type key levers 129 and
lock the same against movement, the movement of the rod at the same time
forcing the button 130 outward. The rear lug 118 assures the proper releasing
of the key levers in the event of the spring 132 failing to act. It sometimes
cecurs that one or more additional letters would complete a word and that a
proper division of the word so far written is impracticable. By pressing the
button 130, the rod 127 is forced out of the path of the catches 128 on the type
keys when the same may be operated to write the additional letter or letters
desired.
The advantage of this feature of the present invention consists in being able
to readily unlock the locking bar after the same has been automatically shifted to
lock the type keys against movement.
Any suitable marginal stop may be provided for the device. In the present.
instance a marginal stop has been shown which is somewhat similar in construc-
tion to the end stop. In this construction a sleeve or sliding block 133 (Figure 9)

page_text: embraces the rod 111 and also embraces a rod 134 which has a ratchet face 135
preferably extending only along the right hand half of the rod. Cooperating
with the ratchet 135 is a pivoted bell crank pawl 136 which is provided with a
handle 137 and a ratchet face 138 adapted to engage the ratchet rod 134 and
prevent the sliding block 133 from being moved towards the right, a spring 139 5
tending to normally maintain the parts in the locked position. The block 133
is likewise provided with an abutment 140 against which an abutment on the
front rail 141 of the carriage is adapted to abut to limit the movement of the
carriage towards the right.
Having no particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
1 claim is:
-
1. In a typewriter, the combination of a paper platen, a shiftable platen casing
therefor, a shift key and cooperating shifting mechanism for shifting said platen
casing and platen to bring the latter into position to receive the impact of I
different types on a single type-bar and a locking lever independent of said shift
key platen casing and shifting mechanism, which locking lever is adapted to be
moved at each operation of the shifting mechanism and to cooperate with the
shifting mechanism to lock the same against vibration when the platen is moved.
2. In a typewriter, the combination of a paper platen, a shiftable platen casing
therefor a shift key and a cooperating platen supporting lever for shifting said
platen casing and platen to bring it into position to receive the impact of different
types on a single type bar, locking mechanism to retain the platen in a shifted
position to receive the impact of an upper case character, a locking lever inde-
pendent of said shift key platen casing and shifting mechanism and adapted to be 2
operated at each movement of the shift key and to move independently of the
shift key and means on said locking lever which cooperate with means on the
platen supporting lever to lock the same against vibration when the platen is
shifted.
3. In a typewriter, the combination of a paper platen, a shift key and a cooperat- 3
ing platen supporting lever for shifting said platen to bring it into position to
receive the impact of different types on a single type bar and a locking lever
adapted to be operated by the shift key at each operation thereof and to move
independently thereof, said locking lever being provided with means which are
adapted to cooperate with the platen supporting lever to lock the same against 3
vibration when the platen is in either the shifted or normal position.
4. In a typewriter, the combination of a paper platen, a shift key and a
cooperating platen supporting lever for shifting said platen to bring it into
position to receive the impact of different types on a single type bar and a
locking lever independent of the shift key and adapted to be operated at each 4
operation of the shift key, means on said locking lever which are adapted to
cooperate with the platen supporting lever to lock the same against vibration
when the platen is in either the normal or shifted position.
5. In a typewriter, the combination of a paper platen, a shift key and a
cooperating platen supporting lever for shifting said platen to bring it into 4
position to receive the impact of different types on a single type bar, a locking
lever movable independently of the shift key and adapted to be operated by said
shift key at each operation thereof and to engage the platen supporting lever to
lock the same against vibration when the platen is in either the normal or shifted
position and to automatically release the platen supporting lever when the shift
key is operated.
6. In a typewriter, the combination of a paper platen, a shift key and a
cooperating platen supporting lever for shifting said platen to bring it into
position to receive the impact of different types on a single type bar, an angular
locking stud on said platen supporting lever, a locking lever independent of said 5
shift key and adapted to be operated at each operation of said shift key, said locking

page_text: lever having a plurality of locking openings therein in which the stud on the
shifting lever is adapted to engage to prevent vibration of the platen supporting
lever in either the normal or shifted position and means for operating said locking
lever.
7. In a typewriter, the combination of a paper platen, a temporary and a per-
manent shift key, a platen supporting lever adapted to cooperate with one of said
shift keys for shifting said platen to bring it into position to receive the impact of
different types on a single type bar, a locking stud on said platen supporting lever,
a locking lever independent of the shift keys, said locking fever having a plurality
of locking openings therein in which the stud on the platen supporting lever is
adapted to engage to prevent vibration of the platen supporting lever and inter-
mediate mechanism between the shift keys and the locking lever, whereby motion
is communicated from either of the shift keys to the locking lever and the platen
is locked against vibration in the normal and shifted positions.
8. In a typewriter, the combination of a paper platen, temporary and permanent
platen shifting keys with their cooperating shifting means to bring the platen into
position to receive the impact of different types on a single type bar, securing
means cooperating with said permanent shifting key to maintain the platen in the
position to which it has been shifted and a locking lever cooperating with the
shifting means to prevent vibration when the platen is shifted.
9. In a typewriter, the combination of a paper platen, temporary and permanent
platen shifting keys with their cooperating shifting means to bring the platen into
position to receive the impact of different types on a single type bar, securing
means cooperating with said permanent shifting key to maintain the platen in the
position to which it has been shifted, a locking lever independent of the shifting
keys and cooperating with the shifting means to prevent vibration when the platen
is shifted and intermediate mechanism between the shifting keys and locking
lever to operate said locking lever.
10. In a typewriter, the combination of a paper platen, temporary and permanent
platen shifting keys with cooperating shifting means to bring the platen into
position to receive the impact of different types on a single type bar, securing
means cooperating with said permanent shifting key to maintain the platen in the
position to which it has been shifted, a locking lever independent of the shifting
keys and shifting means and mechanism cooperating with the shifting means to
prevent vibration when the platen is shifted and intermediate mechanism between
both of the shifting keys and the locking levers to bring about an operation of the
locking lever when either of the shifting keys is operated.
11. In a typewriter, the combination of a paper platen, temporary and permanent
platen shifting keys with cooperating shifting means to bring the platen into
position to receive the impact of different types on a single type bar, securing means"
cooperating with said permanent shifting key to maintain the platen in the
position to which it has been shifted, intermediate mechanism between the
temporary shifting key and the securing means for releasing the securing means
on the depression of the temporary shifting key and a locking lever cooperating
with the shifting means to prevent vibration when the platen is shifted.
12. In a typewriter, the combination of a paper platen, temporary and permanent
platen shifting keys with cooperating shifting means to bring the platen into
position to receive the impact of different types on a single type bar, securing
means cooperating with said permanent shifting key to maintain the platen in
the position to which it has been shifted, intermediate mechanism between the
temporary shifting key and the securing means for releasing the securing means
on the depression of the temporary shifting key, a locking lever independent of
the shifting means cooperating with the shifting means to prevent vibration when
the platen is shifted and intermediate mechanism between the shifting keys and
the locking lever to operate said locking lever.
13. In a typewriter, the combination of a paper platen, temporary and per-
manent platen shifting keys with cooperating shifting means to bring the platen

page_text: into position to receive the impact of different types on a single type bar, securing
means cooperating with said permanent shifting key to maintain the platen in the
position to which it has been shifted, intermediate mechanism between
the temporary shifting key and the securing means for releasing the
securing means on the depression of the temporary shifting key, a
locking lever independent of the shifting means cooperating with the
shifting means to prevent vibration when the platen is in the normal and
shifted positions and intermediate mechanism between both of the shifting keys
and the locking lever to bring about an operation of the locking lever when either
of the shifting keys is operated.
14. In a typewriter, the combination of a paper platen, a rail upon which said
platen is supported, levers supporting said rail, a shifting key to operate said
levers to move the platen and a locking lever independent of the shifting key and
supporting levers, said locking levers being adapted to be operated by the shift
key at each operation thereof and to cooperate with one of the supporting levers
to prevent vibration of the platen in the normal and shifted positions.
15. In a typewriter, the combination of a paper platen, a rail upon which said
platen is.supported, levers supporting said rail, one or more keys for shifting said
levers to move the platen, a locking lever independent of the shifting keys and
supporting levers and cooperating with one of the supporting levers to prevent
vibration of the platen and intermediate mechanism between the shifting key and
the locking lever, whereby a depression of a shifting key will shift the platen
and move the locking lever to lock the platen against vibration in the shifted
position..
16. In a typewriter, the combination of a paper platen, a rail upon which
said platen is supported, levers supporting said rail, a temporary and permanent
shifting key for shifting said supporting levers to move the platen, a locking
lever independent of the shifting keys and cooperating with one of the supporting
levers to prevent vibration of the platen, intermediate mechanism between the
shifting key and the locking lever, whereby a depression of a shifting key will
shift the platen and move the locking lever to lock the platen against vibration
in the shifted position, which mechanism consists of a rock shaft having a locking
pawl rigidly connected therewith which is adapted to retain the permanent shifting
key when the same is depressed and a rigidly connected bell crank lever cooperat-
ing with the temporary shifting key and with the locking lever.
17. The combination with a paper platen of independently movable parallel
shafts, a plurality of feed rollers, mounted on each of said shafts and means for
simultaneously throwing all of said feed rollers out of contact with the platen.
18. The combination with a paper platen of feed rollers, independent supports
for each set of said feed rollers, arms engaging the said supports, a longitudinally
movable rod upon which said arms are mounted and stationary cams cooperating
with said arms to simultaneously throw all of said feed rollers out of contact with
the. platen.
19. The combination with a paper platen, of feed rollers; a support for said
feed rollers, a moving arm or arms adapted to engage the feed roller support, a
longitudinally movable rod upon which said moving arm or arms are mounted
and a cam cooperating with the engaging arm or each of them to move the feed
rollers out of contact with the platen and means for moving said longitudinally
movable rod.
20. The combination with a paper platen of a removable spring-pressed pivoted
rod carried by the casing of said platen and an arm or finger rigidly connected
to and projecting from said rod intermediate of its ends and adapted to be normally
maintained adjacent to the platen by the spring-pressed rod to guide the paper on
the platen..
21. The combination with a paper platen of a removable spring-pressed rod
carried by the casing of said platen and adapted to oscillate in its bearings, a
projection extending from said rod at or near one end thereof, a spring adapted

page_text: to contact with said projection and an arm or finger projecting from said rod
intermediate of its ends and adapted to be normally maintained adjacent to the
platen by the spring bearing on the projection on the rod to guide the paper to
the platen.
22. In a typewriter, the combination with a movable carriage of a series of type
key levers, an adjustable line stop carried at the front of the machine, a scale
at the front of the machine and with which said line stop cooperates, means
controlled by the line stop for automatically locking said type key levers against
movement when the carriage reaches the line stop and hand operated means for
releasing said locking means.
23. In a typewriter, the combination with a movable carriage, of a series of
type key levers, an adjustable line stop carried at the front of the machine, a
scale carried at the front of the machine and with which said line stop cooperates,
means for locking said type key levers against movement, intermediate mechanism
between said locking means and line stop for automatically operating the locking
means when the carriage reaches the line stop and hand operated means for
operating the lerking means to release the same.
24. In a typewriter, the combination with a movable carriage, of a series of
type key levers, a vibrating adjustable line stop carried at the front of the
machine and adapted to be vibrated by said carriage, a scale carried at the front
of the machine and with which said line stop cooperates, means for locking the
type key levers against movement, intermediate mechanism between the vibrating
line stop and the locking means for automatically operating the locking means
when the line stop is vibrated and hand operated means for releasing the locking
means.
:
25. In a typewriter, the combination with a movable carriage, of a series of
type key levers each of which has a locking catch thereon, a vibrating line stop.
adapted to be vibrated by said carriage, à universal locking bar adapted to engage
the catches on the type key levers to maintain the same against movement, inter-
mediate mechanism between the vibrating line stop and the universal locking bar
for automatically operating the locking bar when the line stop is vibrated and hand
operated means for releasing the locking har from engagement with the type
key.levers.
r
26. In a typewriter, the combination with a movable carriage, of a series of type
key levers each of which has a locking catch thereon, a vibrating line stop adapted
to be vibrated by said carriage, a bell and means for sounding said bell by the
vibration of the line stop, a universal locking bar adapted to engage the catches
on the type key, levers to maintain the same against movement, intermediate
mechanism between the vibrating line stop and the universal locking bar for
automatically operating the locking bar when the line stop is vibrated and hand
operated means for releasing the locking bar from engagement with the type-
key levers.
:
27. In a typewriter, the combination with a movable carriage, of a series of
type key levers each of which has a locking catch thereon, an adjustable vibrating
line stop adapted to be vibrated by said carriage, a spring-pressed universal locking
bar normally maintained out of the path of the locking catches on the type key
levers; intermediate mechanism between the vibrating line stop and the universal
bar and a releasing button connected with said universal bar to throw the same out
of engagement after it has been automatically thrown into engagement by the "
line stop.
28. In a typewriter, the combination with a movable carriage, of a series of type
key levers each of which has a locking catch thereon; a vibrating line stop adapted
to be vibrated by said carriage, bell sounding mechanism adapteil to be operated by
said stop, a spring-pressed universal locking bar normally maintained out of the
path of the locking catches on the type key levers, intermediate mechanism between
the vibrating line stop and the universal bar to throw the same out of engagement

page_text: after it has been automatically thrown into engagement by the line stop without
effecting an operation of the bell sounding mechanism.
29. In a typewriter, the combination with a movable carriage, of a series of
type key levers, a vibrating line stop comprising a vibrating longitudinally
movable block, a spring-pressed pawl pivoted thereto, a rack adapted to vibrate
with said block and with which the pawl is adapted to engage, mechanism for
locking the type key levers against movement, intermediate mechanism between
said vibrating stop and locking mechanism to automatically operate the latter and
hand operated means for throwing said locking means out of operation to permit
one or more characters to be. added.
30. In a typewriter, the combination with a movable carriage, of a series of
type key levers, a rod, a rack adapted to vibrate on said rod and eccentric to the
axis thereof, a universal bar for locking the type key levers against movement, a
rocking arm connected with said universal bar, an arm depending from said
rack and carrying a pin which is adapted to engage the rocking arm of the
universal bar at its extreme movement and a vibrating line stop carried by and
longitudinally adjustable on said rod, said line stop comprising a longitudinally
movable block, a spring-pressed pivoted hand-operated pawl adapted to cooperate
with the rack and hand operated means for throwing the universal bar out of
the locking position after it has been automatically operated to permit one or
more characters to be added.
31. In a ribbon feeding mechanism, the combination of a ribbon spool, a
ratchet wheel, intermediate mechanism between said ribbon spool and ratchet
wheel for communicating motion from the ratchet wheel to the ribbon spool,
a movable pawl for engaging and moving said ratchet wheel and adjustable means
for disengaging the pawl from the ratchet wheel.
32. In a ribbon feeding mechanism, the combination of two ribbon spools,
two ratchet wheels, intermediate mechanism between each of said ribbon spools
and its ratchet wheel for communicating motion from the ratchet wheel to the
ribbon spool, a movable pawl for engaging and moving each of said ratchet wheels
and adjustable means for disengaging each of the pawls from its ratchet wheel.
33. In a ribbon feeding mechanism, the combination of two ribbon spools, two
ratchet wheels, intermediate mechanism between each of said ribbon spools and
its ratchet wheel for communicating motion from the ratchet wheel to the ribbon
spool, a movable pawl for engaging and moving each of said ratchet wheels,
adjustable mean for diengaging each of the pawls from its ratchet wheel, a non-
reciprocating pawl for each of said ratchet wheels and a pivoted lever upon which
said non-reciprocating pawls are mounted, whereby when one of said non-reci-
procating pawls is thrown into operation the other will be thrown out of operation.
34. In a ribbon feeding mechanism, the combination of two ribbon spools, two
ratchet wheels, intermediate mechanism between each of said ribbon spools and
its ratchet wheel for communicating motion from the ratchet wheel to the ribbon
spool, a movable pawl for engaging and moving each of said ratchet wheels,
adjustable means for disengaging each of the pawls from its ratchet wheel, a
non-reciprocating pawl for each of said ratchet wheels and a pivoted lever upon
which said non-reciprocating pawls are mounted, whereby when one of said non-
reciprocating pawls is thrown into operation the corresponding movable pawl will
likewise be thrown into operation and the other movable and non-reciprocating
pawl will be thrown out of operation.
35. In a typewriting machine, the combination with a ribbon spool of a casing
surrounding said spool circumferentially for at least a portion of the extent
thereof, whereby the ribbon is prevented from dropping from the spool, said
spool being removable from the casing.
36. In a typewriting machine, the combination with a ribbon spool, of a casing
fixed to the flaming of the machine and surrounding the spindle of said spool
circumferentially for at least a portion of the extent thereof, whereby the ribbon.

page_text: is prevented from dropping from the spool, said spool being removable from said
casing.
37. In a typewriting machine, the combination with a ribbon spool of a casing
surrounding said spool circumferentially for at least a portion of the extent
thereof, whereby the ribbon is prevented from dropping from the spool, said casing
being provided with an opening therein for the passage of the ribbon and said
spool being removable from said casing.
38. In a typewriting machine, the combination with a ribbon spool of a casing
surrounding said spool circumferentially for at least a portion of the extent thereof,
said casing being in the nature of a pocket in which the spool is adapted to
rotate whereby the ribbon is prevented from dropping from the spool, said spool
being removable from said casing.
39. In a typewriting machine, the combination with a ribbon spool of a casing
surrounding said spool circumferentially for at least a portion of the extent thereof
said spool being removable from said casing, a spindle adapted to pass through a
perforation in said casing, means for connecting the spool to rotate the said
spindle and means for rotating said spindle.
40. In a typewriting machine, the combination with a ribbon spool of a casing
surrounding said spool circumferentially for at least a portion of the extent
thereof, said casing being in the nature of a pocket in which said spool is adapted
to rotate and from which the spool may be removed, a spindle adapted to pass
through the perforation in the bottom of said pocket-like casing, means for connect
ing the spool to rotate with the said spindle and means for rotating said spindle.
Dated this 26th day of September 1899.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.