US2241867A - Typewriting machine - Google Patents

Description

Filed June 8, 1937 'T Sheets-Sheet 3?,

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ATTORN YS May 3133, iglfi.

P. s. RAND TYPEWRITING MACHINE Filed June 8, 1957 '7 Sheets-Sheet 2 INVENTOR. Phi/ b. 5. Rand ATTORN 5 May 13, 11.9 a P. s. RAND TYPEWRITING MACHINE Filed June 8, 1937 7 Sheets-Sheet 3 mu. .w 1 n INVENTOR.

Pail-1p 5. Hana! 93 w #%-ML ATTORNETS May 13, 1941. P, s. RAND TYPEWRITING MACHINE Filed June 8, 1937 7 Sheets-Sheet R O T m V W Phi Zip 5. Hand BY P. 5. HAND TYPEWRITING MACHINE May 13 394 Filed June 8, 1937 7 Sheets-Sheet 5 mam w 'INVENTOR. p/w'dzap S. Rama! v-% r u May 13, 19451: P. s. RAND z s TYPEWRITING MACHINE Filed June 8, 1957 7 Sheets-Sheet 6 0@0@0000 Q @QQQQQQQQ h L v 1 INVENTOR. P/ziif) s. Rand May 13, 51941. P. s. RAND TYPEWRITING MACHINE 7 Sheets-Sheet '7 Filed June 8, 1957 INVENTOR. Philla 5''. Hand ATTO 1 EYS Patented May 13, 1941 TYPEWRIT'ING MACHINE Philip S. Rand, Falmouth, Mass., assignor, by mesne assignments, to Remington Band 1110., Buffalo, N. Y., a corporation oi Delaware Application June 8, 1937, Serial No. 146,993

46 Claims.

This invention is directed to improvements in typewriting machines, and is more particularly concerned with improvements in the type action and type guide, especially for noiseless machines.

One of the main objects of the invention, generally stated, is to provide an improved typewriting machine in which guide links that support each type bar are controlled by the operation of a case shift key to efiect a shift from lower case to upper case printing.

Another important object of the invention is to eifect a shift of the type guide by the shift key in shifting from lower case to upper case printing.

An important object of the invention is to provide a coordinated structure in which the case shifting of the guide links for the type bars and the shifting of the type guide is simultaneously effected with a single shifting key.

Another object of the invention which is a result of the above objects is to effect this shifting action with a minimum of applied force to the shift key.

A further object of the invention is to provide a case shift construction of the general character hereinbefore indicated in which the parts are shifted with a uniform force irrespective of the force applied to the shift key.

A still further object of my invention is to convert an existing noiseless typewriting machine, such as the No. 10 Remington Noiseless machine, from a shifting platen machine to one in which the type bars receive case shifting movements without otherwise modifying the operation of the machine or detracting in any manner from the inherent advantages thereof or materially modifying the existing structural features thereof.

As will be apparent from the detailed description which follows, the invention also has for its object additional improvements which will become clear in themselves, and in their relationship to the complete combination.

This invention resides substantially in the combination, construction, arrangement and relative location of parts, all as will be explained below.

This application is a continuation in part of my co-pending application Serial No. 88,622, filed July 2, 1936, for Typewriting machine. The present case includes all claims which are common to the structure disclosed herein and in my earlier filed application Serial No. 88,622, the claims in application Serial No. 88,622 being restricted to the structure shown therein.

In the accompanying drawings in the several figures of which the same reference numerals have been employed to indicate the same or similar parts;

Figure l is a more or less central, vertical, sectional view in the direction of the length of the machine showing the parts of a central type action in normal position and other parts broken away or omitted;

Figure 2 is a similar view showing the type action in printing position under control of one of its printing keys and with the parts disposed in lower case position;

Figure 3 is a view similar to Figure 2 except that the parts are shown disposed as they appear when printing from an upper case type on the actuation of the same printin key;

Figure 4 is a view similar to Figure 3 except that the parts are shown disposed as they appear when printing an upper case character from the other printing key of the type action;

Figure 5 is a fragmentary, top plan view with some parts in cross-section of a part of the case shift mechanism and the means for moving the type guide;

Figure 6 is a front elevational, fragmentary view of some of the parts shown in Figure 5 and with some of such parts shown in section;

Figure 7 is a top plan view of the complete machine, with parts broken away;

Figure8 is a top plan view of one of the type blocks used in the machine of this invention;

Figure 9 is aside elevational view thereof; and

Figure 10 is a front elevational view thereof.

In the attached drawings there is only shown so much of a complete typewriting machine as is necessary to a full understanding of the improvements which comprise this invention. The particular typewriting machine illustrated in the drawings is that known in commerce as the No. 10 Remington Noiseless typewriter.

The machine illustrated is of the type having a standard keyboard of four banks of keys with each type bar carrying four types and being operated by either of two keys. Each pair of keys actuates a single front stroke end thrust type bar with a pressure imprint in a substantially noiseless manner to normally selectively print from one-or another lower case type on the type bar depending on which of the two keys is actuated, or to selectively print from one or amother upper case types on the same type bar after a relative case shift of the type bars has 2. been efiectedln accordance with the improved mechanism of this invention.

The mechanism of this invention is particularly characterized in the fact that neither the carriage nor the platen receives a case shiftin movement. The invention is thus characterized in that, instead of shifting the entire platen and carriage for this purpose, the pivotal supports for the guide links of all of the type bars are simultaneously shifted to condition the machine so that each type bar may travel over one of two separate paths under control of. each of its keys,

in order to selectively effect an imprint from any one of the four types on a particular bar.

In the mechanism disclosed. each type bar is capable of movement over four distinct and different paths of travel to the platen, and is selectively controlled to cause its movement over any one of these four paths, by operation of either of the'two printing keys which control that type bar in its lower case position, and

similarly by operation of either of the same keys in the upper case position of said type bar.

In view of the fact that the platen carriage does not shift, provision is made to cause a shift of the type guide to synchronize it with the case shifting movement of the type bars, in order to properly position the type guide for the shift mechanism.

The structure as disclosed includes the usual machine frame in which are contained the type actions and other elements of the machine. The

machine illustrated is of the form in which the type bars are arranged in a substantially horizontally disposed arc in front of and around the printing point as a center, so that each type bar moves with an end thrust on a pair of guide links but a short distance in a radial plane to the common printing center. It will be under- .stood that each type bar, except one or more 'at the center of the system, has beveled type faces to match the platen in angular path of movement of the type bar. The various operating parts of each type action except the key levers thereof move substantially in the same plane. The key levers are arranged in parallel planes and each moves in a plane corresponding to the plane of movement of the associated type bar or in a plane which intersects such a plane. In the last mentioned instance the connection between each key lever and the parts actuated thereby are arranged substantiallyat the line of intersection, as is well understood in the art. In this manner all side strain is avoided in each type action.

It is only necessary to a full understanding of this invention to specifically describe the construction and operation of a single type action since all the other type actions are similar thereto, except that they are mounted in different radial planes about the common printing center.

Referring to the drawings a portion of the frame base of the machine is illustrated at L The side plates of this frame, as is common, are interconnected by the cross braces or ties 2 and 3 which may be of any suitable size, form and construction to adapt them to incorporation with the complete mechanism. The platen and its position have been diagrammatically indicated at 4, the paper carriage having been omitted for the purpose of securing clarity in the drawings.

The two printing key levers which operate the type action illustrated are shown at 5 and B pivotally mounted at their rearward ends on a suitable support 8 mounted upon the tie 2. These levers 5 and 6 terminate at their other ends in finger keys 5. and 6 respectively to which the operating forces are applied. At 1 is the shift key lever which terminates onits forward end in a case shift key l The mounting and connection of the shift lever 1 withthe mechanism operated thereby will be hereinafter described.

The levers 5 and 6 are returned to and normally held in normal position as shown in Figure 1 by means of returning springs 9, each of which is adjustably connected at one end to the companion key lever and is anchored at its opposite end to a plate which in turn is connected to a longitudinally adjustable hook l0 mounted in the tie or cross bar 3. Nuts and lock nuts l0- are provided to adjust and hold the hooks in adjusted position and to vary the tension on the springs 9. Also supported upon the cross bar or tie 3 is a comb or guide plate H which is provided with slots, one for each 'of the key levers to cause them to operate in supstantially vertical planes. A similar support or guide for the shift key is shown at l2 attached to the frame of the machine.

An arcuate casting or support [3 which is attached to the frame of the machine extends in anarc of a circle across the front of the machine and provides a support for one end of each of the type action hangers l4. Each type action hanger is an irregularly shaped matel plate which is capable of receiving a sliding adjustment at one end on the casting l3 and at its,other end upon the support l5 which is likewise arcuate in shape. These hangers are supported on the members l3 and I5 so as to be capable of receiving a sliding longitudinal adjustment in radial planes towards and from the printing cenblocks, as is clear from Figure 1.

ter, each hanger being adjustable in the radial plane in which the associated type bar operates to regulate the pressure imprint on the platen. This radial adjustment is effected by means of an adjustable screw M cooperative with each hanger and threaded into a tapped opening in the support 13. Whenadjusted the hangers may be rigidly held in adjusted position by means of the set screws M, and clamping plates on which they bear.

A type bar is shown at [5, Its printing end is bifurcated and has secured thereto two type The upper type block is provided with types I 5 and I5", and the lower block is provided with types i5 and IS. The types [5 and I 5 are for printing upper case characters while the types I 5 and l5 are for printing lowercase characters or symbols. These type blocks are arranged so that the printing faces of the types thereon lie in converging planes, as is clear from Figure l. The type bars are guided for movement, in the radial planes in which they lie, by means of a double are shaped guide comb E1, in the slots in which the type bars with their tail pieces l5 have a sliding movement. The comb I! may be a part of or separate from the cover 16 arranged to enclose with it all the type actions of the machine. These members are supported in any suitable manner from the frame of the machine. The type bars are also guided from below by the arc shaped comb I 6' on the support i.

Each type bar i5 is supported for its radial movement upon a pair of guide links l9 and I9 which are each pivoted at their upper ends to the type bar by means of the pivot pins and 22 respectively. The lower end of guide link is is pivotally mounted on the pivot pin 2| carried by a lever 21. At la is a flat spring riveted to the link 3 at l8 and arranged so that its free end engages the pivot pin 2| to hold the lever la in place on the lever 21. The lower end of the guide link I9 is pivotally supported at 23 on an arm 24 which in turn is pivotally supported at 25 on the hanger l4. The upper end of the arm 24 engages a small adjustable eccentric 25 supported on the hanger, so that when it is rotated the lower end of lever 24 may be swung about the pivot pin 26 to adjustably position the pivot 23 of the forward guide link l9.

The small lever 21 for each type action is pivotally mounted at 28 on a case shiftable lever or support 29 which has a rearwardly extending arm 30. Each lever 29 and its arm 30 is arranged substantially in the same radial plane as the associated type bar l5 and the rear enlarged terminal portion of each arm 39 is received in the space between upper and lower plates 3| of an arcuate shiftable member 3| and in a slot in the front face thereof. The member 3| is fixedly mounted upon and moves with the type guide supporting frame 9|, as is clear from Figures 1, 5 and 6. The arm 30 of each type action fits in one of the slots in the member 3| so as to be supported thereby and yet is free to be adjusted with the associated hanger '84 in the plane of movement of the associated type action as will hereinafter more clearly appear.

Each layer 29 is pivotally supported at 32 upon the lower end of an L-shaped bracket 33. This bracket is provided with elongated slots in which the pins 34 and 35, mounted on the hanger i4, lie. At 36 is an eccentric mounted on the associated hanger l4 and engaging the bracket 33, so that when it is adjusted this bracket may be caused to slide towards and away from the platen substantially in the plane of the hanger, thereby radially shifting the pivot point 32 as well as the lever 29 and the parts connected thereto. It is partly because of this necessary adjustment that the arm 30 has a sliding engagement with the support 3|.

In each type action the lever 21 is pivotally connected at 31 to one end of a link 38 which at its opposite end is pivotally connected at 39 to an L-shaped type bar actuating lever 40 provided with a curved contact tread and which lever is pivotally supported at 4| on the companion hanger M. It will be noted that the lever 2'1 is so shaped that the pivot pins 2| and 31 are on opposite sides of the pivot pin 28 on which lever 21 is supported. The lever 40 is provided with an enlarged hole in which a fixed stop pin 42, mounted on the hanger i4, lies. This stop pin coacts with the walls of the hole in the lever to limit the movement of the lever in both directions. A link 44 is pivotally connected to the member 46 at 43 and to the key lever 5 at 45. A flat spring 46 is pivotally mounted on the lever 5 and arranged to overlie the pivot 45 and hold link 44 in place. The lever 46 has a right angle lug 4|! positioned to engage the top of the extending ear 44 of link 44 when the machine is at rest. The pivot pin 43 lies in an elongated slot in link 44, the axis of which is inclined to the horizontal, as is clear in Figure 1. The purpose of this construction will be described later.

A second combined L-shaped actuating lever 41 with a curved contact tread, similar in function to the member .40, is pivotally mounted on the opposite side of the companion hanger H on the pivot pin 4|. Member 41 is providedwith a notch 41' in which a sleeve 26', mounted on pivot pin 26, lies, to act as a limiting stop for member 41. The member 41 is pivotally connected at 49 to link 49 which in turn is pivotally connected at 50 to a lever 5| which is pivotally supported at 52 on the hanger l4. The lever 5| has an arm 53 which lies in a plane parallel to the arm connected to link 49, but extending in a direction almost at right angles thereto. This arm 53 is positioned to be engageable with the surface 49" (see Figures 1 and 4) of member 40, for purposes which will hereinafter appear. The member 41 is pivotally connected at 54 to a link 55 pivotally connected at 56 to the key lever 6, as is clear from Figure 2. The link 55 is held in place on lever 6 by a spring similar to the spring 46.

Pivotally mounted on a depending portion of the hanger 64 at 58 is a sub-lever 59 which has a rearwardly extending cam piece or curved tread 51 of a width suflicient to be engaged by the cam portions or curved treads of both the members or levers 46 and 41. The lever 59 has a forwardly extending portion 51 adapted to engage a stop |4 on the associated hanger i4 and limit the actuating movement of said lever as shown in Figure 4. The upper end of lever 59 is pivotally connected at 56 to the momentum accumulator or weighted member 6|, which may be of any suitable construction as commonly employed in noiseless typewriting machines. The momentum accumulator 5| has an arm portion 6| (see Figure 1) which in the normal disposition of the parts extends rearward and is pivotally connected at 62 to a" lever or toggle member 63 which is pivotally mounted at 64 on the hanger l4. The lever 53 is made up from duplicate united members so that such members are pivotally mounted on opposite sides of the hanger 4 which is in the form of a comparatively thin plate, and so that the rearward extension 6| 5 of the momentum accumulator 6| lies between the two members of the lever 63. One end of a link 12 is received between the two members of the lever 63 at the upper ends thereof and is pivoted thereto at 1|. The other end of the link 12 is pivoted at 22 to the type bar and by the same pivot which connects the link IE to the type bar. Link 12 comprises a pair of spaced bars held together and spaced apart by a shouldered rivet 18 and engaging the type bar l5 at pivot 22 on opposite faces.

Pivotally connected to the momentum accumulator 6| at 65 is a link 65 which is pivotally connected at 66 to a link 69 which in turn is pivotally connected to the hanger M at 19. Link 65 has a forwardly extending projection positioned to engage a projecting stop pin 61 on the momentum accumulator. These devices constitute well known means for preventing rebound of the parts of the type action from normal position as they return from actuated position and as is disclosed in Patent No. 1,604,640.

The portion of the mechanism comprising the members 12, 63, 59, 6| provides a well known form of double toggle arrangement of the type action by means of which the type bar is actuated and controlled to effect noiseless pressure imprint as in the above mentioned No. Item- I fington Noiseless machine.

A bifurcated depending member I4 is pivotally mounted at on each of the levers 59. A returning spring interconnects the pivot pin 15 and the hanger l4 so as to aid in returning parts of a fixed part of the machine.

the companion type action to normal position as shown in Figure 1. The forked end of the member 14 is positioned to engage the segmental universal bar I1 which controls the escapement (not shown) for the platen carriage. This universal bar is pivotally supported from the cast- I ing |3 by means of parallel links 18 in accordance with one form of practice common in the art.

' From an inspection of Figures 1 and 5, it will be seen that the case shift lever I rests upon the shaft 19 which extends between the side plates of the frame I and is pivotally mountedon the pivot screws 80. Lever engages the shaft 19 in back of the end connected by screw 82 to the arm 8| on shaft 19, see Figure 5. A T-shaped lever 83 is mounted on shaft 19 and is clamped by the screw 02 to the arm 8| for movement with it, see Figure 1. One arm of the head of T-shaped lever 83 is-connected to a spring 83 and its other arm is pivotally connected to a link 84. This I link has a lost motion connection with a bellcrank lever 85 forming part of a spider or rocking frame 86. The spider is pivotally supported on the main frame by means of pivot pins 81. A spring 85 is connected to the other arm'of the bellcrank lever .85. The lever 83 has a slot through which the screw 82 passes to permit of adjustment of the parts to properly position the lever 'I after assembly thereof.

The spider is provided with rearwardly extending parallel arms 88 which lie substantially horizontal. Pivotally mounted on the ends of these arms by means of the pivot pins 90 is the type guide frame 9|. As noted above it is on this frame that the arcuate supporting member 3| is mounted. The frame 9| extends substantially vertically and is provided with a cross connecting piece 92 on which the type guide 93 is detachably secured by means of screws 93*. The type guide 93 is arranged to have three pairs of type guiding lugs 93', 93 and 93 see Figure 6, vertically aligned for cooperation with similarly arranged guides on the type blocks, as will be explained later. In-addition upper and lower lips 93 and 93 are provided on the type guide to provide positive up and down alignment of the type block at the time of printing.

Seated in recesses in the ends of the cross piece 9| are bearing pieces 94 which are provided with vertical V-shaped grooves or race-Ways on the outer faces thereof. These grooves are positioned opposite similarly shaped raceways or grooves in the bearing blocks 95 adjustably mounted on a fixed part of the machine. Each of these blocks is provided with a horizontally disposed slot through which extends the stem of a screw 96 threaded into a tapped opening in Contacting the ends of the blocks 95 are the adjustable eccentries 91 which coact with and cause or afiord longitudinal adjustment of the blocks on the screws 96 towards and away from the bearing pieces 94. Mounted in the space formed by the pairs of opposed V-shaped grooves in the members 94 and 95 are the anti-friction bearing balls 98. Top and bottom walls 9 extend across the race-ways in the bearing pieces 94 and prevent the balls 98 from being dislodged from or dropping outof the associated race-ways. An arm 99 is mounted upon the transverse member 92 and is provided with an adjustable stop screw I00 positioned to engage the adjacent block 95 or a suitable relatively fixed part of themachine and limit the downward case shifting movement of the frame 9| and the parts carried thereby. Supported from any adjacent fixed part of the machine isanother arm 99 which is provided with an adjustable stop screw |00"positioned to normally engage the frame 9| on the top thereof and limit the upward case shifting movement of the frame 9| and the parts carried thereby to normal position.

There is provided the usual case shift lock mechanism comprising a case shift key I02 piv-' oted on the case shift key lever I and controlling a locking lever I02. The hook-like end of this last mentioned lever is adapted to engage under the lower edge of the comb plate l2 when the lever is depressed by the key I02 and thus retain said lever 'l and the parts controlled thereby in the upper case position. The locking lever is released in .the usual manner by pressure exerted on the case shift key l A considerable portion of the noiseless type action herein disclosed is described in a number of prior issued patents of which Patent No. 1,573,544, dated February 16, 1926, is the most closely related. Since the operation of the type action disclosed herein is the same, with'the exception of the differences to be noted below, as

that set forth in the above mentioned patent, it is believed that it is not necessary to repeat it here for a full understanding of the invention herein disclosed.

In the patented structure the lower end of the arm corresponding to the arm 40 in this disclosure extends towards and is pivotally connected by a short link to the lever 21. In the patented disclosure this lever 21 is pivotally mounted to turn on a fixed center, being pivoted directly on the end of an arm corresponding to the adjustable bracket 33 in the present construction. Thus in this structure one of the differences over the patented structure is that the lever 21 in the present construction is pivotally mounted for type shifting movement upon the supporting lever 29,'which in turn is pivotally connected to the arm 33 for case shifting movement. The actuating lever 40 is pivotally connected to lever 21 by a relatively long link 38 which during the case shifting movement of the parts receives a swinging movement around its pivot 39 with the lever 40 without disturbing the latter or the parts controlled thereby. In this arrangement each lever 29 is provided with the extension 30 not present in the patented arrangement, interconnecting the various type actions with the case shift frame 9| and the shiftable'type guide, a feature not disclosed in the above mentioned patent. It is by means of these and other changes in structure that the objects of the present invention are secured of converting the shiftable platen noiseless machine of the patent mto one in which the type bars receive case shifting movement and without in any mannermodifying the operation of the parts to effect position are turned upwardly by spring 85 when released by the depression of the shifting lever I.

The operator supplies none of the actuating force for that upward movement. No matter how hard lever i is struck the mechanism is always shifted with the same force, that is, the force supplied by spring 85 Therefore, it requires but a very light pressure on the case shift key to effect a shift of the type bars.

In the operation of the mechanism herein disclosed downward movement of printing key lever carries with it link M causing the L-shaped actuating lever 40 to pivot about its support M. The curved tread of lever 40 engages the curved tread on top of arm 51, causing lever 59 to pivot about its support 58 with a highly but gradually accelerated motion. The initial movement of link 44 causes its upper end to shift downwardly and to the right, see Figures 1 and 2, because of the slotted connection at pin 43 and its inclination. This moves the ear 44 out from under the locking lug 40 permitting the above mentioned movement of lever 48.

From a consideration of Figure 2, it will be understood that the depression of the key 5 is arrested by a forward wall of the aperture in the associated lever 40 contacting the stop pin @2. It also will be understood that this arrest of the lever 48 andassociated link M and key lever 5 is efiected before the lever 59 and .the parts controlled thereby have completed their printing movement. The completion of such movement after the stop B2 is engaged is brought about by the momentum accumulator 6! in the usual man-- her, and as will hereinafter more clearly appear.

The clockwise movement of the lever 59 from the position shown in Figure 1 to that shown in Figure 2 results in bringing the upright toggle arm of the lever 59 and toggle link ti into a substantially straight line position. The force thus exerted by this initial toggle on the secondary toggle members 63 and i2, together with the action of the momentum accumulator, brings the last mentioned toggle members into a substantially straight line position and results in moving the type bar endwise on its guide links l8 and I9 to the printing position. Due to the approach of the toggles at the last portion of the printing movement substantially to straight line positions the movement of type bar will be slowed down or decelerated and efiect a substantially noiseless pressure imprint instead of a hammer blow.

As the parts of the type action, move in the manner described the momentum]; accumulator 5! will be caused to swing from the Figure 1 to the Figure 2 position. The first portion of this movement of the momentum accumulator is positively effected by the depression of the key 5*. When this key reaches the Figure 2 position, the lever ill is arrested by the stop 42 but the lever 59 and the parts connected therewith continue their independent printing movement under the control of stored energy of the momentum accumulator 6! which completes such printing movement and efiects an imprint from a lower case type i5 as theparts are shown disposed in Figure 2. This type may be said to represent the lower case letter y for example. It will be observed that during the operation of the type action under control of the printingkey 5 just described, the pivotal support 2| for the guide link I 8 was lowered from the Figure 1 to the Figure 2 position due to the connection 38 between of movement of the type bar to bring the type 95 to the printing point.'

tinuing their movement to printing position under their own momentum and under control of the associated momentum accumulator 6i .to effect an imprint of, say, the lower case letter b" from the type l5.

During the depression of the key 6 as just described the associated guide link I8 turns on its pivot 2! while the lever 21 which carries said pivot remains at rest in the Figuer 4 position. It will be seen, therefore, that the type bar under the depression of the key 6 receives a dlfferent path of movement than it does when actuated by the key 5 During the actuation of lever B and the connected parts the ear 44 of the associated action remains under the lug 40, Figure 4, preventing mechanism actuated by levers 5 and 46 from having any movement whatever. forces involved in the actuation of the type bar by means of lever B and interconnecting linkage would set up a train of reaction forces traveling through links I8, 2'! and 38, causin a slight shifting movement of the pivot pin 2|. Obviously, any movement ofthe pin 2! would shift the type bar being used with respect to the printthe levers Z'i and 40, thereby changing the path ing center, resulting in a misalignment of theprinted characters by either an improper entrance of the type block in the center guide with a resultant noise and/or a winking of the other key lever 5 and the key 5 on the keyboard.

Now, in order.to bring about an imprint from the upper case Y and B from the types l5 and I 5' respectively, under control of the respective printing keys 5 and 6*, it is merely necessary to depress the case shift key I or I02 and hold it depressed while actuating the printing key. This results in a counterclockwise rocking movement of shaft 19 by reason of its connection to arm 8|. This rocking movement of shaft '19 is accompanied by a similar movement of lever 83, tensioning spring 83 and moving the link 84 upwardly. The upper end of this link can. have relative movement with respect to the bellcrank because of the slotted or lost motion connection thereto. This movement of lever 84 releases the bellcrank 85 so that spring 85*- through it may rotate the shaft 86 so that the frame 88 at its right hand end (as the parts are viewed in Figure l for example) may swing upwardly, carrying with it the case shift frame 9!, the type guide 93, and the member 3|. This movement continues until arrested by the engagement of stop I88 with the associated surface on the frame 9!. The result of the movement of the member 3i is a re-positioning of the pivot pins 28 by reason of the connection thereto of the levers 29. The upward movement of the pivot pins 28 carries the levers 2i upwardly as well as the pivot pins 31 and 2!. There is, of course, the necessary relative pivotal movement between the levers 21 and the links 38 and i8 connected thereto to enable the shifting of the type bars to the new position to be effected. The type guide by its upward movement is re-positioned to properly coact with the type blocks as they move to the common printing center over new paths of movement for upper case printing.

If this locking device were not used the guide moves. This is an important factor in the construction as shown in the present instance in order that the type guide may properly coact with one or another of the type blocks in their diii'erent paths of movement whether printing lower or upper case characters. It should be noted that the character of the type guide is such that it coacts with the type blocks to insure the guiding thereof into engagement with the platen at the printing center in proper position. Accomplishment of this object is further aided by the particular construction of the type blocks as will be described later. The case shift mechanism is so constructed, as will be ap-' parent from the above, that the parts are always shifted with the same force caused by the spring 85, regardless of how hard the shift leverl is struck.

When the shift lever is released it is returned to normal position by spring 83, the force of the spring 83 thereby enabling spring 85'- to exert its force to shift the type guide and all of the interconnected mechanism upwardly to position the parts for upper case printing. From this position each type bar is advanced to the printing center as hereinbefore explained by the actuation of either of its keys 5 or 6 Let us assume that a shift key is either held or locked in the depressed position, and a key 5 is depressed. The mechanism functions somewhat as previously described in connection with the operation of the key lever 5 for lower case printing, except that the type bar moves over another path to press the type I5 against the platen as shown in Figure 3. The first part of the movement of the mechanism causes the forward end of the type bar to elevate slightly after which it moves along towards the printing center. This path of movement is different from the two previously described when writing lower case characters because of the fact that the pivot point 28 on lever 21 has been elevated due to the depression of a shift key.

When a shift key is held or locked in the depressed position and a key 6 is actuated the rear end of the associated type bar moves upwardly and rearwardly along still another path of movement to the printing center to print, say upper case character B from type I5 In this operation the lever 21 remains fixed on its pivot 28 though said lever and the'pivot center 2| have been raised by the operation of the shift key, as distinguished from the prior operation for upper case printing by key lever 5 where the pivot point 2i swings about the raised pivot center 28.

For upper case printing the locking lug 40 and the locking ear cooperate as before, When the lever 5 is actuated they disengage to free the mechanism for actuation thereby. When lever 5 is actuated they remain in engagement to prevent the slight shifting of the pivot points H It is to be recalled, of course, that on a com-- plete machine. the depression of the shift key causes all of the pivot centers 28 for all of the type actions to be simultaneously raised so that with a single shift key all upper case characters for the entire machine may be printed. When the shift key is released all of the pivot centers 28 return to normal position as the type guide is moved back to its original position. This return of the type guide and the type action to normal position is caused by spring 83 which overcomes the force of the spring and swings the lever 83 .at its upper end in a. clockwise direction, lowering the free ends of the type bars and the type guide.

From the foregoing description it will be seen that the depression of either shift key 1 or I82 is effective to release the force of the spring 83, thereby enabling the force of spring 85 to raise the parts for upper case printing. It will be understood, therefore, that such parts will always shift for upper case printing with the same force (of the spring 85) because of the release of the spring 83 and the slotted connection between the bellcrank 85 and the link 84 which is actuated by the shift lever. 0n the return stroke the parts are caused to'move by the force of gravity as well as by spring 83.

case shift lever is transmitted to the shiftable parts. Furthermore, this construction provides an extremely light case shift mechanism requiring but little force on the case shift lever to effect a case shifting of the parts.

It will be noted from the above description that each type bar carries four types and is selectively operable by either of two printing keys and with the aid of the case shift mechanism may be caused to advance to the common printing center in four distinct and different paths so as to bring each of the four printing characters on the type bar into contact with the platen as described. For emphasis it is again noted that when key lever 5 is depressed for lower case printing, pivot 28 remains fixed in its lowered position, and pivot 2I swings about the pivot 28 at the same time that the guide link [8 is moving rearwardly. Operation of the key lever 6 for lower case printing causes guide link I8 to swing about pivot 2| which in this case remains fixed.

For upper case printing pivot point 28 is first raised under control of the case shift key lever, and when lever 5 is operated pivot point 2| swings around the raised pivot point 28 as guide link I8 moves rearward. For upper case printing with lever 6, pivot point 2| remains fixed, although raised along with pivot point 28 because the shift lever has been operated.

The above description brings out also the interconnection between the operation of the type guide and the raising of the pivot points 28, and

emphasizes the advantage of the construction involving the raising of the pivot points 28 and the rear ends only of all the type bars rather than shifting the entire platen and/or carriage or bodily shifting the entire set of type bars to produce a relative case shift.

The engagement of the stop screws I08 and I00 with their cooperating stop surfaces always with the same force is now apparent. When the shift In'other words, none of the force exerted by the operator on the hey is depressed the type guide frame is released for operation by the spring-85' so that it is raised thereby and the stop screw led always strikes the cooperative stop surface with the same force. Upon the return stroke when the shift key is released the efiective force of spring 88 is released on the parts and spring 83 together with the force of gravity always exerts the same force to return the type guide frame and the free ends of the type bars to normal or lower case position, so that the stop screw Mil ees the coacting stop surface on the top of the frame with always the same force.

As a matter of comparison, it is pointed out that the weight of the mechanism of this invention which has to be moved, is less than in the shifting platen machines to the extent that only about one-third the energy is necessary to eflect case shifting movement the type bars.

It has been hereinbefore explained that the arm 53 is adapted to engage the surface til of themember 453 (see Figures 1 and e). The purpose of this construction is the same as that disclosed in the above mentioned Patent No. 1,573,544, that is, to fully restore parts under control of the key lever 5 to no position, such restoration being effected on the first actuation of the companion key lever t which results in operating the lever 50. It may be here notedthat the downward movement of arm at of each type action carries the forked member M downwardly with it, engaging the segmental universal bar ll, causing an actuation of the escapement at the proper time so as to advance the carriage in the usual manner.

There is illustrated in Figures 8, 9 and 10, one.

of the type blocks essential to the accurate operation of a machine of this type. Because of the fact that each type bar must operate about a pivot center (pivot pins H) which is shifted, as explained above, it is necessary to employ a particular construction in the type blocks. If the efiect of this movement is visualized the necemity for this particular construction will be apparent. The type bars for lower case print ingapproach the printing center with a movement which has a downward component in planes to one side or the other of the printing center (excepting the central type bar directly in front of the printing center). The result is that the vertical axis of each printing character type block indicated at ill provides the body of which the type characters and the guides are formed. The sides of these body portions are provided with the guiding surfaces H2, H3 and Q. The areas for the type are indicatedat I5" ing center with a movement which has an upward component so that the vertical axis of each type character must be displaced to the opposite side of the vertical. By this arrangement at the time the type bar engages the platen it has been rotated back through the small vertical angle of displacement so that its vertical axis coincides with the vertical central axis of the printing area. 1

Figure 8 shows one of the type blocks intended to be used on one of the type bars around towards the left side of the machine. Those to be used on the right side will, of course, be re- As is clear from Figure 9, the planes of the type areas and it on each type bar lie at angles which intersect, as indicated by the curved dot-dash lines in this figure. This construction is necessary in view of the fact that the'type bars receive pivotal case shifting movement as pointed out above, and by arranging the planes of the type character areas as shown the types will be accurately impressed on the platen for both upper and lower case printing. It is also apparent from Figure 9 that these areas are longitudinally curved, so that the type will accurately coincide with the curvature of the platen.

It is noted first that the guide surfaces on each type block cooperate with the pairs of guiding lugs or surfaces 93 93 and 93 on the center guide in the manner illustrated in Figures 1 to 4 inclusive, reference also being made particularly to Figure 6. Thus, in the position of the parts shown in Figure 2 the upper pairs H2 and H3 cooperate with the lugs or surfaces 93- and 93. As shown in Figure 3, the pairs of guiding surfaces l l3 and lid cooperate with the pairs of lugs or surfaces 93 and 93. These pairs of lugs or surfaces insure lateral alignment of the type ,bars at the printing center at the time of printing while the lips 93 and 93 insure vertical alignment.

The vertical central axes of the type character areas Q5 and it, as shown at D and E, respectively, are at a small vertical angle with respect to a. vertical line through the horizontal center of the body portion iii of the type block. This vertical line is shown at C. This slight angular rotation of the type character areas varies for the difi'erent type bars. It is largest on the type bars at the extreme left and right. and diminishes towards the center of the machine, as will be apparent to those skilled inthe art. This slight displacement is necessary to compensate for the fact that the type blocks in moving towards the printing center about the pivot pins 26 in their two case positions results in a slight rotation of the type block as explained above. These angular displacements are in an amount and a direction such that this rotation is compensated for so that the longitudinal axis of each type character at the time it engages the platen at the printing center, is exactly vertical. The type guide insures that the type blocks are properly positioned vertically and laterally and move into contact with the platen thus accurately positioned.

It is noted, as is clear from Figure 9, that the type character areas are longitudinally curved, as is well known in the art, to conform to the curvatureof the platen. I

The above description is sufiicient for a full understanding of the improvements comprising the present invention since the remainder of the mechanism, as pointed out above, operates substantially the same as the similar mechanism described in the above mentioned Patent No. 1,573,-

54 4, and in said No. 10 Remington Noiseless machine. It is of course apparent to those familiar with typewriting machines of this nature that the remainder of the mechanism which goes to make up a complete typewriting machine may be operatively associated with the mechanism herein disclosed. Therefore, it will be seen that by my invention I am enabled to readily convert an existing machine, such as that referred to above, with but few changes in its existing structure, into a highly eflicient case shifting type bar machine without otherwise interferingwith the usual operation of the machine and the characteristic advantages derived therefrom.

It will be readily apparent to those skilled in this art that the particular manner of constructing a mechanism in accordance with this invention, as herein disclosed, may be readily varied without departure from the true scope of the invention. I do not, therefore, desire to be limited to the particular form of apparatus herein employed for purposes of illustrating the invention, but rather to the scope of the appended claims.

What I seek to secure by United States Letters Patent is:

1. In a typewriting machine the combination comprising a type action including a type bar having four type characters thereon, a pair of independently movable key levers, means for operatively connecting each of the key levers to the type bar for selectively actuating it to move through either of two paths to a common printing center, case shifting means for positioning the type bars for movement through two additional paths when operated by said key levers, and means for locking the connecting means for one of the key levers against movement when the type bar is actuated by the other key lever.

2. In a typewriting machine the combination comprising a type action including a type bar having four type characters thereon, a pair of independently movable key levers, means for operatively connecting each of the key levers to the type bar for selectively actuating it to move through either of two paths to a. common printing center, case shifting means for positioning the type bars for movement through two additional paths when operated by said key levers, and means for locking the connecting means for one of the key levers against movement when the type bar is actuated by the other key lever for either position of the type bar.

3. In a typewriting machine the combination .comprising a type bar, means for pivotally supporting the type bar, means for shifting the pivotal support of the type bar, the position of the pivotal support determining whether upper or lower case printing is to be efiected, a pair of independently movable key levers, means for operatively connecting each of the key levers to the eratively connecting each of the key levers to the type bar whereby it may be selectively operated, and means for locking the connecting means for one of the key levers against move ment when the type bar is actuated by the other key lever for either position of the pivotal support. I

5. In a typewriting machine a series of type actions each including a type bar having four types thereon, pivotally mounted means for supporting each of said type bars, a pair of printing levers for each type bar, means for independently connecting each type bar to a pair of printing levers, case shifting means coacting with said pivotally mounted means to position it, whereby the type bar may be selectively operated by the printing levers connected thereto to move it over any one of four different paths, and means for locking said connecting means for one of the printing levers against movement when the other printing lever is operated to prevent pivotal movement of said pivotally mounted means.

6. In a typewriting machine a type action therefor including a type bar having a plurality of type thereon, a case shiftable link for pivotally supporting the type bar, a pair of printing keys for independently operating the type bar to move it over two difierent paths upon selective operation of said printing keys, case shifting means for shifting the pivotal center of said link to further change the paths of movement of said type bar, and means for preventing movement of the pivotal center of the shiftable link during actuation of the type bar by one of said printing keys for either position of the pivotal center.

7. Ina typewriting machine and the like havmg a series of type actions each comprising a supporting bracket, a case shiftable member mounted on said bracket, 2. type bar pivotally mounted on said member and bracket, said type bar having four types thereon, case shifting means for shifting said member, a pair of selectively operable keys independently and operatively connected to said type bar, whereby the type bar may be moved over four distinct paths to selectively present the type thereon to a common printing point, and means for holding said member against movement by the reaction forces when one of said keys is operated for either Position of said member.

8. In a typewriting machine the combination comprising a time bar, a shiftable member for pivotally supporting the type bar, a shiftable type guide, means interconnecting said member with said guide, a pair of selectively operable printing keys independently connected to said type bar, case shifting means controlling said shiftable member and type guide, whereby the type bar is moved over two separate paths to the type guide for one position of the type guide and over two other paths for the other position of the type guide, and means for preventing movement of said shiftable member in either of its positions when the type bar is actuated by one of said keys.

9. In a typewriting machine the combination comprising a type bar having a plurality of type thereon, a shiftable support, a lever on the support and connected to said type bar, a movable type guide, means interconnecting said shiftable support with the type guide, case shifting means for moving the type guide and shiftable support from normal position to another position, a pair of printing keys connected to the type bar for selectively moving it through different paths, and

means for locking the lever against movement by the reaction forces when one of said keys is actuated.

10. In a typewriting machine the combination comprising a type guide movable from one to another position, a type bar having a plurality of type thereon, a guide link pivotally supporting the type bar, case shifting means for shifting the pivotal center of said guide link, means for connecting said guide link and type guide to move together in their case shifting movements, a pair of selectively operable keys operatively connected to the type bar toeffect movement thereof over any one of a plurality of paths to the type guide for either position of the latter, and locking means for preventing shifting of the pivotal center of said guide link when the type bar is actuated by one of said keys.

11. In a typewriting machine the combination comprising a hanger, a type bar, a link pivotally supporting the type bar, a case shiftable member pivotally supported on the hanger, a lever pivotally interconnecting said case shiftable member with the type bar, a movable type guide, means for interconnecting the type guide with said case shifting member, a case shift lever, means controlled thereby for shifting said case shiftable member and type guide, a plurality of selectively operable keys for effecting movement of the type bar, and means for locking one of said keys against movement due to actuation of the type bar by another of said keys.

12. In a typewriting machine the combination comprising a type bar, a plurality of guide links on which said type bar is pivotally supported for movement to and from printing position, a pair of selectively operable keys for independently operating the type bar, case shifting means for shifting the pivotal center of one of said links to change from lower to upper case printing, and means for preventing movement of the pivotal center during operation of the type bar by one of said keys for both upper and lower case printing.

13. In a type action for a typewriting machine the combination of a type bar having a plurality of types thereon, two printing keys, 'means for connecting each of said keys with the type bar, a type bar supporting member, a case shiftable support on which said type bar supporting member is pivoted, and means for locking said supporting member against any movement during actuation of the type bar by one of said printing keys.

14. In a type action for a typewriting machine, the combination of a type bar having a plurality of types thereon, two printing keys, means for connecting each of said keys with the type bar, a type bar supporting member, a case shiftable support on which said type bar supporting member is pivoted, case shifting mechanism for shifting said support, and means for locking said supporting member against pivotal movement in either position of said case shiftable member by actuation of the type bar by one of said printing keys.

15. In a typewriting machine or the like, a type action including a type bar, a pair of guide links pivotally connected thereto, a relatively fixed pivot and a movable member, one of said guide links being pivotally mounted on the relatively fixed pivot, and the other of said guide links being pivotally mounted upon the movable member, a case shiftable support upon which said movable member is pivotally mounted, a

movable type guide, means interconnecting said shiftable support with said guide, a plurality of printing keys for selectively operating the type bar, whereby the type bar in its printing operation moves through different paths depending on the printing key actuated and theposition of the case shiftable support, and means for looking said movable member against pivotal move-- ment in either case position upon actuation of the type bar by one of the printing keys.

16. In a typewriting machine or the like, a type action including a type bar, a pair of guide links pivotally connected thereto, a relatively fixed pivot and a movable member, one of said guide links being pivotally mounted on the relatively fixed pivot and the other of said guide links being pivotally mounted upon the movable member, a case shiftable support upon which said movable member is pivotally mounted, a.

movable type guide, means interconnecting said shiftable support with said guide, a plurality of printing keys for selectively operating the type bar, whereby the type bar in its printing operation moves through diiierent paths depending on the printing key actuated and the position of the case shiftable support, and means for locking said movable member against movement while in either case position upon actuation of the type bar by one of the printing keys, said locking means being released upon actuation of the type bar by another of said keys.

17. The combination of a series of type bars, a pair of guide links supporting each type bar, supports for said guide links, a pair of printing keys for each type bar, means controlled thereby for actuating said type bars to eifect substantially noiseless imprints, a case shifting key, means controlled thereby for eflecting a simultaneous shifting of the supports for one of each pair of said guide links to condition the machine for upper case printing, and means for locking the shiftable supports against any movement due to actuation of the type bars by one of the keys of the pair controlling it.

18. The combination of a series of type bars, a pair of guide links supporting each type bar,

supports for said guide links, a pair of printing.

keys for each type bar, means controlled thereby for actuating said type bar to effect substantially noiseless imprints, a case shift key, means controlled thereby for effecting a simultaneous shifting of the supports for one of each pair of said guide links to condition the machine for upper case printing, and means for locking the means controlled by one of each of the pairs of printing keys to prevent movement of the means controlled by the other key of the pair by the reaction forces caused by the actuation of the type bar by the first key.

19. In a typewriting machine the combination comprising a type bar having a plurality of type thereon, a pair of supporting links pivotally connected to the type bar, a fixed pivotal support for one of said links, a movable member forming a pivotal support for the other of said links, said movable member being pivotally supported, a pair of key levers, mechanism, for interconnecting the key levers with said type bar whereby the type bar may be selectively and independently actuated by said key levers,-means for connecting a portion of said mechanism to said movable support, and means for locking said portion of the mechanism to prevent movement of said movable member during actuation of the type bar by one of said key levers.

20. In a typewriting machine the combination comprising a type bar having a plurality of type thereon, a pair of supporting links pivotally connected to the type bar, a fixed pivotal support for one of said links, a movable member forming a pivotal support for the other of said links, said movable member being pivotally supported, a pair of key levers, mechanism for interconnecting the key levers with said type bar whereby the type bar may be selectively and independently actuated by said key levers, means for connecting a portion of said mechanism to said movable member, means for locking the said portion of the mechanism to prevent movement of said movable member during actuation of the type bar by one of said key levers, a movable type guide, means for connecting the type guide with said movable member, and means for shifting the type guide for upper and lower case printing.

21. In a typewriting machine the combination comprising a type bar having a plurality of type thereon, a pair of supporting links pivotallyconnected to the type bar, a fixed pivotal support for one of said links, a movable member form-; 25

ing a pivotal support for the other of said links, said movable member being pivotally supported, a pair of key levers, mechanism for interconnecting the key levers with said type bar whereby the type bar may be selectively and independtly actuated by said key levers, means for connecting a portion of said mechanism to said movable member, means for locking the said portion of the mechanism to prevent pivotal movement of said movable member during actuation of the type bar by one of said key levers, a movable type guide, means for connecting the type guide with said movable member, andmeans for shifting the type guide for upper and lower case printing, said locking means preventing movement of said movable member as stated above for either position thereof.

22. A type block comprising a main body portion and a wing portion integral therewith and adapted for attachment to a type bar, said main body portion having three pairs of type guides on the side thereof vertically spaced in pairs, and

'type character areas formed on the front of said body portion having their center longitudinal axes lying at small angles to the longitudinal axis of said body portion.

23. A type block having a plurality of type character areas thereon, the longitudinal axes of the character areas intersecting the longitudinal axis of the type block the points of intersection being outside the character areas.

24. A type block having a plurality of type a character areas thereon, the longitudinal axes of the character areas intersecting the longitudinal axis of the type block, and pairs of end and center guides, formed on the sides of the type block.

25. A type block comprising a main body portion and a wing portion, the main body portion having a pair of type on the face thereof. the planes of said type intersecting at a point intermediate thereof, and the main body portion having three pairs of guides formed'on the sides thereof vertically spaced in pairs.

26. A type block as described comprising a P main body portion and a wing portion lying at an angle thereto, the main body portion having three pairs of guides on the sides thereof and a pair of type on the face thereof, the central vertical axes of the type lying at small vertical angles to the longitudinal central axis of the face of the main body portion.

27. A type block as described comprising a main body portion and a wing portion lying at an angle thereto, the main body portion having three pairs of guides on the sides thereof and a pair of type on the face thereof, the central vertical axes of the type lying at small vertical angles to the longitudinal central axis of the face of the main body portion, said vertical angles lying on opposite sides of the vertical axis of the type block.

28. In a type action for a noiseless typewriting machine the combination comprising a type bar having two type blocks thereon each having two types thereon, two printing levers for said bar, means for operatively connecting said printing levers to the type bar, a pivotally supported case shift member pivotally supported the type bar, and case shift means for shifting said member to position the type bar for upper and lower case printing, said types on each block lying in planes which intersect between them.

29. In a type action for a noiseless typewriting machine the combination comprising a type bar having two type blocks thereon each having two types thereon, two printing levers for said bar, means for operatively connecting said printing levers to the type bar, a pivotally supported case shift member pivotally supporting the type bar, case shift means for shifting said member to position the type bar for upper and lower case printing, said types on each block lying in planes which intersect between them, and means for locking said shiftable member against movement about its pivot during the actuation of the type bar for either upper or lower case printing when operated by one of said printing levers.

30. In a typewriting machine the combination comprising a pivotally supported type bar having a plurality of type thereon, means for shifting the pivotal support of the type bar to position it for either upper or lower case printing, and a pair of key levers connected to the type bar for independently operating it over two different paths to the printing center for upper case printing, and over two additional paths to'the printing center for lower case printing, said type bar moving in a substantially vertical plane and the longitudinal axes of the types thereon lying at small vertical angles to that plane.

31. In a type action for a noiseless typewriting machine the combination including a type bar having a plurality of types thereon, means for pivotally supporting the type bar for printing movement, pressure printing mechanism for effecting movement of the type bar, a pair of key levers, a pair of pivotally supported levers positioned to independently actuate the pressure printing mechanism, and links pivotally connecting the key levers with said levers for independently actuating them, and means on one of said levers and links for locking that lever against movement upon actuation of the other lever by the other key lever.

32. In a type action for a noiseless typewriting machine the combination including a type bar having a plurality of types thereon, a fixed pivot and means for pivotally supporting one end of the type bar thereon, a movable pivot and means for pivotally supporting the other end of the type bar thereon, pressure printing mechanism connected to the type bar for effecting printing movement thereof, a pair of pivotally supported levers for actuating said pressure printing mech anism, a link pivotally connecting one of said levers with said movable pivot, a pair of key levers, a pair of links interconnecting the key levers with said levers, and means for interlocking one of said pair of links with its associated lever for preventing movement thereof when the other lever is actuated by its key lever.

33. In a type action for a noiseless typewriting machine the combination including a type bar having a plurality of types thereon, a fixed pivot and means for pivotally supporting one end of the type bar thereon, a movable pivot and means for pivotally supporting the other end of the type bar thereon, pressure printing mechanism connected to the type bar for efiecting printing movement thereof, a pair of pivotally supported levers for actuating said pressure printing mechanism, a link pivotally connecting one of said levers with said movable pivot, a pair of key levers, a pair of links interconnecting the key levers with said levers, and means for interlocking one of said pair of links with its associated lever for preventing movement thereof when the other lever is actuated by its key lever, said locking means including a projecting lug positioned to be engaged by an ear on the associated link.

34. In a type action for a noiseless typewriting machine the combination including a type bar having a plurality of types thereon, a fixed pivot and means for pivotally supporting one end of the type bar thereon, a movable pivot and means for pivotally supporting the other end of the type barthereon, pressure printing mechanism connected to the type bar for effecting printing movement thereof, a pair of pivotally supported levers for actuating said pressure printing mechanism, a link pivotally connecting one of said levers with said movable pivot, a pair of key levers, a pair of links interconnecting the key levers with said levers, and means for interlocking one of said pair of links with its associated lever for preventing movement thereof when the other lever is actuated by its key lever, said locking means including a projecting lug positioned to be engaged by an ear on the associated link, and that link having a sliding connection with that lever whereby the ear disengages the lug when the associated key lever is actuated.

35. In a typewriting machine, the combination comprising a type action including a type bar having four type characters thereon, a pair of independently movable key levers, means for operatively connecting each of the key levers to the type bar for actuating it to move through either of two paths to a common printing point,

means operable by said key levers for determining which path the type bar is to follow, case shifting means for positioning the type bar for movement through two additional paths when operated by said key levers, and means for locking the path determining and connecting means for one of said key levers against movement when the type bar is actuated by the other key lever.

36. In a type action for a typewriting machine the combination of a type bar having a plurality of types thereon, two printing keys, means for connecting each of said keys with the type bar, a type bar supporting member, a case shiftable support on which said type bar supporting member is pivoted, and means for locking said supporting member against pivotal movement during actuation of the type bar by one of said printing keys.

37. In a typewriting machine the combination comprising a type bar, a plurality of types thereon, a plurality of guide links on which said type bar is pivotally mounted, a pair of selectively operable keys for independently operating the type bar, a member operated by one of the pair of keys for shifting the pivotal center of one of said links from normal to another position to cause printing from a different one of the types on said type bar, case shifting means for additionall shifting said pivotal center, and means to prevent movement of said pivotal center from normal when the type bar is actuated by the other of said pair of keys, said means being effective irrespective of the condition of said case shifting means.

38. In a typewriting machine and the like having a series of type actions each of said type actions comprising a supporting bracket, a case shiftable member adjustably mounted on said bracket, a type bar pivotally mounted on said member and bracket, said type bar having four types thereon, case shifting means for shifting said member, and a pair of selectively operable keys independently and operatively connected to said type bar, whereby the type bar may be moved over four distinct paths to selectively present the type thereon to a common printing point.

39. In a typewriting machine the combination comprising a type bar, an adjustably mounted shiftable member for pivotally supporting the type bar, a shiftable type guide, means interconnecting said member with said guide, apair of selectively operable printing keys independently connected to said type bar, and case shifting means controlling said shiftable member and type guide, whereby the type bar is moved over two separate paths to the type guide for one position of the type guide and over two other paths for the other position of the type guide.

40. In a typewriting machine or the like a type action including a type bar, a pair of guide links pivotally connected thereto, one of said guide links being pivotally mounted on a relatively fixed pivot, the other of said guide links being pivotally mounted upon a movable member an adjustable case shiftable support upon which said movable member is pivotally mounted, a movable type guide, means interconnecting said movable member with said guide, and a plurality of printing keys for selectively operating the type bar, whereby the type bar in its printing operation moves through difierent paths depending on the printing key actuated and the position of the case shiftable support.

41. In a typewriter, a type bar having a plurality of types thereon, a guide link pivotally attached to a fixed support and. pivotally connected to the type bar, a case shift member pivotally attached to an adjustably fixed support, a second guide link pivotallyattached to said member and connected to said type bar, a pair of key levers operatively connected to the type bar to move it to printing position over two different paths to a common printing point, and means for pivotally moving the case shift member to reposition the type bar by moving said second link to cause the type bar to pivot on the first mentioned link whereby the key levers move the type bar over two additional paths of movement to the common printing point, said printing point being determined in part by the adjusted position of said adjustably fixed support.

42. In a typewriting machine, a series of movable and shiftable type bars, a series of adjustably mounted movable members to which the type bars are respectively connected, a movable type guide, a case shift lever for holding the type uide in normal position, and means pivotally interconnecting the movable members with the type guide to effect simultaneous shifting movement of all the type bars with the type guide, said interconnecting means being slidable to allow for adjustment of said movable members with respect to said type guide.

43. In a typewriting or like machine, the combination of a series of type bars, a pair of guide links pivotally connected to each type bar for supporting and guiding it, actuating means for each type bar independent of its guide links and pivotally connected to said type bar concentrically with the pivotal connection of one of said guide links to the type bar, and means for simultaneously effecting a pivotal case shifting movement of all of said series of type bars, each type bar moving about the pivotal connection thereof with its actuating means.

44. In a typewriting machine having a series of type actions each comprising an end thrust type bar mounted on a pair of pivoted links, one link of each pair being case shiitable, and actuating means for each type bar pivotally connected thereto concentrically with the pivotal connection of said type bar with the other of its pair of links, the combination of case shifting means for simultaneously case shifting the pivotal centers of said case shiftable links for the entire series of type bars to change the path of movement of each type bar for upper case writing, said case shifting of the pivotal centers of said case shiftable links causing a pivotal movement of each of the type bars around the pivotal connection thereof with said actuating means.

45. In a typewriting machine, a set of endthrust type bars, a pair of guide links pivoted at one end to each type bar at spaced points along the length of the latter, means pivotally supporting each pair of guide links at the other end thereof, the means supporting one guide link of each pair being movable in a direction to change the angular relation of said guide link relative to the other guide link of said pair and relative to the associated type bar, actuating means connected to each type bar independently of said guide links and in such manner as to remain stationary during said change in the angular relation of the movably supported guide link relative to the other guide link of said pair and relative to the associated type bar, and case shifting means for simultaneously shifting all of said means movably supporting one guide link of each pair.

46. In a typewriting machine, a set of endthrust type bars, a pair of guide links pivoted at one end to each type bar at spaced points along the length of the latter, means pivotally supporting each pair of guide links at the other end thereof, the means supporting one guide link of each pair being movable in a direction to change the angular relation of said guide link relative to the other guide link of said pair and relative to the associated type bar, actuating means for each of said type bars, means connecting each of said actuating means with the associated ty-pe bar independently of said guide links and constructed and arranged so that the actuating means remains stationary during said change in the angular relation of the movably supported guide link relative to the other guide link of said pair and relative to the associated type bar, and case shifting means for simultaneously shifting all of said means movably supporting one guide link of each pair.

PHILIP S. RAND.

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