US2320810A - Typewriting machine - Google Patents

Description

June 1, 1943. F. M. CARROLL 2,320,810

TYPEWRITING MACHINE Filed Sept. 18, 1941 2 Sheets-Sheet 1 ATTO R N EY FIG. 1.

Filed Sept. 18, 1941 2 Sheets-Sheet 2 q NVENTOR Q BY 5 ATTO RNEY Patented June 1, 1943 QEGIUH I'KUUH TYPEWRITING MACHINE Fred M. Carroll, Binghamton, N. Y., assignor to International Business Machines Corporation, New York, N. Y., a corporation of New York Application September 18, 1941, Serial No. 411,306

23 Claims.

This invention relates to typewriting machines.

An object of the present invention is to provide an improved power operated typewriter.

Another object is to provide a power operated means for selectively rotating a type wheel.

An object is to provide a power operated mechanism for actuating a type wheel which requires only one power operator instead of a plurality, one for each character, as is more commonly the case.

An object is to provide a novel selecting mechanism for controlling the operation of a type wheel.

An object is to provide a typewriter with a plurality of type wheels and mechanism to select either of the type wheels for operation at the will of the operator.

An object is to provide a typewriting mechanism which may be operated by a single cam unit of the type disclosed in Patent No. 1,777,055.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a plan view of the machine with portions of the cabinet cut away and with the carriage removed.

Fig. 2 is a vertical section on the line 2-2 of Fig. 1.

Fig. 3 is a large scale detail view of the aligning member.

Fig. 4 is a. large scale detail view showing the aligning member and disc in engaged position.

The main frame work comprises a rectangular base In on which is mounted in parallel spaced relationship two vertical central frames II which support the printing mechanism and carriage. These frames H are rigidly joined together by cross members l4, IS, on which are pivotally mounted the members supporting the type elements; cross frames l6 and I1, supporting the type element rotating members; and the carriage rails l8 and IS on which the carriage 20 is mounted in a well known way by means of suitable anti-friction bearings. Two supplemental side frames 2| are also provided at the front end of base III, which frames 2| are joined together by bars 22a, 22b.

The carriage may be of the form used in the well known Electromatic" typewriter which has also been known as the International, but any other suitable form of carriage may be used equally as well. Upon the rear rail I9 is mounted the usual escapement mechanism generally designated 23, which may be of the form shown in U. S. Patent No. 1,994,544.

The machine is operated by a suitable electric motor M (Fig. 1) which is coupled in any suitable way to a power roller 24 driven continually by the motor M in the direction of the arrow (Fig. 2). One end of the power roller 24 is supported by the motor M while the other end of the power roller is journaled in left hand vertical frame plate ll. The right hand frame plate H is provided with a suitable opening to accommodate the frame of the motor M. This power roller provides the means for operating all of the mechanisms of the typewriter.

Printing is effected by means of two rotatable type elements like right hand element 25R, each provided with six annular rows of type characters of which there are seven types in each row. These type elements are secured to the upper ends of shafts 26R, 26L which are journaled in frame castings 21R, 21L (Fig. 1) each provided with an ear which pivotally connects the frame casting 21R or 21L to an arm 28. This arm is bifurcated to allow free pivotal movement of the frames 21R, 21L and the shafts 26R, 26L. The arm 28 is secured to a vertical shaft 29 journaled in the frame cross members ll, l5. An arm 30 is secured to the shaft 29 directly underneath the arm 28, but is approximately half the length of the latter. Pivoted to the arm 30 are two support arms 3|R, 31L which are pivotally connected by links 32 to socket bearing members 33 attached to the lower ends of shafts 26R, 26L. Construction of the bearing members 33 is such that the shafts 26R, 26L are freely rotatable therein, but are incapable of withdrawal from the bearing members whereby the raising or lowering of the arms 3|R, 3IL will result in raising or lowering the corresponding shafts 26R, 26L. This operation is performed selectively under control of the keys and will be explained hereinafter.

The arms 3|R, 3|L are twisted to form fiattened lugs 3Ia of which the lug for the shaft 26L, as shown in Fig. l, is supported in a narrow channel formed in a bracket 34L secured to the frame or base ID. The lug 3la for the arm 3|R, corresponding to the shaft 26R, is loosely received in a bifurcation formed in the horizontal arm of a bell crank 35 secured to a shaft 36 supported by the left hand frame H (Fig. l) and a bearing Ila. Thus both typewheels R, 25L are supported at all times and one of them may always be moved vertically by rocking the bell crank in either direction (Fig. 2). When the arm 30 is moved horizontally about the shaft 29 as an axis, or clockwise in Fig. l, the lug 3la on the right hand arm 3|R will be moved into the channel in a bracket 34R similar to bracket 34L, While the lug 3|a on the left hand arm 3IL will be moved into the bifurcation in the arm 35. Thus one or the other of the two typewheels 25R, 25L may be selected for a printing operation which involves selective rotation of the typewheel, selective axial movement, and a rocking movement to effect printing by the type which was selected by the first two movements.

Normally the type element 25R or 25L which is in printing position remains in a central position With respect to both rotational movement and axial movement, but is movable three extents away from the central position both rotationally and axially. These two movements are effected by similar mechanisms under control of the character keys. The operation of the two mechanisms for effecting the selection of the characters on the type elements is best understood with reference to the one which effects rotation of the typewheel. This mechanism is mainly supported by frame members IS, IT and comprises a pair of rocking frames designated 31R, 31L which are substantially identical in construction and are rotatably mounted on a stub shaft 38 journaled in the frame members l6, H. The frame members 31R, 31L are each formed with three horizontal parallel slots extending radially on the shaft 38 in which slots are pivotally mounted three levers 39. The ends of the levers 39 nearest shaft 38 are slotted to provide a pivotal sliding connection to a long pin 40a on an arm formed in a gear sector 49 which is fixed on the shaft 38. This gear sector normally meshes with one or the other of long pinions 4| secured to the shafts 26R, 26L.

The frame members 31R, 31L are provided with arms which extend to right and left, respectively (Fig. 1), underneath cross member I! and are pivotally connected to links 42 which extend horizontally to the rear of the machine and are in turn pivotally connected to arms 43 secured to a shaft 44. The shaft 44 is journaled in the frame plates l I and is provided with an arm 45 (see Fig. 2 also) connected by link 46 to a cam unit 47 which is pivotally mounted on a cross rod 48 supported by the frame I l and by a bearing bracket 49 attached to the base Hi. The cam unit 41 is constructed according to a principle Well known in the art and explained in Patent No. 1,777,055, but in the present case the side frames of the cam unit are widely separated and rotatably support a long cam 41a instead of a narrow cam as in the above patent.

Cam 41a is controlled by a release lever 50, as in the above patent, which lever is provided with a pin 50a received in a slot in the end of an arm 5| fixed on a cross shaft 52 carried by the frame plates I I. When the arm 5| is rocked in a counterclockwise direction (Fig. 2) the release lever 59 is rotated in the opposite direction to release the cam 41a which, in a well known way, is rotated slightly by spring means to engage power roller 24 and is subsequently rotated by the latter. Rotation of the cam 41a of the power roller 24 results in cam unit 47 rocking in a counterclockwise direction (Fig. 2) thereby raising link 46 and rocking shaft 44 in a counterclockwise direction against the tension of restoring spring 41b. This operation causes the links 42 to move to the left (Fig. 2) or downwardly in Fig. 1, thereby rocking the frame 31R clockwise and the frame 31L counterclockwise. Normally spring 412) holds the cam unit against a stop bar 46a.

The three levers 39 of each frame 31R, 31L are pivotally mounted at 31a intermediate their ends three different distances from the center of shaft 38 and, if any one of them is held at its left hand end (Fig. 2), the shaft 26R or 26L, whichever is operative, will be rotated either clockwise or counterclockwise (Fig. 1) three different extents in either direction depending upon which of the levers 39 is held.

The two assemblies comprisiing frames 31R, 31L and their levers 39 are identical but reversed on shaft 38 so that the lowest of the six levers 39 in Fig. 2 and the highest have the same effect except for the direction of motion imparted to sector 49. For example, the lowest lever 39 in Fig. 2, when held against movement at its rounded left hand end 39a and its pivot 31a is moved a fixed distance, acts as a lever of the third class and the right hand end will be moved a greater extent than the lever immediately above it. whereby the operative type wheel 25R or 25L will be turned a maximum extent, or three spaces, from the central position in a clockwise direction with reference to Fig. 1. The third lever from the bottom will move the least extent and the type wheel 25R will be rotated clockwise with reference to Fig. 1 only one character space away from the central position. Similarly, the topmost lever 39 (Fig. 2) will rotate the type wheel the maximum extent in a counterclockwise direction with reference to Fig. 1. Normally the gear sector 40 is held in a neutral or central position by means of a spring 55 (Fig. 2) anchored to a pin carried by the cross bar 2211 and to an arm 56 secured to the upper end of the stub shaft 38. A similar spring 51 and arm 58 secured to the shaft 36 hold the horizontal arm of hell crank 35 (Fig. 1) in a neutral or horizontal position.

For the purpose of selectively positioning the bell crank 35 to raise or lower the type wheel 25R (Fig. 2), there are provided two members 59 like members 31R, 31L rockably mounted in the same way on shaft 36 and provided with levers 60 similar to the levers 39. The levers 60 are bifurcated at their lower ends to provide a pivotal sliding connection to a long pin 35a like the pin 40a carried by the vertically extending arm of the bell crank 35. The frames 59 are connected by links 6| to arms 62 secured to the shaft 44 which, it will be recalled, is rocked counterclockwise whenever the cam unit 4'! is operative. When the levers 60 are selectively held at their rounded ends 60a, the bell crank 35 will be rocked one of three extents, either clockwise or counterclockwise (Fig. 2), according to which of the levers 60 is selected.

For the purpose of controlling the levers 39, there is provided a series of detent levers 63 (Fig. 1) which are pivotally mounted at 64a in a bracket 64 secured to the rear face of cross bar 22a, three of the levers 63 being mounted at the lower left hand corner of the bracket 64 and the UMUIUH remaining three at the upper right hand end. Each lever 63 has a notch 63a designed to receive and act as a socket for the rounded end 39a of a lever 39 when the notched end of such lever 63 is rocked rearwardly of the keyboard. The levers 63 are formed with narrow portions 63b (Fig. 1) which extend into slots formed in six rock levers 65 (Fig. 2) journaled on a rod 66 supported by the frame members 2|. The lower ends of the rock levers 65 are slotted to embrace pins carried by six upstanding arms 61, forming part of six bails designated A to F, respectively, pivoted on a rod 66 and extending underneath the key levers 69 of the keyboard. Bails A to F are restored by springs 61b.

The keys 69 are pivoted on a rod 68a (Fig. 2) supported by the bar 22b, which is also slotted to separate the key levers 69, and are restored by springs 68b. Most of the keys are formed with selector lugs 69a which are disposed difl'erent distances from the rod 69 and register with the bails A to F according to a system explained hereinafter. Whenever a key having a lug 69a registering with one of the balls A to F is depressed, the corresponding vertical arm 61 will be rocked counterclockwise (Fig. 2), thereby rocking the lever 65 to which it is connected in a clockwise direction. This will cause the free end of the corresponding lever 63 to be rocked rearwardly (Fig. 1) to seat the rounded end 39a of the corresponding lever 39 in the notch 63a. Subsequently the cam unit 41 will be caused to be operated by means to be described hereinafter and both of the frames 31R, 31L will be rocked as explained above, thereby applying an actuating force to the selected lever 39 at its pivot 31a. This, of course, will cause the operative type wheel 25R or 25L to be rotated in the proper direction to partly select the type corresponding to the key depressed.

Besides the six bails A to F, six similar bails designated G to L (Fig. 2) are pivoted on the rod 68 and have upstanding arms 61a connected by horizontal links 10 to detent levers II. The detent levers H are pivotally mounted on a rod 12 supported by the side-plates II and are shaped like bell cranks with the horizontal arm provided with a notch Ha having the same function with respect to a lever 60 as the notch 63a in the detent lever 63. When the levers H are rocked clockwise (Fig. 2), the upper end of a lever 60 will become seated in the notch Ha of the selected lever H and hold such lever 60 in the same way as the levers 63 hold the levers- For most of the character key levers, there is present both a lug 69a registering with one of the bails A to F and a lug 69b registering with one of the bails G to L, whereby both a lever 39 and a lever 60 will be selectively held in the manner described above to cause selective rotation of the type wheel 25R and rocking movement of the bell crank 35 to selectively elevate or lower the type wheel 25R. However, every character key has a lug 69b but not all character keys have lugs 69a. The reason for this is that there are seven characters in the annular rows of characters on the type wheels whereas there are only six rows of such characters on each type wheel. Normally, irrespective of vertical move ment of the type wheel 25R, there is always a character in each row in central position opposite the platen and to select the six characters in the central position, it is merely necessary to raise or lower the type wheel 25R or 25L.

Character Bails Character Bails 2 G 0 G 3 A, K A, H 4 G M- 36 G 5 B, I J 1 6 K I L &. 7 0, Cl E, H M. 3 I 'L/ H 9 E, K F, H

Character Bails Character Bails A, a F, I N. n C, H B, b C, L 0. o E, J c F, I P, p L D, d A, I Q, q F, K E, e A, J R, r B, L F, r B, K s, s K G, g B, G T, t B, H H, h C, I U, u D, L I, i D, H V, v B, J Li D, K w, w I K, k 1), o x, x A, L L, l E, I Y, y C, J

M, m D, J z, z F, L

The cam unit 41 is rendered operative by movement of th selected detent lever H, and for this purpose the horizontal arms of levers H extend to the right (Fig. 2) and overlie a universal bar in the form of a cross bar 5| a secured to an arm 5Ib fixed to shaft 52. Whenver one of the levers II is rocked clockwise to select a. lever 66, the horizontal arm of the lever H will engage the cross bar Sid and rock the arm 5| counterclockwise to release the cam unit for operation as explained above. This is another reason for providing each of the key levers 69 with a lug 691:.

Since depression of two character keys simultaneously would result in jamming of the machine due to simultaneously selecting two of the levers 39 or two of the levers 60, key locking means is provided to prevent operation of two keys. This means is well known in the art and consists, in the case of the levers 1|, of a bar 13 (Fig. 2) which is slotted transversely to guide the horizontal arms of levers H and is also bored longitudinally to receive locking balls 14 which are of such size and arrangement that only one of the levers 1| may be actuated at a time. Lockout mechanisms of this type are quite commonly provided in key controlled printing machines and many forms exist which could be used in place of the one shown in the drawings. A similar lock-out mechanism is provided for the levers 63 and consists of short blocks 64b (Figs. 1 and 2) secured to the brackets 64 and slotted and bored like bar 13 to accommodate lock-out balls Ma. The levers 63 are formed with curved lugs 630 which extend into the slots in the blocks 64b and cooperate with the balls 74a. Thus, only one of the levers 39 and only one of the levers 60 may be operated at a time.

The third movement of the type wheel consists in rocking the frame member 21R or 21L in a clockwise direction (Fig. 2) to cause the selected type character to efiect an impression on a work sheet 15 wrapped around platen 16 HUUHI through the usual inking ribbon (not shown). For this purpose, there is provided a cross rod 11 which is carried by the links 42 and extends behind one arm of a bell crank 18 pivoted at the middle of rod 12. A spring I9 urges the bell crank 18 in a clockwise direction (Fig. 2) and normally holds the vertical arm of said bell crank in contact with the rod 11. When the links 42 are moved forwardly, that is, are pushed to the left (Fig. 2) by the cam unit 41, the bell crank 18 is rocked counterclockwise and the horizontal arm thereof, by engagement with a lug 21a formed in the frame 21R or 21L, as the case may be, rocks such frame clockwise to efiect the impression by the selected type wheel, 25R or 25L.

Means are also provided to hold the type wheel rigid against both axial and rotational movements while characters are being printed. This means consists of an arm 88 (Fig. 2) pivoted on rod 12 adjacent the bell crank 18 and connected right, thereby rotating the shaft 29 clockwise by a link 8| to one arm of a bell crank 82 secured to a shaft 83 journaled in the frame plates H. A torsion spring 84 on the rod 83 normally urges the bell crank 82 in a counterclockwise direction (Fig. 2) against a stop rod 85 carried by the plates Pivoted at 82a on the upper end of the vertical arm of bell crank 82 is an aligning member in the form of an arm 86 which is urged in a clockwise direction by a spring 81 which is hooked around a pin carried by the bell crank 82 and also around the arm 86, the spring being coiled around the pivot 82a for arm 86. A portion of th member 86 abuts a lug 82?) formed in the bell crank 82 to limit clockwise rotation of the member 86 under the influence of spring 81. When the frame 21R or 21L, as the case may be, is operated by the bell crank 18 to print a character as described above, the lug 21a engages the arm 88 and rocks it counterclockwise, thereby depressing link 8| to rock bell crank 82 and the aligning member 86 clockwise as a unit.

Adjacent the bearing 33, each shaft 26R, 26L has a toothed aligning disk 88 formed with seven teeth 88a which are triangular in shape transversely of the disk 88 with the interdental spaces 88b V-shaped in side view. The aligning member 86 has six cut-away portions, as at 86a (Fig. 3), to form wedge shaped teeth capable of entering the V-shaped interdental spaces 88b (Fig. 4) in the aligning disk 88 to prevent rotational movement thereof. The shape of the cut-away portions 86a is such that the converging side walls of the spaces 86a engage the sides of the teeth in the disk 88 to prevent vertical movement of the operative shaft 26R or 26L. The cut-away portions 86a are spaced to correspond with the spacing of the rows of type characters on the type wheels, while the interdental spaces 88b on the disk 88 correspond in position to the type characters on the type wheels R or 25L. The positions of the tooth spaces on the disk 88 and the cut-away portions 8611 on arm 88 are such that the type faces always strike squarely at the printing point.

For the purpose of selecting the type wheels 25R, 25L, there are provided two shift keys SK (Figs. 1 and 2) which form part of a bail 89 pivoted on the rod 88 and having a downward extension 98 (Fig. 2) connected by a link 9| to an arm 92 secured to the vertical shaft 29 which, it will be remembered, carries the arms 28 and 38. When a shift key SK is depressed, the bail 89 and arm 98 are rocked counterclockwise (Fig. 2), thrusting the link 9| to the rear or to the (Fig. 1). This causes both the arms 28 and 88 to move in the same direction, thereby swinging the type wheel 25L into operative position. The lug 3|a on the arm 3|R is thereby carried out of cooperation with the end of the horizontal arm in bell crank 35 and into the channel shaped space in the bracket 34R. At the same time the lug 3|a for the arm 3|L i moved into the bifurcation in the bell crank 35.

Means is provided for preventing the type wheels 25R, 25L from being displaced with respect to the selecting mechanism. This means comprises a. rack plate 94 (Fig. 1) which is attached to the cross member |6 above sector 48 by means of suitable screws 95 and spacing collars interposed between the cross member l8 and plate to prevent plate 94 from binding the sector 48. The rear edge of plate 94 is provided with teeth like the teeth on the pinions 4| on shafts 28R, 28L except for omission of teeth and formation of a small space directly in the center of the plate which permits free rotation of the pinion for the shaft 26R. or 26L which is in the operative position.

As shown most clearly in Fig. 1, the teeth on the sector 48 and the teeth on the plate 94 are so arranged that the pinions are always in mesh with one or the other of these members. When the arms 28, 38 and shaft 29 are rotated in a clockwise direction with reference to Fig. 1, the shafts 26R, 28L are caused to rotate in consequence of the pinions rolling over the plate 94 and the sector 48. In other words, whenever the type wheel 25L is selected by a case shift operation involving the depression of a shift key SK, the lower case type wheel 25R will be rotated away from its normal position as well as shifted bodily to the right in Fig. 1 and upon .a release of the shift key will be reversely rotated and shifted the same extent back to its normal position.

Provision is made of means for locking the gear sector 40 against movement while the key SK is shifting the type wheel 25L into position and vice versa. This means includes an aligning member 96 (Fig. 2) secured to the underside of the gear sector 40. The member 98 consists of an arm which is bent downwardly and horizontally toward the keyboard and its front or left hand edge (Fig. 2) is provided with a notch opposite the upper end of a detent lever 91 pivoted on a bracket 91a carried by the cross member I5. The lower end of the detent lever 91 is provided with a cam projection 91b coacting with a pin 98a carried by an arm 98b, forming part of the bail including the shift keys SK. The cam projection 91b is so designed that the initial movement of the shift key causes the detent lever 91 to rock clockwise (Fig. 2) whereby its upper end enters the notch in the detent member 96 before any appreciable movement of the type wheels into and out of operative position takes place with the result that the plate 94 and the gear sector 40 constitute the equivalent of a single fixed rack over which the pinions 4| may roll into and out of operative position.

Means is provided to effect spacing of the carriage 28 automatically each time a character is printed. Loose on shaft 44 is an arm 98 which is located alongside of a second arm 99 which is fixed to the shaft 44. The arm 99 has a bentover lug 99a in the plane of the arm 98 whereby arm 98 will be rocked counterclockwise with each operation of the shaft 44 by the cam unit 41.

The arm 98 is connected by a link I to an arm IOIa secured to a shaft I02 Journaled in plates II, and a second arm IN!) on shaft I02-is connected by a link I03 to the escapement operating arm I04. As a result of this linkage, the arm I04 is rocked counterclockwise whenever a printing operation takes place and actuates the escapement 23 in a well known way, causing the carriage to space under the motive power provided by the usual spring motor (not shown). For the purpose of spacing the carriage without printing, as between words, there is provided a space bar SB which is part of a double bail I05 pivoted on the rod 68a and having a crossbar I05a connected by a link I06 to a rock lever I01. The latter is journaled on a cross rod I08 and is connected by a link I09 to a cam unit control lever I I0 similar in shape to the control lever 5|.

The control lever IIO icontrols a cam unit III (Fig. 1) like the ones disclosed in Patent No. 1,777,055. Cam unit III is pivoted on cross rod 00 to the left of the cam-unit 41 (Fig. 1) and is connected by a link I I! to one arm of a bell crank M3 loosely mounted on the shaft 40 adjacent the arm 98. .The bell crank H3 is provided with a ing iI3a extending into the plane of the arm 98, whereby the latter may be rocked counterclockwise by similar rotation of either, the arm 99, through lug 99a, or an arm of the bell crank till, through the lug II3a. When the space bar SE is depressed, cross bar I05 is moved counterclockwise, thrusting the link I06 to the right (Fig. 2), thereby rocking the lever I01 counterclockwise to draw downwardly the link I09. This rocks control lever iI0 in a counterclockwise direction and releases the cam unit I II for operation by the power roller in the same way as the arm 5! renders the cam unit 41 operative. As a result, the link II2 will be thrust upwardly, rocking the bell crank lever 11 I3 counterclockwise and, through the lug H311, rocking the arm 98 in the same direction to eifect an operation of the escapement mechanism 03. also has a spring like 50 which holds the cam unit in the same position as cam unit 41 in Fig. 2, with bar 060: acting as a limit stop.

. Vil'hile there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single embodiment it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be, made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. A typewriting machine comprising a plurality of type wheels, each type wheel having a plurality of annular rows of type; means to mount both of said type wheels for selective axial movement and selective rotary movement to select a character to be printed, means to selectively rotate said type wheels and to move them axially, and means to move a selected one of said type wheels into cooperation with the selective rotation and moving means.

2. In a typewriting machine, a type wheel having at least one row of characters thereon, a series of keys corresponding to said characters; means to selectively rotate the type wheel under control of the keys including a rock member having an invariable excursion, a sector for rotating the type wheel, and actuating levers on said rock Cam unit i I I tor, said levers being fulcrumed at diiferent points intermediate their ends whereby when the free end of any lever is held, its other end will actuate the sector a predetermined extent for each movement of the rock member; power means for actuating the rock member, means controlled by the keys for selectively holding the end of the actuating levers, and means controlled by the keys for causing an operation of the power means.

3. In a typewriting machine, a type wheel having at least one row of characters, a member for rotating said type wheel, a rock frame; a series of actuating levers pivotally mounted on said rock frame and having one end of each pivotally connected to said member, said levers being pivoted on said frame difierent distances from the point of connection to said member whereby when the other ends of said levers are held and the frame rocked, .said member will be rotated different distances; 9, series of keys, means controlled by said keys and engageable with the free ends of said levers for selectively holding the free ends of said levers againstmovement whereby to effect selective rotation of the type wheel, and means to rock said frame.

4. In a typewriting machine, a type wheel having at least one row of characters, a sector for rotating said type wheel, a rock frame, a series of actuating levers pivotally mounted on said rock frame and having one end of each pivotally connected to said sector, said levers being pivoted on said frame different distances from the oint of connection to said sector whereby when the other ends of said levers are held and the frame rocked, said sector will be rotated different distances, a

series of keys, means controlled by said keys and engageable with the free ends of said levers for selectively holding the free ends of said levers against movement to effect selective rotation of the type wheel, and power mean controlled by said keys for actuating said rock frame.

5. In a typewriting machine, a type wheel having at least One row of characters, a sector for rotating said type wheel, a rock frame, a series of actuating levers pivotally mounted on said rock frame and having one end of each pivotally connected to said sector, said levers being pivoted on said frame different distances from the point of connection to said sector whereby, when the other ends of said levers are held and the frame rocked, said sector will be rotated different distances, a series of keys, means controlled by said keys and engageable with the free ends of said levers for selectively holding the free ends of said levers against movement to effect selective rotation of the type wheel; and means to rock said frame, including a. continually rotating power roller and a cam unit having means releasable for engaging said cam unit with said power roller and connected to said frame and released for engagement with the power roller by operation 'of any one of said keys.

6. In a typewriting machine, a type wheel having a plurality of annular rows of characters.

means to mount said type wheel for axial movement to select a row of characters thereon, means for moving said type wheel axially including a rockable member coupled to the type wheel, a

rock frame, series of actuating levers pivotallymounted on said frame and having one end of each pivotally connected to the rockable member and the other ends free, said actuating levers being pivoted intermediate their ends different distances from their free ends whereby'when any member, each having one end engaging said secone of them is held at its free end and the frame rocked, the rockable member will be actuated an extent commensurate with the distance the selected lever is pivoted from its free end, a series of detent levers, each associated with one of said actuating levers and selectivel engageable with the free end of said one lever, a series of keys operatively connected to said detent levers, and means controlled by said keys for rocking said frame.

'7. In a typewriting machine, a plurality of type wheels, each having a plurality of annular rows of type characters, each of said type wheels being mounted for axial movement to select a row of characters, means to selectively move said type wheels axially including a rockable member, a rock frame having an invariable excursion, a series of actuating levers pivoted on said rock frame and having one end of each lever pivotally connected to the rockable member and their other ends free, said actuating levers being pivoted on said frame different distances from the point of pivotal connection to the rockable member, detents engageable with the free ends of said levers, said levers when held by said detent levers causing the rockable member to be rocked different distances according to the distance of the pivot of the selected lever from the point of its connection 'to the rockable member, keys for controlling the detent levers, and means to couple one or the other of said type wheels to said rockable member.

8. In a typewriting machine, a type wheel having a plurality of annular rows of type; means to rotatably and slidably mount said type wheel and means for selectively rotating and selectively displacing said type wheel along its axis including rock frames having invariable excursions, rockable elements, each associated with one of said frames and having connections to the type wheel for respectively rotating such type wheel and shifting it axially, actuating levers pivoted on said frames, said levers having their ends pivotally connected to said rockable members in groups and their other ends free, said actuating levers being pivoted intermediate their ends to said frame difierent distances from their points of the extent resulting from holding another lever, and detent levers, each for holding the free end of one of the actuating levers; a series of keys for controlling said detent levers, and means controlled by said keys for operating said detent levers in combinations to effect a simultaneous rotation and axial displacement of the type wheel to select a character.

10. In a machine of the class described, the combination of a printing member having a plurality of type thereon, means to movably mount said printing member to select any of said type, a series of keys'corresponding to said type, a member having an invariable movement; a series of actuating levers pivoted at difierent points intermediate their ends to said invariably movable member, one end of each lever having connection to the printing member, said levers, when held at their free ends and the invariably movable member is operated, causing the printing member to move a different distance for each lever so held; means controlled by the keys for holding the free ends of said levers, and means controlled by said keys for causing an operation of the invariably movable member.

11. In a machine of the class described, the

' combination of a printing member having a pluconnection to the rockable members whereby,

when the free end of any lever is held against movement and the associated rock frame moved an invariable extent, the type wheel will be rotated or shifted axially an extent different from the extent resulting from holding another lever, and detent levers, each for holding the free end of one of said actuating levers; a series of keys.

for controlling said detent levers and means controlled by the keys for rocking said frames.

9. In a typewriting machine, a type wheel having a plurality of annular rows of type; means to rotatably and slidably mount said type wheel and means for" selectively rotating and selectively displacing said type wheel along its axis including rock' frames having invariable excursions, rockable elements, each associated with one of said frames and having connections to the type wheel for respectively rotating such type wheel rality of characters; means for selectively moving said member to select a character comprising a member having a to-and-fro movement and a series of operating members connected to and movable by the last named member and having at one end a connection to the printing member; a series of detents for the operating members, each detent when operated engaging one of the operating members, said operating members, when held by their detents and moved by the first member, each imparting a different extent of movement to the type wheel to select a character; selectively operable means for actuating the detents, and means controlled by the selectively operable means for causing an operation of the first named member.

12. In a machine of the class described, a printing member having a series of type, means for mounting said member for movement to select a type, an oscillatable member, a series of actuating levers pivotally connected to said oscillatable member; means connecting the ends of said levers to the printing member, the pivotal connections of said levers being arranged so that whenthe free end of any one of them is held and the oscillatable member is oscillated, the printing member will be moved a different extent for each lever; means cooperating with the free ends of said levers for selectively holding the free ends of said levers against movement, and selectively operable means for actuating the holding means.

13. In a machine of the class described, the combination of a printing memebr having a plurality of type, means to movably mount the printing member to enable one of said type to be selected, a series of actuating levers having one end thereof connected to the printing member; a series of detents for the other ends of said levers, said detents being selectively operable to hold the ends of said levers one at a time; and a common operating member for said levers having connections thereto at different points in- V termediate the ends of said levers whereby the tated or shifted axially an extent different from printing member will be moved diiferent extents according to which of said levers is held when the levers are moved by the common operating member.

14. In a machine of the class described, the

combination of a series of actuating levers, an

invariably movable element, a variably movable element, said elements being pivotally connected by said levers with diflerent leverage ratios whereby variable movement is imparted through said levers to the variably movable element by the invariably movable element; detent means cooperating with each of said levers and when operated causing the associated actuating lever to have a pivotal movement under the influence of the invariably movable element to produce a variable movement of the variably movable element according to the lever detained, and power means for actuating the invariably movable element.

15. In a machine of the class described, the combination of a type wheel, a variably movable operable element and eflect a displacement oi the printing member, said levers having their pivotal relations and relationships to the detents. and the variably and invariably movable members so arranged that each lever effects a different extent of movement of the printing member.

19. In a machine of the class described, the combination of a continually rotating power roller, a cam unit engageable with the power roller and operable thereby, an invariably movable member connected to said cam unit, a printing member movable to difierentpositions to select one of a plurality of type thereon, a variably movable member connected to the printing member, a series of actuating levers, each having pivotal'connections to both the variably and invariably movable members with variable lever ratios; and a element for rotating said type wheel, an invariably movable element; a series of operating levers, each connected to the variably movable element and to the invariably movable element with variable lever ratios, respectively; a series of detents, each operatively engageable with one of said levers and when engaged with its associated lever and the invariably movable element is operated resulting in the type wheel moving an extent different from the movement effected by other detents; operating means for the invariably movable element, and selectively operable means for actuating the detents.

16. In a machine of the class described, the combination of a printing member having a plurality of rows of type, means to mount said printing member for two different movements at right angles to each other, a series of keys corresponding to said types; and means for selectively moving said printing member in both of said directions under control of said keys, said moving means including a variably movable element having a connection to the printing member, an invariably movable element,'a plurality of actuating levers pivotally connecting said elements with difierent ratios, and a series of detents, each operatively engageable with one of said levers, each of said levers, when engaged by its detent, causing the variably movable element to be moved by the invariably movable element an extent to select a particular type.

17. In a machine of the class described, the combination of a series of actuating levers; a series of detents, each cooperating with one of said levers and when operated forming a fixed fullcrum for said lever; an invariably operable memher connected to said levers with variable driving ratios and, when operated imparting diflerent extents of motion to said levers; a variably operable member connected to said levers, and a printing member connected to the variably operable memher and moved different extents to select type thereon by the movement of said variably operable member.

18. In a machine of the class described, the combination of a printing member having a plurality of type characters, an invariably movable element, a variably movable element having a connection to the printing member to effect movement thereof to select a type character, a series of detents; and a series of actuating levers, each lever corresponding to a detent and when the detent is operated having a pivotal relation thereto, said levers also having pivotal relationships with both of said elements whereby when any detent is operated to engage its associated lever and the invariably operated element is moved, the selected leverwill impart motion to the variably series of detents, one for each lever and arranged when operated to act as a third pivot point for said levers, said invariably movable member, when operated by said cam unit, moving all of said levers idly unless one of said detents is operated and, when any detent is operated, in consequence of said variable lever ratios, causing the variably movable lever associated therewith to move the variably movable member an extent different for each lever.

20. In a machine of the class described, the combination of a printing member having a plurality of rows of type and movable in one direction to select a row of type and in another direction to select a particular type in a row, a series of keys corresponding to the type on the printing member; separate means for effecting each of the two movements of the printing member, each means comprising an invariably movable member, a variably movable member, a series of levers, each having a variable ratio pivotal connection to the variably movable member and the invariably movable member respectively, and a series of detents corresponding to said levers and when operated engaging said levers to form pivots therefor; power means to operate the invariably movable members; means controlled by the keys for operating a detent for each of said separate means, said keys causing one or more of the detents to be operated to effect the one or both movements of the type wheel to select a type corresponding to the key operated; and means controlled by said keys for causing an operation of the power means;

21. In a machine of the class described, the combination of a type wheel having a plurality of annular rows of type, means for mounting said type wheel for both rotational and axial movement to select a type; a series of keys, each corresponding to a type; two series of actuating levers, one for efiecting rotary movement and the other for effecting axial movement of the type wheel, respectively; invariably movable means pivotally connected to said levers for imparting a rocking motion thereto; two series of detent levers, each detent lever being associated with an actuating lever and engageable therewith to act as a pivot therefor; variably movable members, one for each of the two selectin movements of the type wheel, and having connections thereto for moving the type wheel axially and, rotatably, each of said variably movable members being associated with a group of said actuatin levers, said levers having diilerent operating ratios to effect diflerent extents of movement of the variably movable members and type wheel; and means whereby the keys operate the detent levers singly or in combinations to cause at least one of said movements to select a type to take place with each depression of a key.

22. In a machine of the class described, the combination of a type wheel having a plurality of annular rows of type, means for mounting said type wheel for both rotational and axial movement to select a type; a series of keys, each corresponding to a type: two series of actuating levers, one for eiiecting rotary movement and the other for effecting axial movement of the type wheel; invariably movable means pivotally connected to said levers for imparting a rocking motion thereto; two series of detent levers, each detent lever being associated with an actuating lever and engageable therewith to act as a pivot therefor; variably movable members, one !or each of the two selecting movements of the type wheel and having connections thereto for moving the type wheel axially and rotatably, each of said variably movable members being associated with a group of said actuating levers. said levers having different operating ratios to effect different extents of movement of the variably movable members and type wheel; means whereby the keys operate the detent levers singly or in combinations to cause at least one of said movements to select a type to take place with each depression oi a key; power means for operating the invariably movable means, and means controlled by said keys for causing an operation of the power means each time a key is depressed.

23. In a machine of the class described, the combination of a type wheel having a plurality of characters thereon, a series or keys corresponding to the characters on the type wheel, a main operating member, an element connected to the type wheel to eil'ect movement thereof, to, select a character; a series of actuating levers having diilerent ratios, each lever being connected to the main operating member and to said element; and a series oi detents, each cooperating with an ac-- tuating lever and selectively operable by the keys to render said levers eiiective.

FRED M. CARROLL.

Images