US1402200A - Typewriter - Google Patents

Description

E. WINTERER.

TYPEWRITEB. APPLICATION FILED DEC. I3, 1920.

1,402,200. Patented Jan. 3, 1922., I

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E. WINTERER.

TYPEWRITER.

APPLICATION FILED DEC. I3, 1920L 1,402,20Q, Patented Jan. 3, 1922,

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jjj Vel? f of. E W72 27924624 EDWARD WINTERER, OF LOS ANGELES, CALIFORNIA.

TYPEWRITER.

Specification of Letters Patent.

Patented aan. 3,1922.

Application led December 13, 1920. Serial No. 430,339.

typewriting machines has reference more particularly to an improvement in ribbonless typewriters.

The primary object of the invention 1s to produce a comparatively simple construe? tion in ribbonless typewriters and particularly a construction in which a co-operative relationshipof parts are so arranged as to provide a most efficient operationv in machines of this character.

)Vith these further objects in view` the invention will be more clearly understood with reference to the accompanied drawings in vwhich Figure 1 is a longitudinal section on the line l-1 Figure 4:;

Figure 2 is a detailed view of a type arm 'showing its printing relation relative to the platen;

Figure 3 is a detailed View of an ink pad;

Figure 4 is a front elevation;

Figure 5 is a perspective view of a major and minor bar;

Figure 6 is a perspective view of a guide plate for each of the major bars;

Figure 7 is a perspective view of a portion of a slotted transverse bar which supports the operating levers for the major bars;

Figure 8 is a detail View of the sliding block to which the minor bar is pivoted; I

Figure 9 is a perspective view of a portion of the guide bar for the sliding block bars;

Figure 10 is a perspective view of a bell crank to operate sliding block for the minor bar' Figure 11 is a detail plan view of the guide block and shift bar;

Figure 12 is a cross section on the line 12-12 of Figure 11;

Figure 13 is a perspective view of an ink pad and its holder; l

Figure 14 is a detail view of the quadrant carrying the inl; pads;

Figure 15 is a detail view of the shifting bale for operating the shift quadrant;

Figure 16 is a detail view showing the supporting means for carrying the shift quadrant;

Figure 17 is a detail view showing means for connecting the sliding bars to the shifting bar.

Referring now to the drawings in detail the type frame (1) may be produced from stamped sheet metal including a base (2) elongated transversely of the frame.

An important feature of the invention resides in the combination of a plurality of type bars, each of which consisting of a major type bar (3) and a. minor type bar (4 1). The major bar is produced in two pieces riveted together as at (5) at one end and with 4the pieces spaced apart to permit the minor bar, consisting of one piece, to move freely between the same. The major bar is of greater length than the minor bar and rotates upon a stationary pivot (6).

rlhe minor bar also rotates on a pivot which is fixed during the time of rot-ation, but which is shifted to certain points for the printing of capital letters. As the two bars operate on different centers and are of unequal length. their upper ends describe different arcs ofa circle. To the upper end of the major bar is pivoted a type arm (8) which has an extension or handle (9), the latter being pivoted and attached. to the minor bar. The major bar carries the rotating type hammer (10) into position for impressing the type on the face thereof on the paper to be printed or typewritten.

Each of the type hammers which will preferably be 26, carry on their faces two letters; one being the capital and the other preferably 16 type hammers carry numerals and other characters, making a tot-al of 84, single and individual characters, or 4t2 hammers and combination type bars. will be seen from Figure 4 the type bars are set and spaced around a part of a semi-circle whose diameter is the length of the major bar plus the distance of the center of the type of a pivot which will permit each and every type hammer to deliver its impression on the platen A on exactly the same point.

Foi each one of the type hammers (10) is provided an ink pad (11) which is a boxlike structure, the open face of which being somewhat tl-shaped to correspond to the face of its 'respective type hammer. The front and back of the ink pad case is slotted with the Slots adapted to receive the frame of 11o the ink pad holder (12) which is pivoted as at (13) on the quadrant (13a). The end l member of the holder frame terminates in an elongated curved lever (14) which is presented in the path of the major bar (3) so that the major bar in returning to an active or normal position will press upon the lever and move the ink pad against the face of the type hammer and against the infinence of the spring (15).

Arranged on the minor bar (4) is a spur (16) which is adapted to engage the higher one of the notches (17) in the guide plate (18) when the type on the lower face of the type hammer' co-acts with the platen A to print the character thereon, lhowever, in printing thev character on the top of the hammer face the spur (16) will engage the lower oneof the notches (17) all of which guide plates are xed to the frame by slotted clamps (18a). The spur (16) really cooperates with the notches on the guide plate for steadying type bars when in active position.

As previously stated each one of the major bars is pivoted as at (6) to its respective guide plate (18) with the two pieces of the bar continued at an angle as at (19) and joined together by a pin (19a). Received etween the two pleces of the major bar and engaging the pin (19a), is the slotted end of the operating lever (20). The elbow (20a) of this lever carries a pin (21) which is received in the halve bearing in the top of the supporting bar (22). This bar is provided with a plurality of parallel slots (see Figure 7) the elbows (20a) of the levers (20) being received in these slots. The horizontal extension (23) of the operating lever is pivoted to a link (24) which in turn straddles and is pivoted as at (25) to the key lever (26), the end of which being pivoted'as at (27) with a spring (28) operating to return the same to a normal position after the key thereof not shown in the drawing has been pressed down. By pressing down on the key, the'key lever (26) imparts a downward pull on the extension (23) of the operating lever (20) which will tend to rock it in its slotted bearin and push the slotted end which engages the pin (19) forward which in turn will rotate the major bar (3) about its pivot (6) upward toward the platen A and bring the character on the type hammer (10) in printing contact with the platen. As mentioned, each of the type bars, consisting of the major and minor bar, will be actuated independent of each other. In other words, there will be an o erating lever such as (20) for each vone of tlhe same and the manipulation of these operating levers will include an independent key lever such as (26). The moment the weight of the major bar is relieved from the -lever (14) of the ink pad, the spring (15) of the ink pad will pull the same. downward.

The distance between the pivot (7) of the minor bar (4) and the platen A together with the action of the toggle, represented by the extension (9) of the type arm will operate to print either the character on the top surface of the type hammer (10) or the -character on the bottom surface thereof.

This distance is regulated by means of the block 7 b, in which one end of the minor type bar pivots as at 7. It will be seen from Figure 1, that in this block also pivots the end of one arm of a bell crank lever (33), as at 7". The elbow of said bell crank lever pivots, as at 35, in the forked end of a bolt 35a secured in the transverse bar 29a. The end of the other arm of the bell crank is pivotally connected, by the pin 34, to a bolt 34a secured to the semi-circular shifting bar 29. The latter is secured to two longitudinal sliding bars 31, which are adapted to move longitudinally on two rollers 32. The bars are actuated by the bail or yoke 37 which extends across the typewriter rearwardly of the keys and the downwardly extending arms of which are pivotally supported lin the frame. From the horizontal member of this yoke (as shown in Figure 15) extend upwardly two links 40, the .upper ends of which are pivotally fastened to the sliding bars 31. The two arms of the yoke are also provided with two forwardly extending lever arms 30 having keys 45 secured thereto, by means of which the yoke may be rocked on its pivots.

Referring to Figure 1 particularly,it will be seen that a pressure on one of the two keys 45 will cause the yoke to rock forwardly, actuating, through the links 40, the sliding bars 31 and through them the shifting bar 29, as indicated in,|dotted lines in Figure 1. The shifting bar carries along on its forward motion the pin 34 constituting the pivot for the lower arm of the bell crank lever 33, This again causes the lever to pivot on 35 and to bring down the block 7b, and with it the pivot 7 for the minor type bar 4, thereby causing the upper, or capital letter to imprint itself upon the platen A. W'hen the pressure is released from the key 45, two springs 36 between the arms of the bail 37 and the supporting bar 22 rock the bail back to its normal positionY and -return all the partsy to the positions shown in full lines in Fi re 1.

he housing for the block (7b) is best illustrated in Figure 9 which lincludes a doubled forked frame (38), the tines thereof being curved to correspond to the slight curvature of the block (7b) so as to realize the desired arcuate movement of thel pivot (7). The block (7 b) is confined between the tines of the frame (38) with the slotted end -of the bell cranks 'passing between the tines and 4pivots including a movable pivot for the minor bar, means for actuating the major bar and through it the minor bar and type arm, to bring the character on the face ofV the type hammer inprinting relation with a platen, and a shifting bar having a separate connection with each one of the minor bar pivots, each of said separate connections comprising a bell crank having a fixed pivot and a pivot on the shifting bar with its opposite end engaging a block carrying the pivotof the minor body.

2. In a typewriter, a plurality of type bars each of which comprising a major and a minor bar, a type arm connecting the ends of the major and minor bars and including a type hammer, the opposite ends of the ma]or and minor bars having separate pivots including a movable pivot for the minor bar, means for actuating the major bar and through it'the minor bar and type arm, to bring the characters on the face of the type hammer in printing relation with a platen, and a shifting bar having a separate connection with each one of the minor bar pivots. each of said separate connections comprising abell crank having a xed pivot and a pivot on the shifting bar with its opposite end engaging a block carryin the pivot of the minor bar, and a guide or said block.

3. In a ribbonless typewriter, a type frame, a key board having key levers, type bars, actuating connections between the key levers and the type bars, a type arm pivotally secured to one end of each type `bar including a type hammer having rinting characters on the face thereof, a pivoted ink pad 'for each type hammer, means for contacting said type hammer with said ink pad to hold the pad against the type, and sprlng means'associated with each pad for moving the same away from the type hammer when released by said contacting means.

4. In a ribbonless typewriter, a type frame, a key board having key levers, type bars, actuating connections between the key levers and the type bars, a type arm pivotally se` cured to one end of each type bar including a type hammer havin rintin characters o n the face thereof in dilerent p anes, a pivoted ink pad for each type hammer having a face adapted to registerwith the face of the hammer, means for contacting' said type hammer with said ink pad to hold the pad" against the type, and spring means associated with each pad for moving the same away from the type hammer when released by said contacting means.

5. In a ribbonless typewriter, a type. frame` a key board having key levers, type bars, actuating connections between the key levers and the type bars, a type arm pivotally secured to one end of each type bar including a type hammer having printing characters on the face thereof, a pivoted ink pad for each type hammer having a lever thereon, each bar, when actuated by its keyv lever, adapted to operatively engage said ink pad lever and to thereby force the hammer and the ink pad into opera-tive contact with each other, and spring means associated with each pad for moving the pad away from the type hammer upon the -release of said type bar".

6. Inaribbonless typewriter,atype frame, a key board having key levers, type bars, actuating connections between the key levers and the type bars, each of said type bars comprising major and minor bars, a type arm connecting each pair of major and minor bars at one end, each type arm including a type hammer having printing characters on the face thereof in different planes, the opposite ends of the major and minor bars having separate pivots including a fixed pivot for t e major bar and a movable pivot for the minor bar, a ASpring-actuated, pivoted ink pad for each hammer having a lever thereon, said lever being adapted to be actuated by said major bar and to thereby force the pad into a uniformly growing operative contact with the hammer regardless `of the position of theymovable pivot of the minor bar.

7 In a ribbonless typewriter, a type frame, a key board having key levers, type bars, actuating connections between the key levers and the type bars, each of said'type bars comprising major and minor bars, a typearm 'connecting each pair of major and minor bars atene end, each type arm including a type hammer having printing characters on the face thereof in different planes, the o posite ends of the major and minor bars aving separate pivots 1ncluding a fixed pivot for the major bar and a movable pivot for the minor bar, la spring-actuated, pivoted ink pady for each hammer having a lever thereon, said lever being adapted to be actuated -by said major bar and to thereby force the pad into a uniformly growin operative contact with the hammer regar less of the position of the movable 'pivot of the minor bar, said spring being ad-a ted to move said pad away from the type ammer when the lever becomes disengaged from the major bar. v

8. In a ribbonless typewriter, a slotted major bar having a pivotal support underneath the platen of the typewriter and normally occupying a horizontal position, a type arm pivotally supported in the free end of the major bar having a hammer at its free end and an extension beyond its pivoted end, a minor bar pivotally supported between the major bar support and the type hammer operating within the slot of the major bar and engaging the end of the type arm extension, means for swinging the major bar into a vertical position whereby the minor bar is caused to swing the type`hamn'1er into vertical Contact with the front of the platen, a guide for the major bar keeping the same vertically alined, a spur on the minor bar and a notch in the guide adapted to receive the spur and to thereby insure a proper alinement of the letters on the platen.

9. In a ribbonless typewriter, a slotted major barhaving a pivotal support underneath the platen ot' the typewriter and normally occupying a horizontal position, a type arm pivotally supported in the free end of the major bar having a hammer at its free engl andan extension beyond its pivoted end, a minor bar pivotally supported between the major bar support and the type hammer operating within the slot of the major bar and engaging the end of the type arm extension, means for swinging the major bar into a Vertical position whereby the minor bar is caused to swing the type hammer into vertical contact with thefront ofthe platen, and an ink pad pivotally secured in operative proximity to the t-ype hammer having a handle thereon adapted' to be struck by the major bar on its return to a. horizontal position whereby the ink pad is brought into Contact with the type hammer.

10. In a ribbonless typewriter, a slotted major bar having a pivotal support underneath the platen of the typewriter and normally occupying a horizontal position, a type arm pivotally supported in the free end of the major bar having a double faced hammer at its free end and an extension beyond its pivoted end, a minor bar pivotally supported between the major bar support and the type hammer operating within the slot of the major bar and engaging the end of the type arm extension, means for shifting the minor bar support and means for swinging the major bar into a vertical position, whereby the minor bar is caused to swing the type hammer so as to selectively bring either face of the same into vertical contact with the front of the platen.

ll. In a ribbonless typewriter, a slotted major bar having a pivotal support underneath the platen of the typewriter and normally occupying a horizontal position, a type arm pivotally supported in the free end ot' the major bar having a double faced type hammer at its free end and an extension beyond its pivoted end, a minor bar pivotally supported between the major bar support and the type hammer operating within the slot of the major bar and engaging the end of the type arm extension, means for shifting the minor bar support, means for swinging the major bar into a vertical position, whereby the minor bar is caused to swing the type hammer so as to selectively bring-either :tace of the same into vertical contact with the front of the platen, a guide for the major bar keeping the same vertically alined, a spur on the minor bar and a notch in the guide adapted to receive the spur and to thereby insure a proper alinement ofthe letters on the platen.

EDWARD WINTERER.

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