US1165547A - Line-spacing adjustment for type-writers. - Google Patents

Description

Z. G. SHOLES! LINE SPACING ADJUSTMENT FOR TYPE WRITERS APPucmo'N men APR. 23, 1915.

1 165,547. Patented Dec. 28, 1915.

aww/ntoz abtqzmm wmm m w g Q ZALMON G. SHOLES, F WILMINGTON. DELAWARE, ASSIGNOR, BY MESNE,ASSIGN- MENTS, TO SHOLES STANDARD TYPEWRITER COMPANY, OF WILMINGTON, DELA- WARE, A CORPORATION OF DELAWARE.

LINE-SPACING ADJUSTMENT FOR TYPE-WRITERS.

Specification of Letters Patent.

Patented Dec. 28, 1915 Application filed April 23, 1915. Serial No. 23,443.

' To all whom it may concern:

"Wilmington, in the State of Delaware, have shaped portion of-the frame 18 and the.

invented a certain new and useful Improvement in Line- Spacing Adjustment for TypeWriters, of which the following is a full and clear description. r

Various constructions have been devised whereby the platen of a type-writer might be provided with a spacing ratchet capable of being disconnected from the platen at will to permit the same to be rotated freely by hand to bring a given line on the paper to the printing point. I

My present invention relates to an inexensive sim le and easil assembled construction for the above named purpose, having the advantage that it prevents any spreading pressure from being brought to bear on the sides of the frame in which the platen shaft has its bearings. The consequence is thatthere is no binding 'efiect on the platen, and it turns with equal ease at all times.

My improved construction is shown in a preferred form in the accompanying draw ings, wherein- Figure 1 is a plan view of my platen mounting, and Fig. 2 is an enlarged vertical section of the same.

The platen proper may have any desired structure. Inthe specific form illustrated there is an inner core 10 of wood or other suitable material fixed to end pieces 11, which me:' also be of wood or the like. A

filling 12 overlies the core 10, and is made' of a suitable sound-deadening material. Finally a rubber covering 13 envelops all.

A conical head 14 is fixed to the platen, as by screws 15, and the platen shaft 16 is fixed to this head, carrying a handle 17, and having a bearing in one side .18 of the frame.

The spacing ratchet 19 is located upon the periphery ofthe hollow conical head 20, and this head has a cylindrical extension sleeve 21 which serves as a bearing for the shaft 16, and is itselffree to revolve in a ring 22'. This last named ring is carried by a suitably The sleeve 21 has a circumferential groove which isentered by a short screw pin 24,

passing through the ring 22 on one side; whlle, on the opposite side, the end of the handle 25 also passes through the ring 22 and enters the groove on the sleeve 21. The handle 25 projects outward through a cam groove 26 in the covering plate 23.

Outside of the frame 18, the spiral spring 27 surrounds the shaft 16,,being preferably protected by the thimble 28. One end of this spring presses against the outer face of the sleeve 21, while the opposite end presses the thimble 28 against the hub 29, made fast, with the attached handle 17, on the shaft 16. It will thus be seen that the normal action of the spring 27 is to force the hollow cone 20 over the male cone 14, thus connecting the ratchet 19 with the platen, to permit of control of the latter as usual by'the spacing lever 30 and pawl 31. It is clear that, since the force that presses the cones together for this purpose is a thrust having its outer abutment on the hub 29 which is fast on the shaft, the framework is relieved from all pressure from this cause, and all binding pressure on the platen is prevented.

When it is desired to disconnect the ratchet and platen temporarily, the handle 25 is moved backward into the position shown in Fig. 1. This compresses the spring by the action of the cam groove 26, and relieves the pressure between the two cones 14 1. In a typewriter, a frame, a shaft having bearings in said frame, a platen on said shaft, aspacing ratchet revolubly mounted on said shaft. within said frame and adapted to make frictional contact directly with an extension fixed .tosaid platen, an abutment fixed to said shaft outside of said,

frame, a spring adapted to be normally compressed between said abutment and said ratchet body, and means for effectively reducing the pressure exerted by said spring through said ratchet body upon said extension on the platen.

2. In a typewriter, a frame, a platen having a frictional head, a shaft for said platen, a spacing ratchet having a body adapted to make frictional connection with said head and also having a-sleeve surrounding said shaft and passing through said frame, an abutment fixed to said shaft outside of said frame, a spring between said .abutment and said sleeve and means for said spring through said sleeve and ratchet upon said frictional head, I 3. In a typewriter a frame, a platen having a conical head, a shaft for the platen, a hollow cone'fitting said head and carrying aspacing ratchet, a sleeve extending from said'hollo'w body, said sleeve passing through said frame and forming a bearing for said shaft, an abutment on the shaft, a spring surrounding said shaft and normally compressed between said abutment and said sleeve, and means adapted to remove said hollow cone from said head on the platen.

ZALMON e. sHoLEs.

fiopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, 1). 0. Y I

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