US812680A - Back-spacing attachment to type-writing machines. - Google Patents

Description

PATENTED FEB. 13, 1906.

G. A. RINE. BACK SPAOINGATTAGHMBNT T0 TYPE WRITING MACHINES.

APPLICATION FILED JUNE 20, 1904.

2 N w z W BM G, H M

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BACK-SPAClNG ATTACHMENT T0 TYPE-WRITING MACHINES- Specification of Letters Patent.

Application filed June 20, 1904. Serial No. 213,303.

To all whom, it may concern:

Be it known that I, GEORGE A. RINE, a citizen of the United States, residing at Williamsport, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvements in Back-Spacing Attachments to Type-Writing Machines, of which the following is a specification.

This invention relates to a back-spacing attachment to typewriting machines, and particularly to one having special utility in connection with the Remington and similar types of machines. I

Referring to the drawings, Figure 1 is a rear elevation, partly in section, of a Rem; ington type-writer provided "with my new back-spacing mechanism, and Fig. 2 is a pers ective view of the back-spacing mechanism etached from the machine. I

Like reference-numerals designate corresponding parts in both the figures in the drawings.

Since the construction-of the Remington machine is familiar to all skilled in this art, it will be sufficient herein briefly to refer to old and well-known parts thereof. The carriage is provided with the usual rackand-pinion mecha is through which by means of the cact -lament.feel and its coacting dog the movements; of the-carriage in its travel from right to left are controlled. On the inner end of the pinion-shaft is fast the pinion of this rack-and-pinion mechanism, and on the other end thereof is fast a disk. The escapement- .Wheel is mounted loose upon said pinionshaft and is connected with the disk in such manner that in the travel of the. carriage from ri ht to left the disk drives the escapementw heel; but when the carriage is'moved in the reverse direction the disk rotates without driving the escapement-wheel, which remains stationa This mechanism being well-known toal skilled in this art is not illustrated in'the drawings. The parts hereinbefore described 'areold, and as heretofore made the disk has had a smooth peripheral 1 surface. By a simple chan e in a sing of these old members and t e provision of a,

e one pawl-carrying lever suitably connected with a key I am able to equip the common Remdevice, and this simple change in the member in no Wise interferes with the erformance of its former functions, but ena les itto perform new functions in the operation of moving the carriage from left to right space by space or backspacing.

The disk 3 is provided according to the present invention with ratchet-teeth adapted to coact with the pawl 6, controlled by the spring 12 and mounted upon the back-space lever 9.. As previousl stated, this disk has heretofore been provi ed with a smooth peripheral surface. Disk 3 is mounted fast on the pinion-shaft 15 and abutting the looselymounted'escapement-wheel 2 previously referred to, and, as previously stated, the disk 3 Patented Feb. 13,1906;

drives the escapement-whe'el 2 during the v,

movernent of the carriage from right to left,

but permits it to remain stationarywhile it (the disk) itself rotates during the reverse movement of .t e carriage.

The bac spacelever 9 is fulcrumed in the hanger 11 atlO and by suitable link connections 13 is connected with the back-space key 14. A spring 1 1 thrc vs the right arm of the lever '9 down and normally retains said arm in such position, so that the pawl 6, which is guided to the teeth of disk 3 by the aperture 6* in the frame, normally rests below and out of engagement with said'teeth.

The operation is as follows: Depression of the back-space key 14 throws the right arm of lever 9 up against the tension of the spring 11 and thereby causes the pawl 6 to move upwardly through uide-aperture 6 and engage a tooth of and rotate thedisk 3 backward, and thereby move the carriage one space from left to right. Subsequent to the described movements of the lever 9,, pawl 6, and disk 3 the spring 11 serves to move the right arm of the lever downwardly, so as to carry the pawl out of engagement with disk 3,

as before mentioned. The office of the spring 12 is to press the pawl 66 toward the left, so as to assure said pawl pro erly engaging one of the teeth of the disk 3 w en the pawl is moved upwardly in the manner before described. In

forward spacing the dog 1 coacts with the escapement-wheel 2 in the usual manner. What I claim is- In a type-writing machine, the combina- Ido tion of a frame, the shaft of arack-and-pinion mechanism, an escapement-wlieel loose ong,

said shaft, a disk fast on the shaft and arf ranged to cooperate in the ordinary-manna with the escapement-wheel; said disk having ratchet-teeth, a lever fulcrumed at an intermediate point of its length in the frame, a backspace key connected with one arm of said le- O ver, a sp g ressed, pawl carried by the In testimony whereof I aflix my signature other arm 0 tfie leverv and arranged to turn in presence of two'witnesses. thedisk through the teeth thereof, means for gu iding saidpawl in its vertical movements, GEORGE RINE' 5 and a spring arranged tovmove. the last-men- Witnesses:

tidnedarm of the lever downwardly subse- ANNA WILLIAMSON,

quent to upwardmovementof said arm. HARRY PARSONS.

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