US176518A

US176518A - Improvement in type-writers

Info

Publication number: US176518A
Authority: US
Publication date: 1876-04-25
Anticipated expiration: 1893-04-25

Description

P. DEMING.

TYPE-WRITER. N0.175.518. Patented Apr125,1876.

diy/ o 'Z' G y e of @i WITNESSES z N. PETERS. PHOTO-UTHOGRAFHE, WASHINGTON. D C.

lUNITEJ) STATES PATENT OFFICE.

PHILANDER DEMING, OF ALBANY, NEW YORK.

IMPROVEMENT IN TYPE-WRITERS.

Specification forming part of Letters Patent N0. 17 6,5 1S, dated April 25, 1876; application filed February 21, 1876.

A of Albany, in the county of Albany and State of New York, have invented a new and Im- -proved Type-Writer, of which the following is a specification:

In the accompanying drawing, Figure l represents a sectional side elevation of vmy iniproved type-writer, with my double escapement attached; Fig. 2, a rear view of the same; and Figs. 3 and 4 are detail side views ot' the double escapement, showing it in position as feeding one and two teeth.

Similar letters ot' reference indicate corresponding parts.

The object of my invention is to so improve the well-known type-writers that they may be made available in effective manner for shorthand reporting, and also the speed ofthe same in copying common writing be considerably increased. l Y

lllhe invention consists of a double escapement in connection with the rack-bar ot' the carriage of the printing-cylinder., the escapement being operated by an anvil and key, that nay be brought in connection with the space- In the.drawing, A represents the key and key-lever of my double escapernent, which may be coupled by a pivoted button, c, to the space-key A1, if desired; In most cases it is advantageous to couple the spacebar tc the esc-apement-key A, as the former may be more conveniently reached and depressed `jointly with any other key of the key-board.

The keys of the key-board and the spacekey connect, by the usual cross-bar A2, with the front end ot' a spring-acted elbow-lever, B, that is fulcrumed to a stationary arm or bracket, D, operating, by its bifurcated upward-extending arm-B', the rack-bar ofthe carriage of -the printing-roller.

An anvil, E, is fulcrum-ed to the upper arm B' of the elbow-lever B, being connected at its inner or front end by a pivoted wire rod, b, to the key-lever A, and Weighted at the outer or' rear end, to carry the front end up again assoon as the key is released.l T he swinging motion of the anvil E is defined by stop-pins j' above and below the inner arm of the same.

The anvil E has an upward-extending lug, d, that engages the stop e of the swinging and weighted escapernent-lever C, which admits the printing-cylinder to advance one tooth, when disengaged from the rack-bar by the depression of a key, so as to produce the forward feeding of the cylinder carriage, tooth for tooth, in the `usual manner; but when the escapement-key A is depressed the lug d releases the stop e, and permits the swinging over of the weighted escapemeutlever C to double the width from the lever B, so as to allow the feeding forward of the rackbar for the space of two teeth. When, therefore, the vescnpement-key is depressed simultaneously with a common key, or with the space-key, the forward feeding of the printingcylinder to twice the common distance at the depression of a single key is-obtained, and thereby the means furnished to produce the spacing simultaneously with the depression ot' the key of the terminal letter of a word, without requiring the depression of the letterkey and space-bar in consecutive order. This saves the time hitherto taken up by the separate depression of the space-key, and increases not only the regular copying speed of the type-writer, but also adapts the same, in a very simple and reliable manner, 'for stenotypic purposes.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination, with the escape feed mechanism, of the additional escape feed mechanism, that produces the double escapement ot' the feed when its key is depressed, and allows ot' simultaneous working with a common key, substantially as and for the purpose described.

2. A Weighted anvil fulcrumed to the up-` per arm ot' the escape-lever, and operated by a separate key and key-lever, in combination with the swinging and weighted escapementlever of the feed mechanism of the typewriter, to admit single or double escapement ot' feed mechanism of printing-cylinder, as required, substantially in the manner described. l,

3. The Vcombination ot' anvil E, having the lug d, and fulcrumed to upper arm ot' leyer B, connected, by pivoted wire b, with the keylever A, and weighted at rear end'with the swinging and weighted escapement-lever C, having stop e, substantially as and for the purpose speciied.

Witnesses: PHILANDER DEMING.

JOHN D. GAPRON, JOHN HOMIGAN.