US903790A - Chair. - Google Patents

Description

v 1); SOHUSTEK.

CHAIR.

APPLICATION FILED NOV. 6, 1907.

Patented Nov. 10,1908.

UNITED STATES PATENT ornrcn.

DANIEL SOHUSTEK, OF OAK PARK, ILLINOIS, ASSIGNOR TO ALFRED H. ANDREWS, OF

- CHICAGO, ILLINOIS.

CHAIR.

Specification of Letters Patent.

Patented Nov. 10, 1908.

Application filed November 6, 1907. Serial No. 400,953.

To all whom it may concern:

Be it known that I, DANIEL SoHUsTnK, a citizen of the United States, residing at Oak Park, in the county of Cook and State of Illinois, have invented certain new and use ful Improvements in Chairs, of which the following is a specification.

This invention relates to improvements in chairs, and in its principal feature of improvement pertains to a novel means for supporting the back of the chair in various positions of angular adjustmentrelatively to the bottom.

My improvements are more especially de signed and adapted for that type of chairs wherein the bottom is supported and adjusted as to height by a single screw-threaded post or standard engaging a socket in an underlying pedestal, and are herein shown as embodied in a chair of that type, although capable to some extent of being employed advantageously in other types of chairs.

The object of my invention is to provide simple, comfortable, inexpensive, and easily adjustable chair of the character specified.

The invention will be readily understood when considered in connection with the ac companying drawings illustrating a pre ferred embodiment thereof, in which,

Figure 1 is a side elevation of the complete chair equipped with my improvements. Fig. 2 is a bottom plan view, broken away on one side, of the chair bottom, more particularly illustrating the means for adjusably and elastically connecting the back of the chair to the bottom. Figs. 3 and 4: are detail elevational views in vertical section through a part of the back-adjusting means. Fig. 5 is a detail sectional view on the line 55 of Fig. 2, looking in the direction indicated by the arrows.

The chair shown in the drawing is of the type commonly known as a typewriter chair,a type also quite extensively used as a ladies shampoo chair.

6 designates a pedestal of usual form having the divergent feet 7 and central internally threaded socket-member 8 engaged by the screw-threaded post 9, the upper end of which latter is secured centrally in a bracket plate 10 secured to the under side of the circular chair bottom 11, as by screws 12.

13 designates a wooden back that is mounted by means of a bracket casting 14 secured thereto on a pair of bent rod supports 15, the upper ends of which latter enter socket-members 14 of the bracket casting 14:, and at their lower ends are turned inwardly beneath the bottom 11, and are pivotally secured by semi-circular bearings 16 formed integral with a yokeshaped casting 16 that underlies the rear edge of the seat or bottom 11.

Keepers 17 secured to the under side of the seat 11 as by screws 18 overlie and clamp in place the end bearings 16 of the yoke 16; said keepers being formed, as shown in Fig. 5, with rounded depressed portions 17 a adapted to accommodate the angular play of the rearwardly turned extremities 15 of the back-supporting rods 15; which inwardly turned extremities prevent the accidental displacement of the' rods 15 from operative position.

The yoke 16 is maintained yieldingly in elevated position in contact with the lower side of the seat 11 by means of a powerful bent wire spring, which spring has a central loop-shaped member 19" embracing a depending rib or lug 16 located centrally of the yoke 16, and oppositely extending arms 19 terminating in inwardly bent end portions 19 The arms 19 are journaled in rearwardly extending lugs 10 formed integral with the bracket 10, and the inwardly bent ends 19 of the spring are rigidly clamped against the bottom of'the seat by the keepers 17. A headed screw 20 (Fig. 2) passes loosely through a hole in the yoke 16 and screws into the seat 11 from the under side, and serves to limit the downward swing of the yoke 16 relatively to the seat in opposition to the upward thrust of the spring. v

Fitted to a central socket-member lt of the back-supporting casting 14 is a bracerod or strut 21, the lower depending portion of which is bent to a zigzag form, as shown in Figs. 1, 3 and 4, presenting a series of alternately oppositely disposed short turns or angles 21 and 21 and terminating at its lower end in a small knob or button conveniently formed by curling up the extreme end of the rod into an eye, as indicated at 21.

Integral with the yoke 16 and extending rearwardly of the center thereof is a supporting bracket 22 for the brace 21, the outer end of which bracket is vertically apertured, as shown in the plan view Fig. 2,

and is provided on one side of said aperture with an instanding lug 23, the opposite sides of' which are preferably slightly concaved, as shown. The lug 23 extends about half way across the opening of the bracket, leaving, on one side of the opening, a space A through which the Zigzag end of the brace can move up and down freely. The brace 21 possesses suflicient elasticity to enable it to be readily sprung laterally between the space 24L in which it is freely movable for purposes of adjustment into either of the notches between the central lug 23 and the front and rear edges of the opening of the bracket. 'When said brace is sprung laterally into engagement with the lug 23, to either side of the latter, as shown in Figs. 3 and 4, the bends or angles 21 and 21 are engaged and confined against downward movement by said lug and the end walls of the opening, thereby rendering the brace rigid with said bracket and supporting the back of the chair in any position to which it may be adjusted. Adjustment of the back may be effected by moving the brace 21 into engagement with either of the notches on opposite sides of the lug 23, as shown in Figs. 3 and 4:; but a somewhat finer adjustment is obtainable by the use of both of the locking notches provided on opposite sides of the lug 23 than by either of them alone, and consequently the construction illustrated and described is preferred, although a single lockin notch is o erative to effectuate the a purposes of the invention, and is within the latter.

From the foregoing it w1ll be observed that my invention provides a constructlon of chair back wherein the back is mounted with capacity for adjustment by a simple manipulation of the brace 21 at varying angles to the chair bottom suited to the preference or inclination of the user of the chair, or the adaptation of the latter to any particular purpose; and at the same time the back is elastically yieldable under a leaning pressure of the occupant.

I claim:

1. The combination with a chair bottom, of a back pivoted thereto, a brace connected to said back, a bracket pivoted to said bottom and having an opening therein for the passage of said brace, cooperating stop devices formed on said brace and bracket, respectively, adapted to support said back in a number of adjusted positions, and a spring engaging said bracket and opposing the downward thrust of said brace, substantially as described.

2. The combination with a chair bottom, of a back pivoted thereto, a brace connected to said back, and a bracket connected to said bottom and having an opening therein for the passage of said brace, said bracket having on one side of the opening therein an instanding lug forming on either side thereof locking notches, and said brace having its lower portion bent in zigzag form, providing a plurality of inclined surfaces adapted to interlock with said notches and support said brace in a number of adjusted positions, substantially as described.

DANIEL SCHUSTEK.

\Vitnesses:

SAMUEL N. POND, L. F. TVTCCREA.

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