US1713034A - Adjustable chair - Google Patents

Description

May 14, 1929. T. M. DENSON ET AL 1,713,034

ADJUSTABLE GI-IAIR Filed Oct. 24, 1927 unaway-'4 m Attorney Thomas M Benson wgg g Patented May 14, 19959 i l l ,1," u il t, W ilud Ellie ti i lt it little entice tlur invention relates to improwiinents in adjustable chairs which, while adapted tor various uses, are particularly designed for use by operators of linotype machines. liocause ot the position (it the low keyhoard oi linotypo .i'nacliines, the maerator is reuuited to use a low chair that must he adjustable tor his cmiveuieuce and comfort. The chair of: our invention is prov ded with a seat that is vertically adjustable, and also capable of being tilted either to the .l' 'ont or to the rear, and the adjustable seat is protitled with a back that also is capable oil? iuljustiuent with relation to the seat. Our intention consists in certain novel Cll1l,)1 nations and arrang 'enients of parts whereby the various adjustments may be accomplished with facility and coutenieuce as will lei'einalter be more fully pointed out and claintied.

liu the accompanying drawings we have illustrated. one comjilete example ot the physical GHIlXMlllllOllt of our invention wherein the parts are coinluned and arranged according; to the host mode we have thus tar devised for the practical application of the principles of our invention. The parts thus combined and arrailged comprise a minimum number of elements that may he assembled with facility to term the chair, the parts are durable and simple in construction, and the adjustments may be accotnplished by simple o ierations.

llhgure 1 is a front perspective View oi: a chair according to our invention.

Figure 2 is a side View of the chair.

inure 3 is a side view of the chair with the seat tilted backwardly: and the back also tilted hacltwardly, at line (-23 F 1,91. 1..

li igiire l is a sectional detail View at line l l of Figure 2.

Figure 5 is an enlarged, sectional detail View showing the spring locking means for the adjustable seat. I

Figure 6 is a perspective View of a traginental portion of the rear of the seat showing method of adjusting; the seat and also the inclination of the chair back.

In carrying out our invention the supporting frame of the chair is preferably inade up of tubular legs as l, 2,3, and 4t that may be fashioned 0i metal pipe sections and joined by rungs 5 to form a r1gid base structure for the chair. The legs are of the same height and all provided with teet as 6, and at their upper ends are joined by a pair ol tubular side bars 7, 7, and a tubular front bar 8 and tubular rear bar 9, the side, rear and trout bars oi? course being horizontal. The horizontal bars and the vertical legs are joined together by use of the caps or castings 10 that have annular, threaded flanges in which the threaded ends oi the hairs and legs are screwed, and these caps as shown are hollow and couuni'luicate with the interior of: the tubular legs and bars.

The seat 55 is vertically adjustable with relation to the hase or frame oi the chair, and the adjusting parts are unhoolced through a pull. on either of the chains 11 or 1:2, the toriner at the front and the latter at the rear of the chair. The seat S issupported above the base or frame by means of tour posts 13, 14-, 15 and 16 that telescope in the four tulu'ilar legs, through the hollow caps or heads 10, and each 031 these posts is fashioned with a series of transverse bolt h0les17 tor the accounuodatiou of bolts l8.

There are four of these spring bolts 18, two in the front bar and two in the rear bar, at the ends of the bars, and the belts are designed to project through the bolt holes 17, in the posts, and through the bolt holes 19 in the outer walls of the caps, as best seen in Figure 5. Each holt has a slide head, as 20 that is reciprocahle in its tubulat bar, as S or 9, and a spring 21 is enclosed within the tubular bar and interposed between the adjoining inner ends oil" the slide heads 20 of each tubular bar to normally spread the bolts and force them into the bolt holes 17 of the posts and holes 19 of the caps to lock the posts in the legs, and. thus lock the seat 8 in adjusted position.

The bolt-releasing chains 11 and 12 are connected at their ends to screws as 22 that are passed through longitudinal slots 23 in the undersides of the front and rear bars and located near the ends of these bars, and it will. be apparent that a pull on the chain will withdraw the bolts from the caps and posts against the tension of the spring 21 to release the posts for adjustment. After the scat S and its posts have been adjusted, the chains are released and the bolts are projected into locking position.

The posts that telescope into the tubular, vertical legs are each fashioned with forks 2 1 that are pivoted or hinged at 25 at the front of the chair seat, while the two rear posts have pivot pins 26 that co-aet with slots 27 at the rear sides of the chair seat S to provide for angular adjustment of the seat S.

Thus it will be apparent that the seat S may, while in horizontal position be vertically adjusted with relation to the chair base or frame, and the seat may be tilted rearwardly as in Figure 3 or forwardly, if desired, by manipulation of the four spring bolts, v

The seat-back B may also be locked in ya rious positions relative to the seat, as indicated in FiguresQ and 3, and the locked back is released for adjustment by pull on a chain 28 that releases bolts 29 carried in the tubular bar 30 the locking and unlock ing action being the same as for the bolts 18. The tubular bar 30 is supported near the rear of and under the seat-back in brackets 31 and the bolts are projected through bolt ed to the seat S at 37 and to the seat bars at 38 to provide for the adjustment and rctention of the seat-back after the latter has been adjusted.

By manipulation of the three chains the locking devices may be released, and it will be apparent that the adjustable partsmay with facility be manipulated to the desired positions, after which. the parts are locked by release of the chain or chains.

Having thus fully described our invention what we claim as newand desire to secure by Letters Patent is The combination with a chair frame in cluding a pair of tubular legs, hollow caps thereon and a slotted tubular cross bar connecting the caps, of: posts telescoping said legs and provided with bolt holes adapted to aline with similar holes in the caps, a pair of belts in the cross bar adapted to engage the holes of the caps and posts, a spring within the cross bar interposed between the bolts, screws secured in the bolts and guided in the slotted cross bar, and a flexible releasing-connection between said screws exterior of the cross bar.

In testimony whereof we allix our sigma tures.

CHARLES F. WILLSIE. THOMAS M. DENSUN.

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