US550396A - Adjustable chair - Google Patents

Description

(No Model.)

J. A. W. SBABBRG.

ADJUSTABLE CHAIR.

UNITED STATES* PATENT OFFICE.

JOHN A. XV. SEABERG, OF CHICAGO, ILLINOIS.

A DJUSTABLE'CHAIR.

SPECIFICATION forming part of Letters Patent No. 550,396, dated November 26, 1895. Application led February 19, 1894. Serial No. 500,803. (No model.)

To all whom it may concern:

Be it known that I, JOHN A. W. SEABERG, a citizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Adjustable Chairs, which are fully set forth in the following specication, reference being had to the accompanying drawings, forming a part thereof.

This invention relates to chairs which are designed to be adjusted from upright to reclining position and secured at various stages of adjustment; and it is particularly designed to provide a simple and easily-adjustable chair suited for use as an infants chair and to be suspended in the form of a swing or to stand on the floor when adjusted to a sitting posture, and also to be placed upon the seat of an ordinary chair to serve as an infants high chair or table-chair.

The invention consists in the details of adjustment, as set forth in the claims.

In the drawings, Figure l is a side elevation of my improved chair, showing it adjusted to a usual sitting posture. Fig. 2 is a front elevation of the same. Fig. 3 is a side elevation showing it adjusted to a reclining posture. Fig. lis a detail section at the line 4 4 on Fig. l. Fig. 5 is a detail side elevation of the chair and foot-rest supports and adjustable connections of the back, showing a modiiication of these back connections.

A is the seat, which may be supported in any manner, but is represented as suspended by means of the cross-bar B, from which the side bars or rods B B extend to the seat. I have also shown arms A A both for the purpose of supporting a tray C and for the purpose of stiffening the connection of the seat with the suspending-rods B, a clip b at the point where the rod crosses the arm affording means of attaching the two parts rigidly at that point. The action of the adjusting devices which connect with the back and footrest, hereinafter described, should be considextend below the pivotal connection d, for the purpose hereinafter stated.

E is the foot-rest, which comprises the side bars E E and is suspended'from the seat by means of two pairs of links E2 and E3, respectively, at opposite sides of the seat, the links E2 being pivotally connected with the forward edge of the seat and the links Eat a point near the rear edge, the foot-rest being in the form shown horizontal when the forward links E2'hang vertically, and the rear links E3 being at that stage in the principal form divergent rearward form the links E2 to their connections with the rear ends of the side bars E E', respectively. links E3 are slotted longitudinally, the slot c3 serving to afford a sliding pivotal connection with the side bar D of the back at each side. A'clamp F on the pivotrod f is provided to effect the pivotal connection and to clamp the parts together at any position to which they may be adjusted. A partial equivalent of this mode of connecting the back and the rear links of the foot-rest is shown in the modification represented in Fig. 5,l in which the lower end of the side bar D' The rear normally bears against the rear edge of the link E3 and is provided with a terminal forked clip D10, the fork of which clasps the link E3 to retain the side bar of the back in proper relation to the link laterally, the crotch of the fork being adapted to engage in any one of the notches e30 made in the rear edge of the link E3, the link in that case not having the slot shown in the other form. A clamp-screw F may be provided in this form also, which, by springing the bars of the fork D10 together, may cause the bar to be retained in the relation to the link E3 to which it may be adjusted from time to time. I have shown, also, in Figs. l, 2, and 3 links G G, having pivotal connection with the support of the chair-to wit, the cross-bar B-and also with the back of the chair at g, these links having two parts G and G', which slide upon each other with the effect of a telescoping link, a clamp-screw G10 being provided in one of the slides, by which they may be secured in any position to which they may be relatively adjusted, thereby making the link extensible and reducible at will.

With the construction described, when the ICO back is tilted down toward the reclining position the foot-rest swings forward and upward toward the position shown in Fig. 3; but by reason of the uncquality of the links E2 and E3 the movement of the foot-rest is not parallel-that is, its diiferent positions are not parallel with each other; but, on the contrary, from having been substantially horizontal at the first position (shown in Fig. l) it becomes inclined upward at the forward edge considerably in the reclining position. (Shown in Fig. 3.) The forward links E2 hav-` ing been vertical at the commencement of the movement are at the close of it horizontal, and being connected across the front by a board c2 this board constitutes an extensionof the seat A when the horizontal position is reached. The back in this position is inclined slightly upward from its pivotal connection with the seat, the foot-rest in like manner being inclined upward from its pivotal connection at what is the forward edge of the seat extension formed by the links E2 E2 and their connecting'- board e2 when the device is adj usted toithis rei clining position.

In the form shown in Fig. 5 the footrest will normally take the position shown under the action of gravity, and the back will also l normally take the position in which it is illustrated, being stopped at the lower end of the bars I) by the engagement of thoseV `bars against the rear edges of the links E3. Then the clamp F is tightened, the foot-rest and? back will be secured relatively to thefseat in the positions to which they may be adjusted;

or without fastening the clampF the link G G', being secured by its clamp-screw at ad justed length, will hold the parts in whatever relation they may be placed. It will be desii-able sometimes to use both of these fasten- A ings for greater security, but obviously `either might be dispensed with and reliance placed f at both sides, interposing between the linksv on the rod the sleeve or tube f', the rod being This means consists in A headed at one end outside the side bar D and provided with the clamp AF at the other end outside the other side bar, a block F2 being interposed between the link and the side bar D at each side when the link is hung from the inside of the seat side bar, as shown in Fig. 4: By this meansthe clamp simultaneously tightens both joints, so that only one clamp is necessary.

I claim-2 l. In an adjustable chair in combination with the seat having `a suitable support, the back pivoted to therear edge of the seat, the foot-rest suspended from the seat, the forward suspending device being pivoted at the forward edge of the seat, the rear suspending device having sliding pivotal connection with. theback which is extended below its pivot to theseat for that purpose, substantially as set forth.

2. In combination with Athe seat suitably supported afoot-rest suspended from the seat and adapted to swing upward and forward on the suspending-devices, thebackpivoted to the seat at the rear and having arms extend= ing below L the pivot, said `arms adapted to slide on the rear suspending devices of the footercst, anda clamping device to secure said back extensions at any positiontowvhich they may slide on said `suspending `devices,` substantially as set forth.

3.' Inan' adjustable chair in combination with the seat suitablysupported,the foot-rest suspended from the seat, the backpivoted to the seat and extended below its pivot and connectcdto the suspendingdevices of the footrest, and the extensiblelinks G G connected at one end to the back aboveits pivot and at the other end to a support iilxed with respect tothe seat and clamps-'to secure the links at any desired degreeof extension,substantially asset forth.

Inftestimony whereof I have hereuntoset my hand, in the presence of two witnesses, at Chicago, Illinois, this 31st day` of January, 1894.

JOHN. A; w. sEABERG.

Witnesses:

CHAs. S. BURTON,- .TEAN ELLIOTT.

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