US391822A

US391822A - Alexander w

Info

Publication number: US391822A
Authority: US
Publication date: 1888-10-30
Anticipated expiration: 1905-10-30

Description

(No Model.)

A. W. STEWART.

GHAIR.

Patenfied oot. 80

TATES c' a E ALEXANDER XV. STEVART, OF OINOINNATI, OHO, ASSIGNOR TO THE ROBERT MlTOI-IELL FURNITURE COMPANY, OF SAME PLACE.

CHAIR.

SPECIPICATION forming part of Letters Patent No. 391.822, date October 30, 1:888.

Application filed July 1` 1886. Serial No. 206,761.

T0 all whom it may conccrn:

Be it known that I, ALEXANDER W. STEW- ART, a resident of Cincinnati, in the county of Hamilton, State of Ohio, haveinvented certain new and useful Improvements in Chairs, of which the following is a specification.

The various features of my invention and the advantages resulting from their use, conjointly or otherwise, will be apparent from the following description.

In the accompanying drawings, forming part of this specification, Figure 1 is a Vertical central section of a chair embodying my improvement. Fig. 2 is a section taken at the line x w, Fig. 1, the legs being broken off. Fig. 3 is a Vertical central section of the bearing in which the stem supporting the ehair works. Fig. 4 is a perspcctive view of achair enibodying my improvements.

The ehair belongs to the general class of rotating and tilting chairs. The base consists of a number of legs, A, preferably four, united at the bearing B. The bearing B is cylindrical, and is provided at its top with a flange,b. The legs A rest against the bearing, as shown in Fig. 2. Each leg is secured in its position by a bolt, O, which extends from the fiange b through that part of the leg A which lies under the flange b, and then through the washer b'. The washer encircles the bearing B and slides upward thereon as the serews C are tightened, and thus is caused to -tightly and securely elamp the legs A to the bearing B, the fiange b forming one jaw or face of the clamp and the washer b' the other or opposing jaw of said clamp. A trangular block, D,is placed in each of the spaces between adjacent legs. These blocks accuratelyfit these spaces and form very efficient braees, strengthening the base materially. They are preferably held in place by gluing, but may bc seeured in position by more substantial means. The stem E,

rigidly attached to the casting F, is provided with a screw-thread, which fits the thread on the inside of the bearing B. The casting F is provided with two arms, f, which project laterally, and are journaled in the bearings g,attached to the ehair-bottom G, and constitute The spring the axis on which the ehair tilts0 (No model.)

H, preferably composed of several leaves, is securely attached to the casting F and projects backwardly, its tip fitting under the back part of the seat G., A bearing, g', is preferably provided to protect the wooden frame.

Vhen the ehair is tilted back, its niotion is finally checked by the arm F',projecting rearwardly from the casting F, The casting F is also provided with an arm, F2, which projects forwardly and upwardly under the front edge of the Chair-seat G. A thumb-serew, I, is serewed up through the end of the arm F, and is provided at its upper end with a eap, The front edge of the ehair-seat rests on the cap i, a buffer on the seat preferably for'ming the immediate bearing. Normally the spring H keeps the chair-seat against the eap i. When, however,the person occupying the chair throws his weight backward, the chair tilts backward against the pressure of the spring H, and, if the weight be sufficient, the chair is forced backward until the bearing g, rests on the arm F'. On releasing the Weight the spring H forces the chair forward until it rests on the top of the serew I. By raising or lowering the screw I the inclination of the seat of the chair, when not tilted, is adjusted to suit the convenience of the individual using it.

A feature of considerable importance is the construction of the bottom of the chair. The ring G, which carries the seat proper,is made, as usual, in segments. Under the ring G is a doWnWardly-projecting rim, G', also made in segments. The segments of the ring G and the rim G' are so arranged as to break joints, as shown in Figs. 1 and 4.

What I claim as new, and desirc to secure by Letters Patent, is-

1. In a tilting-chair, the combination of a the stern and bearing against the seat for rais ing its rear portion, and a set-screw carried by the stem acting against the tension of the spring` .for contact With the seat to limit the forward movement thereof, snbstantially as described.

3. In a tilting-chair, the anterior verticallystationary support provided with an adj listingscrew, and the spring, as H, for raising the rear portion of the chair and keeping the front portion of the seat against the adjusting-screw when the oecupant of the chair is not lcaning back, substantially as set forth.

4. In a tilting-chair, the combination of the chair bottom or seat and the spidcr or casting F, having arms ff, to which the Chair-seat is journaled or pivoted, and also arm F2, and spring H, set into arm F2, and having its free end impinging against the rear portion of the chair-seat and rear arln, F, the forward arxn, F, being provided With the-adjusting-screw I,

against which latter the anterior portion of the chair-seat rests, except when the chair is tilted backward, substantially as and for the purposes specified.

5. In a tilting-ehair, the combination `of the chair bottom or seat and the spider or casting F, having' arrnsf, to which the Chair-seat is journaled or pivoted, and also arin F2, and flat spring H, set into arm F2, and having its free end irnpinging against the rear portion of the chair-seat and rear arm, F, the forward arm, F2, being provided with the adj usting-screw I, against which latter the anterior portion of the Chair-seat rests, except when the chair is tilted baokward, substantialiy as and for the purposes specified. i

ALEXANDER W. STEWART. Witnesses:

D. T. RoBB, O. M. HILL.