US117915A

US117915A - Improvement in chairs

Info

Publication number: US117915A
Authority: US
Publication date: 1871-08-08
Anticipated expiration: 1888-08-08

Description

JACQB MORRISON.

Improvement in Chairs.

117,915. Patented August 8, 1871.

Wifn'esses.

UNITED STATEs PATENT OEEIoE.

JACOB MORRISON, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO HIMSELF AND CALVIN A. ELLIOTT, OF SAME PLACE.

IMPROVEMEN T IN CHAIRS.

To all whom it may concern:

Be it known that I, JAooB MonRIsoN, of Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Improvement in Chairs, and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawing making a part of this specification, in Which Figure 1 is a vertical sectional view as indicated by the line 00 m. Fig. 2 is a view of the under side of chair, showing spring and arm devices.

Like letters in both figures of the drawing indicate like parts.

My invention consists of an adjustable and yielding back arranged to move in the arc of a circle through sockets or other equivalent bearings in the seat of the chair by means of arms pivoted to the under side of the seat, and constructed so as to embrace firmly the lower ends of the standards of the back, in combination With springs suitably arranged to give the back the necessary yielding movement, the downward movement of the back being regulated by its bottom rail being placed at a suitable distance above the top of the seat; the object of the invention being to make the back adjust itself more perfectly to the back of the person without producingany uncomfortable feeling thereon.

A is the seat; B, the back; 0, the arms; and D, the springs. As the back is designed to move in the arc of a circle from an axis fixed in the center of the seat, it follows, therefore, that the shape of the lower part of the standards of the back should be made to that curve, in order that they may work properly in the sockets to o f the. seat, the sockets consisting of etaili boxes set in mortises made in t he wat to receive them, and corresponding in shape with that part of arms 0 are provided with sockets b, or constructed so as to embrace the bottom ends of the standards of the back and fastened thereto by screws. The opposite ends of the arms are attached by pivot-screws c to the under side of the seat, in such a manner as to allow the back to move in the arc of a circle. Thus the person, when seated and leaning back, depresses the back of the chair down in the line of that curve, bringing it in a comfortable position to support the back, and when leaning forward, the springs D bearing upon the bottom ends of the standards of the back will cause it to rise upward and adjust itself comfortably to the back of the person in that position. These springs are attached by screws to the under side of the seat alongside of the arms, and arranged to bear upon the bottom ends of the standards of the back, as above described. The downward movement of the back is regulated by its bottom rail d being placed at a suitable distance above the top of the seat, so that, when pressed down by the reclining of the person against it, the rail will come square upon the seat, and, of course, prevent its going any further.

Having thus fully described my invention, what I claim therein as new, and desire to secure by Letters Patent, is

1. The adjustable back of a chair, arranged to move in the arc of a circle through sockets in the seat thereof by means of pivotal arms 0 and springs D, substantially as shown and for the purpose set forth.

2. The construction and arrangement of the adjustable back B, rail d, seat A provided with metallic sockets or, arms G, and springs D, all -substantiallynasshown. and described.

JAGOBMORRISON. Witnesses:

SAML. G. VANCE,

the standards of the back just described. The

G. B. ToWLEs.