US839393A - Specialist's chair. - Google Patents

Description

W. H. KERSEY.

SPEGIALISTS CHAIR. .uzrmouxon FILED 1113.23.1903.

THE mmms PETERS cm, WASHINGTON, o. c.

P'ATENTBD DEG. 23,1303.

UNITED STATES PATENT OFFICE."

' WILLIAM H. KERSEY, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO CLARK & ROBERTS COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION OF INDIANA.

To all whom it may concern/p Be it known that I, WILLIAM H. KERSEY,

a citizen of the United States, residing at In dianapolis, in the county of Marion and State ofIndiana, have invented certain new and useful Improvements in: Specialists Chairs, of which the following is a specification.

The object of my invention is to produce an all-metal specialists chair which may be manufactured cheaply, but which willbe effiing supported by legs 11, formed from round rods. Casting is provided at its forward end with a vertical threaded opening through which passes the threaded rod 12, which supports a round metal seat 13. Casting 10 at its rear end is provided with a pair of up-- wardly-extending ears 14, between which is pivoted at the lower end of the back 16.

In order to hold the back 16 in any position of adjustment about the'pivot 15, I provide said back at its rear near its lower end with an arm 17. Pivoted' to arm 17 on the horizontal axis 18 is around rod 19, the lower end of which extends through an opening 20, formed through a pawl 21, pivoted at 22 to casting 10, the opening being slightly larger in diameter than the diameter ofrod 1 9.

Pivotally mounted between the lower ends of the legs 11 is a bar 25, provided at each end with a foot-piece 26. Bar 25 is drilled at each end to form an opening 27 to receive a pin 28, projectable' into a corresponding opening 29, formedin the adjacent leg 11. Bar 25 is substantially the full length between the legs 11, and in order to assemble the parts hole 27 is sufliciently deep to permit pin 28 to be projected into the foot-lever 25 and then be brought into alinement with the opening 29, whereupon the pin 28 may be dropped into the opening 29 and the parts held in position by a small set-screw 30. .Bar 25 carries an arm 31, rovided in the upper face of its outer end with a socket 32, adapted to receive the lower end of a rod33, said rod being pivoted in the socket on a horizon- SPEClALl STS CHAIR.

Specification of Letters Patent. Application filed August 23, 1906. Serial Non 331,686-

bracing rod 19 below pawl 21.

- Patented Dec.-25, 1906.

.- tal pin 34. Rod 33 at its upper end is bent to form a substantially horizontal eye em- In order to prevent eye 35'from slipping from the lower end of rod 19 I provide the lower end of said rod with'a slight projection 36.

The back 16 at its upper end is provided with a rearwardly-projecting stud 40, carrying a clamp 41, which in turn carries a rod 42, provided at its upper end with a clamp 43, through which passes the stem 44: of the head-rest 45. Any adjustment of the back toward the upright position is readily accomplished by merely swinging the upper end of the back toward the vertical, the rod 19 slipping upward through the pawl 21 without resist- A return toward -a lower position, however, is prevented by reason of the fact that the pawl 21, tending to swing downward, pinches rod 19. When an adjustment toward a lower positon is desired,.the operator presses upon either of the foot-pieces 26, thus throwing the foot-lever and rod 33 to the position indicated by the dotted lines in Fig. 2, the eye 35 coming into engagement with pawl 21 and throwing the same upward to a point where the hole 20 is in alinement with rod 19, so that said rod maybe slipped downward through said hole without resist ance. As soon as the foot-lever is released, however, the pawl promptly pinches rod 19 and prevents any further lowering of the back.

I claim as my invention 1. In a chair, the combination, with the base, ofa vertically-adjustable seat member carried thereby, a swinging back pivoted thereto, a rod pivoted to said back and depending therefrom, a pawl pivoted to the ase and provided with an opening through which said rod is passed, a foot-lever, and a rod carried by said foot-lever and adapted to engage said pawl to carry the same toa releasing position.

2. In a metal chair, the combination, with the main casting, the supporting-legs, and the back-supporting ears, of a back pivotally attached to said ears, a rod pivoted to the back and depending therefrom, a pawl pivo'ted to the maincasting and provided with an opening through which said rod passes, said 0 ening being such as to pinch upon the rod w en out of alinement therewith, a footlever pivoted between the rear legs, and a rod pivotally connected at its lower end to the foot-lever and at its upper end provided with an eye embracing the depending rod below the pawl, substantially as and for the purpose set forth.

3. In a metal chair, the combination, with the main casting, the supporting-legs, and the back-supporting ears, of a back pivotally attached to said ears, a rod pivoted to the back and depending therefrom, a pawl pivoted to the main casting and provided with an opening through which said rod passes, said opening bein such as to pinch upon the rod when out of a inement therewith, a footlever pivoted between the rear legs, said footlever at one end having a pin-receiving bore,

WILLIAM H. KERSEY.

WVitnesses RICHARD B. ROBERTS, THOMAS H. ROBERTS.

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