US622062A

US622062A - Smith n

Info

Publication number: US622062A
Authority: US
Publication date: 1899-03-28
Anticipated expiration: 1916-03-28

Description

No. 622,062. Patented Mar. 28, I899. S. N. MGGLUUD.

CHAIR.

(Application filed Aug. 19, 1898.

(No Model.)

IlNi'rnn STATES PATENT GFFICE.

SMITH N. MCCLOUD, OF MARYSVILLE, OHIO, ASSIGNOR TO THE DAVIS CHAIR COMPANY, OF SAME PLACE.

CHAIR.

SPECIFICATION forming part of Letters Patent No. 622,062, dated March 28, 1899.

Application filed August 19,1898. Serial No. 688,999. (No model.)

To (LZZ whom, it may concern:

Be it known that I, SMITH N. MOOLOUD, a

- resident of Marysville, in the county of Union and State of Ohio, have invented certain new and useful Improvements in Chairs; and I do hereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

The invention relates to chairs having backs adapted to tilt, and more particularlyto those in which the back tilts independently of the seat; and its object is to increase the simplicity, efficiency, and economy of the spring tilting mechanism.

The invention consists in the construction hereinafter described and pointed out.

In the accompanying drawings, Figure 1 is a partial side elevation showing the improvement applied. Fig. 2 is a bottom plan of the same. Fig. 3 is a rear elevation of a detail,

and Fig. 4 is an elevation of a modified detail.

Numeral 1 indicates a chair-seat, which may be of any desired style and construction.

2 denotes the seat or seat-frame support, which in the case illustrated has four arms fixed to the seat by screws 3. It is by preference made of iron, either cast or malleable.

4 denotes a screw-threaded socket at the junction orhub 5 of the'arms of the spiderframe 2, and 6 is a screw adapted to run in the socket. This screw is fixed to the seat, which may be raised or lowered thereby in usual manner. The spider-arms are preferably strengthened by webs 7 and finished, as indicated at 8, to receive the screws 3.

9 denotes a strong spring made of steel or other suitable .metal, preferably of wire, in one piece, which spring connects the backstandard 10 to the seat-supporting spider 2. For this purpose each of.the two limbs of the spring is coiled at 11 about a spider-arm, as shown, and extended backwardly in a curve to near the rear edge of the seat, where they are connected by a twist or coiling, as indicated at 12. The two limbs of the spring are continued back of their junction 12 and upwardly together, forming a loop or extension 22. This rear extension 22 is situated in the forked foot or lower end of the back -supporting standard, each limb being separately curved and disposed, as indicated, to receive a bolt at 14 and set-screw at15.

13 denotes a bolt or the like held in the bend 14 of the spring and straddled by the standard-fork, being thereby adapted to support the standard and back. This bolt not only forms a pivot for the back standard or ening the set-screw 15 and tilting the hack on the bolt as a pivot. When adjusted to the desired angle, the back is fixed by tightening the screw, the spring connection with the seat being unaffected.

Obviously a set-screw might be used as the back-standard pivot and the pivot-bolt dispensed with, as indicated in Fig. l, but such construction is not preferred. The tension I of this spring connection is made adjustable by a screw engaging a bar 16, connected to the front ends of the spring near the outer end of the spider-arm opposite the back-standard. This bar receives the spring ends at 17.

18 denotes a set-screw passing through the bar 16 and bearing onthe head of a spiderfastening screw 3. The tension of the spring is varied by manipulatingsaid screw 18.

Some of the advantages of the springsupport are independent of particular means of connecting the same to the standard.

The use of every desired material known to be suitable for the several parts of the con struction is contemplated and also every desired style of back or of seat.

I am aware that coiled springs have been combined with tilting seats and with a tension-regulating screw, and such device is not herein claimed.

Having described my invention, I claim-- 1. The seat and back supports and the spring comprising two members twisted together and formed into a loop whereby it is connected to the back-support, said back support having a forked end to receive the loop,

and a set-screw to compress the fork members upon the loop, substantially as described.

2. The seat and back supporting standard and the spring comprising two members twisted together and formed into a loop whereby it is connected to the back-support, said back-support having a forked end to receive the loop, and a back-supporting pivot passing through the standard and loop, substantially as described.

3. The seat and back supporting standard and the spring comprising two members twisted together and formed into a loop whereby it is connected to the back-support, said back-support having a forked end to receive the loop, and a set screw to compress the fork members upon the loop, and a backsupporting pivot passing through the standard and loop, substantially as described.

4. In a chair,the seat,'the seat-support comprising a spider-frame, the back-support, the spring coiled about arms of the spider and having a vertical rear portion fixed directly to the back-support and constituting the sole connection between the seat and back, a bar to receive the free front'ends of the spring, and means for operating said bar to adjust the tension of the coils, substantially as described.

5. In a chair,the seat,the seat-support comprising a spider-frame, the back-support, a spring coiled about arms of the spider and having a vertical rear portion fixed directly to the back-support and constituting the sole connection between the seat and back, a bar to receive the free front ends of the spring, and a set-screw passing through the bar and bearing on the seat to adjust the tension of the spring-coils, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

SMITH N. MCCLOUD.

lVitnesses:

NELLE G. McCLoUD, L. PIPER.