US225160A

US225160A - Rotary chair

Info

Publication number: US225160A
Authority: US
Publication date: 1880-03-02
Anticipated expiration: 1897-03-02

Description

A. H. ORDWAY. Rqtary-Ghair.

No. 225,160. Patented Mar. 2,1880.

minekse A '7 Inventor: l 7%M fi4MW NPBERS. PHOTCHJTHOGQAPHER, WASHINGTON. DC.

UNITED STATES PATENT OFFICE.

. ALBERT H ORDWAY, OF GROVELAND, ASSIGNOR TO LOUIS E. HASTINGS,

OF HAVERHILL, MASSACHUSETTS.

ROTARY CHAIR.

SPECIFICATION forming part of Letters Patent No. 225,160, dated March 2, 1880.

' Application filed May '23, 1879.

To all whom it may concern Be it known that I, ALBERT H. ORDWAY, of Groveland, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Rotary Chairs; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention relates to. improvements in I 5 spring chairs; and this my present invention is an improvement on my former application, filed March 17,1879, and allowed April 26, 1879; and it consists of devices by which my previous invention is adapted to turn or swing around a central base or support, so as to produce a rocking rotary chair. as will hereinafter be more fully shown and described.

The invention is carried out as follows: From the seat project downward a pair of frames, one on the right and the other on the left side of the seat. To the end of each such frame is secured an upward-projecting flexible link or spring secured in their upper ends to a lateral bar or plate provided with a screw- 0 shaft or pivot midway between its ends, that is free to swing around its axis within a screw-threaded or perforated hub forming a part of an ordinary central base or support, by which arrangement I support the rotary 3 5 seat on the flexible links or springs in such a manner as to produce a rocking motion on a pair of fulcra located below the hub of the base around which the seat turns, and thus I obtain a more easy, gentle, and pleasant rock- 0 ing motion as compared with rotary rockingchairs in which the rocking motion is produced by suspending the seat on fulcra located above the hub of the stationary base.

On the accompanying drawings, Figure l represents a side elevation of my improved rotary rocking-chair. Fig. 2 represents a central longitudinal section on the line A B, (show n in Fig. 1,) and Fig. 3 represents a plan view of my improved chair with the seat thereof removed.

Similar letters refer to similar parts whereverthey occur on the different parts of the drawings.

a represents the seat of an ordinary chair, and b is its back, as usual. 0 c are the downward-projecting frames, to the lower ends of which the flexible links or springs d d are secured, as shown. The frames 0 0 may be formed of one or two pieces on each side, or made as independent pieces from the seat and back of the chair, as shown in the drawings, or as forming a continuation of the back and the ordinary arm-rests or side pieces, without de parting from the spirit of my invention. 0 is the lateral bar or plate, to the outer ends of which the upper ends of the flexible 'links or springs cl d are secured, as shown. f is ascrewshaft secured to the middle of the plate or bar 6, as shown, which shaft is free to turn within the screw-threaded hub g, that forms the cen- 7o tral part of the stationary base or support 9, as shown.

In case it is not required to lower and elevate the chair, but simply to turn it around, a plain bolt or pivot may be substituted for the screw-shaft f without departing from the gist of the invention.

It will be observed that the lower ends of the frames 0 c and links or springs 61 d are located below the central hub, g, so as to obtain an easy and long rocking motion of the seat, as described.

h h are stops on the seat a, that come in contact with the bare when the chair is rocked to its extreme forward or rear positions. 8

Having thus fully described the nature and operation of my invention, I wish to secure by Letters Patent and claim- In a rotary rocking-chair, the seat a, with its stops h h, downward-projecting frames 0 0, 0 links or springs 61 d, rotary bar 6, pivot or screw f, and base or support 9 g, as herein described.

In testimony that I claim the foregoing as my own invention I have affixed my signature 5 in presence of two witnesses.

ALBERT H. ORDWAY.