US125350A

US125350A - Improvement in swiveled chairs

Info

Publication number: US125350A
Authority: US
Publication date: 1872-04-02
Anticipated expiration: 1889-04-02

Description

DANIEL E. TEAL.

Improvement in Swiveled Chairs.

Patented April 2, 1872.

monly employed.

NITED STATES PATENT QFFIGE.

IMPROVEMENT IN SWIVELED CHAIRS.

Specification forming part of Letters Patent No. 125,350, dated April 2, 1872.

To all whom it may concern:

Be it known that I, DANIEL E. TEAL, of New Lisbon, in the county of ()t-sego and in the State of New York, have invented certain new and useful Improvements in Swivel- Ohairs; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing making a part of this specification, in which Figure l is a side elevation of a swivel-chair containing my improvements. Fig. 2 is a ver- .tical central section of the lower portions of the same; and Fig. 3 is a perspective view of the axial bearing of or for the stool.

Letters of like name and kind refer to like parts in each of the figures.

My invention is an improvement in a class of chairs which are so pivoted as to have a horizontally rotary-motion, and which are also capable of a vertical adjustment; and it consists, principally, in a chair capable of a hort zontally rotary means employed for securing a vertical adjustment of its seat, substantially as and for the purposehereinafter specified. It consists, further, in the elevating and swiveling devices, when constructed and combined substantially as and for the purpose hereinafter set forth.

In the annexed drawing, A and A represent three or more legs, secured together at their upper ends by means of ahollow metal sleeve, B, and provided, preferably, with casters (J upon theirlower ends. The legsAare formed of or from cast metal, and, by reason oftheiropeu, trnssed shape, have all necessar strength, while weighing much less than those com- Fitted loosely to or within the sleeve B is a metal pipe, I), having a length equal to about twice the length of said sleeve, and provided at its upper end with an 0utward-projecting flange, d. The upper half of the sleeve Bis recessed out interiorly, so as to receive and contain a spiral-wire spring, E, which encircles the pipe 1), and, bearing against the lower end of the recess b and against the flange d, sustains said pipe in an elevated position, except when depressed purposely. A set-screw, l", passing horizontally inward through the lower portion of the motion independent of the' sleeve B, has its inner end in contact with the pipe D, and confines the latter in position when adjusted thereto. A stud or pin, G, secured to and extending vertically downward from the center of the chair-seat H, corresponds to and fits within the upper end of the pipe D, and forms an axial bearing for and upon which said sea-t revolves.

The device is now complete and operates in the following manner: When it is desired to adjust the seat to height the set-screw is loosened and said seat permitted to raise by the force of the spiral spring, or, if too high, is pressed downward until in position, after which, by screwing inward the set-screw, the parts will be securely locked in place.

The special advantages secured by this construction of a chair are that, while adjustable to height with equal ease and in the same time as the ordinary screw-swivel chair, the movements of my chair upon or over the floor do not afl'ect its vertical position, while in the ordinary chair named such movements cause the base or stool to slowly rotate in such direction as to gradually lower the seat to its lowest point.

In addition to the above, the cost of my device is materially less than that of said screwswivel chair.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1s- 1. A vertically-adjustable chair, capable of a horizontally rotary motion independent of the means employed for securing said vertical adjustment of its seat, substantially as and for the purpose specified.

2. The hollow sleeve B, provided with the recess 1) and set-screw F, the pipe D provided with the flange d, the spring E, and the axial bearing Gr, when constructed and combined substantially as and for the purpose shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this 30th day of January, 1872.

DANIEL E. TEAL. Witnesses:

A. G. MOORE, JASON D. (loom.