US280593A

US280593A - Adjustable chair-support

Info

Publication number: US280593A
Authority: US
Publication date: 1883-07-03
Anticipated expiration: 1900-07-03

Description

(No Model.)

-P'atented July 3, 1883.

(NoiKModel.)

Y 2 Sheets-Sheet 2. l W. FARMER.

ADJUSTABLE CHAIR SUPPORT.

Patented July 3, 1883.

1mm c UNITED STATES PATENT QEEICE.

TWILLIAM FARMER, OF VYTHEVILLE, VIRGINIA.

ADJUSTABLE CHAIR-SUPPORT.

SPECIFICATION forming part of Letters Iatent No. 280,593, dated July 3, 1883.

Appncauou mea Mmheo, Issa. (Np monti.)

and other Purposes, of which the following is' a specification, reference being had to the accompanying drawings.

This invention relates to adjustable chairsupports; and it has for its object to provide a device which shall be simple, convenient, light, and portable, and easily applied to ordinary chairs of any kind or construction, which may thereby be elevated and adjusted in the manner and for the purpose which will be hereinafter fully described, and particularly pointed out in the claims.

In thel drawings hereto annexed, Figure-l is a perspectiveview of a chair mounted on my improved elevating and adjusting devices. Fig. 2 is afront view `of the same. Fig. 3 is a perspective 4view of one of the elevating and adjusting `devices detached from the chair. Fig. 4 is a vertical sectional View of the same. Fig. 5 is a horizontal sectional view.

The same letters refer to the same parts in all the figures.

` A in the drawings designates a frame, comprising a clamping collar or band, B, having in one side aradial slit, C, through which atightening-screw, D, passes transversely, connecting the ends of the band or collar, which may thus be clamped upon a rod, E, which may consist of a piece of ordinary gas-pipe, which is thereby adjustable vertically in the said frame or collar. The face Yof the latter is providedwith a semicircular recess, F, at the sides of which two screws, G G, fixed in the frame A, project, as shown. Upon the said screws Y slides a follower, H, having a curved recess, I,

To the lower ends of the vertically-adjustable rods E quarter-curved pipe-joints K are tightly screwed, or otherwise secured, and into the lower or outerends of the said pipe-joints the curved legs L L are screwed. Said legs, which may be made 'of ordinary gaspipe, are capable of being turned in the joints or sockets to any desired position, in which they may be held by set-screws M, working in the sides of the sockets.

N N are brackets having set-screws O O by which they are vertically adjustable upon 4the upper ends of the .rods E, which are securednpon the front legs of the chair. Said brackets serve to support a foot-rest, I), which is thus capable of vertical adjustment.

The operation of this invention will be readd ily understood from the foregoing description, taken in connection with the drawings hereto annexed.

The parts composing my invention are small and compact, and may be readily separated and packed in a valise, or in other convenient form for transportation. The clamps may in a moments time be attached to the lower ends of the legs of 'an ordinary chair, which may thus, by moving the rods E in their respective sockets, be adjusted vertically to any desired extent. The curved legs L may be spread out, so as to form a large and firm base, or they may be turned and adjusted so as to tilt the chair in any desired direction. The foot-rest, likewise, may be adjusted so as to suit the size and position of the patient.

This device is especially useful for traveling dentists, who cannot conveniently carry the regular dentists chair to allV places where they are required to practice theirprofession, and who, as well as their patients, have experienced much inconvenience by the use of ordinary chairs, which are by no Ineans adapted to the various postures which must be assumed during the extraction or treatment of the teeth. The attachment is also useful for barbers, and for other purposes which will suggest themselves.

I claim as my invention and desire to secure by Letters Patent of the United States l. The combination, with clamps adapted to be attached to the lower ends ofthe legs of an ordinary chair, of supporting-rods verti- IOO cally adj nstable in the said clamps7 and curved legs suitably connected to the lower ends ot' said rods7 as set forth.

2. The combination ol'clamps adapted to be attached to thelower ends ofthe legs of an ordinary chair7 supportingiods vertically adjustable in thel said clamps, quarter-curved joints secured to the lowerends of said rods, curved legs adjustable in the said joints7 and set-screws i'orholdiney the said legs in any position to which they may be adjusted7 as set I'orth.

3. The described attachment for chairs, the same consistinfg` ol.' clamping bands olreollars equipped with tightening-sercws, and having concave recesses in their faces, and screws projecting at the sides ot' said recesses7 followers and thnnih-nuts :nljnstable upon said screws,

supporting-rods vertically adjustable in the bands or collars, pipe-joints at the lower ends ot' said rods7 and curved legs adjustable in the said joints7 all combined and operating substantially as set forth.

+L. The combination7 with the described elcvatim;l and adjusting attachment for chairs7 ot' brackets vertically adjustable upon the front, supporting-rods by means of suitable clamps, and a foot-rest supported by the saidl bracle ets, as set forth.

In testimony that I claim the foregoing1 as my own I have hereto atixed my signature in presence ot two witnesses.

X'Vitnesses:

EDWARD G. Siemens, WM. J. lil'r'lnrm.