US70490A - Edward s - Google Patents

Description

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EDWARD S. WINCHESTER, OF BOSTON, MASSACHUSETTS.

Letters Patent No. 70,490, dated .November 5, 1867. i

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TO ALL WHOM 'IT-MAY CONCERN: I

Be it known that I, EDWARD S. WINCHESTER, of Boston, inthe county of Sudolk, and State of Massachusetts, have invented a new and improved Tip for the Feet of Chair-Legs; and I do hereby declarethat the following, taken in connection with the drawings, which accompany and form part of this specification, is a description of my invention sufficient to enable those skilled in the nrt to practise it. l

My invention consists of the rubber tip, of the form herein shown and described, and which is peculiarly adapted,by its form and disposition of material, for use upon the legs of chairs, to prevent noise, slipping upon floors, and injury of carpets, Hoor-cloths, and iinors, by the movement of or tipping of chairs.

My tip'is made of elastic vulcanized rubber, with a straight or conical cavity, corresponding to the form of the end of the chair-leg upon which it is to be placed, the material about this ferrule increasing in thickness from its centre to its open end A, also increased from its centre B, to the closed end or base thereof C, on which the foot of the chair rests, and from which base the material is formed into a thick cushion, of convex outline, ou which the superineumbent weight rests. l

The increase of thickness from the top of the tip downward around the leg is necessary to reinforce and support the cushion'under the foot of the chair-leg, and to preventthe 'tip from turning or becoming distorted in position upon the leg when subject to weight and movement on the chair, as would be the case if the material supporting the cushion were of uniform-thickness, except when made very thick, and uniformly so, in which instance the tip-would be clumsy, unsightly, and expensive, from unnecessary material. Thethickn-ess of the cushion acts as a spring, relieving and modifying all sudden jars, and the convexity ofthe outline of the cushion permits tilting of the chair.

The length of the tubular part surrounding the chair-leg and the thickness of the cushion, are best made in the proportion shown in the drawing, where the length ot' the fit upon the leg, the elasticity of the rubber,l

andthe disposition made of the material, render accidental displacement of thetip from the chair-leg impossible. The cross-section of the tip may be round, Oval, or polygonal, as may be called for by the cross-section of the chair-leg on which the tip is to be placed.

I claim as my inventionl The India-rubber tip constructed as described, that i's, formed as a ferrule, to be placed upon the foot of the chair, vthe ferrule increasing in-thickness from its centre B to its open end A; also increased from its centre B to the closed end or base thereof, 011 which the foot of the chair rests. i

In witness whereof I have hereunto set my hand this twentieth day of January, A. D. 1862.

EDWARD S. WINCHESTER.

Witnesses:

J. B. CROSBY, J. FRANK NEWMAN.

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