US91086A - Improved furniture-caster - Google Patents

Description

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"STEPHEN CHANDLER, or NEW YORK, N. Y.

\ Letters Patent No. 91,086, dated June 8, 1869.

IMPROVED IEURNITU'RVE-GASTER.

The Schedule referred to iu these Letters Patent and making part of the saine.

To all whom it may concern:

Be it known that I, STEPHEN CHANDLER, of the city, county, and State of New York, have invented a new and useful Improvement in Casters for Furniture and other articles; andI do hereby declare the following to be afull, clear, vand exact description thereof, which will enable those skilled in the art to .make and use the saine, reference being had to the accompanying drawing, forming part of this specification, in which drawing- ,v Figure l is a longitudinal Ysection of my caster.

Figure 2 is an inverted plan view. This invention relates to casters for furniture and otherportable articles, and the same consists in the use of free spherical caster-roller, surrounded by antifriction wheels, arranged in pairs, or in triplets, if desired, and surmounted by a free upper spherical rollwhich is arranged and placed loosely in a socket, B,

formed to receive it in the' underside of the casterv head O.

The central part of said socket B is intersected by a smaller upper socket, D, formed in said caster-head O, and in the socket D, I place a supplementary spherical roller, G.

lhe roller C is arranged in such a manner above the main caster-roller A, that when the parts are at rest, the same vertical line will pass through the centres of both the rollers A C.

The upper side of the socket D Ais made convex, so that the roller C will come in contact therewith at only a single point` y The caster-roller A is held in its socket, so that it will not fall out when the furniture is lifted from the floor, by means of spring-arms G, which are in this example only three in number, and which project downwards from the caster-head, as shown in the drawing, being arranged intermediate of several, 'or

ets E, and their enclosed wheels or rollers F, are arranged concentrically about the caster-roller A, the several pairs being at about equal distances apart.

The wheels orrollers F fit loosely upon their shafts K, so as to allow the wheels to have a little side -p-ay thereon,in order that when the caster-roller is pushed against them, they may adjust themselves thereto, and facilitate the easy movements of the parts. I have shown, in lig. l, this method of fitting the wheels or rollers F ou their shafts, the holes through them, 'to-receive the shafts, being enlarged, as is represented in that figure.

The several pairs of anti-friction wheels or rollers F, perform no part of the duty of retaining the casterroller in its place, when the caster is raised above the door; (this duty is wholly performed by the springanus G but the duty of the said anti-friction wheels or rollers, is merely to form anti-friction surfaces, which will facilitate the revolution of the caster-roller about its own centre, when the furniture to which it is applied, is pushed against, and on'this account I have placed the shafts K, on which the wheels or rollers F turn, above the horizontal line which goes through the centre of the caster-roller.

The letter H designates the shank of the castel', which is tobe received in a suitable socket formed in the part of the furniture where the caster is to be applied. I form upon said shank, au annular groove, I, and in said groove place on a loose collar, J,-'wh0se diameter is a little greater than the diameter of that part of the shank where the collar is situated. The

collar is prevented from leaving said groove by means of the shoulders at the lends of the grooves, but it is A free to turn therein.

I prefer to make this collar with a corrugated surface, and one mode of making it is to coil a piece of eter of the adjacent parts of the shank. A collar so formed has some elasticity, and when the shank is forced into its receptacle, the threads or corrugations ofthe collar will become united, or will stick in the receptacle, and by that moans hold the caster firmly in place, while the shank will be always free to turn in the collar. Should the shank fit too loosely in its socket or receptacle, or wear loose therein, it can be tightened by winding a thread or a fine wire around the collar between its threads or coils, until its diameter is increased to the proper size.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is

lh'e spherical caster-roller A, in combination with. the spring-arms G, and the antilfriction wheels F, when the latter are arranged in pairs with their axes above the centre of the caster-roller, substantially as described.

STEPHEN CHANDLER. Witnesses:

W. HAUFF, J. VAN SANTvooRD.

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