US1333895A - Caster - Google Patents

Description

G. BUTTS.

CASTER.

APPLICATION FlLED SEPT. l1, 1919.

Patented Mar. 16, 1920.

SuM/swg GEORGE BOTTS, OF BELLAIRE, OHIO.

CASTER.

Specification of Letters Patent.

Patented Mar. 16, 1920.

Application led September 11, 1919. Serial No. 323,077.

' 70 all w/wm it may concern.'

Be it known that I, GEORGE BoTTs, a citizen of the United Stat-es, residing at Bellaire, in the county of Belmont and State of Ohio, have invented certain new and useful Improvements in Casters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as 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 the letters and figures of reference marked thereon, which form a part of this specification. A

This invention relates to new and useful improvements in casters and consists of a simple and efhcient device of this character, which has for its object the provision of a ball bearing furniture caster so constructed as to permit its ready attachment to the leg of any article of furniture upon which it may be desired to use the same, and when adjusted in position will permit ot said article of furniture to be easily and smoothly7 moved, without in any way marring the iioor or covering therefor.

My invention is illustrated in the accompanying drawings which, with the numerals of reference marked thereon form a part of this application, and inwhich:

Figure l is a central vertical sectional view taken through the lower end of a leg of a chair or other article of furniture.

\Fig. 2 is an edge view of the device detached, and

F ig. 3 is a top plan view showing the ball retaining chamber at the lower end of the caster body.

Reference now being had'to the details of the drawing by numerals:

l designates the body portion of the caster made in the form of a single casting and provided at its lower end with a circular chamber 3, of such a diameter as to permit the metallic ball 2 to be inserted, the diameter of the opening being slightly less than the diameter of the ball 2, thus requiring a slight pressure to force `the ball to its seat within the chamber 3, and the retention of the ball is insured by the overlapping peripheral edge of the opening, as will be readily understood.

It will be noted that the inner end of the ball `retaining chamber 3 is conical and provided with circular guide ways 4, which latter are provided with a series of small steel balls 5, upon the surface of which the ball 2 has a bearing when in place.

6 designates a metallic rod screw threaded at its lower end to engage the screw threaded opening 6 formed in the upper :tace of said body portion, its upper portion being pro-V vided with spring arms 7,'7, which arms are Dolted at their lower ends to the opposite sides of said chamber 3, the free ends of the rod being extended and having their eXtreme ends bent slightly outward, as at 8.

In assembling the parts, the body portion l of the caster is inverted, the small steel balls 5 are placed within the ball chamber 3. The large ball 2 is then iitted within the chamber and forced to its seat with a sharp blow, after which the caster is reversed, and the plate or pan 9, which may be of square er circular outline, having a central opening corresponding with the opening in the body portion of the caster, is placed upon the up- Y per end of the body portion 1. VThe screw threaded end 6 of the member 6 is passed downward into engagement with the screw threaded opening l0 in the portion l. The caster is then placed in position upon the end of the leg of a chair, etc., the spring arms 7 being inserted within the opening in said chair leg, etc., which is provided for their reception.

It will be understood that while I have shown a caster circular in cross section, that the same could be rectangular or of other form, adapted to the particular shape of the article to which same is applied.

lflhat I claim to be new is:

A caster comprising a block with a circular outlined recess in the bottom thereof, the walls of the recess beine slightly flexible and adapted to yield as the ball.. bearings are sprung into the recess, a flanged cup fitted to the upper end of said block, said cup threaded apertures, a screw fitted in said apertures, a portion oit the screw above the surface of the cup being angular in cross section, and resilient angled arms fastened to opposite faces or the angular portion of said threaded screw, and adapted to engage the inner wall of the bore of a leg designed to rest in said cup.

In testimony whereof I hereunto affix my signature.

GEORGE BOTTS.

and block having registering' andl

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