US666650A - Trunk-caster. - Google Patents

Description

i' No. 666,565. l y APatented 1an. 29, Ism.

G. J. DAWSON.

TRUNK CAST'E-R. 'mppicmon med Aug. 25, 1900.)

UNITED; STATES PATENT Ormes.

GEORGE JANES DAVISON, OF RICHMOND, VIRGINIA, ASSIGNOR, BY MESNE ASSIGNMENTS, OF ONE-HALF TO JOHN T. BUTLER AND JOHN M. WARREN,

OF SAME PLACE.

TRUNK-CASTER.

SPECIFICATION forming partof Letters Patent No. 666,650, dated January 29, 1901.

Application filed August 25, 1900. Serial No. 28,064. (N model.)

To @ZZ whom it Wuty concern.:

Be it known that I, GEORGE JANES DA- vIsoN, a citizen of the United States, residing at Richmond, county of Henrico, State of Virginia, have invented certain new and useful Improvementsin Trunk-Casters, of which the following is a full, clear, and exact description, reference being had therein to the accompanying drawings, in .which- 1o Figure l is a vertical sectional view of my improved `device applied to a bottom strip of a trunk; Fig. 2, a side elevation of the caster; Fig. 3, a perspective view thereof, and Fig. 4 a detail sectional view of the cupshaped body inverted.

The object of the invention is to provide an antifriction-ball caster especially adapted for trunks which shall be extremely simple, durable, and inexpensive and be capable of 2o easy application to the bottom strip of a trunk,

as more fully set forth.

The invention consists of an inverted cylindrical cup-shaped body ct, forged or cast of a single piece of metal and havingits closed z 5 top b made convex on its inner face and having an external stop-ilange c formed around its lower open end, the extreme lower edge or rim of the cup being tapered oftl to form a thin edge d, which is capable of being bent 3o inward toward a large floor bearing-ball e to confine the same in the cup. This floor-ball bears upon a smaller ball f, confined between it and the top part of the cup and resting in a central recess in said top part. On the ex- 3 5 terior of the cup and extending the full length thereof and connecting with flange c is a series of longitudinal sharpened ribs g.

In assembling the parts the cup is inverted and the smaller ball is first dropped into its 4o recess. Then the large floor-ball is dropped in on the small ball, and then the tapered flange d is bent inward close to or lightly in contact with the ball allaround. The device is then ready for application to a trunk. In

the bottom strip of the trunk a round hole is bored approximately equal in diameter to the diameter of the cup, and into this hole the cup is driven, closed end first, until its flange c comes against the under side of the strip.

5o In driving the cup home the knife-like ribs g out into the wood at several points around the hole, and thereby securely bind the cup in the hole and prevent its turning therein or its ready withdrawal therefrom. In inserting the cup into the cavity the blows necessary to force it to place may be delivered directly on the floor-ball, (or on an intermediate cushioningblock held in the hand of the work mam) since this ball and the smaller ball are to be made of steel, and the top part of 6o the cup is made integral with the cylindrical casing and is thereby capable of withstanding the strain incident to driving the device to place. The making of the inner side of the top part convex and providing it with a central ball-recess not only strengthens that part, and thereby renders it sufficientlyy strong to take the strain (which will sometimes be quite severe) incident to driving the cup into place and to the rough handling trunks are fre- 7o quently subjected to, but also facilitates the assembling of the parts, in that it insures the proper positioning of the smaller ball, whereby delay in putting the parts together will be avoided. Thus employing a single central ball in the convex top part insures the impact and strain brought on the balls being transmitted directly throughthe centers ot' the balls to the arched top part, whereby injury to the shell, which is desirably made 8o lighter in weight, is avoided.

To further secure the device from accidental removal, I form on the upper end of each of the cutting-ribs an extension h, which is pointed and slightly beveled or dared outward 8 5 away from the cup, so that when the cup is` driven .into its cavity these lingers or points will come in contact with the usual metal plate or strip on the bottom of the trunk and be clenched, as shown in Fig. l. 9o

It will be observed that my device is extremely simple in construction, is capable of withstanding the roughest handling without derangement or detachment, and may be appiled with ease and without the use of screws or other attaching devices. The special feature of utility lies in the fact that it is so constructed as to not only withstand the comparatively great strains` and blows trunk-casters are subjected to in practice, but also the roo severe blows necessary to drive it tightly to place in the bottom strip.

It is evident that this caster may also be or more cutting-ribs on its exterior having employed for articles of furniture and other elenohing extensions ou their upper extremiapparatus Without departing from the inventies.

vention in the least. In testimony whereof I hereunto affix my 5 Having thus described my invention, What signature, in the presence of two Witnesses, 15

I claim isthis 24th day of August, 1900.

A Castel" consisting of a cup-shaped body GEORGE JANES DAVISON. part, closed at its upper end and open at its Witnesses: A lower end and inelosinga Hoor-ball in its open W. P. TALIAFERRA, 1o end, said body part being provided With one A. L. HAYNES.

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