US381759A - Trunk or furniture caster - Google Patents

Description

(NovMoael.)

J. P. GARMIGHAEL.

TRUNK 0R FURNITURE GASTRR.

Patented Apr. 24, 1888.

NITED STATES PATENT OFFICE.

. JOHN P. OARMICHAEL, OF MILWAUKEE, WISCONSIN.

TRUNK OR FURNITURE CASTER.

SPECIFICATION forming part of Letters Patent No. 381,759, dated April 24, 1889.

Application lecl July 23, 1885. Serial No.172,387. (No model.) -A V To LZZ whom it may concern.-

Be it known that I, JOHN P. OARMIOHAEL, of Milwaukee, in the county of Milwaukee,and in the State of Wisconsin, have invented certain new and useful Improvements in Trunk or Furniture Casters; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to trunk or furniture In the drawings, Figure l is-a vertical section through the center of my caster. Fig. 2 is a plan view of the bottom plate. Fig. 3 is a perspective of the bottom plate, and Fig. 4. is aperspective view of the baseplate inverted.

A is the base-plate, which is ofinverted-cup shape, and B is the bottom plate. This latter is formed with a raised portion, b, having a hub, b', that terminates in a spindle, c, and alsohas bearinglugs c d e, while other bearing-lngs,f

f', extend up from the base-plate adjacent to lugs d and e, respectively. The trunnions of each of the anti-friction wheels g g g are sup ported in notches in each pair oflugs, and these wheels are designed to receive the bottoni of the base-plate, while spindle o projects up through said base-plate and is secured thereon by a suitable head, as shown, for instance, in Fig. 1.

O is the main roller-wheel, which is designed for contact with the floor, and the axis of this wheel is under a point about midway between the center of the wheel gand the vertical center of spindle c, so that the weight carried by the caster will be evenly balanced between the spindle and this roller, while the rollers gwill prevent the spindle from cramping in the baseplate when the weight comes on the caster on the opposite side ofthe spindle from the wheel g. Therefore there are no binding-points in my caster, and cramping is impossible. By my construction the chief weight or pressure comes on the wheels g y', which are nested together about the pivotal point c, and hence the wheel g is largely relieved from said weight or pressure by moving in a circle which is outside of the line of rotation of the said wheels gg, and therefore is enabled to eXert nearly its whole force j ust where needed-that is, adjacent to the roller O-and this also relieves the wear and tear on the bearing or pivotal point c.

My caster is especially useful with very heavy articles of furniture-such as pianos, heavy trunks, sideboards, and thelike-and also very useful for trucks. I have shown two wheels nested about the pivotal point, making three anti-friction wheels in all; but I may use more or less, keepingin mind that the wheel nearest the roller O is to move in a line outside of the line of mot-ion of the other wheel or wheels.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a caster, a bottom plate having a spindle, with an anti-friction wheel or wheels sustained adjacent thereto, and another antifriction wheel moving in a circle outside the line of motion of the first-named wheel or wheels, in combination with a roller journaled beneath a point between the lastnamed antifriction wheel and the spindle, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in thc county of Milwaukee and State of Wisconsin, in the presence of two witnesses.

JOHN I?. OARMIOHAEL.

Witnesses:

H. G. UNDERwooD, G. A. PLATZ.

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