US1232901A - Sliding caster. - Google Patents

Description

D. B. DISS.

SLIDING CASTER.

APPLICATION man AUG. 7. 1915.

1 232 9U1 o Patented July 10, 1917.

,4 77 ORA/E V ermine ornrcn DANIEL B. 10188, 01F NEWARK, NEW JERSEY, ASSIGNOB T0 UNIVERSAL CASJTER 8t FOUNDRY COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW! JERSEY.

SLIDING CASTER.

il,232,tlll.

Application filed August 7, 1915.

To all whom it may concern:

Be it known that I, DANIEL B. Dies, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Sliding Casters, of which the following is a specification.

My invention relates to casters or supports for furniture and the like, havmg a smooth convex lower surface adapted to slide with the minimum of friction over carpets or other floor coverings. Devices of this Character have heretofore been made with solid disk-shaped heads having convexly curved bottom sliding surfaces and a central stem adapted to be inserted in the legor body of the object to be supported. My improvement provides a sliding caster of this character, in which are combined the advantages of increased lightness, strength, and economy of manufacture. lln accordance with my invention, the sliding caster is formed of a pair of metal disks or shells, pressed or stamped into form, with their peripheries curved upwardly and downwardly, and inwardly, respectively, so that one may be fitted about the other. The bottom shell is provided with the desired convexly curved sliding bearing surface. The end of the stem is passed through a central opening in the upper shell, until a collar or enlargement on the stem contacts the upper shell, when the end of the stem is upset to secure the same firmly to the upper shell. The lower shell is then positioned with its upwardly and inwardly curved edge extending around the curved edge of the upper shell a firm connection between the two members being then effected by spinning. Preferably the upset end of the stem is of sufiicient length to rest in contact with the upper surface of the bottom disk, at the center thereof, thus aiding in transmitting the strain to the central stem. In this case, the stresses set up in the bottom member of the caster by supporting the weight of the object are transmitted in part through the upset end of the stem directly to the latter, and in part through the annular arched edge portlons of the two shells or caster-members. In many instances, however, it is not deemed necessary to prolong the upset end of the stem into contact with the bottom shell, the curved bottom shell, reinforced by the arched edge of the upper shell inclosed within the Specification of Letters Patent.

Patented July to, tort.

Serial No. 44,171.

same, being sufliciently strong. The device may be made attractive in appearance, the upper shell being provided with a slight shoulder against which the bent-over edge of the lower shell abuts, concealing the joint. In order that my invention may be more clearly understood, attention is hereby directed to the accompanying drawings, forming part ofthis application and illustrating certain embodiments of my invention.

In the drawings, Figure 1 represents a front elevation of my improved sliding caster; Fig. 2 is a vertical section, taken on line 2-2 of l, the stem being shown in elevation; and Fig. 3 is a horizontal section taken through the stem on line H in Fig. 1, showing the caster in top plan view. Referring to the drawings, the upper shell 1 is formed of a disk of metal, pressed or stamped to shape, with its periphery curved downwardly and inwardly, as shown at 2, to the edge 3. The bottom shell 4 is similarly formed with a smooth convexly curved bottom sliding surface 5 and an upwardly and inwardly extending curved portion 6 at its periphery, terminating in the edge 7. The upper shell has a central portion 8, which may be an approximately plane surface or slope downwardly slightly toward the edges, between which portion and the arched peripheral portion 2 the metal is bent downwardly, as shown at 9, when the bottom shell is spun about the upper shell, with the peripheral edge 7 of the bottom shell contacting the slight shoulder thus formed.

The stem 10 is preferably formed with the shoulder 11 thereon and a portion 12 of less diameter extending through a central openingin the upper shell. The end portion 12 of the stem is first inserted through the opening in the shell with washer 13 interposed between the latter and shoulder 11, after which the end of the stem is upset as shown at 14, to firmly secure the stem to the upper shell. As stated, the end of the stem may be upset merely for the purpose of securing the stem in position, or it may be formed of suficient len h and bottom surface to form a support 'or the center of the bottom shell. en the stem has been secured in place, the bottom shell is formed around the curved edge of the upper shell and spun mto position as stated, whereby the r til invention illustrated, with a central support 1 inline with the axis of the stem as well.

Having now described my invention, what I claim as new therein and, desire to secure by Letters Patent is as follows A sliding c'aster,comprising bottom and top pressed metalshells, the bottom shell having a smooth sliding bearing surface and an upwardly and outwardly arched edge portion, the top shell having a central diskshaped portion, a downwardly-sloping annular shoulder extending about the same, and a downwardly and outwardly arched edge ortion 'beyond said shoulder, the bot tom 5 ellbeing spun on the top shell with its arched edge portion closely fitting around this 5th day of August, 1915.

the arched edge portion ofthe top shell and its peripheral edge abutting said shoulder, and a ste'm extending through mid upper shell, having an enlargement above the surface of the upper. shell and an u set end extending between the inner sur aces of the upper, and lower shells, and adapted to support the center 01' said lower shell, substantially as set forth.

This specification signed and DANIEL B. DISS',

Witnesses:

ALBERT-B. DIss,

JOHN H. BROEMEL;

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