US1016654A - Caster. - Google Patents

Description

r. E. THOMPSON.

OASTER.

APPLICATION FILED novvn, 1911.

1,016,654, 1 Patented Feb.6, 1912.

COLUMBIA PMNOGlAPl-I $0., WASHINGTON, n. c.

UNITED sT rns PATENT OFFICE.

FRANK E. THOMPSON, OF COREY, PENNSYLVANIA, ASSIGNOR TO COREY CAS'I'OR COM- PANY, 0F COREY, PENNSYLVANIA, A COR-PORUATLION OF PENNSYLVANIA".

Application filed November 11, 1911.

Specification of Letters Patent.

Patented Feb. 6, 1912.

Serial No. 659,675.

To all whom it may concern:

Be it known that I, FRANK E. THOMPSON, a citizen of the United States, residing at Corry, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Casters, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in casters and particularly to improvements in casters provided with pintle-retaining means and adapted for use in metallic bedsteads the legs of which are tubular; and an object of this invention is to simplify and strengthen the construction of the pintleretaining means of such casters to reduce the cost of manufacture of the same and to increase the durability and etliciency thereof.

In the drawings illustrating the principle of this invention and the best mode now known to me of applying that principle, Figure 1 shows my new caster in elevation; Fig. 2 is a section on the line AA of Fig. 1; Fig. 3 is a plan view of my new caster; Fig. 4: is a section on the line BB of Fig. 3, the caster-wheel being shown omitted; Fig. 5 is a view looking in the direction of the arrow X in Fig. 1, the caster-wheel be ing shown omitted; Figs. 6 and 7 are details showing the pintle-retaining centeringplates; Fig. 8 is a view similar to Fig. i and shows a modification in which the pintle is detachably retained; and Fig. 9 is a section on the line G-C of Fig. 8.

The caster proper (that is, apart from the pintle-retaining means) is of the kind com monly found in the type of casters known as point bearing casters and consists of the usual caster-wheel a, jaws b, yoke 0 and pintle cl, the upper end of the latter being formed with a groove cl and apointed upper end or pivot-point d. The base-plate e is formed with the usual central hole 6 through which passes the pintle d. Upon the base-plate 6 there are mounted two pintle-retaining centering-plates f, g each of which is formed with a pair of lugs h at its lower end and with a centrally-disposed pintle receiving channel 1'. In the top of the plate 9 there is formed a notch or recess j and from the top of the central channel 2' in the plate f there extends a recess or notch 75. The plates 7', g are interlocked with each other by forcing the top of the plate 9 into the notch 70, the topof the plate f being thereby made to enter the notch j in the top of the plate 9. Thus, the plates f, g are securely and firmly interlocked and a strong structure produced. These plates f, g are arranged diametrically of the baseplate e and are fastened therein by passing the lugs it through slots in the base-plate e and then upsetting the lugs. In the top of the channels 2' there is mounted a circular or disk-like bearing-plate m against which bears the upper pointed or pivot end 0 of the pintle (Z. The disk obtained by punching the central hole 6 in the base-plate 6 may be used as the bearing-plate m. The pintle (Z is retained in the channel i by forcing out the metal of the walls of the latter in one of the centering plates, in the form of lugs a into the groove (Z in the upper end of the pintle. The pintle-retaining centering-plate f is formed at its top with an up wardly-eXtending lug 0 which passes through a central hole formed in the top or base of the inverted U-shaped leaf-spring p and which is upset to fasten the latter to the plate f. The legs 39 of the spring p are adapted to press outwardly in the usual manner against the inner face or wall of the tubular leg 9 of the bedstead and thereby to retain the caster detachably within" the same.

WVhen it is desired to hold the pintle detachably in the centering-plates, one of the latter, as g, is formed with a recess 1" which extends from the central channel 2' and in which is sprung a curved, leaf-spring s. The latter bears yieldinglyagainst the wall or bottom of the groove cl and thereby retains the pintle detachably within the centering-plate.

It is to be observed thatthe pintle (Z is firmly supported by being given a bearing throughout practically the whole length of the edge portions along the channels 2'.

To strengthen the base-plate c, it is formed with radial ribs 6; but this stiltening or strengthening of the base-plate is regarded by me as a well-known mechanical expedient.

To make easy and smooth the entrance of the retaining-plate into the tubular leg 9,

' the lateral edges of the centering-plates are slightly tapered, as is best shown in Fig. 4:.

I claim:

1. A pintle-retainer for casters having a base-plate; a centering-plate the bottom edge of which extends centrally across said base-plate and has a bearing upon the pintle; and spring-arms carried by said centering-plate and arrangedto engage the inner wall of the tubular. leg of the bed.

-2. A pintle-retainer for casters comprising a base-plate; a pair of centering-plates the bottom edges of which extend centrally across said base-plate and one of which has a; bearing upon the pintle; and spring-arms carried by one of said centering-plates and arranged to engage the inner wall'of the tubular leg of the bed.

3. A pintle-retainer for casters having a base-plate formed with a hole for the passage of the pintle'; a centering-plate the bottom edge of which extends centrally across said base-plate and is formed with a recess which lies above the hole in the baseplate; and spring-arms carried by said centering-plate and arranged to engage the inner wall of the tubular leg of the bed; said centering-plate having a bearing upon the pintle.

4. A pintle-retainer for casters comprising a base-plate formed with a hole for the passage of the pintle; a pair of centeringplates the bottom edges of which extend hand at Corry,

centrally across said base-plate and are' gage the tubular wall. of the leg of the bed.

A pintle-retainer for casters comprising a base-plate; a pairof centering-plates the bottom edges of which extend centrally across said base-plate and are interlocked and one of which has a bearing upon the pintle; and spring-arms carried by one of said centering-plates and arranged to engage the inner wall of the tubular leg of the bed and to work in recesses of which said centering-plates form walls.

, 6. A pintle-retainer for casters having a base-plate; a centering-plate the bottom edge of which extends centrally across said base-plate and which has a bearing upon the pintle and is formed with means for re taining the latter; and spring-arms carried by said centering-plates and arranged to engage the inner wall of the tubular leg of the bed.

In witness whereof I hereunto set my Pennsylvania, this sixth day 01 November, 1911, in the presence of the two undersigned witnesses.

FRANK E. THOMPSON. lVitnesses R0131. J. OSBORNE, J. R. CALKINS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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