USRE11761E - Bearing for spindles - Google Patents

Description

Reissued luly 25, |899.

J. KILBURN.

BEARlNG F08 SPINDLES.

(Application led Feb. 1, 1899.)

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w w 1L UNITED STATES .TOIlN KILBURN, OF BELMON", MASSACHUSETTS.

-BEARING FOR SPINDLES.

SPECIFICATION forming' part of Reissued Letters Patent No. 1 1,761, dated .Tilly 25,' 1899. OriginalvNo, 590,314, dated September 21, 1897. Application for reissue iiled February 1, 1899. 'Serial No. 704,206.

tion, such as will enable others skilled in the art to which it appertains to make and use the same.

As spindles of the self-centering or top type are commonly mounted it is of the greatest importance that the bolster or tubular support within which the spindle rotates should be freely movable to allow the spindle to nd its true center of rotation under anA unbalanced load and that the bolster should at the same time be restrained from rotation with the spindle.

Various devices have heretofore been vproposed to secure the results above suggested; but such devices, in so far as I am informed of the art, have been found to be objectionable in that they impede the operation of the spindle or are too sensitive and liable to get out of repair; and the principal object of the present invention is to provide a simple and durable'device to be substituted therefor.

Another object of the present invention is to provide an improved means for adjusting the step or bearing-point of the bottom ofthe spindle to raise the spindle in the bolster to prevent the pintle ot' the spindle, which commonly tapers toward its lower end, from binding upon the walls of the bolsterl as the lower end of the spindle wears oif or into the step. .f To the aboveends the present invention consists of the devices and combinations ofdevices hereinafter more particularly set forth in this specification and pointed out in the claims.

The present invention is illustrated in the y.

accompanying drawings, in which- Figure 1 is a vertical section through a spindle-snpport embodying the same, showing the spindlein elevation. Fig. Qwis aifveiticalfsec-A tion through the lower portion'of the bolstercase, parts appearing in elevation, showing a modified form of the present invention.

Figs. 3 and 4 are similar views illustrating other modifications.

In the drawings, A represents the spindle, having the usual tapered pintle a, B its whirl, C the bolster, conveniently surrounded by the-usual wicking or other elastic packing c, D the bolster-case, and E the spindle-rail, all of which parts, except as hereinafter specied, may be and v,conveniently are of any usual or convenient construction and in themselves form no essential feature'of the present invention.

II represents the rest or bearing for the lower end of the spindle, commonly termed the step y I have shown in the drawings two forms of connections for the step and bolster, in one of which the step H is inserted with a tight driving t in the bottom 'of the bolster C, (see Figs. 1, 2, and 3,) an arrangement to be hereinafter, referred to, and in the'other the step IVI' is threaded and screwed into threaded bearingsin'the bottom of bolster C, a checknut C being provided to lock. the step H in the required position. A

In accordance with the present invention the step H is supported on a pintle L, which rests upon a suitable support and is free to tip laterally in afll directions.

As shown in the drawings, the pintle L is circular in section and slightly less in diameter than the bore of the bolster-case D, so that its lateral movement is limited by contact therewith; but I desire to say that while I 'prefer to make the pintle L of substantially the form shown, 4onaccount of the strength and simplicity of the arrangement, I do not wish to limit my invention thereto, as the pintle L may be varied lin form and relative size and other means provided to limit its lateral movement without any departure from the present invention.

The 'pintle L' rests upon a Vsuitable support, preferably the base of the 'bolster-case D,jandt11e base Z of said pintle L is shaped to ,allow the pintle-to tip freely, as hereinbeforestated, thebase Las shown in the drawings, beingconical in'` shape. l

The step II (or H) is loosely connected wtih the pintle L either by a tongue p, projected therefrom and engaging a recess 1J' upon the IOO pintle L, (see Figs. l, 2, and 4,) or by a reverse arrangement, in which the tongue p2 is formed upon the pintle L and 't-he recess p3 in the step H, (see Fig. 3,) or by other suitable means which will not interfere with the free lateral movement ofthe pintle.

To restrain the bolster C from rotation, I prefer to restrain the pintle L-by its connection with the bolster-case and the bolster C by its connection with the pintle L.

I have shown in the drawings two methods of restraining the pintle L from rotation, one by means of the pins Z', driven through the walls of the bolster-case D (see Figs. l, 3, and 4) and engaging vertical slots Z2 in the pintle L, and the other by means ot the polygonal tongue Z3, projected from the pintle L and en-A gaging a correspond i'ngly-shaped recess Z1 in the base of the bolster-case D; It is evident, however, that other methods of restraining the pintle L may be used without any departure from the essential features of the present invention.

To restrain the bolster C from rotation with reference to the pintle, the tongue p (or p2) and the recess p (or pi) are formed of a similar shape in section, the recess p (or-193) being slightly larger in section, so, that the tongue p `(or p2) by its engagement therewith restrains the step II, and hence-the bolster c, from rotation without interfering with the free lateral movement of the pintle L or bolster C.'

VIt will be noted that in the form of my invention shown in Figs. 1, 2, and 3 of the drawings, in which thedriving-step His supported upon the pintle L, the pin-tle L forms a firm support for the step I-I, capable of withstanding the shock of a blow on the bolster suicient to drive the step into the bolster, so that the step H can be adjusted within the'bolster C without removing the bolster from the case, afeature which I deem of great import-ance as greatly facilitating the adjustment of the bolster and step to secure the proper position of the spindle in thebolster.

Having thus described 'm y invention and its` mode of operation, I claim as novel and desire to secure by Letters Patent of the United States- 1. In a spindle-support the combination with a bolster, of a step held by'a driving fit within the bolster, and a loosely-held pintle supporting the step, substantially as described.

E?. In a spindle-support the combination with a bolster, of a step vmovable along the bolster, a looselyheld pintle supporting the step free to tip laterally in all directions, and

a'loosefconnection between the step and pintle, substantially as described.

3. In a spindle-support the combination with a spindle having a tapered pintle and a bolster having a tapered bearing, of a step held by a driving fit within the bolster, and a support for the step within the bolster-case, formed and arranged to support the step while the bolsteris driven on stantially as described.

4. In a spindle-support the combination with the bolster-case and bolster, of a step carried by the bolster, a loosely-held pintle free to tip laterally in all directions supporting the step, connections between the pintle and bolster-case and'the pintle and step whereby the bolster is restrained from rotation, substantially as described.

5. In a spindle-support, the combination with the bolster' of a loosely-held pintle supporting the same and free to tip laterally in all directions, and means for restrainingthe pintle from rotation substantially as described.

6. In a spindle-support, the combination with the `bolster-case and the bolster, of a loosely-held pintle supporting the bolster and free to tip laterally in all directions, said pintle being provided with a body portion litted loosely to the bore of the bolster-case and ar` ranged to limit the lateral movement of the pintleby contact with the bolster-case, substantially as described.

7. In a spindlesupport', tlie-combination with the bolster and a step movable along the bolster, of a pintle free to tip laterally in all directions supporting the step, and a coperating tongue and recess upon thestep and pintle, whereby the step is held in position upon the pintle without interfering with the lateral movement of the pintle, substantially as described.

S. In -a spindle-support the combination with the bolster-'case and bolster, of a step, a pintle supporting the step, engaging polygonal tongues and recesses upon the step, pintle and bolster-case, substantially as described.

9. In a spindle-support, the combination with a bolster, of a step within the bolster movable longitudinally along the bolster, and a pintle free to tip in all directions supporting the step, substantially as described.

1U. In a spindle-support, the combination with a bolster, of a step movable longitudinally within the bolster, and a pintle supporting the step and restraining it from rotation, substantially as described.

11. In a spindle-support, the combination witha bolster having a step fitted Wit-hin the same, of a loosely-held pintle supporting the step, and free to tip laterally in all directions, substantially as described.

In testimony in presenee of two witnesses.

JOHN KILI'URN.

Witnesses:

A. E. WHYTE, T. HART ANDERSON.

whereof I aiiix my signature o the same,sub

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