US598317A - Antifriction-bearing - Google Patents

Description

(N0 Model.) f

' A. J. GRINNBLL.

vANJJIFRIGTION BBMING.- y l No. 598,317. 'Patented-Feb.. l?, 1898t a y Irl-GZ- WENEESES "Ninn e STATES l PATENT rrrcn.

ANTIFRICTION-BEAFHNG SPECIFICATION forming part of Letters Patent No. 598,317', dated February 1, 1898. Application filed February 1, 1897. Serial No. 621,385. (No model.)

To @ZZ whom it may concern:

Be it known that I, ADELBERT J.GR1NNELL,

A of Waltham, in the county of Middlesex and State of Massachusetts, have invented'certain new and useful Improvements in Antifriction- Bearings, of which the following is a specification.

This invention has relation to antifrictionl bearings for shafts, and more especially for the crank-shafts of bicycles; and it has for its object to provide such improvements in the same as will render them more durable and decrease the element of friction to a minimum.

To these ends the invention consists in the improvements in devices of the character specified, such as are illustrated in the accompanying drawings and now to be described in detail and then pointed out in the appended claims. A

Reference is to be had to the drawings and to the letters marked thereon, forming a part of this specification, the same letters designating the same parts or features, as the case may be, wherever they occur.

Ofv the drawings, Figure l represents in side elevation, Awith a portion broken away, a crank-hanger equipped with my improvements. Fig. 2 is a central vertical section on the line 2 2 of Fig. l and looking in the direction of the arrow. Fig. 3 shows in perspective the spider and one of the rings, one of the disks being in position to be inserted in the spider. Figs. 4 and 5 illustrate another embodiment of the invention. Figs. 6 and 7 illustrate another form of spider. i

In the drawings, ct represents a barrel or hanger which is formed or secured to the converging bars b h b2 of the bicycle-frame.

@indicates the cran k-shaft, which is formed with a rigid hardened cone c and an adjustable hardened cone c2 in threaded engagement therewith.

The barrel or hanger is formed with internal flanges a a', against which hardened bearing-rings d d abut, being threaded into the internally-threaded ends of the barrel. As each end of the hanger is provided with the same device and constructed in the same way, I shall describe only one, and it" will be understood that the description will be equally applicable to the other.

e indicates a spider which is U-shaped in a pin f, passed through the flanges e e2 of the V spider and projects through an aperture e3 in the spider, so as to have its periphery bear against the bearing-cone c' c2. Each disk is also formedwith oppositely-extending hubs f2 f3, the first of which bears against the inner edge of' the ring b and the other of which bears against the flange g on the outer ring g, which is externally threaded and is screwed into theA end of the hanger or barrel.

Preferably the ring g is formed with an outwardly-projecting fiange g2, which abuts against the end of the barrel, so as to tightly close the same, and the ring dis also provided with apertures d3 to receive a spanner or other suitable tool by means of which the ring may be removed or secured in place. f Now it will be seen that each disk bears against thecone at its periphery, its two hubs bearing against the inner edges of the two rings d and g, both of Which are hardened, the disks being like- Wise hardened, so as to increase their wearing qualities. The flange e of the spider is wider than that at c2 and extends up outside the flange on the ring g, so as to loosely secure the spider and the said ring g.

In securing the parts in place the ring d is vfirst screwed in until it abuts against the flange ct. Then the spider e is inserted through the aperture in the ring g until the flange g of the latter bears against the flange e ofthe spider. Then two of the disks are inserted in place by slipping them between the flange e and the flange c2 of the spider, and the other disk is inserted in place, as shown in Fig. 3, there beinga recess in the flange e2 to permit its insertion.

When the parts consisting of the ring, the spider, and the disks are all assembled, they are placed in the end `of the barrel, and the ring g is screwed tightly in place. Then the shaft c is inserted and the cone o2 is adj Listed until both sets of disks bear evenly at their peripheries on the cone and at their hubs on the rings.

For the purpose of preventing the accumulation of dust and dirt in the barrel I provide dust-guards consisting of rings h, which may be forced into rabbets in the rings g.

Instead of forming the spiders U -shaped in TOO cross-section, as shown, I may form them of two parallel rings m m, connected together by shouldered rivets fm', as shown in Figs. 8 and 9.

In Figs. land 5 I have illustrated another embodiment of my invention in which I dispense with the spider. Referring to these last-mentioned figures it will be seen that I employ two hardened rings j and 7c, which are secured together by rivets 7c', having spacers 7a2, both rings being recessed, as shown in Fig. 4, to receive the hubs of the disks Z.A In this construction the rings are not threaded into the end of the barrel, but are forced in and held against rotation by a key k3. Thus from the foregoing it will be observed that I have provided a construction which is extremely simpleand which at the saine time is highly efficient in operation and possesses great durability and wearing qualities.

Each disk bears at three points, (one point with its periphery against the cone and at two points with its hub against the rings,) and by reason of its relatively large diameter (as compared with the ordinary antifriction roll or ball) reduces the friction and requires less power to rotate it.

In the construction shown in Figs. 1 to 3 the spider and the rolls may travel relatively to the rings and the latter are held at a predetermined distance apart, and in the construction illustrated in Figs. 4 and 5 the disks are inserted loosely in place and bear loosely against the rings and are capable of traveling around the same and the cone, being properly spaced by their engagement with each oth-er. In both of these constructions, which I have described hereinbefore, the disks are all free not only to revolve around the axis of the shaft, but are also adapted to revolve about the rings, each disk bearing with its periphery against the shaft (or the cone on the shaft) and having an oppositely-extending hub bearing against the edges of the ring. By this peculiar arrangement the frictionA is reduced to a minimum.

I have stated that the rings are revoluble about the'shaft, for of course it will be understood thatthe cones are to all intents and purposes a portion of the shaft, but may be omitted, if desired.

I claim- 1. Abearin g for a shaft comprising a hanger or barrel, two parallel rings inserted in each end, and a series of disks revoluble about the axis of the shaft and adapted to roll around said rings, said disks each bearing with its periphery against the shaft and having an oppositely-extending hub bearing against the inner edges of the rings.

2. In combination, a shaft having cones, a barrel or hanger, two parallel rings inserted in each end of the barrel, and a series of disks all revoluble about the shaft and adapted to roll around the rings, said disks having their peripheries bearing against the cones, and having oppositelyextending hubs bearing against the said rings.

3. In combination, a shaft having cones, a barrel or hanger, two parallel rings inserted in each end of the barrel, a series of disks all revoluble about the shaft and adapted to roll around the rings, said disks having their peri pheries bearin g against the cones and having oppositely-extending hubs bearing 'against the said rings, and means for spacing said disks.

4. A bearing for a shaft having cones comprising a barrel or hanger, two parallel rings inserted in each end of the barrel and having a space between them, a series of disks freely revoluble about the axis of the shaft and each provided withv an oppositelynprojecting hub, said disks each bearing with its periphery against 'the cone, and with its hub against the inner edges of the rings, and spiders in which said disks are mounted.

5. The combination with a shaft, and a barrel, of parallel separated rings arranged in said barrel, a spider arranged between the rings and the shaft and having flanges, and a series of disks journaled in the ianges of the spider, and bearing with their peripheries against the shaft, and having hubs bearing against the inner edges of the rings.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 29th day of January, A. D. 1897.

ADELBERT J. GRINNELL'.

Witnesses:

E. B ATCHELDER, y P. W. PEZZETTI.

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