US200436A - Improvement in mill-spindle bushes and trams - Google Patents

Description

2 Sheets-Sheet 1. E. G. CUSHING. Mill-Spindle Bushes and Trams.

No. 200,436. Pfltented Feb. 19, 1878.

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Wl T/vEsSEs. /N VEN TOR.- Mw Am M/y N.PETERS, FHOT0-L|THOGRAPHER, WASHINGTON. o CA '2 Sheets-Sheet 2.

B. GXGUSHING.

Mill-Spindle Bushes and Trams. No. 200,436. Patented Feb. 19,1878.v

www Y* MPEYERS. PHOTCLLITNUGRAPNER. WASHINGTON D C frummsnms PATENT" OFFICE.

ELBRIDGE e. oUsHiNcr,` or oswEGo, New vonk, AssieNon or ONE-HALF rus RIGHT To HILAND H. fxnivnnicx, or sAME PLAGE.'

IMPROVEMENT- IN'MILL-sjPlNnLl-:BusHi-:s AND TRAMS.V

Specification forming' partof Letters Patent No. 200,436', dated February'lQ, 1878 g application filed June 27,1877.

- Bushes, of which the following, taken in connection with the accompanying drawings, is a M full, clear, and exactdescription. 4 The purpose ofv this invention is to render the bed-stone perfectly self-adjusting `to the yface of the runner when vinmotion; and also has for its object to adjust the spindle in its relativecentral position in the bed-stone by devices which shall be effective and reliable in their operation, and convenient of access formanipulation from underneath the bed-stone aswell as above the same.

yThe invention consists principally, f1rst,'in the combination and arrangement, with the bed-stone, of a concavo-convex bearing, analogous in principle to a ball-and-socket joint, and a series of peculiarly constructed and arranged anti-friction rollers interposed between the respective bearing-surfaces, by means of which the bed-stone is afforded a sensitive universal vibratory movement, respondent to that of the runner when in operation, and thus renders the former perfectly self-adjusting to the face of the latter.

The second part of my invention consists in the combination and arrangement, with the followers or bushing surrounding the spindle, of set-screws passing horizontally through the hub, and provided on the outer end with a cylindrical head, having in its periphery oblique or spiral grooves, and auxiliary set-screws arranged vertically at right angles to the setscrews proper, engaging the cylindrical head of same, and having its ends extended respectively above and below the bed-stone, all constructed, combined, and arranged substantially in the manner hereinafter fully described.

The invention is clearly illustrated in the accompanying drawings, wherein- Figure l is a plan view with the bed-stone removed; Fig. 2, a vertical section on line x x of Fig. l, Fig. 2%, an exterior view of the hub through which the spindle passes, showing more fully the arrangement of the set-screws for adjusting the bush of the spindle, also a `topV view of theplate constituting a part of the device for securing the auxiliary set-screw in' its' position; Fig. 3, a plan view of the under side of the bearing attached tothe bottom of the bed-stone, andFigA an enlarged transverse section of the friction-roller upon which Vthe bed-stone is mounted'.

Y Similar letters of reference indicate corresponding parts. v

- A is the bed-plate, properly secured to the husk-frameand provided in its center with a hub, h, through; which thev spindlesI passes. From the base of the hub radiate a series 'of bearings, b, in the form of sections of a balljoint or of a sphere described from a point in the center of the spindle some distance below the bed-plate. In aslot vin the center of the said bearing is a roller, r, pivoted on a pin or axle, which passes through the bearing b at such relative depth as to cause a portion of the periphery of the roller i' to project above the bearing-surface. Y

'Io the under side of the bed-stone is rigidly secured a plate, B, provided in its center with a concave bearing, a., in the form of an annular section of a hemisphere of somewhat greater radius than and concentric with the spherical lower bearing b. The bed-stone rides with its concave bearing a on the friction-rollers r 1 in the lower bearing b.

The runner, although intended to be kept in perfect balance, will, when in motion, vibrate more or less in various directions, and cause inequality in the bearings between the respective grinding-surfaces; and since the runner frequently attains a very high speed of revolution, accompanied with a correspondingly accelerated 'vibratory movement, it is essential that the seat of the bed-stone should be suficiently sensitive to allow the bed-stone to readily yield to the vibrations or oscillations of the runner. In order to attain this result, I provide the axle c in its periphery with a circumferential centrally-inclined depression, d, and the roller r with an enlarged centrallycontracted eye, c, of such a bevel as to cause the roller to rest on the central interior ridge, and allow it to rock freely without bringing the outer edges of the eye in contact with the pin. The inclination of the depression d in the axleretains `v`the rollery in ,its central axial position.

The second part of my invention has reference to devices connected with the bush of the spindle for the purpose of adjusting the same in its relative central position in the bed-stone.

'l l represent thebusliing'or followers, ttedE in vertical recesses in thehub JL. rujis Aa :setscrew, working horizontally through the shell of the hub, and engaging with its inner end the rear of' the bush. Itsoutcnend is ,prod

vided with a cylindrical head, t, having longitudinal grooves or threads in its periphery.

u' isxan auxiliary set-screw, arranged veerti-l cally on the exterior of the hub h, and at the,

side of the head o of the set-screw proper, and engaging the same by screwthreads on its periphery. ,One end` of the auxiliaryset-screw is extended through the bed-plate A, andprovided underneath the Lsame ,with a suitable headfor manipulation. The upperend passes throogh aslot, f, in a flange, yrloieoeing from the exterior of thehub It abovethe setfscrew proper, and is retained ftherein by Valplate, g',

' attached to the iiange g by a bolt, i, Iand hav- 1- le.` oombieetioe with elle .beeriggsoaeed .b,jthe p in` c,having the beveled'circumtferfen- Atial depression d, tand the' roller r,"having` the eye e, beveled in a relatively greater angle from each side to form a circumferential ridge in the center, constructed substantially as described and shown, forjthepurpose set forth.

2. In combinationlwith a, spindle-bush, the set-screw u, having cyllndrical head fv, with longitudinal grooves or threads in its periphery, and the auxiliaryset- Screwu',f arranged vertically by the side of the head c of the setscrew proper, and provided thereat with extcrllal screw-threads, substantially in the manner and for the purpose set forth.

3. The combination and arrangement, with the spindle-bush, of the set-screw u, having on its outer end the cylindricalvhearlo, withlongtedieal grooves `in its (periphery, and elle auxiliary sessel-"ew .at arranged VVertieally by the side. ofthe heed e of theseersorew proper, and provided with vesteeeal soreW-ehreeds thereat and having ooe. eed exteefledthoegh Vthe bedt-Iilate A, and1 its opposite end'through a projection onthe exterior of .thel hub, 'above .the set-screw proper, substantiallyzas and for the j purpose s peciied.

,4. ,.In combination t with Vthe yset-screw u', the' -liangeg'onhubh havingV slotfrand the plate g, nattached to said liange jby, bolt i, and hav- 4ing .a slot transverse. tothat of therange, substaetially as end for thererrose seeforth- 111 testimony `whereof I `have `jbereueto see my hand in the presence of two attestin g witmesses at Oswego, N- 3?-, this 30th day .of Mey,

.-ELBRIDGEG. Geselle VWitnesses W- e-.Roemsom EB. LE. WELns.

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