USRE4390E - Improvement in turning-lathes - Google Patents

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I-ietters Patent No. 60.163, dated December 4, 186,6; reissue No. 4,390, dated. May 23, 1&11

IMPROVEMNT IN r'uRNlne-LATHE-s.

TholohodnhxefenedtointheleLettenPntentandmaklngpartofthesame.

lTo all whom it may concern ABe it known thatI, LUTHER R. FAUGHT, of the city and county of Philadelphia, io the State of Pennsylvania, have invented a. new 'and useful Improvement in Lathes, of whichthe following is a specification.

The objectk of my vinvexition. is lto tighten lathespiudles in their sockets to prevent the spindle 'i'rom being forced out of its central position and to compensate wearfof the parts; to which ends,

My improvement consists in a novel method of com bining a lathe-stock, a lathe-spindle, a clamping-sleeve surrounding the spindle,

and an adjusting-nut surrounding the sleeve, as hereinafter more fully described.' A

` In the accompanying drawing- Figure 1 isa vertical longitudinal central section, -Athrough a lathe-stock embracing my improvement, at

the line x a; of g.,2, and

Figui-e2 o transverse section turungh the same at the line y y of fig. 1.

As constructed prior to'the date of my invention,

the stationary or tail-spindles of lathes have been clalnped-in their stocks by set-screws or equivalent devices, the tendency of which was to force thetailspindle out of lille with the live spindle, and correspondingly to impair fthe accurate working of the lathe.

These lathes, moreover, had no means of compensating wearof the spindle and stock, except by reboring and bushing, which process entails considerable expense and delay.

My improvement obviates both these objections, the clampiug'action of the sleeve'beiug exerted equally around the periphery of `the spindle and toward its axis, and the wear is hence equal at all points, and can be taken upwhenever necessary by varying the position nl the handle which operates the nut.

The spindle O is mounted in a stock, A, and moved Vlongitudinally therein, when required, by a screw on the rod B,'in`the usual manuel- A'split sleeve, D, which is turned to a conical form at its outer end and has astrong screw-thread cnt upon its. inner end, is bored out to tit accurately upon the spindle C, which it embraces within the stock A, which is bored out to receive the cone-shaped portion of the sleeve D.

v A cylindrical nut, E, litting neatly in'a recess formed in the stock-A, engages the screw upon the cylindrical lportion of the sleeve D, and, accordingto the direction in which it laterne-1 hymnL handle, F, which` canV be screwed into one of a series of holes in its periphery, draws the sleeve D into or protrurles it from the stock, and correspondingly clamps or releases the spindle C, as the case may be.

When drawn into the stock by the partial rotation of the nut the split sleeve D closes upon the spindle O, upon which is formed a feather, c', which rests in a slot formed in the sleeve, and ,the spindle, sleeve, nut, and socket are clamped firmly together.

A reverse movement of the nut pushesthe sleeve outward, thereby relaxing its tension upon the spindle, and allowing the latter to b`e maved longitudinally in the stock, as required.

Wear of the vparts is compensated for, wheneverv required, by inserting the handle F in a dilerent hole in the nut, which .enables the sleeve to bedravu further v into its recess in the stock.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination, with the spindle, of the stock, the split screwed clamping-sleeve embracing the spindle,

and the nut embracing the sleeve, these parts being' Witnesses Guo.- H. KIRK, J ons H. REnFInLp.

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