US1181495A - Roller-steady for lathes. - Google Patents

Description

W. A. WEAVER & W. T. BROWN.

ROLLER STEADY FOR LATHES.

APPLICATION FILED Nov.20. 1915.

1,181,495, Patented May 2,1916.

2 SHEETS-SHEET l.

W.IA. WEAVER & W. T. BROWN. ROLLER STEADY FOR LATHES.

APPLICATION FILED NOV. 20, 1915.

2 SHEETS-SHEET 2.

Patented May 2, 1916.

WILLIAM A. WEAVER AND WILLIAM T. BROWN, 0F GOVENTRY, ENGLAND.

ROLLER-STEADY FOR LATI-IES.

Speccaton of Letters Patent.

Patented May 2, 1916.

Application iled November 20, 1915. Serial No. 62,629.

ATo all whom t may concern Be it known that we, WILLIAM ARTHUR WEAVER and WILLIAM THoMAs Birowrnboth subjects of the King of Great Britain and Ireland, and residents of Coventry, Warwickshire, England, have invented an Improved Roller-Steady for Lathes and the like, of which the following is a specification.

This invention refers to roller steadies as used in lathes and like machines, such as milling or grinding machines, and particularly those combined with a tool holder for cutting and sizing bars, pins, studs and the like, the roller steadies serving to counteract the pressure of the tool on the work.

The invention consists of an improved construction of roller steady wherein the rollers are capable of being adjusted simultaneously and held to the work by a single operating or adjusting device, thechief features of the invention being two independent roller-carrying slides arranged within a casing common to both and each designed to move toward and away from the work, in combination with a screw and cone acting directly upon the slides `for causing the rollers to simultaneously approach the work, and a spring for simultaneously drawing both slides and rollers away from the work as the cone is retracted.

A further feature of the invention is an arrangement of lubricating duct and connecting union for conveying a lubricant to the cutting tool while in operation.

Upon the accompanying drawing, Figure 1 illustrates a side exterior elevation (partly in section), and Fig. 2.a sectional plan view of the improved roller steadycombined with a tool holder. Fig. 3 illustrates a further side elevation, but with the outer cover or end plate of the roller slide holder removed. Fig. 4 illustrates a transverse sectional elevation of Fig. 3 on line :1J-a'. Fig. 5 illustrates a like view to Fig. 3, but with portions of the roller slides removed, and with the fixed central stem of the holder casing in section, the section being taken on line y-z 7Fig. 4. Fig. 6 illustrates, in perspective, the roller slides separate from their holder. Fig. 7 illustrates a cross section of a modication. Fig. 8 illustrates a side view of a further modification. Fig. 9 illustrates a sectional plan view of Fig. 2.

According to the invention, the improved roller steady comprises a body or base part a, suitable for attachment to the machine in which the roller steady is to be used. In one with such base part is a casing b with detachable side cover plate b and forming the holder for the roller slides and rollers. The interior of the holder is cylindrical, except at one point, where it is formed with a gap or opening b2. This opening lies opposite to the tool holder, which is in one with the base a, and consists of a raised part c formed with a through passage and provided with a set-screw (Z for the purpose of holding a tool placed in the holder, see Fig. l. In the rear wall of the casing b and in the cover plate b is an opening for the work to pass through, the base part a having a part a in which also is an opening for the work to pass through.

Passing centrally through the casing b is a fixed stud or boss b3, the ends of the boss being preferably turned down to fit a hole in the back of the casing and in the cover plate b, see Fig. 2. Within the annular chamber left between the stud or boss b3 and the inner cylindrical face of the casing b are arranged the roller slides and rollers. Each slide (see Fig. 6) is made in two parts e', e2, each part being in the form of an approximately flat piece of metal (preferably hardened steel), and the two parts, when placed side by side, being designed to fit within and fill a portion of the annular space within the casing Z), see Figs. 3, 4 and 5. At one end each part of each slide is thicker than the other end, see Fig. 4, and at such end the two parts touch each other. Also at the other end of each part and upon each of the opposite faces of the two parts is a stud c3, the two studs being in alinement with each other and onetouching or almost touching the other, so as to collectively form the axle of a steel roller f placed between the two parts of the slide. For the purpose of adording the necessary clearance between the slides and the work, the ends of the slides are cut away as much as possible, half the diameter of each stud c3 projecting beyond the edge cf the slide, see Fig. 6. For helping to hold the parts c', e2 in their proper relative posi tions, and for causing both to move together while allowing the parts to be separated at any time for the purpose of renewing the roller f', the part e2 is provided with a fixed pin g adapted to project loosely through a hole in the part e', see Figs. 2, 3 and il. The said pin g extends across the space between the parts of the slide and lies near to the boss or stud b3 when the slide is in the casing Z. By means of a. spring 7L, see Fig. 5, arranged within the said space and secured by its ends to the pin g of one slide and to the pin g of the other slide, the spring serves to draw the slides toward each other. To allow room for the spring, and also to allow the spring to have a more direct pull on the slides, the boss or stud Z13 may be filed away or grooved on the side next the spring, see Fig. 5.

At the rear of the casing Z) is a bearing b" and floating nut b5 and through such bearing and nut passes a screw 1I, the forward end of which, within the casing b, is provided with a cone j. This cone, with the rotary and longitudinal movements of the screw, is designed to engage conical or beveled faces on the adjoining` ends of the two roller carrying slides, the beveling of the slides extending preferably across the full thickness of the part c2 and partly across the thickness of the part c, see Fig. il. lith the screw i fully retracted, the cone j allows the slides to meet or almost meet, and thereby hold the rollers f, at their furthest distance apart. Upon however,the screw z' being screwed into the casing, the cone j causes the slides to separate, and the rollers f, f to approach each other, the movements of the two slides being equal and simultaneous. In this way, with the apparatus in use, and with the bar to be operated upon passing through the casing Z), the single regulation of the screw Z serves to bring both rollers f, f against the bar, or, with areverse rotation, to move both away from the bar.

The roller-carrying slides, by being formed to the curve of the casing b and stud b3 are caused, when operated by the screw z', to move in a curved path, thus insuring the convergence of the rollers on to the work at the proper points. The screw 'Z is provided with a nut la by which the screw, after acting upon the slides to adjust them, may be firmly locked against accidental disturbance.

As an alternative, the screw 2 may be provided with a cone, the narrow part of which is next the screw, see Fig. 7, the action of the screw then being reversed in operating to separate the slides. In such connection the screw may screw through a floating bush Z, this latter, while free to float, being held to the casing b by a flange Z and nut Z2, while the screw is held, after adjustment, by lock nut m.

the conc j, for separating the slides the screw 0 then being arranged to screw through the cylindrical part of the casing Z). In lieu of forming the roller axles studs in one with the parts c", c2 ofthe slides, which is the preferred construction, a pin may be used fixed to or in one with one part and project loosely through a hole in the other part.

For the purpose of supplying oil or the like to the cutting tool, the base a is provided with a duct or passage a?` which at one end is vertical and opens immediately below the cutting end of the tool, see Fig. l, while at the other end it is fitted with a supply pipe s. This pipe rises up to a point above the level of the casing Zn and terminates in a socket or union s fitted with a flexible packing ring s2. By means of this union the operator can readily connect the usual oil supply pipe, the end of the pipe being merely slipped into the socket and the joint being' made by the ring s2. By supplying the oil upward and on to the point of the tool, see Fig. 9, the speed of cutting may be increased.

That we claim is 1. In a combined roller steady and tool holder for lathes and the like, and, in combination, a cylindrical casing, and a supporting base integral with the casing, said base having at one part an opening for a tool and at such part constituting a tool holder, and said base also having a duct or passage for guiding a lubricant upward and on to the point of a tool, when in the holder, and said casing and a vertical vpart of the base, having an opening for the work7 to pass through, a pair of slides within the casing, a roller carried at one end ofeach slide, and said slides and rollers movable paths converging toward or diverging from the work, means, carried by the casing, for simultaneously advancing the slides and rollers toward and against the worln,` and means, inclosed within the casing, for simultaneously withdrawing the slides and rollers from the work on the said slide-advancing means being operated to allow of the withdrawal, as set forth. Y

2. In a combined roller steady and tool holder for lathes and the like, and, in combination, a cylindrical casing, and a supporting base integral with the casing, said base having a art extendmo' u ward at a short distance from the casing and ysaid casf,

said slides and rollers movable in paths converging toward or diverging from the work, means, carried by the casing, for simultaneously advancing the slides and rollers toward and against' the wor-k, and

means, inclosed within the casing, for simultaneously withdrawing the slides and rollers from the work on the said slide-advancing means being operated to allow of the withdrawal, as set forth.

3. In a combined roller steady and tool holder for lathes and the like and, in combnation, a cylindrical easing, one side of which is xed and the other removable, a central stud secured to the fixed side of the easing and extending across the interior of the casing, a supporting base integral, with the casing, and said base having a part eX- tending upward at a short distance from the casing, and said easing and the upstanding part of the base each having an opening for the work to pass through, a pair of slides within the easing, a roller carried at` one end of eaoh slide, and said slides and rollers movable in paths converging toward or diverging from the wor a screw passing loosely through a hole in the Wall of the casing, a loose floating nut within the casing with which the screw engages, a tapered part on the end of the screw adapted simultaneously to engage the slides to separate them, and a spring lying against the said central stud of the casing and at one end engaging one of the slides and at the other end engaging the other slide, as set forth.

In witness whereof we have hereunto set our hands in thel presence of two witnesses.

WILLIAM A. WEAVER. WILLIAM T. BROWN.

Witnesses:

B. D. BLUNDSTONE, GEO. W. WoRsEY.

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

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