US386177A - Universal feed attachment for engine-lathes - Google Patents

Description

(No Model.) 2 Sheets-Sheet I.

E. A. ALPRESS.

UNIVERSAL EEED ATTACHMENT EOE ENGINE LATHES.

No. 886,177. Patented July 1'7, 1888.

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(No Model.) 2 Sheets--Sheet 2.

E. A. ALPRESS.

UNIVERSAL FEED ATTACHMENT FOR ENGINE LATHES.

No. 386,177. Patented July 17, 1888.

Til /U IINTTED STATES PATENT OFFICE.

ED'WARD A. ALPRESS, OF NE\V BRITAIN, CONNECTICUT.

UNIVERSAL FEED ATTACHMENT FOR ENGINE-LATHES.

SPECIFICATION forming part of Letters Patent No. 386,177, dated July 1'7, 1888..

(No model.)

To all whom it may concern:

Be it known that I, EDWARD A. ALPRESS, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Universal Feed Attachments for Engine-Lathes, of which the following is a specification.

My invention relates to improvements in feeding mechanism for engine-lathes, and the object of my improvement is to provide simple and effective means for feeding the tool at anydesired angle to the length of the lathebed.

In the accompanying drawings, Figure 1 is a plan view of part of a lathe-bed and carriage with my universal feed applied thereto. Fig. 2 is a transverse vertical section of the same on line 10 w of Fig. 1, some of the parts being shown in side elevation. Fig. 3 is a vertical section, partly in elevation, of the main portion of my feed, the plane of section being indicated by the linear a" of Fig. 4.. Fig. 4 is a horizontal section, partly in elevation, of the same on lineg g of Fig. 3; and Fig. 5 is atransverse section, partly in elevation, of the same on line .2 s of Fig. 4.

A designates an ordinary lathe bed, and B the lathe-carriage mounted thereon. Instead of making the nut for the screw a of the feedcarriage rigid with the lower part of the carriage, I form said nut on a slide, 1), which is arranged to slide in proper ways in a line at right angles to the ways of the lathe-bed, substantially in accordance with Letters Patent No. 46,152, dated January 31, 186.3. Ialso provide the lower part of the lathe-bed with a slotted rearward extension to better guide and support the rear end of the slide; but this is not essential, provided the slide be sufficient] y rigid. At the rear of the lathe I provide a feed-shaft, c, and upon said shaft I secure the worm (Z, Figs. 2 and 5, the same being fitted to the shaft by means of a slot and spline, so that the worm may be revolved by the shaft, and at the same time be free to move longitudinally along the shaft in a well-known manner. I also arrange upon the rear of the lathe-bed two parallel bars, CC, which serve as a sort of table to support the feed attachment and as ways for it to slide upon.

My feed attachment has alower bed or block,

D, which is fitted to the bars C C, so as to slide thereon, and is loosened or fastened in place by means of a strap, 0, and holding-screw f, or equivalent clamping mechanism, by the loosening of which the universal feed mechanism may be free to be moved along the bars C C, or by means of which it may be firmly fastened in any desired position to said bars. In the center of this lower bed, D, I arrange a vertical shaft having at its upper end a beveled gear, 1, and at its lower end a worm-gear, h, which meshes into the worm d on the feedshaft 0, and is driven thereby. An upper bed or block, E, is pivotally mount-ed on the lower bed, D, by having a tenon which fits into a circular recess in the lower bed, D, so that the upper bed may be swivcled to any desired position thereon. I secure this upper bed in the adjusted position by means of the set-screw j. This upper bed, E, is also provided with ways 76, within which I arrange a sliding feedblock, Z, which carries a vertical shaft, m, squared at its upper end, and having at its lower end a wornrgear, a. The blocklis pivotally connected, by means of said shaft m, with a similar sliding block, 0, which block 0 is connected to the rear end of the slide I) and moves in a slot made to receive it in the rearward extension of the carriage B, said block 0 practically constituting a part of the slide 1). Upon one side of the worm-gear a, and passing over the center of the beveled wheel g, is a feed'screw, p, having a pinion, q, which meshes into the gear 9. Upon the opposite side of the wormgear a, and capable of engagement therewith, is a similar screw, 1', set parallel thereto and serving the purpose of a stationary rack. This screw 1' is, however, cutaway or left threadless upon one side through the operative portion of its length, as shown in Figs. 4 and 5, and provided with a handle, 8, by means of which said screw may be set with its threads in engagement with the pinion a, or it may be turned a partial revolution, so as to bring the threadless space or cut-away portion directly opposite the teeth of the wormgcar a, so as to throw said screw out of engagement with said worm-gear.

In using my feed attachment the screwf is loosened and the lathe-carriage and feed attachmentmovedlongitudinallyalong thelathebed into the desired position for use. The

screw f is then tightened to fasten the lower bed, D, firmlyin place. The upper bed is then adjusted 'so as to bring the ways 7c is into any desired angle to the ways of the lathe-bed,when it is secured in position upon thelower bed by the set-screw j. The screw 1- is set in the position shown, with its threads engaging the teeth of the worm-gear n. The ordinary feed for moving the lathecarriage B laterally-that is, along the ways of the lathe-bedis thrown out of gear and not used. Motion is cornmunicated to the fe'edshaf't 0 by any suitable driving mechanism connected with the lathe-head. The tool-post and its tool are set in the desired position within the carriage B, as in otherlathes. Thefced-shaftccarriestheworm d, therebyimparting motion to the worm-gear h and geared wheel 9, which wheel, meshing into pinion q, drives the screw 10 and the engaged worm-gear n. The screw r, serving as a stationary rack, prevents the wornrwheel n from rotating about a stationary axis, and thereby necessitates in the movement of said gear a the movement ofthe sliding feed-block Z, in which said wheel is mounted, along the ways k k. The sliding feed-block Z being connected with a similar block, 0, at the rear part of the slide 1), acts as a driver and necessitates a movement of the upper part of the tool-carriage transversely to the lathe-bed. If the ways k are set at right angles to the ways of the lathe bed, the tool moves directly backward without giving any lateral movement to the carriage; but if the ways k k are set at an incline to the ways of the lathe bed, as shown, the connections of the sliding feed-block Zwith the lower part of the carriage by means of the slide 1), which moves in ways or guides within said lower part,necessitates a movement of the lathe-carriage bodily in the longitudinal direction of the lathebed, while its upper part, which carries the toolpost and tool, is moved backward, thereby, as

the resultant motion, carrying the tool in a path which is parallel with the ways 7c 70. In order to move the sliding feedblock Z quickly back to the other end of the ways k k for setting the feed again, the screw r is turned over to bring its cut-away or threadless portion facing the teeth of the worm-gear n, and a crank is applied to the squared upper end of theshaft on which said gear is mounted, whereby the gear a can be rotated to carry the sliding feedblock I back on the ways It It. In so doing the screw 1) acts as a stationary rack and the gear a as a pinion engaging therewith and traveling with the block I.

I claim as my invention- 1. The combination of a lathe-bed, the lathecarriage fitted to slide longitudinally on said bed, and the feeding device herein described, the latter consisting, principally, of the ways 70 7c, the sliding feed-block fitted to said ways and pivoted to a slide on the lathe-carriage,

and a feed-screw set parallel to said ways k 70 for driving said block along said ways and thereby feeding the lathe-carriage, substantially as described, and for the purpose specified.

2. In a feed attachment for lathes, the combination of a lathe-bed, a lathe-carriage fitted to slide longitudinally on said bed, the slide b, fitted to slide with the upper part of the lathe-carriage in a line at right angles to the main ways of said lathe-bed, the bars or ways 0 O, the lower bed or block of the feed attachment mounted on said bars or ways 0 O and adapted to be adjusted and secured at the desired position thereon, the upper bed or block of the feed attachment pivo'tally mounted on said lower bed and provided with ways It It, and the sliding feed-block within the ways of said pivotally-mou-nted upper bed and pivoted to the slide 1) on the aforesaid lathe-carriage, substantially as described, and for the purpose specified.

3. In a feed attachment for lathes, the combination of the lower bed or block adapted to be adjusted and secured in a stationary position by one side of the lathe-bed, the beveled wheel 9, mounted within said lower bed, the upper bed or block pivotally mounted on said lower bed and having ways k k, the feed-screwp, mounted within said upper bed and provided with pinion g, which engages the wheel 9, the sliding block for traveling on said ways It It, the worm-gear it, carried by said sliding block, thestati'onary screw or rack 1", and mechanism for driving the wheel g, substantially as described, and for the purpose specified.

4. In a feed attachment for lathes, the combination ofthe upper bed or block having ways 70 k, the feed-screw p, attached to said bed, the

sliding block for traveling on said ways, the worm-gear n, mounted on said sliding block, and the stationary screw or rack 1', having a threadless portion and adapted to be partially rotated to engage and disengage its threads from said worm gear, substantially as described, and for the purpose specified.

5. In a lathe, the combination of adjustable ways 70 7c, the sliding feed-block fitted to said ICS IIO

ways, a slide to which the sliding feed-block Z l ED\VARD A. ALPRESS.

WVitnesses:

JAMES SHEPARD, J 012m EDWARDS, Jr.

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