US272849A

US272849A - Lathe

Info

Publication number: US272849A
Authority: US
Publication date: 1883-02-27
Anticipated expiration: 1900-02-27

Description

(No Model.)

J. BIRKENHEAD.

LATHE.

No. 272,849. Patented Feb.27,1883.

UNITE STATES v ATENT rtree.;

JOHN BIRKENHEAD, OF MANSFIELD, MASSACHUSETTS.

LATHE.

SPECIFICATION" forming part of Letters Patent No. 272,849, dated February 27, 1883.

Application led October 10, 18H2. (No model.)

To all whom it may concern Be it known thatI, JOHN BIRKENHEAD, of Mansfield, in the county of Bristol, ofthe State of Massachusetts, have invented a new and useful Improvement in Lathes 5 and I do hereby declare the same to be described in the following specification and represented iu the accompanying drawings, of which- Figure l is a front elevation, and Fig. 2 an end view, of a lathe provided with my inveu: tion, thenature of which isdetined in the claims hereinafter set forth. Fig. i5 is a vertical section taken on the line a b of Figi. Fig/1 isI a view ofthe mechanism .applied to the toolcarriage and its feeding-shaft thereof.-

My said invention may be said to be a stopmotion for the tool-carriage, the purpose ofit being mainly to arrest the feeding or lateral movement; ofthe said carriage at any desirable position ofits traverse, as occasion may require.

In the drawings, A denotes the lathe bed or frame; B C, the puppets; l), the tool-carriage, the latter resting upon the bed or being adapted to it in the usual manner.

E is the feeding-shaft ot' the tool-carriage, such shaft being grooved lengthwise, asshown at c, and supported in bearings d e, so as not only to be capable of revolving, but of moving lengthwise of it. in them. in the bearing thereis applied thereto and to theshaftaspring, j', for retraotin g the shaft.

The driving-shaft ofthe feeding mechanism of the lathe is shown at g. which shaft and the mandrel are provided with sets ofcone-pulleys h and i, about which an endless band is to run to give rotary motion from the mandrel. The shaft g is tubular, and is sustained by and revolvesjon a shaft, g', which is fixed to land pro jects from an arm, h. (See Fig. 3.) Said arm encompasses and turns upon thebearingd, and is provided with ears t t" and a screw, lc, the whole being as shown in Fie. 3, so as 'to enable thearm to beturnedon the bearingand clamped thereto,in order to admit of depression of the shaft g, to el'ect, as occasion may require, the tightening ofthe endless band ofthe cone-pul- 1e \s. Fixed on the shaftg is a pinion, l, that engages with a gear, m, fixed on the shaft E. A housing, n, fastened to the arm h', extends over the gears fm and l.

From the above it will be seen that the rotary motion of the shaft E is occasioned by the gears l and m when the gear l is putin revolution with and by the shaft g. It will also be seen that on the shaft E being moved to the left far enough in its bearings its gear m Will he thrown out of engagement with the pinion l, and thereby rotary motion of such shaft E will be stopped, in which case the lateral movement of the tool-carriage will be arrested.

On the shaft E there is arranged concentricallya worm or screw, F, so applied to saidshaft that it will revolve with and at the same time slide upon it. The worm is disposed within au oil cup or reservoir, R, the ends of which abut against the ends of the worm, said reservoir being secured tothe partp ot the tool-carriage, a ring, G, encompassingthe shaftEand adapted to it, so as to be capable of being moved ou itlengthwiseofit, provided with aclamp-screw, q. to tix itin place on the shaft. Furthermore, there is to the partp a projection, r, which extends backward therefrom in range with the ring G, and there projects from the lathe-bed a toothed rack, s,which' engages with a pinion, t, suoli pinion beingsupported on a journal, u, sustained by the part p. The pinion terug-ages with a gear, c, turning on a tixedjournal. On another fixed journal, x, supported by the part p, is a worm-gear, y, that engages with the worm F, and is provided with the spur-gearz. Fulcrumed on the journal is a rockerdever, a', from which a handle, b', extends through a slot, c,in the pat-tp. This levercarries upon journals c'z d', projecting from it, two gears, e f', either of which, by means of the lever, can be thrown either out of or into engagement with the gear c. The gear e' engages with the gear z and the gear ff with the gear c', and when either ofthe gears ej" isin engagement with the gear v the other is outofengagement therewith. While one of the gears e'j" is in engagement with the gear c', the tool-carriage will be moved laterally in one direction, it being moved in the opposite direction when the other of said gears e'f is in engagement with the gearc.

1f. while the tool-carriage is being moved in a direction to the lett, we may desire to stop it, when it tnay attain any position within the extent ofits traverse, we move the ring Gr to the right position on 'the shaft E and clamp such ring to the sh'aft. On the projection r being carried by the carriage into contact with the IOO ring, the shaft E will be moved endwise in its hearings with the carriage until the gear m is moved out ot' engagement with the gear l. On such dlsengagement ofthe said two gears l and m taking place, the stoppage ofthe carriage results.

Un the shaft'u is a crank, w. On turning the lever a so as to throw both gears e andf out of engagement with the gear e, and afterward revolving the crank 10 the right way, the carriage will he moved so asto allow the spring f to retract the shaft E to carry the gear m back into engagement with the gear l, after which further motion ot' the carriage in the same direction may be produced by movingthe lever a so as to throw into engagement with the gear 'v the proper one ofthe two gears ef'. What I claim as my invention is as follows, vlz:

1. The combination of the projection r of the tool-carriage, and the adjustable ring G, and its clamping-screw applied to the Worm-shaft, and

with the shaft g of the driving-geert, arr-V ranged and. oper-ating'substantially as and for the purpose set forth.

3. Jointly with the bearing d, the arm h', and the gear-wheels, the housing n, as and for the purpose set forth.

JOHN vBIRKENHEAD;

Witnesses:

R. H. EDDY, E. B. PRATT.