US112971A

US112971A - Improvement in turning-lathes

Info

Publication number: US112971A
Authority: US
Publication date: 1871-03-21
Anticipated expiration: 1888-03-21

Description

S.D.SHELD-O N.

TURNING LATHE.

N0. 141z,9'71. Patented Mar. 21, 1871.

mz z'veiss es 1 a cat.

SAMUEL D. SHELDON,OF FITOHBURG, MASSACHUSETTS.

Letters Patent no. 112,971, dated March 21, 1871.

IMPROVEMENT .lN TURNlNG-LA'l'l-IES.

The ScheduIe referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that I, SAMUEL D. Snnnnon, of

'Fitchburg, in the county of Worcester-and-State of,

Massachusetts, have invented certain new and useful Improvements in Lathes; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing, which represents. a front view of so much of a lathe as is necessary to illustrate my invention.

"I: enable those skilled in the art to which my invention belongs to make and use the same, I will proceed to describeit more in detail- The nature of my invention consists in the combination, with the spindle of a lathe or chuck, of a movable cone-pulley, a-friction-plate, an operatinglever, and a stoppingebrake, as hereinafter described.

In tliedrawing- A indicates the supporting-frame;

B indicates the head-block;

(l indicates the lathe or chuck-spindle;

' D indicates the pulley-cone; and E, the operating-leverl The lathe or chuck-spindle G is supported in bearings, F, upon the head-block B, and the pulley-cone D is hung loosely upon said spindle A'loosc collar, G, is arranged on,the small end of the pulley-cone, and projecting pinsi a, at the side of said collar, engage with the upper forked end of the operating-lever E, whereby the pulley-cone D can be moved to the right and left to engage or disengage the friction-clutch. device, by means of which the pulley-cone is'locked to the spindle 0, when desired. The outer rim of the frictionclutch is formed within the large end-of the cone D, as indicated by dotted lines, while the inner rim there'ofds, formed upon a plate or disk, I, which is rigidly secured to the spindle 0, between the end of the cone and the right-hand bearing F.

The friction-plate or disk I is provided with an an-- nular flange, J, and a brake, K, isarranged to press up against the underside thereof, for the purpose of stopping the motion of the lathe or chuck-spindle wlieirtlie friction upon the plate or disk I is released. The rod of the brake K is supported in a vertical position within a lug, L, cast upon the head-block B, and its lower end is joined, by means of suitable the ii'iction-clutch is operated.

"The operating-lever E is fulcrumed between earpieces, N, upon the head-block B, and its lower end I and for the purposes set forth.

is joined, by a rod, P, orother suitable connection, to a treadle, R, by means of which the'levcr E can be actuated to throw in the friction-clutch and remove the brake K, while a suitable spring, S, is arranged, in connection with the-lever E, for actuating the parts.

in the opposite direction, all of which are indicated in the drawing-I '.It will be observed that, by means of this construction, the cone-pulley D can be kept constantly in motion and when it is desired to start the spindle O' the operator has only to place his foot upon and depress the treadle It, when the pulley D will be moved'up to the disk I, and the friction-rims engaging cause the spindle the operator. 1

In the ordinary lathes the belt which runs the counter-shaft requires to be shipped from the tight to the loose-pulley, and the motion of the spindle after.- ward-stopp'ed by placing the hand uponthe pulleycone. This 'occupies considerable time and is a matter of considerable inconvenience, especially when-the work requiresconsiderable changing.

It will be observed that, with my improvements, this inconvenience and delay are obviated; therefore it will readily be perceived by those skilled in the use of lathes that my improvements are'of great utility and practical value, inasmuch as no time is lost in shipping the belt or stopping the motion of the spindle, while the operation of the clutch and brake being per-' formed with the foot-the operator has both hands free, so that he can conveniently attend to any requirementsof the work.

Having described my improvements in lathes,

\Vhat I claim therein as new and of my invention, and desire to secure by Letters Patent, is-

The combination, with the spindle O and movable.

cone-pulley D, of the flanged friction-plate I J, oper-Y.

ating-lever E, and stopping-brake K, substantially as 4 SAMUEL D. SHELDON.

Witnesses:

A. E. Pnrncn, CHAS. H. BURLEIGH.