US53058A - Improved device for securing the tail-stocks of lathes - Google Patents

Description

A. THOMAS.

Device for Securing Tail Stdcks of Lathes.

Patented March 6. 1866.

NEED STATES PATENT OFFICE.

ALFRED THOMAS, OF WORCESTER, MASSACHUSETTS.

Specification forming part of Letters Patent No. 53,058, dated March 6, 1866.

To all whom it may concern Be it known that I, ALFRED THOMAS, of Worcester, in the county of Worcester, in the State of Massachusetts, have invented a new and Improved Mode of Fastening Tail-Stocks to Engine and Turning Lathes; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of my invention consists in fastening tail-stocks to engine and turning lathes, to their ways or beds, by means of a compound bolt or mechanism so constructed as to admit of its being forced out of a perpendicular line, thereby shortening the distance between the bed or ways of the engine and the support of the tail-stock of the turning-lathe by means of a forcing-screw or its equivalent, phelreby fastening the tail-stock firmly to its )Gt To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

1 construct my improvement to fasten tailstocks to engine and turninglathes in the following manner, substantially, reference being had to the inclosed drawings, and the letters thereon, delineating the separate parts of the same.

' A is the bed or ways; B, tail-stock; U, the upper part of the lateral sliding portion of the tail-stock B, to which the spindle and center is attached, with all the usual and necessary parts to operate the same. D is thetightening-screw, to force the compound bolt or mechanism out of a perpendicular line, thereby fastening the tail stock B to the bed firmly. c e are two ratchet-wheels, which are made fast to ti ghtening-screw D. ff are the pawls of the ratchet-wheels e c; G, the lever to which the pawls f f are attached by means of a common axis through the lever G, and by reversing the pawls f f, s0 as to throw them into the teeth of the ratchetwheels 0 e, a forward and backward movement of the screw D can be obtained, thereby loosening or tightening the tail-stock B at pleasure with great ease and very little motion, although I do not confine myself to use of pawlsff and ratchets e e, as a common wheel, wrench, or handle can be used to turn tightening-screw D. H is a suspension bar or rod, to which the compound bolt or mechanism for connecting the shoe or cross-head to the under part of the bed or ways A, so

that when screw D is forced against the compound bolt or mechanism it will throw it out of a perpendicular line and will draw all the parts firmly together. i i are the lugs on which the suspension-rod H rests; jj are two cross-bars for the purpose of keeping the compound bolt or mechanism in a central position on suspension-bar H. k 70 are adjustingscrews for the lateral motion of the upper part ofthe tail-stock B. l I are the lugs for receiving the ends of the screws 70 7 M, upper arm of the compound bolt or mechanism, made with an eye, through which suspensionrod H is passed, and the lowerend is made with a head rounded on the under side, so as to allow of a direct and even strain without injury to the bolt 01' head; N, a union-grasp,

to hold and connect all the federal parts of Y the compound bolt in peaceful harmony with each other. It is made with recesses at the top and bottom to receive the heads of the upper and lower arms of the compound bolt, and is made with apertures ample to be removed at pleasure; also, is made on the side next to tightening-screw D with a V-shaped recess to receive the taper-shaped end of the said screw D, to accommodate the deflection of't-he compound bolt or mechanism; 0, the lower armof the compound bolt, with head on the upper end made the same as the upper arm, M, and the lower end is passed through the shoe P, with a screw and nut on the same to adjust thelength of compound bolt or mechanism; P, the shoe with upward projecting guides, which pass through guides q q, and made on and a part of the lower half of tail-stock B for the purpose of preventing it from catching on the under side of the bed or way A when the tail-stock is moved on the ways, as the guides will keep the shoe perpendicular and free from friction.

Havingthus fully described my invention, what I claim as new, and desire Letters Patout for, is-

1. The mechanism called the compound bolt, constructed .as described, in combination with lugs 45 i, suspension-bar H, substantially the same, and for the purpose set forth.

2. In combination with the compound bolt, the tightening-screw D, ratchet-wheels e e, pawls ff, and lever G, or\their equivalents, substantially in the manner and for the purpose set forth.

Witnesses: ALFRED THOMAS.

H. 0. RICE, DANIEL It. PRATT. t

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