US300272A

US300272A - Chuck

Info

Publication number: US300272A
Authority: US
Publication date: 1884-06-10
Anticipated expiration: 1901-06-10

Description

(No Model.)

U. LEWIS;

CHUCK.

' No. 300,272. x Patented June 10,1884,

Unrrnn- H Srirrns PATENT ()rrrcn.

CHARLES LElViS, OF AMSTERDAM, NEW YORK, ASSlG'NdI-t TO DAVIS W. i SHEELER, OF SAME PLACE. I

CHUCK.

EPECIFICATIGN forming part of Letters Patent No. 300,272, dated June 10, 1884.

T0 ctZZ whom it may concern: l Be it-known that I, (hmnrns Lnwrs, a citizen of the United States, residing at Amsterof New-York, have invented certain new and useful Improvements in Machines for Turning Spring-Heads; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in [o the art to which it appertains to make and use I p the same, reference being had to the accompap nying drawings, and to the letters and-figures of reference 111 agked thereon,which form apart of this specification.

This invention relates to an improved chuck adapted to be used for holding the heads of flat or semi elliptic metal springs while being turned in a lathe or other suitable machine; and it consistsin the peculiar construction and arrangement of the parts of the chuck, as will be hereinafter more fully described, and then specifically pointed out in the claims.

In" the annexed drawings, which illustrate the invention, Figure 1 is a perspective view of my improved chuck. Fig. 2 is a side view of the same, showing a spring-head in place for turning. Fig. 3 is an elevation showing the chuck mounted in a lathe, with the cut ting or finishing tool in position for turning the roughened headof a spring held in the chuck. Fig. 4 is a vertical section of the chuck on the line or zupf Fig. 2. Fig. 5 is a perspective view of the steel-faced sliding plug used for holdingthe head of the spring in 5 place, and Fig. 6 is a perspective view of one end of a vehicle or other flat or semi-elliptic spring, showing one of the ears turned, and the other unturned or rough, as it appears at ter forging.

The letter A represents the chuck, which maybe made of cast metal or other suitable material, and is formed with transverse grooves or recesses a aone on each side of the centei -as shown in Fig. 1'. 4.5 b is a radial groove or recess, enlarged and circular in shape, at the center of the chuck, and adapted to receive one end of the spring to be turned. The spring-head is held firmly in thegroove b by means of a steel-faced slidso ing plug, awhich plays verticallyin agroove dam, in the county of Montgomery and State f in the chuck.

Application filed January 15, 1884. (No model.)

that forms a right-angled continuation of the groove 1). The plug 0 extends'aeross the groove a, and enters a groove or recess,--d, in the chuck, as shown in Fig. 4. Into the npperend of the plug is screwed a bolt or rod, 6, which extends 5 5 through an aperture in the recess d to the outside of the chuck, and is surrounded with a spiral spring, a, that is held between the chuck and a head or pin on the end of the rod c. The other end of this plug 0 is semicircular in shape, 60. and is provided with two shoulders, ff,adapt ed to rest on or press against the end 9 of the spring between the ears of the head. The plug 0 is also provided with a slot, h, Fig. 5, through whichis passed awcdge orkey, i, by means of 6 5 which the plug is lowered or pressed down. This wedge t slides in the slot h, constantly bearing against the upper face of the groove a in the chuck. A pin, j, passed through the narrow end of the wedge serves as a stop, and prevents the wedge from slipping out of the slot h when the plug is raised or withdrawn from the center. Itwill be observed that when the key or wedge t is withdrawn the tension of the spring e raises the plug 0, so as to enable 7 5 the work to be removed and another piece inserted. The groove ct in the face of the chuck is merely designed to balance the chuck and distribute its weight uniformly. I The operation of turning a roughened sprin head is as follows: The head is inserted in the groove b, the plug 0 being first raised by the accnlar end, fitting between the ears, and the 0 shoulders f f resting on the end 9 of the leaf.

Inthis way the spring-head is rigidly secured The leaf of the spring may be further secured in the chuck, if desired, by a wedge and guard secured to the outer end of 5 the groove 1), as shown in dotted lines in Fig.

2. The tool rest or stand it (see Fig. 3) is then moved up to the head, the tool Z having been. adjusted in its standard, and the chuck is then revolved by means of pulleys or other suitable 10o means, the head of the spring of course revolving with the chuck,while the tool operating on the head turns it smooth and true. By means of this chuck all spring-heads are turned uniform and require no centering before being put into the machine.

Heretofore the head has been turned by extra finishing, as by emery-wheels, filing, and the like, or by inilling'tools; but this is expensive, and when milling-tools are used they are liable to easily get out of repair, and it is also necessary that each head should be centered before being milled.

By means of my invention the centering of the heads is done away with, each head fitting in the same place and being operated upon by the tool evenly and uniformly, as before de- .scribed.

Having thus described my invention, what I claim as new, and desire to secure by Letters 20 Patent, isa r 1. In a machine for turning spring-heads, a rotary chuck provided with groovesa b, recess d, sliding plug 0, and key 2', substantially as described.

2. The conibination,with the chuck A, pro- 4 vided with a transverse groove, a, radial groove 1), having a circular enlargement at the end coinciding with the center of the chuck, and the recess d, of the sliding plug 0, having slot 71, the rod 6, spring 6, andkey or wedge '5, sub- It is hereby certified that in Letters Patent No.300,272, granted. June 10, 1884, upon the application of Charles Lewis, of Amsterdam, New York, for an improvement in Chucks, the name of the assignee was erroneously written and printed Davis W. Sheelex; that said name should have been written and printed Davis W. Shuler and that the proper correction has been made in the files and. records pertaining to the case in the Patent Office, and should be read in the Letters Patent to make it conform thereto.

Signed, eountersigned, and sealed this 8th day of J uly, A. I). 1884.

[SEAL] M. L. JOSLYN,

Acting Secretary of the I ntcrior. Countersigned BENJ. BUTTERWORTH,

Commissioner of Patents.