US397503A

US397503A - Island

Info

Publication number: US397503A
Authority: US
Publication date: 1889-02-12
Anticipated expiration: 1906-02-12

Description

(No Model.)

J. D. HUNTINGTON.

TOOL FOR TURNING AND SHAPING EMERY WHEELS.

No. 897,503. Patented Feb. 12, 1889.

W TN E5555 I NVE NTEIH Uniirnn drains ..-AT ppICiE TOQL FOR TURNING AND SHAPING EMERY-WHEELS.

SPECIFICATION forming part of Letters Patent No. 397,503, dated. February 12, 1889.

Application filed April 9, 1888.

To all 2071 0111 it may concern.-

Be it known that I, JOSEPH D. HUNTING- TON, a citizen of the Dominion of Canada, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Tools for T u rning an d Shapin g E mery-\\' heels and for Similar Purposcs,of which the following is a specification.

My invention belongs to that class of tools used for turning and shaping emery-wheels and grindstones of other inaterial,-havin one or more revolving disks or toothed wheels set in the end of a split or forked holder. In such tools the disks are of metal, hard and very thin. The tool is placed upon a firm rest, and the edges of the disks are brought in contact with the face of the revolving wheel to be cut down or shaped. This causes the disks to revolve, and the cutting is effected by the impact of the edges of the revolving disks i11- stead of by the familiar rigid diamond tool. As these disks are thin, it is desirable to give them m u chla-terz-tl support as possible from the arms in which they are mounted; hence they are set so that their edges project but little beyond the forward end of the holder, and the degree of opening between the prongs must be proportioned to the space required by the disks. It is still further desirable in providing for this lateral support that the inner faces of the supportingarms should be parallel with the plane of the disks as far back from the forward end of the tool as the disks extend. It is also desirable in spread ing or contracting the jaws that the holes in which the arbor revolves or takes its bearing should be kept in line. The holders in which the revolving disks are mounted are at pres ent made with rigid arms designed for a given number of disks occupying a given space; hence the tool cannot be used for agreater or less number of disks nor for the same number of greater or less thickness.

The objectof my'invention is to render the holder capable of accoinmodatingmore or less disks, as occasion may reij uire, by providing means for (INlillltllllg or contracting the jaws, and also means for preserving the parallelism referred to when the same is desired. For this purpose I construct the prongs of the holder much longer than the diameter of the Serial No. 270,060. (No model.)

i disks, and between the disks and the junction of the prongs I pass a screw transversely 3 through both arms of the holder. If the holder is constructed with the maximum opening between the arms, the office of the screw will be only to draw them nearer together and afterward to allow them to spring apart by releasing them from the control of the screw to the desired extent. It obvious that the screw can readily be arranged to both draw the arms together or spread. them apart. When the degree of movement of the arins or prongs is to besuch as to require attention to maintaining their parallelism in that portion contiguous to the disks,I insert another screw between the junction of the prongs and the first-mentioned screw and parallel with it. The purpose of this second screw is to operate in conjunction with the first to spring the arms and bring the portion beyond the first screw into parallelism.

In the accompanying drawings, illustrative of my invention, Figure l is a top view of my invention. Fig. 2 is a side view of the same, and Fig. 3 a forward end View.

H is the handle; A A, the arms or prongs; (7, a disk, and a- (shown in dotted lines in Fig. 1) is the arbor on which the disk revolves. I prefer that the arbor should also be allowed to revolve to diminish the friction of the disk.

8 is the screw which may serve to draw the arms together, and s the screw passing through an arm and resting against the inside of the opposite arm to spring the arms apart between the point of their junction and the screw .91 c is a cap covering the end of the arbor, and ismade concave on the inside. This cap serves the purpose of keeping the grit out of the bearings of the arbor, and also of holding a little oil for lubricating the bearing. The arbor may be a straight pin, in which case the cap 0 retains it in position.

Z is a lug or guide, of more or less convenience, which reaches beyond the rest and is held back firmly against it to steady the tool.

It is often desirable to present the disk with a slightly-oblique direction to the face of the wheel to be shaped. In this position the disk cuts a path. wider than its thickness. As a convenience for this use of the tool I may slightly bevel the under side of the prongs,

IOO

which bears on the rest, tormin g a guide which determines the inclination.

It is apparent that by the use of my 'in 'vention holders of the same patternv may be adapted to one or several disks or toothed wheels, or a combination of both, and that the number of disks can be changed in the same holder from time to time, and that in each case the disks can be properly mounted with the utmost facility. ()ther arrai'igements ot' screws will readily suggest themselves to accomplish the purpose of my invention. Thus i if two belts or screws were passed transversely through both arms, each with the screw-head resting against the outside of the first arm, and having a collar resting against the inside of the same arm and threaded only on that portion entering the opposite arm, the parallelism ot' the arms beyond the screw nearest the disk can always be secured whether it be desired to ad 3' ust converging or diverging arms.

My invention is adapted to be used by hand, and also to be held in the tool-post of a lathe or other fixture for turning up emery-wheels in place of diamond tools.

\Vhat I claim,and desire to secure by Letters Patent, is

1. A tool for shaping emery-wheels, consisting of a disk or disks, pron A A, havin g bearings at their front end for the disk or disks, said prongs being adapted to be adjusted toward the disk to confine the same against lateral movement, an adjusting screw for moving the arms, and a second screw forcontrolling said movement, whereby the arms may be adjusted to parallelism and in close proximity to the disk situated between them, substantially as described.

2. A tool for shaping emery-wheels, consisting of a disk or disks, and a holder for said disk, consisting of spring-prongs A A, having bearin gs for the disk and screw for adjusting the spring-prongs to parallelism and proximity to the disk, substantially as described.

3. In combination, the Wheel, the spindle therefor, the prongs A A, having bearingopenings for the spindle, said prongs being movable from and toward each other, whereby they may be adjusted close to the wheel, and a screw for adjusting the prongs to parallelism and in close proximity to the disk, substantiall y as described.

JOSEPH I D.. HUNTINGTON.

\Yitnesses:

JOHN W. HOGAN, O. LAPHAM.