US318952A

US318952A - Lewis bush

Info

Publication number: US318952A
Authority: US
Publication date: 1885-06-02
Anticipated expiration: 1902-06-02

Description

(No Model.)

L. BUSH, Jr.

TOOL POR DRESSING EMEEY WHEELS.

No. 318,952. Patented June 2, 1885.

UNITED STATES PATENT L' P einen@ LEVIS BUSH, JR., OF CHICAGO, ILLINOiS, ASSIGNOR TO THE AMERICAN MACHINERY COMPANY, OF SAME PLACE.

TOOL FOR DRESSING ENlERY-WHEELS.

:SPECIFICATION forming part oi Letters Patent No. 318,952, dated June 2. 1885.

(No model.)

To all whom. t may concern:

Be it known that I, Lnwrs BUSH, Jr., of Chicago, in the county of Cook and State of illinois, haveinvented certain new and useful Improvements in Tools for Dressing Emery- XVheels; and I do hereby declare that the following` is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which forni a part of this speciiication.

This invention relates to the class of devices for dressing emery-wheels which operate by means of a rotating part held in contact with the face of the wheel to be dressed while said wheel isin motion.

`The object of the invention is to provide certain improvements calculated to increase the efficiency, durability, and cheapness of this class ot' devices; and the invention consists in the matters hereinafter set forth, and pointed out in the claims.

In the accompanying drawings, Figure l is a perspective view of my improved emerywheel dresser. Fig. 2 is a side elevation showing a portion of the headbroken away iu a central vertical section through said head and the rotating cutter. Fig. 3 is au under side viewof the tool'. Fig. et is a transverse section in the axis of the rotating cutter.

A is the handle or body of the tool, provided with a head having a recess, a, adapted to admit the rotating cutter B, which latter is held removably in place by means of a pin, C, journaled in pin or pivot supports a', formed by the side walls ofthe recess c.. As hereshown, and as preferably constructed, the pin Cpasses through one of the supports a', through the cutter, and into the opposite pin or pivot support a short distance, but not entirely through the latter, and is held in place by a laterally pivoted cap, C', adapted to swing out of the way to allow the pin C to be removed. The body A of the tool is provided with a projection, d", on its upperside,whieh overhangs the cutter and is intended to intercept the particles thrown 0H from the emery-wheel in the operation of the cutter.

The principalimprovement of my invention relates to the cutter B, which in this case is a section of a screw cut oi' properlcngth to ent-er between the pivot-supports ct of the head or tool-body A, and which, after having the ribs or thread b cut thereon, may be hardened to any desired degree, and inserted and held in the head by means of the removable pin C.

In constructing cutters of the character herein shown a long rod of steel of proper diameter may have a continuous thread or series of threads, b, cut thereon by means of a lathe or other suitable device for the purpose, and after thus making the thread the rod may be cut into sections B ofproper length and the holes drilled therein for the pivot-pin C, after which said sections may be suitably hardened. This construction of the cutter has the advantage of Working on a single axis parallel-With the face of the wheel to be dressed, and of at the same time presenting a number of working-edges@ namely, the edges of the series of spiral threads b-which have the desired Obliquity with reference to the face of the emery-wheel.

As another improvement in the devices shown, the shoulder b', located on the under side of the tool-body, and which forms a rest or support while the tool is in operation bybeing brought to bear against a stationary part ot' the machine containing the wheel to be dressed, has the transversely curved form shown plainly in Fig. 3, adapting the tool to be swayed from side to side whilebearing against said rest with greater ease on the part of the operator and regularity on the p art of the work performed by the tool.

The projection ai overhanging the cutter, as shown, is also an improvement upon which I make claim, said projection serving to intercept the particles of emery thrown from the wheel in the operation of the cutter and preventing theirstrikingtheoperator. Thesmall hole c continued from the bottom of the recess c, which admits the inner end of the pin C, is to permit a wire or other similar article to be thrust against the pin C i'or the purpose of forcing the latter out of the head and cutter when it is desired to remove the said pin. The hole also affords means for admitting oilto the pin, as does the smaller hole in the cap C', by means of which latter the said cap may be rmly screwed up to its place and retained in position without being disturbed in applying the oil to the adjacent end oi the pin.

IOO

I am aware that it is not new to form the eutter-shaft aperture entirely through the toolbody and to place caps over the ends of seid aperture in order to retain the shaft in place, Wherefore this invention does notineludesueh construction.

I elimini as my inventionl. The combination, with a rotating cutter and a removable shaft or pivot-pin therefor, of a cutter holder or body provided with pivot-pin supports, one of which is npertured to admit the full size of the pin and provided with a retainingeap, and the opposite one of which is recessed :it c on itsimiersurfaee to admit the end ofthe pin and is provided'wth a small hole, c, extending from the reeessythrou gh the support, substantially as described.