US1389738A

US1389738A - Grinding-wheel chuck

Info

Publication number: US1389738A
Application number: US397193A
Authority: US
Inventors: Calvin E Cadman
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-07-19
Filing date: 1920-07-19
Publication date: 1921-09-06
Anticipated expiration: 1938-09-06

Description

C. E. CADMAN.

GRINDING WHEEL CHUCK.

APPLICATION FILED JULY 19, I920.

Patented Sept. 6,1921.

6 HIIKQ:

UNITED STATES PATENT OFFICE.

GRINDING-WHEEL CHUCK.

Specification of Letters Patent.

Patented Sept. 6, 1921.

Application filed July 19, 1920. Serial No. 397,193.

To allwhom't may concern: 7

Be it known that I, CALVINEJCADMAN, a citizen of the United States, residing at South Beloit, in the county of Winnebago and State of VVisconsin, have invented certain new and useful Improvements in Grinding-Vheel Chucks, of which the following isa specification. I o

This invention relates in general to grind: ing wheels, and has more particular reference to the chuck in which such wheels are mounted. g 7

It has heretofore been customary in mounting these grinding wheels in chuck bodies to retain them in position by holding means which engage the perimeter of the wheel at spaced intervals only. In such constructions, however, the spaced holding means have a tendency to cut into the surface of the grinding wheel, permitting the wheel to workloose, and furthermore, such a series of engaging points tended to weaken the wheel and render it liable to split or fracture. j 7

One of the primary purposes of my present invention is to provide a holding chuck for grinding wheels of this character. in which the wheel holding or clamping means shall be so constructed that it will engage and clamp the grinding wheel substantially throughout its entire periphery, thus obviatingjthe objections above mentioned.-

Another object of my invention is to provide a grinding wheel chuck which will be simple in construction, cheap to manufacture, and durable in operation, and one which will securely hold the grinding wheel in position without danger of its working loose. 1

it further feature of my invention resides in the provision of spacing means capable of insertion behind a grinding wheel for the purpose of projecting the face of the wheel beyond the chuck after the wheel has been partially worn down.

Other objects and advantages of this invention will be readily understood and appreciated from the following description, when considered in connection with the accompanying drawings.

Referring to the drawings:

Figure 1 is a diametral sectional view of a grinding wheel chuck embodying my invention;

Fig. 2 is a similar view showing the application of my improved spacing ring thereto; and

Fig. 3 is a face view partially in section, of the'chuck, shown in Fig. 2.

By reference to the drawings, observed that the chuck consists of abody, consisting of a disk 5 and an axial flan e 6 formed around the perimeter of'the disk. This body is provided with the usual central opening 7 adapted to accommodate the end of'a shaft upon which the chuck is mounted, and a plurality of sur rounding holes 8 adapted to receive the screws or bolts. by which the chuck is sccured to its supporting shaf The flange 6 of the body is referably thickened near its margin, as indicated by reference character 9, and this thickened portion is provided with an internal groove ll adapted to accommodate the clamping ring 12. This ring or gib preferably consists of a picceof cold rolled steel bent into it will be nr 1 ins rily substantially circular form and sprung into position in the groove. The ring, as will be understood, is split, that is, it is non-continuous, and for the purpose of preventing rotation of the ring within the chuck body. I prefer to equip the body with an inwardly projecting stud orpin 13 extendin into the groove 11 between the opposed ends lat of the ring. Rotation of the ring within the chuck body is prevented by this in.

The chuck body may be made'of any desired size I adapted to accommodate the grinding wheel proper, which is made of abrasive material and is adapted to fit loosely within the body. The grinding wheel is indicated by reference character 15 in Fig. 1, this wheel being of full size and of the relative thickness of a new wheel. After the wheel has been worn down approximately to the outer edge of the body flange 6, it may be removed and re-positioned, as shown in Fig. 2, the wheel being spaced from the disk 5 by a spacing ring 10, preferably of angular shape in cross section to afford a surface of substantial area against which the inner face of the wheel may abut. When the grinding wheel has again been worn down, a thicker spacing ring may be substituted for the ring 16, and in this manner practically the entire body of the grinding wheel may be used up before a new wheel is required.

At regularly spaced intervals around its iii circumference, the body flange 6 is provided with tapped openings intersecting the groove 11, into each of which is threaded a set screw 16, and after the grinding wheel has been positioned in. the body, it is clamped therein by threading these set screws inwardly against the clamping ring 14 so as to compress this ring into tight clamping engagement with the perimeter of the grinding wheel. It will be observed that this clamping ring under the action of theset I screws 16, engages the periphery of the grinding wheel at substantially all points in its circumference so that the wheel is firmly clamped and held throughout its entire periphery insteadiof being gripped at a series of spaced intervals, as has heretofore been customary. The clamping ring, beingof substantial width, does not penetrate the body of the wheel as a series of narrow clamping devices would, and consequently, the wheel cannot work loose, nor is there any tendency toward splitting of the wheel as the result of the clamping action. When it becomes necessary to reset the wheel in the chuck or to replace it by another, this can be readily accomplished by simply loosening the set screws 16, whereupon the clamping ring will expand away from the perimeter of the grinding wheel, permitting the wheel to be removed and repositioned or replaced by another, as occasion may require. It is believed that my invention, its construction, and 'mode of operation will .be understood from the foregoing without further description, and while I have shown and described a preferred embodimentthereof, it should be manifest that the details of construction are capable of considerable modification and variation without departing from the spirit of the invention, as set forth in the appended claims.

I claim:

1. A grinding wheel chuck, comprising a body adapted to receive a' grinding wheel,

said body being provided with an internal groove, a split'ring disposed in said groove, and means acting on said ring for forcing the same into clamping relation with the perimeter ofa grinding wheel disposed within said body.

'2. A grinding wheel chuck, comprising a body including a peripheral axially disposedflange provided with an internal. groove, a clamping ring positioned in said groove,

and a pluralityof set screws carried by said body and adapted to force said ring into clamping engagement with a grinding Wheel disposed within said. body. t

13. A grindingwheel chuck, comprising a body including an axially disposed flange providediwith an internal groove, a split ring seated in said groove, means for preventing rotation of said'ring relatively to the body, and aseries of set screws arranged to act upon said ring.

i 4, The combination of a chuck body provided with an internal "groove, a clamping ring disposed in said groove, means for compressing said clamping ring, a grinding wheel positioned within the body and ring, and a spacing'ring disposed between said grinding wheel and said body.

5. A grinding wheel chuck, comprising a body provided with an: annular flange adapted to surround a grinding wheel, a

compressible I ring interposed between said flange and the entire periphery of said wheel,