US1290990A - Abrading-disk. - Google Patents

Description

UNITED STATES PATENT OFFICE.

JOSEPH A. HICKEY, 0F PHILADELPHIA PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO FRANCIS BANCROFT, OF MERCHANTVILLE, NEW JERSEY. v

ABRADING-DISK.

Specification of Letters Patent.

Patented Jan. 14, 1919.

Application filed May 9, 1916. Serial N 0. 96,302.

To all whom it may concern:

Be it known that I, JOSEPH A. HICKEY, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Abrading- Disks, of which the following is a specification. 4

One object of my invention is to provide an abrading disk which not only is simple in construction but is extremely efficient in operation. In abrading disks as heretofore constructed the abrading surfaces have been 7 apparent from such description.

In order that my invention may be more readily understood and its advantages more fully appreciated reference should be had to the accompanying drawing in which I have illustrated certain convenient forms of embodiment thereof, but it will be understood that changes in the details of construction may be made within the scope of the claims without departing therefrom.

In the drawings Figure 1 is a top plan view of a portion of an abrading diskconstructed in'accordance with my invention;

Fig. 2 is i a transverse sectional view thereof;

Fig. 3 is a transverse sectional view of the parts enlarged taken on the line 33 of Fig. 1; and

Fig. 4 is aview corresponding to Fig. 3 but showing a modification of the construction.

Referring to'the drawings, 1 designates a base of the disk of metal or. other suitable material to which an attaching or holding plate 2 of metal or suitable material is secured by means of screws 3. Intermediate the base 1 and the holding or attaching plate 2 a. backing of hard rubber or other suitable material 4 is provided. The screws 3 not only pass through the plate 2 but also through the intermediate sheet of shock absorbing material 4. The attaching or holding plate 2 is provided with a series of openings 5 the lower ends of which are enlarged as indicated at 6 leaving the opening at its upper end 7 of less diameter. These portions of the respective openings of different size are connected with each other by an annular inwardly inclined shoulder 8.

The grinding elements comprise plugs 9 consisting of suitable abrading material, the lower ends or bases of which plugs are constructed so as to conform to the respective openings 5, that is to say, the said plugs at their lower ends are of greater diameter than the remainders or upper portions thereof. Such portions of different diameters are connected with each other by an annular shoulder 10 which bears against or contacts with the annular shoulders 8 of the attachmg or holding plate 2. The plugs are each provided with a blind opening or recess 11 so that the upper portions of the said abrading elements are annular as shown. It will be understood, however, that instead of the openings 5 and the plugs 9 therein bein circular in transverse section they may e of any other suitable shape as may be desired.

Instead of forming the plugs of the constructionshown in Figs. 1, 2 and 3 of the drawing the plugs may be of truncated cone shape. In Fig. 4 I have shown plugs 12 which are of truncated cone shape, the bases of which are located in correspondingly shaped openings 13 in the attaching or holding plate 2 by means of which they are attached to the base 1. In the construction shown in Fig. 4, as in the construction shown in Figs. 1, 2 and 3, an intermediate sheet of hard rubber or other suitable material 4 is employed. The plate 2 and the sheet 4 are secured to the base 1 by means of screws 3 as in Figs. 1, 2 and 3. The openings 14 extend entirely through the plugs 12 although it will be understood that depressions or bllnd openings only may be provided.

It will be understood that the disk,'which comprises the parts 1, 2, 3 and the grinding elements consisting of the plugs, is secured in any suitable manner to a rotating element of a machine.

By reason of the fact that during the rapid rotation of. the disk when it is in use the air circulates freely between the plugs, which are situated in spaced relation to each other, they are prevented from being too greatly heated. Furthermore, the depres- 1 ments projecting sions and pores of the said plugs which open upon the active or operative surfaces thereof donot become filled andclogged with the material being operated upon and by reason thereof do not become hard and smooth. The result is that the elements retain their capacity for cutting rapidly the material which is being abraded thereby. The material which may be cut or detached from the article being operated upon falls between the said plugs or may fall into the openings 11 or 14 thereof, as the case may be, but is not pressed or ground into the depressions and pores as is the case with flat abrading or rinding disks in which the grinding suraces are continuous.

I claim:

1. An abrading disk comprising a base member, an attaching plate having a plurality of holes extending therethrough, the outer ends of said holes being of less diameter than the inner ends thereof, grinding plugs situated insaid holes, the base portions of said plugs conforming to and fitting the said holes, and means for securing the said base member and the said attaching plate together, the said base member operating at all times to retain the said plugs in position in said holes.

2. An abrading disk comprising a plate having aseries of holes therein the diame ters of the outer ends of said holes being less than the diameters of the inner ends thereof, abrading elements situated in the said holes the abrading ends of said elebeyond the front surface of said plate and the opposite ends thereof being substantially flush with the inner surface of said plate and the base end portions of said elements fitting the said holes, and means independent of said plate and said elements operating to secure and retain the said elements in position in said holes.

3. An abrading disk comprising a. plate member having a plurality of openings therein the outer ends of said openings being of less diameter than the inner ends thereof, a plurality of abrading elements situated in said openings the base end portions thereof conforming to and fitting said openings and the outer abrading end pf each of said elements being provided with depressions therein whereby each element is formed with an annular abrading surface, and means for securing and retaining the said elements within the said holes.

4. An abrading disk comprising a relatively thick base member, an attaching metallic plate having a plurality of holes extending therethrough, the outer ends of said holes being of less diameter than the inner ends thereof, grinding plugs situated in the said holes the base portions of said plugs conforming to and fitting the said holes, a sheet of compressible material situated between the said base member and the said plate, and means for securing the said base member, plate and compressible sheet together.

5. An abrading disk comprising a base member, an attaching member having a plurality of holes extending therethrough, said holes respectively having one portion larger than the other which portions are separated by a shoulder, plugs situated in said holes, said plugs respectively having one end portion larger than the remaining portion, said portions being separated'by a shoulder, the largerportion and a part of the smaller portion of said plugs fitting the corresponding parts of the said holes respectively, the shoulders upon the said plugs contacting with the shoulders in the said .holes, and means for securing the base member and attaching plate together, the said base .member operating to hold the plugs in position.

In testimony that I claim the foregoing as my invention, I have hereunto signed my name this 22d day of December, A. D. 1915.

JOSEPH A. HICKEY.

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