US1896946A - Rubbing block - Google Patents

Description

J. M. GAUSS RUBBING BLOCK Feb. 7, 1933.

Filed May 22, 1930 INVENTOR. BY Juan ATTOR Patented Feb. 7, 1933 UNITED STATES PATENT OFFICE JULIUS u. Gauss, or scum BEND, INDIANA, ASSIGNOR TO THE sTUnEBAxEE. con- PORATION, or sourn BEND, INDIANA, a CORPORATION OF NEW JERSEY BUBBING BLOCK This invention relates to rubbing blocks and particularly to blocks for finishing automobile bodies and the like.

The principal object of my lnvention 1s to provide a ru bing block comprising a resilient base having a plurality of abrasive members secured therein adaptedjo have limited movement to conform with slightly irregular surfaces.

A further object is to provide a rubber-base having a plurality of abrasive members vulcanized therein, the abrasive members being slotted and then broken at the connecting webs after being vulcanized to the base.

Further objects and objects relating to details of construction and manufacture will be apparent from the detailed description to follow, and then claimed, having theabove and other objects in view.

In the drawing which shows a suitable embodiment of my present invention,

Figure 1 is a side elevation of the rubbing block, a portion of the base being broken away, and in section, to better show the invention.

Figure 2 is a view corresponding with Figgre 1, showing a slightly modified-form of ase.

Figure 3 is an inverted perspective 'view of the device shown in Figure 1.

Figure 4 is a perspective view of one of the abrasive members illustrated in the preceding views.

In the rubbing of automobile bodies and the like, it has been customary to use a plurality of abrasive members tied together with a string or tape which are held in the hand of the workman for finishing .the object. These rubbing blocks are not entirely satisfactory because great skill and care must be used in handling them to prevent one or more of the blocks from slipping out of place which, of, course, would interfere with the work. In the present invention, a rubbing block is provided which has all of the advantages of the devices heretofore used but which eliminates the disadvantages inherent therein so that the rubbing block can be used by those who are not so skilledin the art of wise secured, a thin metal plate 12 over which is positioned and preferably vulcanized thereto a finishing piece 13. Bolts 14 having their heads 15 within the member 11 extend through the metal plate 12 and the cap 13 for attaching the rubbing block to a vibrating machine not shown. I

Abrasive members 16'which maybe natural sandstone, artificial sandstone, or any other suitable material, are seated within the cup-shaped base 11, these members preferably being rectangular in form so that they can be seated against each other in face to face contact to form the complete structure as shown in Figure 3. Each abrasive member 16 is preferably slotted in one direction at 17 and in the opposite direction at 18, as

shown in Figures 3. and 4:, the slots extending nearly through these members so as to leave relatively thin connecting webs 19; After the blocks 16 are stacked in assembled position, they are put in a mold, the base is vulcanized thereto and if desired, the rubber Y is filled in the slots 17 and '18, as shown in Figures 1 and 2, to form a complete bond for these members to hold them securely to the base. I

'In Figure 2, I have shown a rubber base 20 having a convex upper surface adapted to fit the palm of the hand and having a recess 21 formed around the edge thereof which may be gripped by the fingers-so that the rubbing block may be easily handled. The

abrasive members 16 which may be of any of the materials heretofore described, are secured in the rubber base 20 in the same manner as they are secured in the rubber base 11, the difference in shape of the respective bases being merely for convenience inattachin the rubbing block to a machine or for han use.

After the abrasive members 16 are vu1- canized to the base 11 or 20, the respective abrasive members are preferably hit witha hammer or other suita le instrument whereby the welis 19 are brokenas at 22, as shown 5 in Figures 1 and 2, so that the rubbin block comprises a large pluralit of small a rasive pieces, firmly secured to t e base member.

As the material tobe finished oftentimes has slight irregularities therein and as it is with those irregularities, it is desirable to use as small piecesas is practical so that the respective pieces will conform to the contour of the ob ect to be finished. In thepresent invention, theabrasive members are vulcanized to the base memberso that there is ,-no danger of an of the small abrasive members becoming di odgedor slipping out of place and at the same t1me, the backin is suflicientsurface to be finished so as to smooth out any low spots which may be resent therein.

.While I have illustrat one embodiment of the present invention, it will be understood that formal changes and changes relating to details in construction and manufacture will be a parent. to those skilled in the art from my closure and description of the invention, and I therefore do not wish to limit my invention to the exact details shown but on the contrary desire to claim the invention broadly as well as specifically as is indicated in the appended claims.

What I claim is:

1. A rubbing block comprising, a cupshaped resilient base, a plurality of slotted abrasive members positioned therein in face tofacecontact, and means within said slots 40 for securing)said members to said base.

2. A rub ing block comprising, arubber base and a plurality of slotted abrasive members vulcanized thereto in face to face contact, the webs at the ends of said slots being said base. v

3. A rubbing block comprising, a rubber base and a plurality of slotted abrasive members having their bases vulcanized thereto and having a rubber bond extending, through 4. rubbing block comprising, a rubber base and a plurality of abrasive members vul-' 'canized thereto in face to face contact, said members bein base within said slots.

5, A rubbing block comprising, a rubber base, a lurality of abrasive members having a p urality of slots extending throu h each member bonded to said base, and a ru ber bond extending through said slots.

- 8. A rubbing block comprising, a. resilient base, a-plnrah -of abrasive members having slots exten mg in perpendicular direcfi 'tions through each member, and a resilient desirable to have the rubbing block conform ly resilientso that each of the a rasive memhere will readily conform with the irregular slotted and bonded to said 4 bond extending amu ements connected with said base. 7. The method of form "rubbing blocks comprising the slotting of a rasive members, arranging said members in rows, and vulcamzing a rubber base thereto.

8. The method of forming rubbing blocks comprising the slotting of a rasive members,

arrangingiaid members in rows, vulcanizing said mem rs to a rubber base and break the webs at the ends of said slots after s ifi members are vulcanized to said base.

9. The method of formin rubbingblocks comprising, the slotting of a rasive members, arranging said members in rows, securing and members to a base and breaking-the webs at the ends of said slots after said mem-' here are secured to said base.

Signed b me at SouthBend, Indiana, this 16th day 0 May, 1930. g

, t JULIUS M. GAUSS.

' broken after said members are vulcanized to

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