US1737099A - Surfacing apparatus - Google Patents

Description

NOV. 26, 1929. H, R, STRATFORD 1,737,099

sURFAcING APPARATUS Filed J111yv29. 1927 m @CPM A TTORNEY.

Patented Nov. 26, 1929` UNITED STATES PATEN olf-FICE HEBT R. STRATFORD, OF CLEVELAND, OHIO, ASSIGNOR '.IICD THE STRTMORE COM= PANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO SURFACING Application led July 29,

rlhe presentinvention, relating as indicated to surfacing apparatus is more particularly directed to an improved surfacing or abrasive disk and to a means for supporting and re- 5 niovably retaining the disk while in opera- 10 ly securing thereto, or removin tion. rl`he principal object of the invention is the provision ol a new and improved supporting pad .having a certain compressibility and simple and convenient means for quicktherefrom, a new and improved surfacing isk.

rlo the accomplishment of the foregoing and related ends, said invention, then, consists ol the means hereinafter fully described and particularly pointed out in the claims; the annexed drawing and the following description setting forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used ln said annexed drawings llig. l is a bottom plan view ot one form of my improved surfacing disk; Fig. 2 is a section ol the same on the line 2 2 in 1F10. l llig. 3 is a central transverse section througli my improved disk and supporting pad showing the engagement between the two; llig. l is a view similar vto Fig. 3, buton an enlarged scale and showing the engaging portions of disk and pad; Fig. 5 is a bottom plan view oi another term of surfacing disk; and llig. 6 is a partial section on an enlarged. scale showing the engagement between the 5 disr el Fig. 5 and complementary supporting p Surfacing machines are now in quite general use lor the surfacing, i. e., the abrading, polishing, etcf, of metal, wood and other or casing provided with handles for the use ol an operator and having a suitable source of power either contained within the casing (as in the form ot an electric or air motor), 5 or transmitted through the casing by means oic gears contained therein from a flexible shalt or other driving means. machines includes an extending shaft on which there is ordinarily supported a supporting disk or pad, to which is removably panels, in which the machine comprises a head This type of APPARATUS i927. serial No. 209,193.

work. lt is very desirable from the standpoint of successful operation ol the disk that it be relatively treerom the su porting pad, although necessarily attached t creto at one or more points adjacent to the center, and

it is equally desirable, 'in order to secure convenient and rapid removal and replacement of worn disks, that the latter be readily de tached from the pad and a new disk positioned with equal convenience and quickness. The present invention is particularly directed to an improved means tor securing the surface ing disk to the supporting pad, such means combining both the necessary freedom ot movement between disk and pad, except at the point ot attachment, andthe convenience and speed ol attachment and removal.

ln lig. 3, l have shown a typical type of pad consisting otlapped plates d, 5, 6 and l ot resilient material, such as rolled steel, upon the uppermost plate 5 of which is secured 'a compressiole pad or disk Il.. To the plate 7 is secured a hub n9 provided with a tlaiige 8, the hub being adapted to be removably secured to the extending end ot the driving shalt ot the machine described above so each other and integrally united to the lay ers of rubber l0 by Suitable `vulcanization., while the upper layer l2 ot iabric is provided with an inwardly extending tongue portion 13 free trom the adjacent rubber 10 and capable of being inserted betweenv a relient collar l5 secured to a surfacing disk 16.' .disk 16 may be termed ot various materials, but is ordinarily a composite diskV formed of layers ot a suitable paper stock, to which is The adhesively united a fabric, while to the latter the grains of abrasive are also adhesively unitedon one surface. To the reverse side of the disk is secured a collar 15 provided with an outwardly extending flange 17 adapt-Y` ed to be inserted between the extending portion 13 of the fabric 12 and the adjacent layer of rubber 10. If necessary radial slits'may be formed in the iange 17 to permit of its more convenient introduction between the element l3and the pad 10 proper. After these eiements have been enga ed as described the pressure of the disk agalnst the work and the unavoided friction between the contacting surfaces of the elements 15 and 13, 13 and 17, and 17 and 1() will provide a very secure driving engagement between disk and ad, and yet one which may be readily severed y merely pulling the disk away from the pad once t ie machine is stopped for the purpose of applying a new disk.

In Fig. 6 I have shown a pad provided with a plurality of inclined radially extending slots 20, which may be either separated slots or may form part of a single encircling slot, into which are adapted to be inserted oppositely directed wings 21 secured to the lower surface of the abrasive disk 22. If the slots are separate slots, as shown in Fig. 5, there is of course a direct driving engagement between the radial end wall of each slot and the corresponding adjacent edge of the wings 21, while in the event of a continuous slot in the pad the friction between the side walls of the wing and the slot is entirely suiiicient for driving the disk in unison with the pad.

In either of the forms described above the disk may be readily inserted and instantly removed from the pad while the engagement in two forms of the device is through relatively extensive frictio'nal surfaces pressed into engagement by the pressure of the disk against the Workl and therefore graded according to the resistance to the driving, or it .is a direct driving engagement between wings on one element and cooperative slots or driving faces on the other. The entire device is simple, in eX ensive and extremely convenient and rapld in operation.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be em-Y ployed.

I therefore particularly point out and distinctly claim as myinventicn 1. In apparatus of the character described,

- the combination of a yieldable supportingpad provided with a projecting driving wing, andV a surfacing disc provided with a driving surface positioned to be engaged by said wing whereby friction between said wing and driving surface due to the pressure of the disk toward the pad serves to rigidly secure the same together. l

2. In apparatus of the character described, the combination of a yieldable supporting pad provided with a projecting driving wing on one surface, and a surfacing disc' having a complementary drivin surface positioned to be operatively engage by said wing on said pad whereby friction between said wing and driving surface due to the pressure of the disk toward the pad serves to rigidly secure the same together.

3. In apparatus of the character described, the combination of a yieldable supporting pad provided with an annular frustrolconical driving wing on one surface, and a surfacing disc have a. complementarypocket adapted to receive said wing in drivin engagement, said disk when pressed towar said pad being adapted to rigidly lock the engaging surface of said wing within said pocket.

Signed-b me, this 27th day of July, 1927.

' H RBERT R, STRATFORD.

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