US1584835A - Sachusetts - Google Patents

Description

May 18 1926.

S. M. BLANCH MEANS FOR HOLDING AND CENTERING GRINDING AND POLISHING WHEELS OR THE LIKE Filed June 27, 1925 Patented May 18,1926.

SVEN MALCOLM BLANCH, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO FLEMING MACHINE COMPANY, OF WORCESTER, SACHUSETTS.

MASSACHUSETTS, A CORPORATION OF MAS- MEANS FOR HOLDING AND CENTERING GRINDING AND POLISHING WHEELS OR THE LIKE.

Application filed June 27, 1925. Serial No. 40,116.

this invention is all the wheels of the same size and having the same grinding or polishing characteristics will be made alike and there will be no difference in the central passage through them. This is done according to the present invention by providing centering discs for such wheels, all these discs being made to fit the wheels of all sizes and kinds and to support them, and the discs being constructed in sets having different diameters of passages through them so that any wheel can be put on any arbor merely by the selection of the right pair of discs. These discs are formed of sheet metal at comparatively small cost and as they vary only in the size of the passage through them for the arbor and as they can be used for all the various kinds of grinding and polish,- ing wheels and discs, they do not involve any material expense to the user and a large number of them does not have to be kept on hand. Even if that is done for safety the expense is very small and the storage room required is also'very little. The trou ble of picking out from stock a wheel having the right sized hole is entirely avoided and the discs are picked out with reference to that feature alone so that the difficulty of selecting them is reduced very materially.

Reference is to be had tothe accompanying drawings, in which- Fig.1 is a side View of .a grinding wheel fitted up with a pair of discs for centering it on an arbor;

- Fig. 2 is a diametrical sectional view of the same on the'line 22 of Fig. 1; 1

Fig. 3 is a View similar to Fig. 2 of a' bufling wheel mounted on the arbor and ready for operation; and

Figs. 4 and 5 are diametrical sectional views of two of these discs of different. sizes.

The object of the invention has been explained in full and it is suflicient to say.

that the various grinding wheels 10 or cloth bufiing wheels 11 are produced in the usual sizes and diameters and the former have a ring 12 at the center having a passage through it larger than any arbor on which they are likely to be placed. The ring 12 can be made of any convenient metal and a soft metal like. lead is preferred. These rings are all bored or turned out at the center to exactly the same internal diameter for all shapes, sizes and kinds of stones, wheels and discs. In other words, all of them are made alike at the center so that if a user wishes to use a particular stone or wheel he does not have to pick through his stock and find one with a rightcenter.

For, the urpose of centering these on arbors of di 'erent diameters, 1 provide a set V of sheet metal discs 14 and 15. I have shown only two. of these but as many sizes of them are required as there are arbors of different diameters in any given shop on which these stones are to be mounted. Each disc is essentially fiat in the plane shown at the left in each of Figs. 1 and 5 and each is provided with an annularprojection 16 leaving a cylindrical shoulder 17. These shoulders 17 are ofexactly the same diameter and size in all of the series of discs so that they will fit inside the rings 12 and 13 and accurately support them as shown in. Figs. 2 and Each disc is then curved backwardly into the main plane to form a circular flat surface 18 or 19 and then bent inwardly at the center to form a cylindrical wall 20 or 21. These cylindrical walls constitute bearings for the arbor A and they are made in different diameters on different discsfor the purpose of fitting the different arbors.

It will be obvious that two of these discs turned end for end will go into one of the rings 12 or 13, as shown in Figs. 2 and 3, and their shoulders 17 will support these rings centrally and accurately. The passages through the two discs are of course of the same size and receive this arbor and center the wheel just as well as if the passage were formed in the wheel itself. After the parts are set up, as shown in Fig. 2, they are put on the arbor A and secured in position in the usual way by collars 22 and 23 and a fastening nut 24, or in any other desired manner.

q grinding wheels having a certain fineness to .find one that will fit the arbor, but he can pick up any wheel he finds having the dimensions and characteristics that he desires and knows that will 0 on the arbor to which he wishes to app y it. It will be obvious that when a man has to find the wheel having a certain diameter and a certain thickness, and also a certain fineness, and in addition has to find one with a passage through it of a certain diameter, it may involve the loss of considerable time merely in searching for the right one, or else a rather elaborate system has to be employed. Furthermore he has to keep on hand an unnecessarily large number of these wheels. Of course he keeps in stock anyway wheels of the diameters, thicknesses and finenesses that he desires but now with this invention he does not also have to keep four or five times as many of them as would be required merely from the qualities mentioned. F urthermore, the selection of the discs that are necessary is a very simple matter because they vary in one particular only. They also occupy very little space and their cost is almost negligible. Although I have illus- 4 trated and described only a single form of the invention and shown it as applied to only two wheels I am aware of the fact that it is capable of general application and also of modification by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore I do not wish to be limited in these respects but what I do claim is l. The combination with a grinding or polishing wheel having a central passage through it larger than the arbor on which it is to be placed, of apair of sheet metal discs having shoulders fitting the inner wall of said passage and located opposite each other, each of said sheet metal discs having a bearing at the center to fit the arbor on which the wheel is to be applied.

2. The combination with a grinding or polishing wheel having a central ring therein with a passage through it larger than the arbor on which it is to be placed, of a pair of sheet metal discs having circular shoulders near their circumferences fitting the inner wall of said passage and located opposite each other in the planes of the two opposite fiat faces of the wheel, each of said sheet metal discs having an integral hearing at the center to fit the particular arbor on which the wheel is to be applied.

3. As an article of manufacture, a sheet metal disc for the purpose described, comprising a flat circular plate having a cylindrical shoulder offset therefrom and having a definite dimension and provided with a flat circular portion integral therewith extending from the inner end of the shoulder and provided with a second fiat portion nearer the center and ofiset from said fiat portion and in the plane of the main portion of the disc and terminating in a cylindrical wall constituting a hearing.

In testimony whereof I have hereunto affixed my si nature.

S EN MALCOLM BLANCH.

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