US953445A - Tool for dressing emery-wheels. - Google Patents

Description

O. H. STEPHAN. TOOL FOR DRESSING EMERY WHEELS.

APPLICATION FILED PEI-13.8, 1909.

Patented Mar. 29, 1910.

% f I M Svwemroz attorney Witwzooeo LES H. STEPHAN, OF DAYTON, OHIO.

T0011 FOR DRESSING EMERY-WHEELS.

Specification of Letters Patent.

, Application filed February 8, 1909.

Serial No. 476,617.

To all whom it my Be it known that I, CHARLES H. SrnrnAN, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvementsin Tools for Dressin Emery-Wheels; and I do declare the 0 owing to be a full, clear, and exact description'of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to thefigures of reference marked thereon, which form a part of this specification.

My invention relates to a tool for grinding emery wheels.

The invention consists in the method of making the dressing tool and by means of which method a fimshed article is produced having the features hereinafter described and claimed.

The object of the invention is to produce the abrasive material in the hardest possible form or in such a vitrified condition as to meet the requirements. In other words, the abrasive substance is ca able of dressing an emery wheel in the bar est possible form in which it can be produced and the life of such abrasive substance is greatly lengthened by bein thus roduced -in the most intense vit ed con ition.

It is essential that theabrasive substance be incased in a metallic casing after it has been formed and baked or vitrified in order. that the stick so formed shallbe preserved and prevented from breaking whilein actual use. Heretofore, it has been the common method to tamp the abrasive substance into a metallic tube and to then subject the tube with the abrasive substance therein to the baking process; this, however, has been found undeslrable for it is impossible to subject the material to a sufiicient heat without at the same time endangerin the tube itself to melting. It is also deslrable that when the stick of abrasive substance is incased 1n the "tube, that'the two shall be so united or brou ht into such rigid contact as to practicalfy constitute them one'integral member for all practical PIHFOSGS. g I A further object o my invention is to pro- I vide a tool for dressing emery wheels which,

vowing to its formation, may be ppplied at one stage of its existence to sma wheels, and at a later stage of its existenceto be applied to the larger emery wheels. In other words, heretofore it has been the customto provide these tools in different sizes to meet the requirements above indicated. With the present tool, such is not required. I

Preceding a more detailed description of the invention, reference is made to the ac-' companying drawings, of which- Figure 1, is a longitudinal elevation of my lmproved emery wheel dressing tool, a portion' of the metallic casing being broken away to show the vitrified abrasive substance. Fig. 2, is a longitudinal sectional view of the metallic tube showing the same before the union with the stick of abrasive substance. Fig. 8, is a longitudinal eleva- Patented Mar. 29,1910.

tion of the stick of vitrified abrasive material before its insertion in the metallic holder. Figs. 4 and 5, are cross sections on the lines a a and b b of Fig.1."

In a detail description ,of the invention, slmilar reference characters indicate corresponding parts.

The abrasive substance is first formed and is baked to the proper vitrified condition before it is incased. The form of the material is that of a stick 2 which is tapered throughout its length from one end to the other; the tapered form of the stick of vitrified abrasive substance is essential aswill resently appear. The holder for this vitri ed stick of abrasive substance essen; tially conforms to the same tapered shape and'consists of a metal tube 1 which is formed of sheet metal, preferably block tin or such other metal having the requisite strength to withstand the force applied tothe stick of abrasive-substance when the latter is inserted in said tapered holder. The, stick of abrasive substance is formed sub'- stantially as shown in Fig. 3 andlis in that condition subjected to the requisite amount of heat to produce one homogeneous stick of material. The stick so form'edis placed in the tapered holder and theinecessary pressure is exerted longitudinallymn' the larger end of the stick to drivefthe same into the tube in a wedge-like manner-until the tube andthe stick are most -fir mly and rigidly united. After the stick of abrasive material I is so firmly and-rigidly placed within'the tapered holderythewooden handle'3-is inserted in thelargerend of the holder and.

umtedthereto. The smaller-end of the stick of abrasive substance projects out of the smaller end of the holder, and as the said end Wears away by contact with the emery wheel, the end of the metallic holder is likewise Worn away by the grinding operation or it may be removed by cutting the same to expose the end of the abrasive material.

It will be understood that the tool is serviceable for practical purposes as long as there is sufiicient length to it. It will therefore be seen as the working end of said tool wears away, the abrasive stick becomes of greater diameter and is thus suitable for iipplication upon larger emery wheels. As

on initial condition, the working end thereof is comparatively small as compared with the larger portions of the body of the tool, therefore the tool is adapted for dressing the smaller emery wheels until its length is reduced to the larger diameters when it becoms suitable for dressing the larger wheels.

This obviates the necessity of constructing different sizes of'tools', as it will be apparent from the foregoing description.

It will be understood that the abrasive material consists of any of the well-known materials, and a suitable binding by which the grinding material is solidified.

as the tool remains substantially in its esaaes Having described my invention, I claim:

1 1. An improved article of manufacture 'lcomprising a dressing toolconsisting of a ing material is compressed after fusing, the fusing point of said tapered stick of abrading material being ata degree of heat which exceeds the melting point of the metallic casing.

comprising a dressing tool consisting of a stick of fused abrading material of tapered form, and a sheet metal casing of similar form inclosing said tapered stick of abrading. material and wlthin which tapered metal casing said stick of fused abrading material is compressed after fusing, and the larger end of said metallic casing having a handle portion fixed thereto.

In testimony whereof li aflix my signature, in presence of two witnesses.

CHARLES H. STEPHAN;

i Witnesses:

MATTHEW SmBLEr CAROLYN M. THIEUBALD.

2. An improved article of manufacture I

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