US2087105A - Buffing wheel section - Google Patents

Description

July 13, 1937. E. w. HALL BUFFIG WHEEL SECTION Filed May 28, 1956 Patented July 13, 1937 UNITED STATES PATENT OFFICE l V l 2,087,105 BUFFING WHEEL SECTION Elisha w. 1mi, Scituate, Mass. Application May 28,1936, serial No. sazia .5 claims?, (ci. sl-lss) This invention relatesto rotary abrading tools of the class in-which' the abrading is done by the peripheral surface of the tool, and is more particularly concerned with a tool of the laminated typecomprising a series of layers of yielding abrading material such as cloth. The inven-I tion is especially concerned with a builing wheel section intended to be assembled with other like sections on an arbor, and clamped together by and between clamping plates and nuts threaded onto the arbor to force the sections firmly together.

In the use of a buiing wheel of this class, the

character of the work determines the linear speed of cloth, the waste of material is considerable;

25 Sometimes, the user attempts to sell the sections of reduced diameter to another user whose requirements call for a lower linear speed, but usually, also such other users requirements call for the use of a much finer grade of abrasive ma- 0 terial on the cloth. If,` therefore, the wheel section in the hands of the iirst user was treated with a coarse abrasive, it is unsafe for later use calling for a fine. abrasive because some of the coarse abrasive remaining on the cloth is likely 35 to scratch; the work.

y To obviatethese objections, my invention con- [templates assembling layers of cloth of the full /area of the disk, sewing these together from a 'point near the center to a point near the pe- 40' riphery, then punching out a circular piece'which can be sold for use in a small diameter bumng wheel, and using the remaining, large diameter ring in making up a wheel section in which the ring is attached to a central disk which may be 45 made of relatively inexpensive material such as chip board. The assembly and the attachment' of this disk to the cloth ring is accomplished .without the use of metal which is regarded as dangerous in a bufilng wheel, and yet the construction 50 is such. that there is a positive driving 'connection between the disk and the ring, and there is no need of using clamping plates of large diameter,

in fact, plates having a diameter muchlessthan v. the diameter of` the centraldisk of the wheel 55 section may be employed.

'I'he invention will best be understood by reference to 'the following description of a wheel section embodying the invention, while its sco-pe will be pointed out more particularly in the appended claims.

In the drawing:

Fig'. l is an elevation of a wheel section ernbodying the invention, with certain parts broken away, the better to illustrate the invention;

Fii. 2 is a sectional view on an enlarved scale on line 2-2 of Fig. 1;

Fig. 3 is anelevatlon,` at a reduced scale, .illustrating a laminated cloth disk whose layers' are sewed together in readiness for punching out its f central portion; A

. Fig. 4 is an elevation, also at a reduced scale,

illustrating the 'cloth ring with its internal, circum-ferential margin` prepared for attachment to the central disk; and v Fig. 5 is a sectional` view, also at a reduced scale,

illustrating the mode of assembling the central disk with the cloth ring.

Referring to the drawing'and to the embodiment of the invention illustrated therein by way of example, and having reference at rst' to Fig. 3, there is shown a disk I0 composed of a plui rality of layers I2, of cloth firmly united by stitching'them together, as for example, by stitches I4, which may be and herein are arranged in the center to a point near the periphery. The next ing a ring I6 (see Fig. 4) of suitable dimensions v for a large diameter wheel. The disk removed from the center may then be sold for use as apart of a small diameter wheel.

The resultant ring I6 is to be attached to a disk I8 (see Fig. 5) preferably of relativelyy inexpensive material such as what 'is known as chip board whose cost is about one eighth of the cost of an equal bulk of cotton cloth. This chip board is usually made of inexpensive raw material such as corn stalks made into thin sheets several of which are built up vto provide the desired thickness of lthe disk,in this case approximately the thickness of the ring I6. The layers of chip board are adhesively secured'together as by silicate of soda and constitute a firm, unitarybody. I

i The best Way now known to me to attach the ring I6 and the disk I8 together, so that the latter will drive the former, is to cut the ring to provide notches alternating with teeth 22,

and to cut the disk I8 to provide corresponding step is to punch out a central, circular area, leavfio teeth 24 to lit into the notches 20, and so that the disk can be assembled with the ring by rela'- tive axial movement (see Fig. 5). Thus it will be evident that the disk and the ring, Vof /substantially equal thickness, are interlocked between their faces so that relative rotationgis impossible, and yet Without the use of '/rnetallic fastenings which are regarded as dangerous because they are likely to break and fiy out of a wheel.

Either before or af ter assembling the disk and the ring, the inner margin of the latter is preferably treated with latex which makes it firm and facilitates the sewing which is to follow and which will presently be described. To hold the disk and the ring against relative axial movement after they have been assembled, two disks 25 of appropriate material such as canvas are applied to opposite faces, respectively, of the central disk I8, and the diameter of the canvas disks is sufiicient so that they overlie the ring I6 to a substantial extent, they cover the interlocking teeth and notches, and there is sufficient overlap to enable the canvas disks to be secured to the intervening portion of the ring I6, as by stitches 26. Also, if desired, a row of stitches 30 may be placed about a central opening 32 for the spindle, though these stitches are not at all necessary and may be omitted if desired.

Preferably, before applying the canvas disks, they are coated with latex to make them adhere firmly to the central disk and to the ring, and the assembly is placed in a press under high pressure for a short time before proceeding with the stitching. Finally, to avoid exposure of the stitches to wear which might occur in the event of accidental relative rotation of sections, I prefer to apply protective disks 34 of cotton cloth adhesively secured, as by animal glue, to the outer faces of the canvas disks, the diameter of the protective disks being, of course, sufficient to cover the stitches l26.

The wheel section is now complete and may be assembled with other like wheel sections on an arbor and clamped by the usual clamping plates and nuts, vusing relatively inexpensive, small diameter clamping plates With the full assurance that the interlocking of the central disk and the surrounding ring is sufficiently strong to transmit the power. To resist any possible tendency of the ring to expand radially and to interrupt the interlocking, driving connection, the teeth 22 and 24 may be and herein are given a dove-tail formation as shown in Figs. 1 and 4.

Having thus described one embodiment of the invention but Without limitingmyself thereto, what I claim, and desire by Letters Patent to secure is: 1. A builing wheel4 section comprising, in combination, a central disk having a hole for a shaft and a continuous, unitary ring about said disk and vcomposed. of a plurality of annular layers of fabric, said disk and said ring being provided, each with alternating teeth and notches, the teeth of one being received in the notches and arranged for assembly and disassembly by relae tive axial movement of said disk and said ring, and fibrous retaining elements applied. to opposite sides of said disk and ring along said teeth, and notches Iand secured to said disk and ring.

2. A bufling wheel section comprising, in combination, a fibrous central disk having a hole for a shaft, a continuous, unitary ring about said disk and composed of a plurality of layers of fabric disposed in planes perpendicular to the axis of said disk and ring, said disk and said. ring being provided with mutually interengaging teeth and notches, one set on the outer, circumferential surface of the disk, and the other on the inner, circumferential surface of said ring, and arranged for assembly by relative axial movementof said disk and said ring, and fibrous retaining disks applied to opposite sides of said disk and` ring and overlying said teeth and said notches.

3. A bufng wheel section comprising, in combination, a fibrous central disk having a hole for a shaft, a continuous, unitary ring about said disk and composed of a plurality of layers of fabric disposed in planes perpendicular to the axis of said disk and ring, said disk and said ring being provided with mutually interengaging teeth and notches, one 'set on the outer, circumferential surface of the disk, and the other on the inner, circumferential surface of said ring, and arranged for assembly by relative axial movement of said disk and said ring, second brous retaining disks applied to opposite sides of said disk and said ring and overlying said teeth and said notches, and fastening means extending through said retaining disks and through said ring, radially outwardly beyond said teeth and said notches.

4. A bufiing wheel section comprising, in combination a fibrous central disk having a hole for a shaft, a continuous, unitary ring about said disk and composed of a. plurality of layers of fabric disposed in planes perpendicular to the axis of said disk and ring, said disk and said ring being provided with mutually interengaging teeth and notches, one set on the outer, circumferential surface of the disk, and the other on the inner, circumferential surface of said ring, and arranged for assembly by relative axial movement of said disk and said ring, fibrous retaining disks applied to opposite faces of said disk and ring and overlying said teeth and f notches, stitches extending through and fastening said layers together, stitches extending through said retaining disks and said ring radially outwardly beyond said teeth and notches and fibrous protective disks applied to the outer faces of said retaining disks and overlying the last-named stitches.

5. A builing wheel section comprising, in combination, a fibrous central disk having a hole for a shaft, a continuous, unitary 'ring about said disk and Icomposed of a plurality of layers of fabric disposed in planes perpendicular to the axis of said disk and `ring, said disk and said :ring being provided with mutually interengaging teeth and notches, one set on the outer, circumferential surface of the disk, and the other onthe inner, circumferential surface of said ring, and arranged for assembly by relative 'axial movement of said disk and said ring, fibrous retaining disks applied to opposite faces of said disk and ring and overlying said teeth and notches, stitches extending through and fastening saidlayers together, stitches extending through said retaining' disks and said ring ra- ELISH W. HALL.

.Patent N. 2,087,105.

' (Sea1)ry ,l

ELISHA w. HALL.'

It is xhereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page second Column, line 25, claim 3, strike ont the Werd "second"; and that the saidLetters Patent' should Vbe read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed Aand sealed this 21st day of September, -A. D.'- 1937.

AHenry Van Arsdale Acting Commissioner of Patents.

July 13, 1937

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