US1504272A - Buffing wheel - Google Patents

Description

Patented ug, l2, lgdlm CHARLES l?. SCHLEGEL, OF ROCHESTER, NEW YORK.

BUEFING WHEEL.

Application led January 12, 1921.

To all whom t may concern.'

Beit known that I, CHARLES P. SCHLEGEL, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Bufling Wheels; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the aon companying drawings, forming a part of this specification, and to the reference numerals marked thereon.

My present invention relates to buifing and polishing and more particularly to buffing and polishing wheels such as the soft wheels ordinarily made of laminated fabric stitched together and run at high speed with the application of an abrasive thereto to clean and polish metal surfaces and the invention has for its object to provide a simple, cheap and efficient wheel of this general nature which will have greater wearing qualities than. those heretofore provided and which will present the: fabricated material. to wearing contact with the work in a manner most effective to obtain a maximum of bufiing or polishing surface from a given amount of fabric. 'Io these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure l is a side view of a bufiing wheel constructed in accordance with and illustrating one embodiment of my invention;

Figure 2 is a section on the line 242 thereof, and

Figure 3 is an enlarged view of a portion of the specially woven fabric that I prefer to use, the same being shown in the process of weaving.

Similar reference numerals throughout the several views indicate the same parts.

To first give a general idea of the novel features of my invention, I provide a wheel consisting of a multiplicity of threads A. all of which are radial to the center of the wheel and are held together by a plurality of circular rows of relatively transverse threads B all of which are part of a continuons strip of fabric woven in a spiral form so that it may be coiled to provide a wheel as thick as may be desired, the convolutions being superposed as'indicated at C, C', C2, @E in Figure 2 and the opening 'D serial no. 436,773.

being formed at the center for the reception of the shaft and head clamp.in the usual manner. The ends of the spiral strip shown in Figure 2 are preferably stitched down, or fastened in any desired or convenient manner.

Ordinarily, in the manufacture of buffing wheels of this kind a number of plies of heavy cotton fabric of simple weave are si"mvply stitched together, cut into circular form and a hole punched at the center. The warp and weft threads of the fabric being at right angles, they are each substantially radial at certain points in the circumference within very limited sectors, while at other points they run tangentially or substantially so. These tangential threads present their sides instead of their ends at the wearing `perimeter of the wheel and hence ravel quickly and great lengths of them drop from the wheel intact and before they have had an opportunity to give any substantial polishing eifect. The few threads that are ra dial are properly disposed to give their maximum wearing effect, their ends engaging the surface with a lateral brushing contact that ultimately consumes them in useful wear, but these threads are relatively few in proportion to the number actually present in the whole wheel. Furthermore, such a wheell does not present a uniform buliing perimeter but one in which the density of the fabric fibers varies noticeably at successive points on the circumference.

With my wheel, the threads being all radial as presented at the perimeter, they are all worn down endwise and give a brushing sort of a polishing surface in which the fibers are of an even density. In constructing it I provide a plurality of warp threads l, 2, 3, 4, 5, 6, 7, and 8 as shown in Figure 3, which threads become the transverse binding thread B of Figure 1, except that the outer warp 1 has been trimmed off in that gure. In the order named, these warp threads are progressively longer than onel another toprovide the circular bindings B of the relative proportions shown in Figure 1, so that the last mentioned thread 8 is only as long as the circumference of the shaft or of the central opening l), while the outermost one 2 in the completed wheel is nearly equal to the circumference of the wheel. This is due to the weaving method shown in Figure 3 whereby the weft threads a, l), 0, d, e, f, g, become the radial threads A as first lmentioned. By this method, the Weft thread a picks up the Warp 8, the weft thread the Warp 7, the weft thread c the Warp 6, and so on, so that st-arting from the full Width, the weft threads are progressively shorter according to the distances between the Warp threads until the final weft thread g extends only betiveenthe warps 1 and 2. Suchrgroup of weft threads is then repeated, the next one extending the full Width of the cloth to 8 and so on. The comb of the loom' Which has operated upon the two groups of vveft threads at the left of Figure 3 but not upon the group at the right, packs these threads together along the line of contact normal to the Warp threads as they lie in the loom but at an angle to them as they pass on to the Winding or takeup roll so that each group of weft threads constitutes a segment of the circular Wheel and gives the spiral form to the Woven strip as it leaves the loom. Each weft thread lies substantially radially and the shorter ones fill in the spaces that would otherwise be left'betvveen the truly radial threads a that run all the Way to the center.

With this formation of the iveft a special Winding-off mechanism is provided on the loom inasmuch as the side of the fabric strip containing the Warp 1 is longer and must be taken up faster than the side Constituted by the warp 8 but this is a separateinvention of mine not necessary to this explanation.

As before mentioned, the selvage in the region of the Warp 1 is preferably trimmed off as sho-Wn in .Figure 1 When the VWheel is formed or before it is put into use, although, of course, it would ultimately Wear off. Obviously, Wheels of greater or less body or thickness can be made by using long or shortrstrips of the spiral fabric; thus indefinitely multiplying the number of convollutionsror plies and it is obvious that variations from the particular Weave shown may be restorted to to alter the density of the fabric and also the number and character of the circular or Warp threads may be varied. I refer Vto threads in a broad sense as meaning fine strands of any material suitable for making rotary buffers and similarly by ar Woven fabric I intend to refer to one in which the strands are interlaced, Whetherthey are made on a loom or are knitted or stitched.

1 I claimas my invention:

1.,- A circular one-piece Woven fabric buffing 'Wheel in Ywhich all of the Weft threads are arrangedr radially in the same plane.

2. A circular one-piece Woven fabric buffing Wheel` in'whieh all of the Weft threads areV Aarranged radially in the same plane and the. Warp threads circularlv.

3. A circular Woven fabric batting. Wheel embodying a multiplicity 0f radial threads arranged side by side throughout the circumference of the wheel and varying` progressively in length in the pla-ne of the Woven fabric.

4L. A circular Woven fabric butliug wheel embodying a multiplicity of radial threads arranged side by side throughout the circumference of the Wheel and varying progressively in length in the plane of the woven fabricin combination with relatively transverse binding threads connecting the inner ends of the radial threads.

5. A circular Woven fabric bulfing wheel embodying a multiplicity of radial threads arranged side by side in uniform Igroups repeated progressively throughout the eircumference of the Wheel, the threads of each group varyingprogressively in length. in combination with relatively transverse binding threads circularly arranged to connect the inner ends of radial threads of like length.

6. A circular buiing Wheel embody-ing a continuous strip of fabric Woven iu the form of a helix.

'i'. A circular bufling Wheel composed of a continuous strip of fabric Woven in spiral form and Wound into superposed convolutions, the fabric strip embodying a long outer circumferential warp thread and progressively shorter inner circular warp threads together with repeated groups of weft threads, 'the threads of each group being of different lengths all extended from the outer Warp thread and terminating at the respective inner Warp threads, respectively.

S. A circular bufling wheel embodying a continuous strip of Woven fabric in the form of a helix, `the Warp threads being relatively shorter as they approach the center.

9. A circular bufling wheel embodying a continuous strip of Woven fabric in the form of a helix, the warp threads being relatively shorter as they approach the center and the weft threads being substantially radially arranged and of different lengths.

10. A circular builing Wheel embodying a continuous strip of Woven fabric in the form of a helix, the Warp threads being relatively shorter as they approach the center and the Weft threads being substantially radially arranged in groups, the units of Which vary progressively in length.

11. A rotary bufling Wheel embodying a Woven unit in which. the Warp threads are concentrically arranged with respect to the center of the-Wheel and relatively shorter as they approach said center.

12. A bufling Wheel having` a body composed of radial threads and relatively transverse binding threads interlaced therewith in concentric circles about the center of the wheel.

.- CHARLES P. SCHLEGEL.

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