US2108966A - Buffing or polishing wheel - Google Patents

Description

Feb. 22, 1938. w, HALL 2,108,966

BUFFING OR POLISHING WHEEL Filed Jan. 29, 1937 2 Sheets- Sheet 1 4 10 /0 l6 8 /0 as /0 8 8 l6 /4 EJ834 20 WHaZZ, by $24 :FM m ramm- Feb. 22, 1938. w HALL 2,108,966

BUFFING OR POLISHING WHEEL Filed Jan. 29, 1957 2 Sheets-Sheet 2 fez/118223021- Eit'sfia WHaZZ, y JJ'PFWX, m r W Patented Feb. 22, 1938 I Q I l v v UNITED STATES PATENT OFFICE 2,108,966 BUFFING on POLISHING WHEEL Elisha w. Hall, some, Mass.

Application January 29, 1937, Serial No..-12z,az5

4 Claims. (01. 51-19:)

This invention relates to bumng or polishing ally in the form of a spiral. Each section is prowheels of the type in which the wheel comprises vided as usual with a central hole llto receive a plurality of sections, each composed of a pluthe usual shaft or spindle to which it is cusrality of piles of flexible fabric usually stitched tomary to secure the wheel by clamping plates 5 together. In accordance with the present inand nuts. 5

vention, the sections are joined together by ad- The sections are prepared for assembly by coathesive at areas separated in a radial direction by ing them with an appropriate adhesive at areas areas not joined by adhesive and having a conseparated in aradial direction by areas not joined siderable degree of flexibility in a radial direcby adhesive. In the present example, the coated tion under the pressure of the work applied to areas are annular zones ll, l6 and I8 and they 10 the periphery of the wheel. Thus, although the alternate with uncoated, annular zones 20, 22 wheel has a desirable firmness and the sections and 24. The sections are then assembled face to will not spread apart as in the case of sections face coaxially and the assembly is placed in a wholly unattached, nevertheless the wheel possuitable press, preferably hydraulic, by which sesses the requisite degree of resiliency in a rathe wheel is subjected to tremendous pressure 16 dial direction under the pressure of the work. until the adhesive has set and the sections are In other words, there is a cushion effect without thus strongly united. While .glue may be used undesirable, unlimited spreading of the sections, as the adhesive, best results areattained by the which characterizes a wheel in which the secuse of latex which is preferred because it does 20 tions are wholly unattached. Each zone in which not become hard and brittle and does not score 20 the sections are unattached is resiliently yieldthe work. Latex is also preferred because it re-' able in and of itself, and this characteristic is tains a considerable degree of flexibility as compreserved throughout the life of the wheel, bepared with animal glue. When this flexibility cause, as the wheel wears away there are still and freedom from scoring of the workare not other alternating cemented and uncemented important, animal glue may be substituted. 25 zones. The resulting wheel is characterized by the The invention will best be understood by refersecure attachment of its sections together with ence to the following description when-taken in freedom from relative rotation and from undue connection with the accompanying drawings spreading of the sections under pressure of the '30 illustrating one specific embodiment: thereof,. work, combined with a desirable degree of re.- while its scope will be pointed out more partieu-- silient yielding, locally in a radial direction due larly in the appended claims. to the fact that the unattached areas can flex In the drawings: a v V with comparative freedom, as shown at the left- Fig. 1 is an elevation of a buffing-or polishing hand side of Fig. 4. It is difllcult in a drawing wheel embodying the invention; to represe'nt precisely how the flexing occurs in 5 Fig. 2 is a sectional view on line 2-2 of Pig. 1 a rapidly rotating wheel,' but it isv characterized showing the wheel as it appears with no presby local compression radially and corresponding sure applied to its periphery; lateral expansion or widening of the unattached Fig. 3 is an elevation of one of the wheel sec-- areas, so that the effect at the periphery where 40 tions with rings of adhesive applied thereto; the work is held is somewhat analogous to the 40 and Y local yielding of a pneumatic tire in contact with Fig. 4 is a sectional view similar to Fig. 2, the ground. but illustrating the local yielding of the wheel Having thus described one embodiment of the in response to pressure applied in the .direction invention but without limiting myself thereto, of the arrow tov the periphery of thesvheel. .what I claim and desire by Letters Patent to 45 Referring to the drawlnss and to the embodisecure is: ment of the-invention illustrated therein by way 1. A bumng or polishing wheel comprising, in of example, and having reference at first to combination, a plurality of sections each com-- Figs. 1 and 2, there is shown a bufling wheelprising a plurality of piles of flexible sheet fabric comprising a plurality of sections each comprisstitched together, said sections being joined to- 50 ing a plurality of plies I of flexible fabric such gether by annular Z n of le hesive at as woven, cotton cloth whose thickness is greatareas separated in a radial direction by areas not ly exaggerated, the piles shown being simply flat joined by adhesive and having a considerable dedisks stitched together by threads ll, herein gree of flexibility in a radial direction under arranged, for example as shown in Fig. 1, generpressure applied to the periphery of the wheel. 55

together by latex at areas separated in a radial direction by areas not joined by latex and having a considerable degree of flexibility vin a radial direction under pressure applied to the periphery oi the wheel.

4. A bumng or, polishing wheel comprising, in combination, a plurality of sections each comprising a plurality of plies of flexible sheet fabric stitched together, said sections being Joined together by latex along annular zones separated by annular zones not joined by latex and having a considerable degree of flexibility in a radial direction under pressure applied to the periphery of the wheel.

ELISHA W. HALL.

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