US2522094A - Buffing wheel - Google Patents

Description

2 Sheets-Sheet l G. R. CHURCHILL BUFFING WHEEL Sept. 12, 1950 Filed April 29, 1948 INVENTOR. GEORGE R- CHURCH/L1.

ATTORNEY.

BUFFING WHEEL Filed April 29, 1948 2 Sheets-Sheet 2- ATTORNEY.

Patented Sept. 12, 1950.

UNITED STATES PATENT OFFICE Y IBUFFING WHEEL George It. Churchill, Hingham, Mass.

Application April 29, 1948, Serial No. 24,059

43 Claims.

This invention relates to a buffing wheel.

suction developed when the work is held up against the face of the wheel thus effectively cooling the adjacent sections of the wheel.

With these objects in view and such others as may hereinafter appear, the invention consists in the buffing wheel and in the spacing and aircooling disc for use in a buffing wheel, all as hereinafter described and particularly defined in the claims at the end of this specification.

In the drawings illustrating the preferred embodiment of the invention, Fig. 1 is a side elevation of the present buffing wheel; Fig. 2 is a vertical, cross-sectional view of the present buffing wheel illustrating in section the spacing members between adjacent wheel sections of the buffing wheel; Fig. 3 is an end elevation of one of the preferred spacing and air-cooling discs and Fig. 4 is a detail to be referred to.

Prior to the present invention various attempts have been made to air-cool bufiing wheels of the multi-section type and such attempts have been confined to the conduction of air axially through a hollow supporting shaft or arbor and the distribution of the air outwardly between adjacent sections. This required specially constructed arbors and special spacing members between the sections.

I have discovered that a multi-section buffing wheel may be successfully air-cooled by the use of specially designed spacing members, disposed between adjacent sections of the wheel without any special arbor. The spacing members are constructed to permit the passage of air'from one portion of the surface of the buffing wheel through the spacing members and to permit the air to thereafter emerge at a different portion of the buffing wheel surface. The air movement is actuated by the vacuum set up when the work is held against one portion of the face of the wheel. It is my belief that when the work is held against the front face of the wheel, an area of low' pressure is set up in such a location by reason of the rapidity by which the wheel is rotated and the distortion by the work of the rapidly revolving body of air in contact with the surface of the wheel, thus producing an area or region of low pressure at the front of the wheel. The provision of the especially constructed spacing members between adjacent sections of the buffing wheel makes it possible to utilize this region of low pressure to effect air movement through and between adjacent sections from one portion of the face of the bufiing wheel to the'second portion of the face of the buffing wheel in the vicinity of the region of low pressure, with the result that a definite flow of cool air is caused to take place between adjacent sections thus effecting efficient air-cooling of the wheel.

Referring now to the drawings, the multisection buffing wheel shown in Figures 1 and 2 is made up of a plurality of sections it, mounted upon a supporting spindle or hub l2 and clamped under pressure between end plates [4 by a nut threaded onto the threaded portion of the end. of the spindle. One of the end plates I4 abuts an; end of the rotary element upon which the spindle" is mounted. The wheel is further provided with.

a plurality of spacing members 20 of novel construction which are mounted upon the spindleor hub l2, one between each pair of adjacent buffing wheel sections. The spacing members are constructed to provide an air conduit through which the air may flow from one or more portions of the periphery of the wheel to emerge between adjacent sections at the front of the wheel, the movement of the air being induced by the region of low pressure set up at the front of the Wheel when work is held against the face of the wheel during the normal commercial use of the wheel.

The spacing members 20 are preferably provided with portions which effectively space apart adjacent sections of the wheel to permit such air movement and as herein shown each facing member preferably takes the form illustrated in Figures 1, 2, and 3. As therein shown, each spacing member is provided with a rim portion 22. engaging the side of the buffing wheel section and spacing the same from the next adjacent section. These spacing members 20 are provided with a central hole adapted to snugly fit upon the central spindle l2 on which the buffing wheel sections are mounted.

In the preferred embodiment of the invention, theindividualbufiing wheel sections it are preferably made in accordance with my U. S. Letters 3 Patent No. 2,146,284 issued February '7, 1939. As set forth in said patent, each section comprises a plurality of individual cloth bufling elements H arranged to extend radially and the inner and lower ends of which are secured in ring formation by weaving wires 42 extending around and between successive bufling elements. The ring of boiling wheel elements thus formed is stapled or otherwise secured to a central hub or supporting plate 26, preferably of sheet metal'an'd: towhich the individual members may be securedby staples 21, as shown. The illustrated Spacing member 20 is particularly designed for use with a bufiing wheel section of the type described and'which is illustrated in my patent as aforesaid. As illustrated in the drawings, the rings'ectionof'the bufiing wheel spacing member is provided with an annular shoulder or offset portion 29 disposed to fit snugly under the inner ends of the -ra'di-ally extended bufiing wheel elements Ii and the cen- -t tral-portion of the j spacing plate or disc 20 is dished: into the shapeillustrated inFigs. '2 and 3 vso as tov'provide and form anair chamber-ill --between:one face of thedisc and the adjacent -metal"plat'e 26.: Thespacing member 20 is further; 25 therimsectifin f said-spacin embers. providedwith a series of eircumferentially-spaced wslotsoinopenings-tt 'which are formed-in the :shoulder and rimmed portions 29; 22 of the spaclug-discs, asillustratedin'aFigures l and 2 thus 3| formedbetweentheconcave face ofthe-spacingdisc and th metal plate l26 of-the particular :wheelsection. :Thexthickness -or depth of the .lspacing members lei-related to the sizeor -deptlr f thewends ofzthebufiing elements-zconstituting the sectionof the'buiiing wheelso as-to provide at all times a space under theispacing'members through which air ana'y flow radially outwardly during thenoperation of the:wheel under -the H .influencezof the 'IGgiOH oi low pressureaboveto centel""and"support bufimg rings referred to, thus 1 providing a continuous air-paswheel section so that when engaged-b3 the rim -portion'of the'spa'cing memben ampleair-space is insured-between b'oth 'surfacesoftherim sec- -tion-of thespacingmember sothat effective distribution ofthe air is accomplishedirrespfitive "'of theamount of pressure with which thewlieel sections are clamped together.

4 embodied in other forms within the scope of the following claims.

Having thus described the invention, what is claimed is:

5 1. A multi-section buffing wheel comprisin a plurality of bufiing wheel sections, a spindle on which said sections are mounted and a plurality of spacing members between adjacent sections, each of said buffing wheel sections including a fiflatcircu-lar plate mounted-on the spindle and aring ofradially-exte'hded buffing elements secured at their inner ends to one side of said plate and terminating a substantial distance from said wspindle, said spacing members being provided 5 with rim portions engaging the opposite lateral face-oflthe inner end portions of said radially Mextendedibufiing elements and provided with a central portion disposed Within the circular open- --ing i-ormed by said ring of bufiing elements and shaped to form an air chamber between one face of the spacing: member and the supporting plate of: an adjacent buiiing wheel sectionysaidspacing 1-members=beingalso provided with air ports for conductingiair into and-from the air chamber at 2. Albuiilngwheel as defined in-claim 1 wherein the spacing members are providedwith an oiiset portion disposed 'to fitunder-"the innerends of saidabuffingelementsand wherein-the ports are fi rdi direCt-p air passagehinto theHcha-mbei formed-in-the rim and offset portions of the-Spac- -ii1g members.

3. A multi-sect-ion buffing wheel having aplurality of sections and means for operatively supporting the sections upon a spindle; said sections comprisingannular bufi'ingrings and said supporting means comprising flat=centering disks, one-secured" toeach ring alongione lateral face adjacent the inner diameter of said-bufiing rings and-through which the spindle is arranged to thereon, a plurality of detached spacing disks mounted upon the spindle with one disk between adjacent-ringsections, each of said disks having ofiset rim vportions arranged to-engage the opidpositerlateral face of-said ringsand havingportions: disposed within the central opening formed withinwsthe annular -bufiingrings-- and being shaped to form a substantial air chamber dis- -posed-between--the=-face of said spacingdisk remote fromthecentering disk andthe' next adjacent buffing section, said spacing disks having airports formed in -the rim portion thereof and communicating withsaid air chamber to permit passage of air from one portionof the peripheral dance ofthe bufiing wheel to another. portion I thereof.

4. A multi-section buffing wheel havinga pluralitylof annular'ringsections, each section hav ing a fiat circular plate secured-to a-laterabface In Fig. 4, I have illustrated avertical sectional a tt i ner diameter of a section for; su

view of adjacent sections of adifferent type of bufiing wheel; with which the present spacing members 2llmay be used'with advantage. As shown each section is made of a plurality'of' full discs of cloth mountedupo Spindle'l2 and a portion engaging the opposite lateral face adja- "spacing ring 40 of cloth, cardboardorothersuitablematerial' may besewn or other'wise'se'cured toone face o'f'the section against which the rim porting the sections upon and spaced from a spindle, means separate from said supporting means forv spacing adjacent sections from one another comprising aspacing disk having arim cent the inner diameter of said ring sections and shaped to provide a substantial air chamber between a face of the. spacing disk remote fromsaid supportingplate and the adjacent bufling wheel engage in ordertoprovide the desiredair ch'am- 'section and being provided at'the-rim portion "ber' '3I"'beneath'-the' body portion of'thespacing "disc.

While the preferred 'embodiments'of the inven- 'tion have been herein illustrated "and described, it will be understood"that-theinventionmay'be..=75"o f thew/heel, movement of air is inducedfrom ther'eof with a plurality of circumferentially spaced openings constituting air ports, said air "ports communicating with the fair chamber "whereby when-the'work is held against the face one portion of the wheel into said air chamber to emerge through said ports at another portion of the face of said wheel to efiect cooling of the Wheel.

5. A multi-section bufiing wheel as defined in claim 4 wherein the supporting plates and the ring sections are provided with securing means having portions which extend between the plates and said rim portions providing additional space to insure the free passage of air between the sections and around the hub portions of the spacing members when the sections are clamped together on the spindle.

6. A multi-section buffing wheel comprising a plurality of sections mounted upon a spindle, and a plurality of spacin disks, one between each pair of adjacent sections, said spacing disks having offset rim portions provided with air ports and engaging a lateral face of a section, the inner portions of the disks being shaped to provide an air chamber of substantial size between one face of each disk and an adjacent section communieating with said ports to permit the conduction of air from the peripheral face of the wheel,

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 20 1,573,961 Zucker Feb. 23, 926 2,136,747 Levoy Nov. 15, 1938 2,140,208 Murray Dec. 13, 1938 2,182,952 Todd et a1 Dec. 12. 1939

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