US2573874A - Ventilated buffing wheel - Google Patents

Description

\ NOV- 5, 1951 v. RICHARDS 2,573,874

VENTILATED BUFFING WHEEL Filed sept. 22, 195o Patented Nov. 6, 1951 lmuren munir @forel-CE v 'VENTILTED BU,lllliING'YVHEEL.v '-VctorL-loyd.Richards, Toronto;lOntarofCanada,

' assignonto Ganadian Hanson andfVan-.Winkle "CompanyrLimited; Toronto, Ontario, Canada, a

cOrpOrationoGanada n n ApplicationSeptenber 22,1l=1950;-`Serial-No. 186,133

'In' Canada J anuaryf7, 1950 3 .Claims This invention 'z relates? .to buing -Wheels .f and i inf-particular tol ventilated Ibufing wheels. f

Ein the use ofvbufng wheels for nishing-'andlor :polishing articles, A:theubulling wheel ;isirotatediat .it v.by .the operator :with .such pressure Las. may

be requiredtoxproduce the zdesiredzresult. :A suitable ,abradant-v orxpo'lishing i material usually H.intermin'gle'd with -a/.suitable Acarrying "Vehicle,

:- such. as Laflubricant, is generally. applied tothe zperiphery: ofY the fwheel. The;y friction .produced Lby the. Contact `ofV the rapidly rotatingperiphery l`of theiwheel .with the work producesv very consid- .ierable lheatfwhich insome `instances vis sucient 'toschar the flbresrfof Athebuiling material atthe r of the bu'fng wheel are so closely lclampedfto- `V4gether between.- .collars *upon -the shaft 4that 11a suiciently lrapid circulationl -of -airis` not *obtained to accomplish the' desiredresult.

The f cooling `of buing-wheels 'has also'been ac- -complished loymeans disclosedin- United States Patent No.A 1',922,l08,'now Reissue '19' ,894, iniwfhi'ch the buiing wheelV comprises aseries -oi annular Avvbuff'ng units which--are gathered-:at their -inner --edges to produce radially extending folds I'-or ridges the-"inner` circumferencepfthe'annular i =buiiingY strips Vbeing held Iby4 av ring-shapedy metal binding strip having toothed edges 1'bent' inwardly toward each other so as to 'clam'pf'the *layers of cloth together, the rings bei-ng "also jprovided with legs-or-projections lwhich `in 'the assembled wheelseparate the units from'each other and provide radial passages'betweenfthem for the air coming from the ventilate'dsupporting hub or center. InV this vconstruction also` the annular strips or layers 'off'buiing'materialrare 4provided at intervals with `aligned apertures tween the sections at the peripherylof thebuiiing An improvement over-the bu'ting'- wheel feo-nstructionof'United StatesPatent No. 922,108 'is described inU-nited States-PatentlNoJ 23402268.

A,aligned "apertures and the ringeshaped-.anetal .binding strip has `no legs or projections to'sepalratevtl-ierbuiing units from'each'other. There provided .instead a ventilated supporting: .hub 'f5 -or centeriwhich hasa peripheral flangefsupporting the-buing units and having .slots out? into .-.it sofas -todform .with the metal. binding strips y'radialpassages between the units for the;air vcomingqfrom the hub for center.

The particular` constructions described in the vlast two :mentioned patents vhaveV several disf advantages. The .spaces-orv hub is designed for use with the one particular bufling 'unit 'or/:at rleasta buff Vec'lgedwithssteel. :Thus other types 15-of=ibus cannot rbe usedutofadvantage With this vhub. In addition,.the .annular clamping rings are .likely to be .broken'whenthe1wheel:is;'run

at high speeds and when so broken will beprojectedoutwardly with Igreat force, thereby' en- 20- dangering the operator*` to seriousinjury.

In United States application Serial No. 62,739, :frledzonNovemberO,1948, in the name'of Vctor L. Richards, now United States Patent f No. ,2,526,420, aventilated buing wheel :assembly is described'f-which overcomes the foregoing disadvantages. 'This 4assembly comprises bufn'g units preferably formed of a plurality of pliesiof flexiblematerial and possessing yradial furrows and being reinforced near their inner edge'byfa -ring-.said ring' being .heldi in place and said'furrows beingiform'ed" by folding'and stitch-ng'gof the plies over-isaidring, and ventilatedsupportwing-chulas orrcenters :havingislots cut into their periphery together with a flanged'ring andfza `plain.annular Aring .attached .on oppositefsides of said periphery so as to support .the :bufilng omits :zandformwith said slots sa radial air passagebetween them. `Although this Ventilated buiiing lwheel `:asasembly .islalLdefinite improvement over the as- :.sembliesfof the @priorzart in that the hub' or spacer thereof providesradial airpassagesbetween the bu'ing lunits .independently of .the construction of' such 4units and isthus adaptable' .for use `with l various'ftypes-of -bulflir-igtunitsy it nevertheless has .sever'al disadvantages. For. instance, since `the '-'hub orspa'cer consists of three pieces which must befattached-togetherand the 'center .piece :must 'have .slots cut. into `its periphery; themanufacfture 'of this'hub `or .spacer requires rnu'chtime andexpense Ilfurthermore,l the radial air apas- 'fsages' -formed lby those. threeV pieces` are: of. 'such size as to be easily crushed by the'rpressurefexyeltd byf'the' latheespindle nuts ofthe tassernbly -"In the latter-'patentfthe annularstripsihave''no rp155C and-1eas`ilyiblocked by lint-and idirt. naddi- .www vm.. f,

tion, since the hub or spacer is smooth on both sides, there is a tendency for the bufng units to slip thereon thus causing frictional heat between the unit and the hub -or spacer.

It is an object of this invention to provide an improved ventilated bufng wheel assembly which has none of the disadvantages of the foregoing assembly while permitting the same suiciently free circulation of air to properly cool the bufng Wheel. Another object of this invention is to provide a spacer or hugb to be used in such assembly. Other objects of this invention will be obvious from the following description of the invention.

These objects are accomplished by providing a hub or spacer more or less in the shape of a flanged wheel, consisting of a disc having a plurality of radial utes stamped at intervals in its outer periphery and extending inwardly from the peripheral edge and a central aperture to receive a spindle and a plurality of perforations radially disposed with respect to said aperture to form axially extending air passages, and a flanged ring attached between the spaced radial flutes to one side of said disc adjacent the outer periphery and overlaying the flutes, thel depth of said ring from the outer edge to the inner edge thereof extending inwardly a smaller distance radially of said disc than the inward extent of said spaced radial flutes and thus defining with said flutes radial air passages. This hub or spacer is adaptable for use with various types of buffs butin particular with a buff possessing radiating furrows which are formed by folding a plurality of plies of flexible material cut on the bias over a ring and stitching in order to hold the ring in place and gather the plies into radiating furrows.

A particular embodiment of this invention may be described with reference to the drawings in which Figure 1 is a front elevation of the fluted disc of the hub.

Figure 2 is a sectional View of the fluted disc of the hub along lines 2--2 of Figure l.

Figure 3 is an enlarged view of the flutes of the disc.

Figure 4 is a front elevation of the flanged ring of the hub.

Figure 5 is a sectional View of the flanged ring of the hub along lines 5-5 of Figure 4.

Figure 6 is a front elevation of the hub.

Figure 7 is a sectional View of the hub along lines 1-1 of Figure 6.

Figure 8 is a front elevation of the preferred puckered bufling unit.

Figure 9 is a sectional View of the bung wheel assembly.

As is shown in Figures 1 to 7 inclusive the hub or spacer is made of two parts, a center plate or disc l and a flanged ring 2 appropriately fastened together, for instance, by spot welding. The center plate l is provided with a flanged central aperture 3 for receiving a spindle. In addition it is provided with a plurality of perforations 4, radially and uniformly disposed with respect to the central aperture 3. A plurality of utes 5 are stamped at intervals in the periphery of the central plate l and extend inwardly from the peripheral edge. These flutes 5 together with the flanged ring 2 form passages for delivering air outwardly from the central portion during the revolutions of the wheel.

Figure 8 shows the preferred buing unit which vis'formed of a plurality of plies 6 of cotton cut 4 on the bias and doubled along the solid steel ring 1 and gathered by stitching B in order to hold the plies in place and in order to form the radiating folds 9. The folds 9 together with the grooves 5 in the hub form the complete Ventilating passages.

Figure 9, which shows a sectional View of a bufng wheel assembly, illustrates how the buil"- ing unit fits over the flange of the hub or spacer.-

As in the other figures l indicates the central plate, 2 the flanged ring, 5 the flutes, 6 the plies of cloth, 1 the ring as stifening member in the buing wheel. The lathe flanges are indicated by I0 and aperture H in these flanges are designed to permit the entrance of air into the central portion of the assembly. Under operating conditions air is drawn into the centre of the assembly through the air passages formed by the perforations 4 and forced out through flutes 5 and furrows 9 to the periphery by the centrifugal force of the spinning buing Wheel assembly.

Although the buing unit which is preferred vis as described above, other types of buffs may be used with the hub or spacer which forms part of the invention. Thus the furrowed bufling unit described in U. S. Reissue 19,894 would serve. Even buffs possessing no furrows might be ernployed since radial furrows while advantageous are not essential in a ventilated buiilng wheel. Such unfurrowed buffs might be those made of plies stamped from sheeting and either held loosely in the bufling assembly or sewn spirally, crosswise or radially prior to using. Buffs might also be made of small pieces of remnant cotton, sewn together into what is known in the trade as pieced buffs.

In the preferred buing unit the plies are made of a strip of cotton which has been cut on the bias. In this way every thread in the material forms an angle of with the tangent at lthe point where the thread reaches the periphery. A bung unit so constructed wears much longer than one made of plies which have merely been stamped from sheeting.

Moreover, it can readily be seen that the use of a solid ring in this buing unit avoids the danger of flying apart during operation.

The preferred flexible material out of which buis are made is cotton, but other textile materials and such materials as paper textile linters bonded with a suitable adhesive arev known to make satisfactory bumng units.

The material out of which the hub may be made is preferably steel because of its cheapness and the ease with which the parts of hub can be made from it. However, any suitable metal, wood, cardboard or composite board might be employed.

In addition the flutes stamped at intervals and extending from the peripheral edge of the centre plate or disc need not be uniformly distributed about the periphery.

The advantages which this invention has over those of the prior art are several. For example, the hub or spacer need not be used with the buffing unit described above but may be used to mount other types of buffs. Moreover, it is not necessary for such bulls to be edged with steel since with this hub the radial air passages are formed as an integral part of thehub instead of relying on the steel edging to form two sides of these air passages. Furthermore, since the radial air passages are small and their entrance somewhat streamlined, there is less likelihood of them Abeing crushedby the `pressure exerted by the ferred buing unit is much cheaper and also,10

much stronger, and hence much safer than other prior art bufng Wheel assemblies.

It will be readily understood that many modications of the above described embodiment of this invention may be made Without departing `from the spirit of the invention and hence fall within the meaning and scope of the appended claims.

Having thus described my invention what claim is:

1. A ventilated buiiing wheel assembly comprising a plurality of annular bufling sections of flexible material arranged side by side; a spacing and supporting hub for each of said sections comprising a disc having a central aperture to receive a spindle and a plurality of perforations radially disposed with respect to said aperture to form axially extending air passages and a plurality of radial flutes stamped at intervals in the outer periphery of said disc and extending inwardly from the peripheral edge of the disc, and a ring attached between the spaced radial iiutes to one side of said disc adjacent the outer periphery and overlaying said flutes, said ring having an axially extending flange centering and supporting said annular buing section, the depth of said ring from the outer edge to the inner edge thereof extending inwardly a smaller distance radially of said disc than the inward extent of said spaced radial flutes and thus defining with said flutes radial air passages; and means clamping said sections and hubs for rotation with a spindle as a unit, said means having perforations therethrough to permit ingress of air.

2. In a ventilated buing wheel assembly, an annular bufng section of flexible material and a supporting hub for said section comprising a disc having a central aperture to receive a spindle and a plurality of perforations radially disposed with respect to said aperture to form axially extending air passages and a plurality of radial flutes stamped at intervals in the outer periphery of said disc and extending inwardly from the peripheral edge of the disc, and a ring attached between the spaced radial flutes to one side of said disc adjacent the outer periphery and overlaying said flutes, said yring having an axially extending ange centering and supporting said annular buffing section, the depth of said ring from the outer edge to the inner edge thereof extending inwardly a smaller distance radially of said disc than the inward extent of said spaced radial flut-es and thus defining with said flutes radial air passages.

3. A Ventilated bufng hub comprising a disc having a central aperture to receive a spindle and a plurality of perforations radially disposed with respect to said aperture to form axially extending air passages and a pluraliti7 ofradial iiutes stamped at intervals in the outer periphery of said disc and extending inwardly from the peripheral edge of the disc, and a ring attached between the spaced radial flutes to one side of said disc adjacent the outer periphery and overlaying said flutes, said ring having an axially extending flange for centering and supporting an annular buiflng section of ilexible materal, the depth of said ring from the outer edge to the inner edge thereof extending inwardly a smaller distance radially of said disc than the inward extent of said spaced radial flutes and thus deining with said flutes radial air passages.

VICTOR LLOYD RICHARDS.

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

UNITED STATES PATENTS Number Name Date 2,094,650 Hall Oct. 5, 1937 2,136,747 Levoy Nov. 15, l93`8 2,140,208 Murray Dec. 13, 1938 2,182,952 Todd et al. Dec. 12, 1939

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