Патент USA US2403813код для вставки
July 9, 1946» ` J. `I.jvlArum-:RsczHEnD ' BUsHING's FOR PoLIsHING WHEELS Filed July 24, 1944 Í _2,403,813 Patented July 9, 1946 A 2,403,813 UNITED STAT ES PATENT OF FICE ` ' ' Y ` 2,403,813 ’ ' t ' BUsHING FOR PoLIsHING WHEELS ` James J. Manderscheid, Chicago, Ill. v application July 24, 1944, serial No. 546.425A .s claims. (C1. 51-168) », The present invention relates to polishing other v,composition suitable for the purpose and wheels and especially toa novel light weight having the desired rigidity and inherent. strength. bushing that may be readily inserted and per- f '.The present inventiony further comprehends a novel manner 'of anchoring the bushing onto `the polishing wheel-to thereby prevent'it from com manently anchored in the opening in such pol ishing wheels. ~ Polishing wheels now on the, market are each ingout or turning in the wheel. provided with a centrally disposed opening ap y ' i' Y Further objects are to provide a construction . pr'oXimately" 1A; inch less in diameter than the of maximum' simplicity, efficiency, economy and lathe spindle upon which itis to be mounted. ease of assembly and operation, and such fur The polishing wheel is then forced overV the 10 ther objects, advantages and capabilities vas will threads of the lathe spindle while the spindle is later more fully appear and areinherently pos rotating. This procedure not only causes wear sessed thereby. ` , on the spindle but also endangers the operator The invention further resides in the construc as he must release the polishing Wheel an in tion, combination and arrangement of parts illus stant before the Wheel hugs the inside flange on trated in the accompanying drawing, and while the spindle or a dangerous hand burn results. there is shown therein a preferred embodiment, Furthermore, this results in the opening being it is to be understood that the same is susceptible distorted out of round. ` of modification and change, and comprehends Among the objects of the present invention is y other details, arrangements of parts, features and to provide a novel construction Aof bushing for a 20 constructions without departing from the spirit polishing WheelV that may be safely, kreadily and easily mounted in a polishing wheel whetherl old or new. of the invention. Inthe drawing: It adds Very little to the cost of ~ ' , , , , , Figure` 1- is a- view in perspective of thenovel the polishing WheelY and when inserted,v is auto- , t matically and rigidly connected thereto in op 25 erative relation. A polishing wheel equipped with the novel bushing is concentric throughout its entire circumference, is accurately balanced and bushing. , Figure 2 is an enlarged view in vertical cross section through the bushing. , . , , t . Figure 3 is an enlargedview in side elevation of the polishing >lathe spindle and showing-the thereby completely eliminates all chatter or un The Work being polished 30 even wearing surfaces. with a wheel provided with the present bushing, will touch the face Vof the wheel along the entire circumference and thereby causing'theemery or manner yin which a pair ‘of bushings Vmayfbe mounted in a polishing Wheel4 byusing theA pol ishing lathe spindle as ascrewpress. ». ‘ v Figure 4 is a fragmentary ‘View similar to Fig ure‘ Sbut showing the bushings vassembled and forced intooperative position in thel polishing . abrasive to wear uniformly and avoid all waste. In the assembly of a. polishing Wheel equipped 35 with the present novel bushing, it may be slipped over the polishing lathe spindle »while the latter is stationary, so that neither the Wheel nor the machine is turning when the former is placed on the spindle. Furthermore, the wheel is not 40 wheel. " .f f j Figurev 5 is a View in side elevation showing a-single bushingl mounted in position and the polishingv wheel so equipped assembled on the ' spindle.. . Referring moreA particularly to the disclosure in forced over the threads either in putting it ‘on - the drawing, the novel embodiment selected to or taking it off and thus no wear or damage on illustrate the invention comprises a bushing I having a cylindrical hub or collar Zand a pe the spindle results. The present invention contemplates making ripheral flange 3, the hub or collar beingV provided the bushings in certain standard spindle sizes such as ,1, 11/4, 1,1/2, 1% and 2 inches in diameter, all standing projections or notches 4 adapted Yto be with an inside tolerance of approximately plus .003. For example, abushing that is to be ñtted onto a spindle of 11A inch diameter, the .inside .dimension of the Abushing is 1% plus .O03 or 1.253 inches in diameter. The bushing although preferably made of suitable metal of relatively light weight having sufficient strength and rigid with >a plurality ofsubstantially triangular up ' 'embedded in the materialof the rpolishing wheel 5 and thereby permanently and rigidly anchor the bushingwin place. To facilitate insertion and to guide the hub or collar of the bushing into the opening in the polishing wheel, the edge of this hub or collar is tapered or feathered at 6. In the assembly of the bushing I in the pol ity to prevent distortion, may 'be constructed of ishing Wheel, it may be pressed into the opening any other material including plastic, rubber or 55 1 of either a new or old wheel by any suitable 2,403,813 4 3 means. and provided with a peripheral flange and a hub One method that may be employed is portion, the latter adapted to be pressed into to use the polishing lathe spindle 8 as a screw the opening and anchoring projections formed press. All that is required is to reverse the flanges 9 and IE! as shown in Figure 3 and by tightening the nut l l, the bushing or bushings are forced into the opening 1 and anchored therein by the projections, notches or> tongues 4 as shown in Figure 4. Thereafter the nut il is backed off from the material of the hub and adapted to em bed in the material of the wheel as the bushing is pressed into the opening. inserted and anchored in the opening of a pre or unthreaded, and flange i0, polishingY wheel and flange, 9 removed in sequence. The flange 9 . 4 (l is then reversed and again applied to the spindle, after which the polishing Wheel is slipped over the spindle, the ñange I0 applied and the nut Il drawn tight to lock the polishing wheel in oper ative position as shown in Figure 5, where> a sin gle bushing is employed. Generally but one bushing need be employed, butV wherethe thick ness of the Wheel warrants, two may be applied. These bushings are of light weight material such as approximately 16 gage drawn steel, al thoughfany other metal, or other- substance in cluding plastics, hard rubber or rubber-like com positionshaving sufficient inherent strength and rigidity to withstand thev conditions of> opera tion, may be used.l . . , . . Whereas by theold method it was necessary to. bore an opening approximately 1/8 inch. less in' diameter than the diameter of the spindle on *which` the Wheel was mounted, and to then spin - 2. A bushing adapted to be readily and easily formedl and standard construction of polishing wheel, comprising a collar adapted to1 be pressed into the opening and of such length as to accu rately mount the bushing in the opening and maintain the concentricity of the wheel, a flange formed at one end only of the collar and adapted to bear against aface of the Wheel, and spaced projections on the circumference of the collar which' become embedded in the material of the wheel when the collar is forced into the opening and thereby anchoring the bushing in the wheel. 3. A bushing adapted to be mounted in a cen trally disposed openingv in a new yor old polish ing wheel, consistingV of* a member formedv of. a light vweight substantially rigid-material providing Va collar adapted to be forced into the opening, a i flange at one end of the collar adapted' to seat against a side of the Wheel' as the collar of the bushing is forced into the opening, and means on the collar for anchoring> it into the material of the wheel surrounding the opening when the ~the' motor lathe spindle to mount thewheel, by 30 collar is forced into this opening. 4. In a standard' construction of polishing the'ïuse-of the present novel bushing, the wheels are bored to the-size of the spindleand thewheel applied with the spindle stationary. For eX ample, if a polishing Wheel is to bemounted on a ‘wheel adapted to be mounted on a lathe spindle and provided with a centrally disposed opening, a bushing having a hub adapted t0 be received 11/4 inch spindle, the opening lI is bored to that 35 in the opening, spaced projections on the hub adapted> tof‘oecorney embeddedv in the material of .diameter and a 1% inchbushing is inserted. As the wheel when the hub is pressed into the open this bushingY has an internal diameter of approx-ing for anchoring the bushingtherein, and a pe imately v.003 inch larger than the diameter of ripheral» flange on onel end only of»y the hub for the spindle, itis not forced over thespindle and there is-no danger of damage theretoregardless 40 locating the bushing in the wheel adapted to abut against a side of4v the wheel when the hub is of how often the Wheel is assembled or replaced; pressed into the opening. Furthermore, as the wheel is applied to thespin 5. A- bushing adapted to be readilymounted in dleï when stationary, there is no danger to the operator. , The hub or collar 2 is of such construction and length that the Wheel is properlyrcentered at all times. and-under all operating conditions. In the prior` devices where> the polishing wheel was pro. vided witlraA smaller hole fitted or threaded over a larger spindle, considerable friction resulted which not only caused wearV on the spindle but also distorted- thehole or openingA so that the Wheel would be looseor hang onuthe spindle. The wheel- being- out of'> balance necessarily resulted in chatter. The present novel bushing has universal appli _ cationl to anyl of thel Various types-oi?Á polishing wheels now onl the market regardless of the ma terial of which the wheel is made, and islof such inexpensive construction that it adds but little to thecost oi- the wheel. Havingl thus disclosed my inventiony I> claim.: i 1. A- bushing adapted to be pressed intoand automatically locked in a centrally disposed‘open ing in a preformed polishing wheel, consisting of a member formedV of relatively thin gauge metal either a new or oldpolishing wheel‘- by.` the user, consisting of a collar adapted toloerpressed into the opening and' an integral» flange at one end only of the collar- and abutting against aside of the wheel when the collar is inserted to its proper depth, said collar being provided with a plurality of notches with integral projections so disposed as to anchor in the material ofthe wheel for se curing together the wheel andv bushingV and pre venting» the bushing from turning inthe wheel. 6. A bushing adapted to be readily assembled in` anopening ina new or- old polishing Wheel, com prising a collar having an annular, peripheral flange at one end andl its other end> tapered to facilitate assembly and to guide the collar into the opening, projections formed from the mate ` rial of the collar and projecting/outwardly there from in suchimanner that as the collar ispressed into the opening, these projections interlock with the material of the wheel and` preventuninten tional removal or turning ofl the bushing inthe opening. JAMES-J'. MANDERSCHEID.