US2363728A

US2363728A - Polishing machine

Info

Publication number: US2363728A
Application number: US467084A
Authority: US
Inventors: Grunwald Raymond
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-11-27
Filing date: 1942-11-27
Publication date: 1944-11-28
Anticipated expiration: 1961-11-28

Description

NOV. 28, R. GRUNWALD POLISHING MAHINE Filed Nov. 27, 1942 2 Sheets-Sheet l NOV. 28, R GRUNWALD POLISHING MACHINE Filed Nov. 27, 1942' 2 Sheets-Sheet 2 havingrelatively1i small-@dimensions Patented'Nov. 28, 1944y f yApplication;Nve'mber 2 iclms..

inventionV71 relatesffto `polishing-` or buing machines 'andvr moreparticularlyj`y to a machine for polishing: the.' interior surfaces of articles" Heretoforefvbuing or polishing machines of theltype--havinga driving pulley-a polishing head'fandlamendlessgbelt havebeen providedfor'v I buffinglor polishing articles.` `Generally such *machines'have'provided* at the polishing head y afsmall pulley'whiehi'enga'ged the other loop vend. of tliebelt.: fFor polislii1`1gsin1slots therehas been provided' in -placeof suchpulley a polishing plate i provided Lwith a bifurcated' member arranged fto pleti'n'g the: polishing it"i's-then again necessary tofstop-the-machine andtofremove-thefbelt- This consumes a' great amount o-f time withV the result`thatthe processis slow:tndexpe'nsive- Inaccordance with' my invention 4I have prelvddan arrangement!forfsimultan'eously polish-V ingtwo spacedlapartjsurfaces lin an article such aslabelt' buckle yWithout necessitatingany removalioflthe polishingjbelt Jor any complicated adjustment .procedure .y has been, accom`v plishedby providing apoli'shing head, which is adjustable in. positionr so as. rto readily vtension the...belt.a`nd` to ,providza ,beltplate aboutwhich t the belt is passedlwhich is,- relatively; thin; and. narrc'ivv.` so that the ,v article to. be ,polished .may becslipped directly. over in place ,thusgreatly, re,- ducing,Y ,the time-required 'for .polishing each are` t(.1e.4 l Q v Itcisg'gtherefore, an cvbjectl of; my inventionf to provide a new andimprovedpolishing or,bumng,

machineparticularly s uited .for- =polishing. the in` y side. surfacescia-relatively small i article. u

@ther and `further. fobjeetsvofc rnyv invention will: f. become morefreadily;A apigiarent-` by;referencefto they following, description-1 taken; inf; connection.. i

Witlrftliei--accompanying drawings; 'Wlflerei'n-rI Figure-his a top {viewaof a polishing machine censtruetedl ,irnaccordance With.m55-invention: V

s'i-a'isideevimofthefmachinefshownn'f.

seciimtakenfalongetheqli 7, malsain# f Y and; are' vtop and; side views respecafmodied,` form of f myinvention;l and rFig isia', full fsize perspective vView of anarticleiofzantypei tol be'. polished by my machine.

Referringjmore particularly to Figs. 1, 2,V and 3tfthereeisshovvn azpolishing'machine having'a f bas" I I which adjjacent'fone endsupports a` flat' drivingipulley I2fwhich is operated Vfrom a suitable' 'sources of povvervvhich may compriseanI i:elec'ztricrmotork I3. Adiacent'itheA other 'end ofl the base1f-|`li theref'isf.. provided 1a polishing vhead comprisingra'.bed'plate I4 .provided Withrslide- Ways: I ST-Which` in turn'. support a movable sliding;carriage I 6^: Thelbedfplate I lis' interconylinecsted with the slidingrcarriage I6A by means ofiam-laiddiistinglcscrem:Ifhiwhichisiprovidediwith" azimanualactiiating: device or l handle I8 in (the proximity-z ofetheifrontriofi ther-L polishing 'headzl Preferably the adjusting screw I1 and the operat r ingc'li'andle .e1 IM area; similazetoa. the Aftypenoif screw utilizedxin the :construction of a bench vise.-v

"I'heislidable carriage: I6 is provided with .an

, uprightpostforrsupportipg'member vI 9 which may besfsecuredithereto by Isuitable` fastening means t cent theztop:thereofia-.transverse arm o rbracket plates 23are each"- relatively long andpnarrowf" 'andinas/efA afroundedY edgeg25 which is arranged' tor-engageffone -lo'opoffapolishing belt 26.v In

thea'arrangement-rshownithere is providedA a` pair 'offjbeltesupporting:plates.'23 whichv are spaced apartfandieachfis'provided with oneof a pair I'ZnwThe.- p air'of be1t`sf26f'are retained in posi- `tion:onffthev,longitudinallyA extending belt j plates 40 2lgbyyaipluralityrxof beltspacersfsuchas thereplaceahlef'block" 2.-'Ifv and thejrepl'aceable pins 28'.

Ihesel-f-bel-tfguidinge means if are made'v replaceable j since it?` hasrbeenf` found-thatthe",` edges i of the belt:whichL isf: coated with, an abrasive rapidly Y; ""wem1rthe spacingf'means: Supported -fromv an intermediate point1v onptheysupporting post` I9 there is-abella spacer'and'v guide29 which may spacerrand v guide'Z 9@ is provided" with" suitable groovesl 323 for 4 b'eltsl 25.2` o i 'rhefbew buckle sueas-shown in Fig. emv;

asf

begseouredimposition by^a` bolt13l." The belt' guiding`A the under 'side of thel ing/-faniouterframe133andan'intermediate cross Y member-:534.2 isfy supported' in fa suitable-#jig and then plant-:dv uponz the-b'elt'l plates-u 23 fsomewhatas indicated bythe dotted lines in Fig. 1. The belt buckle is then moved to a position such as shown by the dotted lines A in Fig. 2, whereupon opposed edges 35 of the belt buckle 33 are polished by a sort of oscillating rotating movement. The belt buckle is moved to the dotted line position B of Fig. 2, whereupon two other opposed surfaces such as the surfaces 36 of the buckle 33 are polished. Since the belt guide and spacing member 29 spaces the under side .of the belt 26 away from vthe belt lplate 23 there is provided an arrangement whereby two spaced apart and opposed surfaces may be polished at the same time. The belt 26 has sufficient resiliency so as to permit some latitude in the pressurev exerted oscillating it or rotating it between-,positions A and B of Fig. 2.

When it is desired to vpolish such surfaces sv the

edges

31 and 38 of the buckle 33 the polishing head is provided with a wider flat plate 39 shown inligs. 4 and 5, which supports a single belt dh The central guide 21 is removed and where necessary new side guides 42 .serve in place 'of theguides 23 of Fig. l.. The lower belt spreading and guide means '29 is .replaced by another spreading means ll3 which has a single slot or groove M to accommodate the new belt 4|. The belt buckle' 33 is thereupon placed over the end of the belt plate 39 in the manner shown by the dotted lines of Figs. l and 5, whereupon the buckle is rotated or oscillated between two limits much in the manner as that described ink connection with Fig. 2. From the above description it is believed and it will become apparent that the present arrangement has many advantages over the arrangement of theprior art and that the time required for polishing small objects such as parachute buckles is greatly reduced.

While for the purposes of description and illustration a particular embodiment of my invention been set forth, it is to be understood that I do not wish to be limitedjhereto since obviously'such modifications may be made in the construction and in the instrumentalities employedl as may be commensurate withv the scope of they appended claims.

-What I claim. as new and desire to secure by Letters Patent of the United States is:

l. The combination in a polishing machine comprisingr a base, a flat Vdriving pulley positioned adjacent one end of said base, a polishing head positioned adjacent the other end of' said base, a relatively narrow endless polishing belt interconnecting said pulley and said polishing head, said polishing head comprising a bed l plate provided with slideways arranged parallel to the direction of said belt, a sliding carriage supported in said slideways, an'adjusting screw interconnecting said carriage and saidbed plate,

means adjacent the front of said polishing head for manually actuating said screw, a supporting post positioned yadjacent one side of said carriage, a transverse bracket extending therefrom, a lrelatively long narrow polishing belt supporting plate supported b-y said bracket, said polishing belt supporting plate having a rounded edge for engagement with one loop end of said belt, replaceable belt guide means supported by said bracket, and a belt spacer supported from an intermediate point on` said supporting post; said belt guide means acting to guide the upper run of said one loop end of said belt over said belt supporting plate, and said 'belt spacer acting to space the lower run offsaid one loop end of said belt from the upper run thereof, whereby the upper and lower runs of said one loop end of said belt may be simultaneously employed for the purposes described.

2. The combination in a polishing. machine comprising a flat driving pulley, a polishing head spaced away from said driving pulley, a pair of relatively narrow endless polishing belts interconnecting said pulley and said polishing head, said polishinghead comprising a ybed plate provided with slideways arranged parallel to the direction of said belts, a carriage movably mounted in said slideways, and a manually actuated screw operable adjacent the front of said polishing head for adjusting the position of said carriage relative to said'be'd plate, upright supporting means positioned adjacent one side of said carriage, a transverse bracket extending therefrom, a pair of spaced apart relatively long narrow polishing belt supporting plates mounted on'v said bracket, said polishing belt plates each projecting forwardly from said'bracket beneath the upper run of one 'of said polishing belts and each having a rounded edge for engagement with the forward loop end of an associated polishing belt, and a belt spacer supported from an intermediate point on said upright supporting means above the lower run of both of said pair of polishing belts acting to space the lower runs of said belts from said polishing belt plates, whereby the upper and lower -runs of the forward loop ends of both of said polishing belts may be simultaneously employed for the purposes described.

3. rThe combination in a lbuffing machine comprising a driving pulley for a buing belt, a buffing head for said belt spaced from said pulley and positioned in alignment therewith, an endless bufling belt mounted on said pulley and said polishing head, said polishing head comprising a member provided with` slideways longitudinally arranged with respect to' said belt, a carriage mounted in said slideways, an adjusting screw interconnecting said member and. said carriage, means for manually operating said screw, an upright post mounted upon and adjacent one side of .said carriage, an arm` extending transversely from the Vicinity ofA the .top of `said post, a longitudinally extending plate projecting forwardly from saidarm beneath the upper forward run of said belt and having a rounded end over whichV said belt is returned, the top and the end of said plate being arranged to engage the inside of said belt, belt guiding meanssu-pported by said arm, and a vbelt spacer and guide transversely positioned and supported :from an intermediate part of said post, also engaging the inside of said belt and acting to space and guide the lower forward run of said belt a predetermined distance from the upper forward run thereof, whereby the upper and lower forward runs of said polishing belt may be simultaneously employed for the purposes described. l

4. The combinationina polishing machine comprising a driving pulley, an adjustably positioned polishing head aligned with and spaced from said driving pulley'and comprising a bed plate provided with slideways, a carriage suphaving a rounded edge arranged to engage one loop end of an endless polishing belt, said plate extending longitudinally within said belt and being spaced from said carriage, support means on said vcarriage supporting said belt plate at one side thereof, means supported by said support means in spaced relation to said carriage and to said plate for spreading and guiding.. an endless polishing belt, manually adjustable screw means interconnecting vsaid carriage and said bedplatel whereby the tension of a polishing beltmaybe readily adjusted, an endless polishing belt supported by said pulley, said belt plate and said spreading and guiding means, said belt being mounted to havefa relatively small loop end to permit slipping of Work thereover to be polished,

whereby an upper and a. lower surface of the work may be polished simultaneously.l

RAYMOND GRUNWALD.