US1453175A - Grinding machine - Google Patents

Description

MW, m, m23. www5' J,E.PEHRMULT GRINDING MACHINE Filed Feb. 17, 1922 4 SheetSSheet l @13 MMM @Noruega MLA v5 J, Ey PERRULT GRINDING MACHINE Filed Feb. 17 1922 4 Sheets-Sheet 2 mm mf, w23. Mmmm J. E PERRAULT GRINDING MACHINE Filed Feb. l'T 1922 4 Sheets-Sheet 5 l al m w IHII AMW., 2%-, 111923. f v RABW J. E. PERRAULT I GRINDING MACHINE Filed Feb. 17. 1922 4 Sheets-Sheet 4:

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To all whom it may concer/a."

Be it lmown that l, deserti ill. lPnunAonr, acitizen oi* the lUnited htates, and a resident ci Watertown, in thecounty oir Middlesex tl and State or Massachusetts, have invented certain new and useful improvements in Grinding ll/lachines, oil which the iollowing is a specicatio-n.,

ll/ly present invention relates toimprovelll ments in the art ol grinding the edges or sides 'oit' rectangular objects, such, for enample, as the hard rubber covers oi battery bones 'or cells, and, though not limited to this speciiic use, is, lor convenience, illuslli trated and described herein in this connection.

ll`he invention aims to provide apparatus by which such articles may expeditiously, accurately, and economically be ground or trued with a -minimum amount ol manual worlr or attention.

With such and other objects in view, the invention includes the novel features oil construction and arrangement and combination ci" parts hereinatter described, the nature and scope ol said invention bein dened by the claims appended to the 'lo lowing descri tion.

il hat il regard at present as the preferred l@ embodiment et my invention is illustrated in the accompanying drawings, in which :d llligure l is a plan view oit apparatus de signed lor grinding the edges ol hard ruhn her battery lloon covers;

titi hig., l is a section on line ae-a olf llig., l;

Fig.. il is a section on line li-h ol Fig.. l;

liig.. d is a iront view;

Fig.. d is an end view;

lliig t is a section on line ol l;

5 is a section on line 5-5 oil' l, and lfigsn ti to lll are detail views. ldelerring by reterence characters to these drawings, in which similar letters or numbers indicate the same parts wherever used, the numerals l and il designate the primary and secondary coveying or transporting elements whichv are shown as in the term oit endless chains or conveyors, the chain l conlill veying the covers trom a leed station in a rectilinear path between a pair ol primary grinding discs or devices, by which two el the edges are accurately ground in parallelism, and the chain 2 conveying them in a rectilinear path at right angles to the tirst named path and between a pair oi secondary grinding discs or devices by which the renoaining two edges are similarly ground or trimmed. The covers are designated by the numerals 3, 8, etc., and they may be supplied to the machine in any suitable manner, conveniently by placing them successively by hand in inverted positionl on a supporting plate or table el (litiga il@ and lb) and the tlange 3a at one side edge-being inserted in the guide slot or space 5a between the lower and upper guide raids 5 and l, which guide rails entend past the primary grinding discs as hereinailter described., Upposed to guide rails or bars i and l, or upon the opposite side ot the primary conveyor chain i, is a second pair ol guide rails or hars o and d,

spaced apart to provide an intervening guide slot o@ to admit the opposite edge flange ot? the cover, it being observed that the guide rails or hars ti and begin at the delivery end oi the table or plate t, so that the cover may he placed upon the table *trom position li in Fig. l, and shoved laterally in the direction oil the horizontal arrow, llig. l, until. its advanced edge dan e engages guide slot 5a, and then moved ongitudinal y to cause the body ol the cover to pass between the two pairs oi guide hars and the other edge tlange to enter guide slot di, such latter movement being indicated by the vertical arrow, lli l, lt will also be understood that the e ge portions 3 or tlanges project through the guide slots sudiciently ilarto enable the grinding discs to act on and shape the projecting edges., laeh successive cover may he shoved along between the guide rails, resting upon the lower rails, and retained against displacement by the u per rails, until it reaches the station ld (Fig, l) where it is 'in position. to be automatically moved lorward by the primary or crossconveyor chain l., 7llhis chain is provided with a plurality oil rangers 9, at suitably spaced intervals, designedto engage or abut against the rear edges or ends oi the successive covers and push them iforward between and past the grinding discs l0 and il., the opposed grinding 'ia/ces oil which act onthe side edgesL iid titi

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llltl of the cover and reduce them to the required dimensions.

Continuing past the grinding discs 10 and 11, the covers successively reach the station C where they are engaged by the suitably spaced guided pushers 12 of the longitudinal or secondary chain or conveyor 2 and moved at right angles to the former direction, and between. and past the grinding discs 13 and 14 whereby the remainin two (end) edges arel properly reduced in dimensions, or ground. Thereafter the covers are conveyed to the delivery end of the machine (station D) where they may be deposited upon a chute 15 or its equivalent to be delivered into a container (not shown).

While under control of its pusher l2, the cover rests on the upper edges of the lower guide rails or bars 16 and 17 and is held thereon by the overlying rails or bars 18 and 19.

As these battery covers are of an elongated nature and are moved broadwise by the secondary conveyor, it is desirable that means be provided to prevent any tipping of the covers, and insure their being moved in a true right angular line. To this end the pushers 12 are provided with spaced usher fingers 12El Fig. 8 which engage the si e edge of the cover at relatively widely separated points (on opposite sides of the center line) and said pushers are further provided with guide grooves 12b which engage the guide bars 20 and 21, the front ends of which guide bars are of wedge shape, as indicated at 20, Fig. 4 to -facilitate .entrance into the grooves.

To enable the apparatus to accommodate or operate upon different sized covers, one grinder disc and corres nding set of guide rails is made adjustab e towards and from the other. l

Taking grinder disc 11 and guide rails 6-8 as an example, a bracket 22 is fixed to the bed frame 63 of the machine (which may be supported by legs or standards 64) in which bracket is rotatably mounted one end of a feed screw 23, the other end of which engages a nut 24a of head 24:.

This head is slidably supported upon the bed frame and has bearings 24h in which the shaft of the grinding disc 11 is journaled.

Bracket arms 29 connected to the head 24 support the guide rails or bars 6-8, so

A that on rotating the screw in the proper direction by means of handle 25, the grinding disc 11 and rails 6-8 will be moved towards and from the disc 10 and rails 5 7.

. These latter rails are supported by similar arms 29a which however are not adjustable.

In connection with the adjustment of head 24, I find it desirable to use gauge means for accurac which may take the form of a bar as 26 ig. 1 having holes in its ends designed to fit over pins carried by bracket 22 and head 24: respectively, a number of such gauge bars being provided corresponding to the sizes of box covers, only one, however, being shown in the drawings. Preferably the nut 24 would be made adjustable to compensate for wear.

To compensate for variations in shape of covers, both sets of guide rails (i. e., cro and longitudinal) are preferably provided with means for micrometer adjustment relative to the heads. Such means may take the form of graduated cylindrical nut members 31 Fig. 13 rotatably connected to the arms 29 and engaging screws 30 ixedly secured to the respective rails, the cylindrical nut'members being provided with micrometer indications, as shown.

Preferably each member 31 is secured to its arm 29 by means of a bolt 32 which, after adjustment, may be tightened to hold member 31 against turning.

It will be understood that in the embodi ment shown in the lower or supporting rails of t-he pairs of guide rails are connected with the arms 29, while the upper or hold down rails are supported from the lower rails by braces or clips 8".

A change in width of the edges of covers operated on, would, in the absence of compensating means, cause a change in the position of the cover when released from the primary conveyor. To obviate this and insure the covers being released in exact alignment with the secondary guides, l mount the idle gear 33, over which primary conveyor chain 1 passes adjacent station C, adjustably, conveniently by journaling it upon the end of an arm 34 fulcrumed at 34a and provided with operating screws 35 and 36 (Fig. 14:) by which it may be adjusted to, and locked in, any desired position.

'Conveyor chain. 1 also passes around idle sprocket 37 adjacent station B, and also around drive sprocket 511- fast on operating shaft 51 which may be driven in any convenient manner, as for example/by belt pulley 49 controlled by clutch 52.

The secondary or longitudinal conveyor chain passes around driving sprocket 58 and idle sprocket 58a, the former being carried by a shaft 61 carrying a sprocket 60 driven by chain 62 from sprocket 56 fast on shaft 59, Fig. 4, which is driven by bevel gearing 55 from shaft 51, (see dotted lines Fig. 1). It will be understood that the driving connections thus described are what l consider at present the preferred form. but might be changed in various ways without departing from the spirit of my invention.

Preferably idle pulley37 is mounted on an adjustable carrier to enable the taking up of slack in the chain, as for example an eccentric shaft.

It will also be understood that the grinding discs may be driven in any desired manamarre l i ner 'trom any suitalole source ot povver, and l have shovvn hand pulleys as a convenient eans, as indicated 'lor example at llt..

lllliile passing into position U, or into alignment with the longitudinal or secondary guides, the covers necessarily pass a gap or cutaway portion ot the transverse rails, which must ot course terminate short ol the path ot the secondary conveyor, so as not to obstruct the same. "llo support the cover at this point, l provide a plate or talolo mernher 38, removable and replaceable hy plates oit diderent thiclrne to suit variations in thickness ot covers operated on., .as suoli a support vvould not necessarily provent the tilting ot a cover, duo to its peculiar shape, -l provide additional holding means in the shape ot `a controllinger 39, (seo lTig. ti). During thetime the cover is crossing the gap, the control finger, which is lnlcrumed at 39", occupies the position slioivn in dotted lines in lig. o.

'llie tinger is provided at its tree end vvitli a groove d0 (llig. 9) into which the advanced edge ol the cover enters and lay which it is supported against tilting. 'lhe tinger is also provided with a lug or extension dl adapted to he struclr hy the portion l2 ot the ided pushers ot the secondary chain 2, vvhicgliJl pushes the tinger tree trom the cover against the tension ot spring a2 as the cover moves onto and along the longitudinal or secondary guide rails 'itt-l?.

ln this transfer position C the cover is momentarily tree trom looth conveyors and should he held securely in correct position. rl"o this ond l provide a spring pressed hall retainer d3 lFig. l2 vvhich yields to permit dil dll'

the ready passage ot the edge ot the cover, hut vvliich springs out hehind the rear corner and prevents any retrograde movement or reloound attor the cover has heen released l'rom the propelling finger or projection ot chain l.

lWhile l have shovvn endless chains as the means lor moving the covers past the inding or shaping devices, it vvill loe understood that l do not limit myselt to suoli specihc means, though such l regard as pro'lerahlo,

as the conveyors can thereloy he driven in alosolute uniformity.

l-laving thus descrihed my invention, tvliat l claim is l. ln a machine lor shaping the edges ol hattery hor covers and similar articles having danged edges., .two sots oi upper and lower guide railsl having intervening guido spaces through which the said hanged edges project, shapingl devices mounted outside said guide rails and arranged to shape said projecting edges, and means for moving said articles along said guide rails. l

a. ln a machine lor shaping the edges ot articles having marginal Hongos, a pair ot supporting rails, mea tor conveyin the articles along said rails with their edges projecting over the same, and trimming devices arranged outside said rails and adapted to act on the projecting portions ot said danges. 3. ln a machine tor shaping the edges ot articles having marginal flanges, a pair ot supporting rails adapted to support said marginal Hanges, hold down rails ahove the same and supported therefrom, means tor adjusting one ol said supporting rails towards and trom the other, means tor moving the articles along said rails, and means l'or shaping the edges during such movement.

` 4t. ln a machine tor shaping the edges ot articles having marginal Hangesa pair ot supporting rails, hold down rails supported thereahove forming intervening tlange guides, trimming devices located adjacent said guides, pusher means for moving the articles on the guides, one set ot said rails terminating at its initial end short oit the remaining rails.

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5. ln a machine tor shaping the edges ol" articles having marginal anges, a pair o supporting rails, hold down rails supported thereahove forming intervening Harige guides, trimming devices Ylocated adjacent said guides,pusher means for moving the articles on the guides, one set ot rails torminating at its initial end short ot the romaining rails.. and an article support assofall ciated vvith the projected portions ot the r supporting rails. i

o. lnamachine oit the character described, a pair ot primary guides, means tor convey ing the articles along said guides, shaping means adapted to act on tvvo opposed edges vvhile so moved, a second sot ot guides arranged at right angles to said tirst named guides and to receive the articles theretrorn, shaping devices tor the remaining two op posed edges associated .with said guides, means tor moving the articles along said second set ol guides, and a yielding retaining dog at the terminationot the primary guides to prevent reloound ot the article..

7. ln a machine oil the character descriloed, a pair ol primary guides, moans tor oonveying the articles along said guides, shaping means adapted to act on tvvo opposed edges vvhile so moved, a second set oil guides arranged at right angles to said first named 'guides Aand to receive the articles therefrom,

sliapingdevices l'or the remaining tvvo opposed edges associated vvth ,said guides, means ttor moving the articles along said second set ot guides, and means lor supporting the article during its transiter troni one set ot guides to the other` taining device tor engaging the edge ot the article to prevent tipping vvhile resting on said supporting means.

ln testimony vvliereotl atiir my siature.

' JUEPl-l EPERRAT;

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