US1585983A - Art and apparatus for grinding - Google Patents

Description

May 25', 1926. v 1585983 l l.. R. HEIM ART AND APPARATUS FOR GRINDING Filed August 4. 1922 4 Sheets-Sheet 1 l.. R. HEIM lART AND APPARATUS FOR GRINDING 4 Sheets-Sheet 2 I gnou/H501. w44 fx. Mw

Filed August 4, 1922 L. R. HEIM ART AND APPARATUS FOR GRINDING May 25 1926.

Filed August 4, 1922 4 Sheets-b-Sheet 4 Patented May `2a 1926.

UNITED STATES PATENT oFFlcE.

LEWIS H. HEIM, OF DANBURY, CONNECTICUT, ASSIGNOR TO iTHE HEIM GRINDEB COM- IANY, OF DANBURY, CONNECTICUT, A CORPORATION OF CONNECTION''.l.`

ART AND AFPARATUS FOR GRINDING.

Application led August 4, 1922.. Serial No. 579,568.'

This invention. relates to grinding and,

more particularly, to an art and apparatus for grinding articles or bodies having a circular cross section.

One of the objects of. this invention is to provide practical apparatus of efiicient and reliable .action for grinding articles or bodies of l'circular cross section aind capable of grinding such articles in various forms.

Another object is to provide apparatus of the above nature in which convenience and simplicity of manipulation are combined with ruggedness and durability of construction. Another object is to provide apparatus of the above nature -readily adaptable to meet.

various conditions of use; Another object also is to provide a simple' and'practical artV of grinding articles which may be readily and inexpensively carried on and with ac-v curate and dependable results. Other objects will be in`\ part obvious or in part pointed out hereinafter.

,'l/he invention accordingly consists in the features of construction, combination of elements, arrangements of parts and in the several steps and relation and order of each of the same to one or more of the others all as will be illustratively described herein, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings in which is shown one ofl various possible embodiments of the mechanical features of this invention,

Figure 1 is a plan view of the grinding apparatus, certain parts being broken away;

Figure 2 is a sectional view taken on the line 2 2 of' Fig. 4;

Figure 3`is a plan view onan enlargedscale of certain arts of the apparatus shown in Fig. 1, lcertain parts being broken away and shown in section to illustrate more clearly certain features of construction; Figure 4 is a side elevation, partly in section and with certain parts broken away to show the construction more clearly, as viewed from the bottom of Fig. 3;

Figure 5 is a view in plan substantially similar to that of Fig. 3, but shows a modified form of apparatus; and

Figure 6 is a partial side elevation as viewed from the bottom of Fig. 5.

Similar reference characters refer to similar arts 'throughout the several views of the rawings.

Referring now to the drawings and more particularly to Fig. 1, there is shown a main supporting frame 10 provided at its top ortion with suitable palrs of ways 11 an 12 extending longitudinally ofthe main frame 10 and adapted to slidably support thereon the carriages 13 and 14 respectively. At the adjacent ends of the carriages 13 and 14 are provided pairs of bearings 15 and 16 respectively adapted to rotatably support the shafts 17 and 18 respectively. The shaft 17 is provided with a pulley 19 intermediate the bearings 15 and has mounted upon an overhanging Aend ther'eof what will be herein termed a regulating wheel 21. The shaft 18 is provided with a pulley and upon its overhanging end is mounted to rotatethere with what will be termed a grinding wheel 21a and 22a respectively, approach-.ing each other. The wheels 21 and 22 are rotated by means of their respective pulleys at speeds which are respectively low and high, the

grinding wheel 22 being driven at a suitable grinding speed. Moreover, the wheels are rotated in such directions, `as indicated by the arrows in Fig. 2, as to present the operative surfaces 21'* and '22 traveling in opposite directions.

As will be seen in Fig. 1, the carriages 13 and `14 with their respective wheels 21 and 22 ma be moved in their` res ective ways I towar or away from each ot er, suitable screws 23 and 24 operated bythe hand wheels 23 and 24 being provided for bringing about this adjustment.

As shown in Fig. 1, the wheels 21 and 22 operate within a housing 25, shown broken away in this figure, the housin 25 being suitably sleclned to the front o the mam frame 10 of the machine. Turning now to Fig. 4 ofthe drawings, part of this housing construction is more clearly shown in section and it will be noted that the housing 25 is` provided with a front wall 26 and a rear wall 26a bridged by the rib 26b between the wheels to form a horizontal lsupporting surface. Upon the latter rests a casing 27 in general of a cylindrical shape but planefaced on its under side to rest upon the bridging rib 26b and adapted to extend rearwardly between the wheels 21 and 22. The casing 27 has adjacent its forward end a downwardly extending lug or plate 28 preferably integrally formed therewith by means of which the casing 27 is secured in position to the front wall 26, a suitable screw 29 servi-ng to make the connection therebetween.

The casing 27 is bored out throughout substantially its entire extent, as indicated at 3() (see Fig. 2), to provide a cylindrical bearlng or guiding surface, and within the caslng 27 is housed for slidable movement therein a substantially cylindrical bar 31. Suitable caps 32 and 33 are mounted upon the respective ends of the casing 27 thereby to eflectually enclose and protect the relatively sliding surfaces of the parts therein.

At the forward end of the bar 31 and upon the under side thereof, as is more clearly shown in Fig. 4, there is formed a rack 34 adapted to mesh with a spur gear 35 ixedly mounted upon the stud shaft 36 which is rotatably supported between the spaced lugs 37 and 38 (see Fig. 3) integrally formed with the casing 27, the latter being suitably slotted or aperturedw to permit the gear 35 to extend into the casing 27 for engagement with the rack 34. Upon the outer end of the stud shaft 36 is mounted a handle 39 by means of which the spur gear 35 may be manually operated. Thus, referring to Fig. 4, a clockwisel continuous movement of the gear 35 moves'the bar 31 inwardly Vwithin the casing 27, and upon a counter-clockwise movement of the handle 39 and gear 35 a reverse movement of the y bar 3l takes place, it being noted that the movement of the bar 3 1 throughout its range is brought about by a substantially continuous movement of the gear 35 with its associated operating handle 39. y

At two spaced points in the upper surface of the bar 31, preferably one on each side of the wheels 21 and 22, are provided inclined surfaces 40 and 41; and at two substantially similarly spaced points in the casing 27 the latter is provided with vertically extending cylindrical openings 42 and 43 extending preferably entirely through the casing 27, The casing 27, moreover, has formed around the openings 42 and 43 and extendingv upwardly, as viewed in Fig. 4, sleeves 44 and 45 respectively. A pair of posts extending in a general upward direction and indicated generally at 46 and 47 are associated with the inclined surfaces 40 and 41 respectively of the bar 31 and it will be seen that the posts 46 and v47 have integrally formed therewith the downwardly extending, substantially cylindrically shaped portions 46n and 47L respectively, slidably mounted within the Avertically extending , guidingv sleeves 44 and 45 respectively. lach of the portions 46a and 47a of the vertically extending posts 46 `and 47 is slotted at the lowermost end thereof in order to straddle the bar 31 which is cut away upon the lateral sides adjacent the inclined surface portions 40 and 41, as is more cleurly shown in Fig. 2 in connection with the post 46. Thus, as shown in Fig. 2, the lower-most end of the portion 46a of thc post 46 is slotted as at 46h, and in this figure is also clearly shown the manner in which the slotted portion straddles and overlaps on each-side the cut-away portion of thc bar 31. The latter is thus held against rotation about its axis and the constant engagement of the gear 35 with the rack 3# is thus assured.

It will thus be seen that upon movement of the bar 31 in the manner hereinbefore described and in a direction to the right as viewed in Fig. 4, the inclined surfaces 40 and 41 are operative upon the downwardly extending portions 46a and 47a of the supporting posts 46 and 47 respectively to give the latter a continuous upward movement as viewed in Fig. 4. Similarly, movement of the bar 31 to the left permits a retrograde movement ofthe posts 46 and 47 to take place. As conducive to greater clarity of expression, the upward movement of the posts 46 and v47 with associated parts to be hereinafter described will be hereinafter termed an outward movment, and the retrograde movement will be hereinafter termed an inward movement, reference being had more particularly to Fig, 2 of the drawings, wherein such movements will be seen to be respectively outward and inward with respect to the approaching operative sur'- faces 21 and 22a of the wheels 21 and 22 respectively.

The posts 46 and 47 are in general of a substantially cylindrical shape and are slotted along substantially the axis thereof as at 46 (Fig. 2) and 47c (Fig. 3). VVithiu the slots 46c and 47c is positioned a worksupportingmember 48 of sufficient extent or length to extend between the operative surfaces of the wheels 21 and 22. The work support 48 is secured to the post 46 by means of the bolt 49, the head 49aL of which extends through a slot 46d in one-half of the post 46 to hold the bolt 49 against turning, the body portion of the bolt 49 extending through a slot 46e in the other half of the post 46 and extending vertically with rellfly spect thereto. By this construction it will be seen that the one end of the work support 48 may be rigidly secured to the* post 46 and vertically adjusted with respect thereto. A substantially similar construction is employed for securing theyother end of the work support 48 within the post 47, this construction being more clearly shown in section in Fig. 3. wherein the slot 47'i in one half of the post 47 for holding the head of the'bolt 50 against rotation is clear-` ly shown. It will thus be noted that the work support 48 is thus rigidly supported at two spaced points, .one at each side of the wheels 2l and 22, and thatl each end of the work support 48 is independently adjustable vertically with respect to the supporting posts 46 and 47.

Referring now to Fig. 2 of the drawings, it will benoted that the work support 48 is milled or cut away at its upper lateral portion and throughout substantially' its entire extent to provide a recess for accom- `modat1ng a suitable wear strlp tobe exposed to the work supported by the work support 48. As shown in this figure, the wear strip 51 is accommodated y,within the recessed portion of the work support 48 and its upper end face is exposed to the work. generally indicated at 52, for contact therewith, The wear strip 51 is preferably made of.a suitable metal, such as steel, and is ,f preferably hardened so as to eii'ectivel resist wear. Turning now toFig. 4 o the drawings, it will be seen that I prefer to make the strip in a plurality of sections, as indicated for example at l51, 51b and 51.

' Each of the sections is slotted preferably at its respective ends, as at 53,.the slots 53 extending in a vertical direction and each adapted to have passed therethrough a screw 54 extending into the work support 48. The wear strips 51a, 51b and 51, thus associated in endwise relation, maybe independently adjusted with'respect to the workv support 48-in order that their upper end faces exposed for contact with the work'52 may be placed in alignment; with each other.

As will be more. clearly understood hereinafter, the maximum Wear on the wear strips occurs in those parts thereof substantially immediately between A the operative surfaces of the wheels 21 and 22 and by providing a wear strip of a plurality of sections as above describedit will be seen thatl those sections or parts of the Wear strip subjected to greatest wear may be readily readjusted for alignment with the remaining parts or, moreoyer, may be readily removed for regrinding, for example, or retruing and then replaced and aligned Withlthe other sections. Moreover, the detrimental effects usually resulting by reason of warping due to hardening where a continuous wear strip is employed are effectively avoided and greater accuracy and uniformity of l product at-` I As shown in Fig.' 4, pairs of tension springs 55 and 56 are inengagement at4 their respective ends with the work support 48 and the casing 27 and tend normally to hold the slotted parts of the extensions 46'1 and 47 *l of the posts 46 and 47 in snug contact with the inclined surfaces 40. and 41 respectively, and thus insure a positive control of the inward or outward movement of the work support 48 in response to the actuating mechanisms hereinbefore described.

Adjacent the ends of the casing 27 and upon the upper surface thereof (Sec Fig. 4) are provided the bosses 57 and 58 within which are threaded the cap screws 59 and 60 respectively. The bosses and their associated cap screws are positioned substantially within the path of inward movement of the work support 48 and act to limit the extent of such inward movement of the work support 48. The .height 'of the abutting screws 59 and 60 may be readily varied and it will be noted that these adjustments may be made independently of each other so that the extent of inward, movement of each end of-the work support 48 may be predetermined at will. The limiting screws 59 and 60 are provided with lock nuts 59a and 60a respectively in order to lock the screws` at the desired height ofradjustment. Thus, upon movement of the bar 31 to the left or into the position as shown in Fig. 4, the work support 48 is positively moved inwardl'y between the operative surfaces 21a, and 22El and the extentvof such movement, it

will be seen, is positively controlled or limited. y

Considering now the operation of the apparatus, it will be first assumed that the work support 48' is adjusted within the posts 46 and 47 so that the upper end faces `lating wheel 2l is givenA a path of travel which makes an angle with the path of travel of the work 52 determined by the work support v48. In Fig. 1 of the drawings this relative inclination of the axes of the 4two wheels is not shown in order to avoid Complexity of illustration, butin Fig. 3 0fthe drawings the portions of the wheels 2l and 22 are clearly shown in the above relation. As hereiubefore noted, and as is more clearly shown in Fig. 2, the operative surfaces 2l and 228L of thetwo wheels approacli each other and present on each side of the work support 48 and adjacent thereto oppostely disposed operative portions of these surfaces adapted `to operate upon the work presented thereto. The operative surfaces of the wheels 21 and 22 are, moreover, so trued by suitable truing devices that the adjacent and opposed operative portions of the approaching surfaces 21a and 22a are more distant from each other at one end of the wheels in an axial direction than at thel other. In Fig. 3 of the drawings, the opposed operative surfaces of the operative portions 21 and .22a of the two wheels are shown farther apart at the right-hand 'end thereof thanfat the left-hand end thereof, presenting to the work 52 lines of contact or operative portions of the surfaces which make an angle with each other as viewed in Fig. 3.

' The actuating mechanism is first operated to move the bar 31 to the right, as viewed in Fig. 4, thus to move the work carrier 48 outwardly between the approaching operativesurfaces of the two wheels, as viewed in Fig. 2. The work 52, herein shown as a twist drill, is thereupon placed yupon the work support 48, the section 52a which it is' In order to maintain the work 52 upon the work support 48 when the latter is thus moved outwardly and held in outermost position there are mounted upon the respective halves of the post 46 L-shaped guides 61 and 62 each suitably slotted as at 63 and secured to the post 46 by means of the screws 64. The guides 61 and 62 may thus be independently adjusted toward or away from each other to accommodate ltherebetween work of different diameters and thus act to temporarily maintain the work 52 on the work support 48. The inner faces of the guide plates 61 and 62 I prefer to provide with wear plates 61a and 62a respectively, each detachably secured to its respective j guide plate by means of screws 65, and each preferably composed of a suitably hardened f metal.

The actuating mechanism is thereupon operated to move the bar 31 with associatedy control the rotation of the work 52 upon the work support 48 during the action thereon by the grinding wheel 22 and the latter .is effective to grind the right-hand end of the section 52 of the work 52 larger than theleft-hand end of this section, thus grinding this section in tapered form to an extent determined by the angular relation between the operative portions ofthe two surfaces.

The regulating wheel 21, however, in having the path of travel of its operative surface 21a make an angle with the path of travel of the work 52a as determined by the work support 48, is effective also to feed the work 52 along the work support and in a direction to the right, as viewed in Figs. 3 and 4.

As the work 52 is thus moved in a direction substantially along its axis, the righthand end emerging-.from the opposed loperative portions of the two wheels is received between two spaced L-shaped guide plates 66 and 67 adjustably mounted upon the two halves of the post 47 as by means of the screws 68. The construction of these guide plates 66 and 67 is preferably substantially similar to that of the guide plates 61 and 62 hereinbefore described, and it will be noted that the guide plates 66 and 67 are similarly provided with wear plates 66a and 67a respectively. The free end of the work 52 thus emerging from the more distant ends of the opposed operative portions of the wheels is guided by means of these guides 66 and 67 as the work is fed along the work Y support 48 by the regulating wheel, the other or lessdistant ends of the operative portions of the two surfaces being effective to grind the exteriorly positioned portion 52b or shank of the drill substantially cylindrical. After the body operated uponhas thus been passed or fed along the work support 48 and the grinding action thereon completed, the actuating mechanism is operated to move the work support outwardly between the approaching operative surfaces, whereupon the finished work is removed from the work support and replaced by the piece to be subsequently operated upon, whence the cycle hereinbefore described is repeated. Y

Itv will be noted that the work 52 placed upon the work support 48 when in outermost position is held out of contact with (i the operative surfaces of the two wheels when the limit of the inward movement of' the work support is reached. Moreover, the

inward'movement of the work support is at each inward movement thereof halted at the samepredetermined point so that the work is each time presented to the desired and intended operative portions of the surfaces related to each other in predetermined manner, as hereinbefore described. The attainment of accurate and uniform results is thus assured and it will be noted that the operation and manipulation of the apparatus is carried on in a simple, dependable and reliable manner. that the action of the apparatus hereinbefore described has'been set forth as taking place upona drill, in which it is desired to grind the, operati/ve portion thereof in tapered form, only for convenience of -illus-` tration, and that,the relation of the operative surfaces of the opposed operativeV portions thereof may be readily changed to meet varying conditions o-f use. Thus, for example, where it may-be desired to grind a body of circular section to aforrn having a greater taper than that of the body above assumed for illustrative purposes the oper-v ative portions of the two wheels may be vmade -to include therebetween a greater angle than hereinbefore set forth; and that where such a greater taper is desired to be formed,

it may be desirable to incline the work support 48 with respect to the horizontal.

Such change may readily be made. by independentl Aadjusting the respective ends of the wor support 48 vertically in the posts 46 and 4 7, and the limiting stops 59 and 6U may be correspondingly adjusted to differing j `elevations to properly limit the inward movement of the worksupport 48 thus inclined.

' lt'will also 'be noted that, as shown in v Fig. 1 of the drawings and as hereinbefore described, the wheels 21 and 22I may be readily adjusted toward and away from each other in order that their operative surfaces and the operative portions thereof may bear the desired relations with respect to the work supprt, this adjustment of the wheels-being made use of particularly for adapting the apparatus for operation upon various sizes or diameters of work.

`It might also be noted at this point that ,the .extentof inward movement of the work .support may be readily varied by` changing the adjustment of the'limiting screws 59-and 60 in accordance with different diameters of work that may be operated upon and so that,

It will be understoodlis intended to be operated. upon the inward movement of the work support 48 may be made less in order that the work may be' properly positionedI to the lines of contact or 4 of the surfaces of the two wheels are presented to the work.

It will be noted that during the grinding action of the apparatus as hereinbefore described a suitable cooling liquid is applied to the operative surfaces of the wheels and to the work, and in Fig. 2 is shown a pipe or conduit 69 for supplying fluid to the work. This Huid not only maintains the active parts of the apparatus cool, but also carries away with it the particles removed by the` grinding action from the work. It will be seen/that the casing 27 substantially entirely encases the actuating mechanisms therein -housed and thus effectively protects these mechanisms from the destructive eiects of the fluid and the particles carried rthereby. Referring now to;Figs. 2 and 4 of the drawings, it will be seen that the posts 46 and 47 are provided with downwardly extending skirts 46t and `47f respectively, each overlapping-laterally the |upwardly extending guiding sleeve formed in the upper part of the casing 27. The skirts 46I and 47f, moreover, are ofl sufficient extent to eli'ectively overlap the guiding sleeves 44 and 45, respectively, throughout substantially the entire relative movement thatl takes place between the sleeves and theirrespective posts. The ingress of' cooling fluid with its con'- tained particles to the actuating mechanisms is thus effectively prevented.

In Figs. 5 and 6 of the drawings I have shown amodied form of certain of the features of my invention. It mightvbe noted that parts of the vapparatus shown in these two figures which aresubstantially similar to the constructions hereinbefore described are denoted by like reference characters and will not now in detail be again described. Referring more particularly to Fig. 5, note `might be made, however, that the operative" ilo more distant *from* each other at the Vlefthand end-.than at the right-hand end as viewed in this figure. It will be recalled that in Fig. 3 the opposed operative portions of the two wheels are related to each other in the reverse manner, that is, they are nearer-to each otherv at the left-hand end than at the right.- The work :support 48 for example, when work of smaller diameter and wear strips 51, 51b and 51 are related 13 to each other and to the other mechanisms as already hereinbefore described. Similarly, also, in Fig. are shown the guide -and 67, and reference to Figs. 5 and 6 will readily show that this end may be conveniently adjusted lengthwise of the guiding path formed between the guide plates 66 and 67, a lock nut 7 2a serving conveniently to lock the stop in desired position.

In the operation of this apparatus the work support48 is first moved outwardly between the approaching operative surfaces of the two wheels whereupon the work, herein again illustratively setforth as a drill 52, is placed upon the work support 48 with part ofthe operative section 52a of the work 52 resting-between the guide plates 61 and 62, the latter functioning thus to temporarily support the work on the work support 48. Preferably the shank 52b of the work 52, which shank portion it is desired to grind cylindrically as distinguished from the tapered form desired to be given the section 52, is maintained in position on the work support 48 well within the range of the operative surfaces of the two wheels.

The work support 48 is thereupon moved inwardly between the approaching surfaces of the two wheels as hereinbefore described, thus presenting the work to the opposed operative portions of the surfaces which, as above noted, progressively approach each other in a direction from left to right as viewed in Fig. 5. The regulating wheel 21 thereupon controls the rotation of the work 52 during the action thereon of the grinding'wheel 22, but the regulating wheel 21 also acts to feed the work 52 toward the right as viewed in Figs. 5 and 6. The righthand end portions of the operative portions of the two surfaces are thus effective to grind the shank portion 52b substantially cylindrically as it travels in the above-mentioned direction, the shank 521 einer -ng from the ends of the operative portions nearest to eachother. During this action .it will be notedthat the section 52`L of the work 52, which section itis desired to grind in tapered form, is gradually fed in thed'.-

rection along its axis and into the angle formed by the operative portions of the surfaces. The section 52" of the work is'thus operated upon and ground Ainto tapered form, the feeding action upon the workbeing halted or limited by the adjustable stop 72 against which the work 52 abuts when brought into the position shown in Figs. 5 and 6. Preferably the stop 72 is so adjusted that the feeding action is terminated when the left-hand end of the work 52 vhas been brought just within the opposed operative portions of the two surfaces,.that section of the work 52 being thus held between these operative poitions being ground to the desired tapered form.

The work support 48 is thereupon moved outwardly in the manner hereinbefore described to carry the work 52 out of operative relation from the opposed portions of the two surfaces, the guide plates 66 and 67 between which the shank 52b of the work has beenfed during the actions hereinbefore described acting to hold the work in position upon the work support 48 during this outward movement. The work is thereupon removed, Whence the cycle of operation is repeated. y

It may be noted that the desired angular relation between the opposed operative portions of the two surfaces, which relation acts materially to determine the degree of taper given the work, may be attained in any suitable manner, as for example by suitable truing devices known in the art, or any other convenient manner.

It will thus be seen that there has been provided in this invention an art and apparatus in which the several objects of the invention hereinbefore noted and many advantages are effectively achieved. It will be noted that the apparatusis of rugged and i durable construction, is of convenient and simple manipulation, and is well adapted t0 meet the conditions of hard, practical use.

As many possible embodiments may be 4 made of the mechanical features of the above invention and as the art herein described might. be varied in various parts, all without 11 1- 4 departing fromfthe scope of the invention, itis lto be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

I claim as my invention:

1. In apparatus of the general nature of that -herein described, in combination, a grinding wheel rotatable at relatively high speed, a regulating wheel rotatable atrelatively low speed, said wheels being ada ted tov present approaching operative sur aces traveling in opposite directions and to pre-A sent opposed operative portions for actionv `upon work presented thereto, work supportlng means adapted to be moved to posi-.

tion work supported thereon in or outA of operative relation to the operative portions of said surfaces, the path of travel of the operative surface of said regulat-v ing wheel being inclined with respect to mamas i thepath of travel of work along said supporting means, means for preventing work on said work supportin means from contacting with said grindlng wheelprior to movement of said supporting means inwardly to present the work to said operative por'- tions ofsaid two wheels, and guiding means associated with said supporting means and arrangedto receive said 'work as it is fed out of operative relation to said two wheels by said regulating wheel.

2. The herein described art which consists in placing a work piece of round section upon a movable work support which extends l5 between the approaching operative surfaces of a grinding wheel and a regulating wheel, the path of travel of the operative surface of the regulatinrrI wheel being inclined to the path of travel of the work in a general axial direction, moving thework support in a direction substantially transverse of itself to 'carry the work piece into operative relation to the opposed'operative portions of the" two wheels, and then permitting the regulating wheelto feed the work piece 1n a` general aXial direction,- l

l 3. The herein described'art which consists in placing a lwork iece of round section upon a movable wor support extending between the approaching operative surfaces of a grinding wheel and a regulating wheel, the path of travel of the operative surface of the fregulating wheel beinginclined to the path of travel ofthe work piece in a general axialdirection, and lthe two wheels having adjacent operative portions` more distanty from each other at v011e end thereof than at the ether, moving the work support ina direction substantially transverse of itself to car- 0 `ry the work piece into operative relation to the opposed operative portions ofthe two wheels so that the latter act to reduce a portion of the workpiece to substantially tapered form, and in permitting the regulating wheel to move the work piece in an axial direction so thatthe least distant parts ofthe opposed operative portions of the two wheels will reduce `"another 'portion' of the Work piece to substantially cylindrical form.

4.' In apparatus of the igeneral nature of that herein described, in combination, la pair of wheels one of which has an abrasive active surface, ymeans mounting said wheels to .present operative surfaces approachin each other in one plane, said wheels being a apted to present coactingoperative portions in greater proximity to each lother at one end than at the other ina plane making anangle with said other plane, a work support extending between said wheels arranged to support work thereon with a section of the work extending exteriorly of said opposed operative portions of said wheels and means for moving said work support inwardly between -6" ysaid approaching operative surfaces andtobring the work thereon into operative rela- Y tion to said operative portions of said wheels with a section of said work extending exte- -rior of and beyond the one end' of said 0perative portions. V

5. In apparatus of the general nature of that herein described, in combinatiornla grinding wheel adapted to be rotated at a iml wheel making an angle with the path of l travel of said body along saidsupporting means, said regulating wheel acting to control the rotation of said body during action thereon by said grinding wheel and saidoperative portion of said grinding 'wheel acting to grind a section of vsaid body greater in diameter at one end thereof than at the other and that portion of said grinding wheel of least distance 'from the operative portion of said regulating Wheel acting to grind cylindrical another section of ,said body as said regulating Wheel feeds said body -along said supporting means.

6. In apparatus 'of the general nature o f that. herein described, `in combination, a grinding wheel rotatable at a relatively high speed, a regulating wheel rotatable at a relatively low speed, said wheels being adapted posite directions and to present operative portions of said surfaces of progressively increasing distance of separation, means 'for supporting a substantially round body betweensaid wheels with a section of said body .to present operative surfaces traveling in opinoperative .relation to said operative portions, of said wheels and with another section Vof said body extending exteriorly of said operative portionsv and 'beyond the ends thereof of minimum separation, the path of travel ofthe operative surface of saidregulating wheel making an angle with the pathY of travel of said bodyy along said supporting means wherebysaid regulating wheel acts to feed said body along said' supporting means'and in adirection toward thel ends of saidoperative portions of said surfaces of maximum separation.

7. In apparatus 'of the1general nature of that :herein described, in combination, a grinding wheel rotatableat a relatively high speed, a regulating wheel rotatable at a relatively low speed, said wheels being adapted to present operativev surfaces traveling in o opposite directions and approaching each otherin one direction and to present opern ative portions of said surfaces of progres-- sively increasing distance of separation, and means for carrying a substantially round body between saidapproaching operative surfaces and for supporting said body with a section thereof in operative relation to said operative portions and with another section of said body extending exteriorly of said opposed operative portions and beyond thc` ends thereof of minimum separation, the path of travel of the operative surface of said regulating wheel making an angle with the path of travel of said path along said supporting means whereby said regulating Wheel acts to feed said body along said carrier and in a direction toward the ends of saidoperative portions of maximum separation.

8. In apparatus of the general nature of that herein described, in combinatioma pair of coacting wheels one of which has an abrasive active surface, said wheels beingY adapted to present approaching operative surfaces and `to present opposed operative portions thereof to work presented thereto, a work rest extending between said wheels, and means for giving said work rest a relatively rapid movement between said approaching operative surfaces andin a direction substantially transversely of itself,

thereby to carry Work positioned thereon into or out of operative relation to said opposed operative portins of said wheels, said means being arranged to maintain said work rest substantially parallel to itself throughy out its movement.

9./In apparatus of the general nature of that herein described, in combination, a pair of coacting wheels one of which has an abrasive active surface, said wheels being adapted to dpresent approaching operative surfacesan to present opposed operative portions thereof more distant from each other at one end than at the other, means forl carrying work inwardly between said approaching operative surfaces and for supporting said work in operative relation to Said opposed operative portions of said y Wheels for operation thereon to grind said Work larger at one end thereof than at the other, and means for limiting the inward movement of said supporting means.

10. In apparatus of the general nature ofj that hereln described, in combination, a grinding wheel rotatable at a relatively high speed, a regulating wheel rotatable at a relatively lowv speed, said Wheels being adapted to present operative surfaces traveling in opposite `directions and approaching each other and to present operative portions of said surfaces of progressively increasing distance of separation, and means for carrying memes asubstantially round body inwardly in a direction substantially transverse of the axis of said body between said approaching operative surfaces of said wheels and for supporting said body' in operative relation to said operative portions of said surfaces, said regulating Wheel governing the rotation of said body on said supporting means while said grinding Wheel acts to grind said body larger at one end than at the other.

ll. In apparatus of the general nature of that herein described, in combination, a grinding wheel rotatable at a relatively high speed, a regulating wheel rotatable at a relatively low speed, said wheels being adapted to present operative surfaces traveling in opposite directions andapproaching each other and to present operative portlons of said surfaces of progressively increasing distance of separation, means adapted to support a body having a circular section in operative relation to said wheels, and actuating means for giving said supporting means with said body thereon a relatively rapid movement inwardly between said approaching surfaces thereby to present said body to said operative portions of said surfaces, said regulating wheel governing the rotation of said body on sald supporting means while said grinding wheel grinds said body larger at one end than at the other.

12. In apparatus of the general nature of that herein described, in combination, a pair of coacting wheels one ofwhich has an abrasive active surface, said wheels being adapted to present approaching operative surfacesand opposed operative portions thereof for action upon work presented thereto, meansy extendingsubstantially between saidwheels for supporting work in operative` relation to said wheels, actuating means for moving said supporting means inwardly between said approaching surfaces to present said work to said operative portions of said surfaces for operation thereon, and separate means each adapted to coact with one end of said supporting means for limiting the inward movementof said supporting means. V l s 13. In apparatus of the general nature vof that herein described, in combination, a pair of coacting wheels one of which has an abrasive active surface, said wheels being adapted to'present approaching operative surfaces and opposed operative portions of said surfaces for action upon Work presented thereto, mea-ns extending between the operative surfaces of said wheels for supporting work thereon, and actuating means in engagement substantially with.- the ends rection between said approaching operative surfaces -of said wheels to position work supported on said supporting means in or abrasive active surface, said wheels being adapted to present approaching operativesurfaces and opposed operative portions of said surfaces for action upon work presented thereto, means extending between the operative surfaces of said wheels for supporting Work thereon, means having an inclined surface adapted upon movement thereof to raise or lower said supporting means between said wheels tov position work thereon into or out of operative relation to the operative por tions of said surfaces, and means for giving. said last-mentioned meansI -a substantially rapid movement thereby to raise or lower saidl supporting means.

15. In apparatus of the general nature of that herein described, in combination, a pair of coacting wheels one of which has an abrasive active surface, said wheels being adapted to present' approaching operative surfaces and opposed operative portions of said surfaces for action upon work presented thereto, means extending between the operative surfaces of said'` wheels for supporting work thereon, means. having an inclined surface coacting with said supporting means adapted upontmovement thereof to move said supporting means in substantially a vertical direction to position work thereon into or out of operative relation to the operative ortions of saidsurfaces, a rack associated) with said last-mentioned means, and a rotatable gear meshing with said rack for moving said last-mentioned means.

16. In apparatus of thegeneral nature of .that herein described, in combination, a pair of coacting wheels one of which has an abrasive active surface, said wheels being adapted to present approaching operative surfaces and opposed operative portions of said\surfaces for action upon work presented thereto, means extending between the operative surfaces of said wheels for supporting work thereon, a pair of vertically movable postsl one on each side of said wheels and each adapted to support one end of said supporting means, and means for simultaneously moving said posts thereby to position work on said supporting means into 4 lor out of operative relation with the operative 'portions of said surfaces. A 17 In apparatus of the general nature of that hereln described, in combination, a pair Iof coacting wheels one'of which has an abrasive' active` surface, saidl wheels being adapted v present approaching operative surfaces and opposed operative portions of Vof 'coacting wheels one of which Ito position work thereon into or out of operative relation to the operative portions of said'surfaces, and means for moving said last-mentioned means.

18. In apparatus of the general nature of that herein described, in combination, a pair of coacting wheels one of which has an abrasive active surface, said wheels being adapted to present approaching operative surfaces and opposed operative portions -of saidsurfaces for action upon work presented thereto, means extending between the operative surfaces of said wheels for supporting work thereon, a pair of vertically movable posts onel on each side of said wheels, means for adjustably securing said supporting means to each of said posts, and means for simultaneously moving said posts in a vertical direction. l

l19. In apparatus of the general nature of that herein described, in combination, a pair hasan abrasive activesur'faoe, said vwheels being adapted to present approaching operative surfaces and opposed operative portions of.

lio

abrasive active surface, said wheels being v adapted to present approaching operative surfaces and opposed operative portions of saidl surfaces. for action upon work pre' sented thereto, means extending between the operative surfaces of said'wheels for supporting work thereon, positively acting` means'for moving said supporting means substantially vertipally in one direction be tween the operative surfaces of said wheels, and yielding means for opposing the action of said` last-mentionedl means.

21. In apparatus of the general nature of that herein described, in combination, a pair of coacting wheels one of which has an abrasive active surface, said wheels being adapted to present approaching operative surfaces and opposed operative portions for action upon work positioned therebetween, lwork-supporting means adapted to be moved inwardly between said approaching surfaces to position work supported thereon to said operative portions, means for limiting the extent of inward movement of said supporting means, and continuously acting means operative upon said supporting means to insure movement of the latter to the extent determined by said limiting means.

22; In apparatus of the general. nature of that herein described, in combination, appair of coacting wheels one of which has an abrasive active surface, said wheels being adapted to present approaching operative surfaces and opposed operative portions for action upon work positioned therebetween, work-supporting means adapted to be moved inwardly between said approaching surfaces to position work supported thereon to said operative portions, movable means having an inclined surface coacting with said, supporting means and adapted upon movement thereof in one direction to move said supporting meansl outwardly and besaid reverse direction.

23. In apparatus of the general nature of that herein described, in combination, a pair of coactin wheels one of which has an abrasive active surface, said wheels being adapted to present'approaching operative surfaces and opposed operative portions for laction upon work positioned therebeas predetermined by said adjustable means.

24. InA apparatus of the general nature of that herein described, in combination, a pair ofcoacting lwheels one of which has an abrasive active surface, said wheels being adapted to present approaching 'opera- .tive surfaces and opposed operative portions for action upon Work positioned therebetween, work-supporting means adapted 'to be moved inwardly between said approach ing surfaces to v position work supported thereon to said operative portions, movable means having an Ainclined surface coacting with said supporting means and adapted upon movement thereof in one direction to move saidsupporting means outwardly and between more distant parts ct' said approaching surfaces and upon movement in reverse direction to permit movement oli said supporting means in reverse direction, means7 for limiting the movement of said supporting means in said reverse direction, and spring means for insuring said reverse movement to the extent determined by said limiting means. v

25. In apparatus of the general nature of that herein described, in combination, a pair of coacting wheels one of which has an abrasive active surface, said Wheels being adapted to present approaching operative surfaces and to present opposed operative portions for action upon work presented thereto, means extending between said wheels for supporting work thereon adapted to be moved between said approaching operative surfaces to present said work to said operative portions vof said surfaces, and means in engagement with said supporting means at two spaced points therein for moving said supporting means to position work thereon into or out of operative relation to the operative portions of said surfaces.

26. In apparatus of thel general nature of that herein described, in combination, a grinding wheel adapted'to be rotated at a relatively high speed, a Work support for -supporting a body in operative relation to said grinding wheel, said Work support having a vertically extending post, a vertically extending sleeve-like member-for receiving and guiding saidl post, means for moving said post in a vertical direction within said sleeve-like member, and protective means associated with said downwardly to substantially envelop the upper end of said sleeve-like member throughout the range of vertical movement of said post therein. o

27. In apparatus of thel general nature of that herein described, in combination, a grinding wheel, a work support adapted to support work in operative relation to said grinding wheel, a, vertically movable post, means mounting said work support upon the upper end of'said post, and a vertically post and extending extending sleeve-like member for receiving and guiding said post throughout its range of movement, said post being provided with a circumferentially extending skirt member adapted to' overlap the upper end'of said sleeve-like member throughout the range of movement of said post.

28. In apparatus of the general nature of that herein described, in combination, a grinding Wheel adapted to be rotated at a relatively high speed, a regulating wheel adapted to be rotated at a relatively low speed, said wheels being adapted to present l operative relation to said wheels, said Work support having associated with it a downwardly extending member, means for moving said supporting member in a vertical direction, a vertically extending Way for guidingl said downwardly extending member throughout the vrange ,of movement thereof, and protective means associated with said downwardly extending member for overlapping in a lateral direction said In apparatus of the general nature of vthat herein described, inf-combination, a

grinding'` wheel rotatable at a relatively high speed, a regulating wheel rotatable at a relatively low speed, said wheels being adapted to present operative surfaces traveling in opposite directions, a work support extending between said wheels forsupporting work in operative relation thereto, movable means having .an inclined surface coacting with said Work support adapted up on. movement thereof kto -move said work support in4 a vertical direction, and means.

for substantially entirely encasing said movable means.

30. In apparatus ofthe general nature of that herein described, in combination, a grinding wheel rotatable at a relatively high speed, a regulating wheel rotatable at a relatively low speed, said wheels being adapted to Jresent operative surfaces traveling in opposite directions, a work support 'extending between saidA wheels for supporting work in operative relation thereto, a

casing having a longitudinally extending `guiding way, movable lmeans having upon `the upper portion thereof an inclined sur-l face mounted within said guiding way, said ncasing having-'an opening therein for expos- `ing said inclined surface, means connected with said work support and extending through said opening for engagement wit .said inclined surface whereby upon move- .ment -of the latter said work support is moved ina vertical direction, andlaterally extending means associated with 'said lastmentioned means for overlapping said casing adjacent said opening. I

31. In apparatus of the general nature of that hereinl described, in combination, a grinding wheel rotatable at a relatively high speed, a re'gulating wheel rotatable at' a relatively low speed, said .wheels being adapted to present operative surfaces traveling in opposite directions, a work support extending between said wheels for supporting work inoperative relation thereto, a casing having a longitudinally extending way, movable means having an inclined .surface Amounted within'l said casing and slidable withinsaid waypsaid casing havl.ing an opening therein for exposing said i lngfat its lower end with said inclined surface whereby upon movement of the latter said work support is moved vertically `and said post is guided within said vertically extending sleeve, and protective means associated with said post for overlap ing theupper end of said sleeve throug out subtantially the range of movement of said pos 3 2. In apparatus of the general nature of 80 that herein described, in` combination, a grindin wheel adapted to be rotated at a relative y high speed, a regulating wheel adapted to be rotated at a relatively low speed, said wheels being adaptedto present operative surfaces traveling in opposite directions, Work-supporting means extendt ing between said wheels for. supporting work in operative relation to said wheels, a plurality of wear strips associated in endwlse relation upon said supporting means,

and means for independently vertically ad- Justing each of said wear strips with respect to said supporting means.

33. In apparatus of the general nature of -between said wheels and adapted to be moved inwaidly between said approaching operative surfaces to present work to said opposed operative portions` of said surfaces, and guiding means associated with said supporting means for holding work on s aid supporting vmeans when the latter is moved to 1hold sa1d work out of operative relation no" tosaid operative portions of said surfaces during the movement thereof.

34,. In apparatus of the general nature of that herein' described, in combination, a

grinding wheel adapted'to be rotated at a 115 relatively high speed, a re atin wheel adapted to be rotated at a vgi'ltlellativly low speed, said Wheels being adapted to present approaching operative surfaces traveling in opposite directions and to present op- 12 posed operative portions for Vaction upon work presented thereto, work-supporting t means adapted to be moved tov position work supported thereon in or out of operative re ation to the'op'erative portions of said surfaces, the ,path oftravel of the operative surface of said regulating wheel making an angle with the path'- of travel of work along said supporting means, guiding ,ab 'means associated with said supporting means and upon one side of said Wheels for Wheels for receiving saidwork as it is fed holding Work on said supporting means outof operative relation to said operative prior to moving of said supporting means portions. fl mwardly to present Saud work to sold opera In tostlmony whereof, l have slgned my tive portions of said Wheels, and guiding name to this specioation this 29th day of means associated with said supporting July, 1922. means and upon they other side of said. LEWIS R. HEIM.

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