US1590190A

US1590190A - Grinding

Info

Publication number: US1590190A
Application number: US669651A
Authority: US
Inventors: Lewis R Heim
Original assignee: HEIM GRINDER Co
Current assignee: HEIM GRINDER Co
Priority date: 1923-10-20
Filing date: 1923-10-20
Publication date: 1926-06-29
Anticipated expiration: 1943-06-29

Description

June 29 1926.

L. R. HEIM.

enmmnq Filed Oct. 20. 1923 3 Sheets-Sheet 1 01): INVENTOR BY mm mm ATTORNEY Patented June 29, 1926. l

UNITED STATES PATENT OFFICE.

turns a. mim.

OF DANBURY. CONNECTICUT, ASBIGNOR TO THE ERIN GRINDER:

COMPANY, OF DANBURY, CONNECTICUT, A CORPORATION 01 CONNECTICUT.

GRINDING.

Application filed October 20, 1923. 7 Serial No. 669,651.

.This invention relates to grinding and more particularly to apparatus for grinding articles or bodies having a round or this invention is to provide practical grindlowing claims.

ing apparatus for grinding ooncentricall various portions of work having correspon ingly non-uniform diameters or different diameters. Another object is to prov1de apparatus of the above nature that may be readily adapted to meet the varying conditions. inherent in bodies or wor of this character. Another object. is to provide apparatus of the above character that will be ca able of high speed of operation and hi b y accurate inits action and results. Qt er objects will be in part obvious or in part pointed out hereinafter. The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts as will be exemplified in the structure to be heremafter described and the scope of the ap lication of which will be indicated in the o In the accompanying drawings in which is shown one of the various possible embodiment of this invention,

Figure 1 is a plan view of the apparatus in assembled relation, certain parts bein broken away to show certain features 0 construction more clearly,

Fi "re 2 is a side elevation on an enlarged scale of the work supporting means, and more particularly is a side elevation as viewed along substantially the line 2-2 of Fi re 1.

igure 3 is a plan view of the apparatus shownin Figure 2, and

Figure 4 1s a lan view on an enlarged scale of an auxi iary device shown in relation to another characterof work, adapted for use in connection with grinding the latter. 7

Figure 5 is a view on an enlarged scale taken along the line 5-5 of Figure 2, and

Figure 6 is a similarly enlarged view taken along the line 6-6 of Fi re 2.

Figure 7 is an enlar' ed sectional view taken along the line 7-- of Figure 2, and 'Figure 8 is an enlarged sectional view taken substantially along the line 8-8 of Fi re 2.

igure 9 is a diagrammatic perspective view of part of the a pa'ratus shown in Figure .1 together wit a diagrammatic representation'of certain of the operative mechanisms omitted and broken away in Fi ure 1.

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

Referring now to the drawmgs, and more particularly to Figure 1, there is shown at 10 a main supportm frame of any suitable construction and height, and rovided in its upper part with suitable pans of ways 13 and14 extending longitudmally thereof for guiding the carriages 11 and 12 respectively len hwise of the frame 10. The adjacent en s of the carria s 11 and 12 support airs of transverse y spaced bearin 15 an 16 respectively adapted to rotatabl support the shafts 17 and 18. The shaft 1 the'carriage 11 and the frame 10 overhan at the rent parts thereof and upon this overhanging end thereof is sup orted to rotate, with the shaft 17, a grinding wheel 22. The shaft 17 has mounted upon it,.and intermediate of the bearing 15 an elongated pulley 19 adapted to be driven by means of the belt 21 from any suitable source of owe'r. The grinding wheel 22 may thus e driven at a suitable grinding speed and is rotated in the direction of the arrow indicated in Figure 1.

The shaft 18, supported in'the bearings 16 of the carriage 12, supports at its overhanging end at the front art of the machine what will hereinafter termed a re ulating wheel 24 which wheel convenient y and preferably is made of a suitable abrasive material. A pulle 26 mounted upon shaft 18 and interme late of the spaced bearings 16 is connected to any suitable source of power by'means of a belt run- 105 22 is driven, and moreover, the regulating wheel 24 is rotated in such a direction that its operative surface, adjacent the operatlye surface of the grindin wheel 22, trayels m a direction opposite om the d1rect1on of travel of the surface of the grlndm wheel 22. In Figure 1 these directions 0 travel of the adjacent operative surfaces of the two wheels are clearly indicated by arrows, and'from Figures 7 and 8 it will be noted that the grinding wheel surface 1s thus made to travel downwardly with respect to a vwork carrier 25 interposed between the two wheels and to be more clearly herelnafter described, and that the regulating wheel 24 is thus made to present an oper ative surface which travels upwardly with." res ct to the carrier 25.

e operative surfaces of the two

wheels

22 and 24, indicated respectively at 22' and 24, are-arranged in approachm relation with respect to one another, an th s relation is preferably and most convcmently attainedby making both wheels of a type having peripherally operative surfaces. t this point it may be noted that the regulating wheel 24 is preferably and advantageously arranged with respect .to the work supporting means so that there exists "a relative inclination between the path of travel of the operative surface of the regulatmg wheel 24 and the tangent line of contact of the work with the surface of the grinding wheel. By providing such a relative inclination, the regulatm wheel 24 1s effective to urge the work a ong the carrier and in a direction toward the rear of the aparatus as viewed in Figure 1, and as ndicated by the arrow 25. This relat ve in,- clination is preferably obtained by inclining the axis of rotation of the regulatm ulating wheel takes t e form of a peri herally active wheel as here illustrated. Thus the forward bearing 16 ad acent tne regulating wheel 24 may be made of higher elevation than the rear bearing 16 remote from the regulating wheel 24. In Figure 2 of the drawings, as well as in Figure 3, this relation of the regulating wheel 24 is more clearly shown.

As shown in Figure 1,-the

wheels

22 and 24 are substantially enclosed in a protective casing 29, inasmuch as they are operated with an application thereto of some suitable cooling fluid such as water. The casing 29 is secured to the front part of the main frame 10 in any suitable manner and is of sufiicient lateral and longitudinal expanse to permit of the adjustment and movement of the wheels as will be more clearly hereinafter described. At a point substantially intermediate of the two

wheels

22 and 24 and below their adjacent operative surfaces, this casing 29 is formed to provide a substantially horizontally extending bridge ortion 29 (see Figure 2) u on which rid e portion 29 'is su orte a frame mem er 30 detachably hel in place as by an angle plate 31 having a horizontally extending portion 31 member 30 may be secured, and having also a downwardly extending portion 31 adapted to be detachably secured, as by the clamping screw 31 passing therethrough and into the bridge portion 29 of the easing 29. The frame in Figure 3, and as will be clear from Fig ure 2, extends between the two wheels and supports two vertically extending

posts

30 and 30". one on each side of the two wheels. These

posts

30 and 30 support an elongated auxiliary frame member 32, taking the orm preferably of a bar which is conveniently of rectangular cross-section. The

posts

30 and 30" are slotted vertically as is clearly shown in Fi re 2 and through these slots and through t e auxiliary frame member'32 pass the clam ing bolts30 and 30 respectively. By t is construction, the frame member 32 may be vertically adjusted with respect to the operative surfaces of the two wheels, and it will be noted that the vertical adjustment of each end of the frame member 32 may be made independently of the corresponding adjustment at the other end ther'eof. Thus, the frame member 32 may be given any desired degree of inclination with respect to the horizontal as viewed in Figure 2 and which adjustment may be demanded by the particular conditions of use.

At the forward end ofthe frame member 32 and as shown in Figures 2 and 3 at the left hand end thereof, there is mounted a g bracket, generally indicated at 33, having wheel 24 in the vertical lane where the reg-- a lu 33 extendin in the general direction of t e frame mem er 32 and ada ted to be secured thereto as by means of t e clamping screw 33". The clamping screw 33" is preferably threaded into the frame member 32 and passes through a vertically "extending slot 33 in the lu 33. Thus the bracket 33 may be not on y vertically ad- 'usted with respect to the frame member 32, ut also pivotally adjusted about the screw 33 as anaxis. The bracket 33 is formed to provide a transversely extending plate member 33 (see also Fi res '5 and 6 in general of a rectangular s ape, and pro ecting rearwardly therefrom and at the upper portion thereof is a lug 33' into which is threaded an adjusting screw 33" adapted to contact with the upper surface of the frame member 32, the latter being conveniently recessed as at 32 to accommodate the lug 33' and its associated adjusting screw 33. The adjusting screw 33" through the lug 33' acts not only to assist in rigidly supporting the bracket 33 with respect to the frame member 32, but also to permit a micrometer to .which the frame member 30, as is shown' r with respect to iary 34, more clearly shown in This plate member 34 an

ers

35 and 36 respectively,

adjustment of the bracket 33 to be made the frame member 32.

The front plate 33 of the bracket 33 has adju'stably mounted thereon a plate member Figures 6 and5. ports at its opposite u per ends a pair 0

studs

34 and 34" upon w liCll are rotatably mounted the rolladapted to suport one end of the work piece eneral Indicated at 37 The rollers 35 an 36 have rigidly connected at their left hand faces as viewed in Figure 2 the

gears

34 and 34 respectively, so that the rollers may be rotated or driven through their res ective gears. The

gears

34 and 34 mes with gear 38 supported upon a stud 34 substantially centrally positioned with respect to the late member 34. The gear 38 in turn is driven from a ear 39 rotatably supported upon a stud 34 rigidl mounted 1n the lower end of the plate -34 see Figures 5 and 6). The gear 39 is adapted to be driven through a sleeve 39' at the outer end of which (see Figures 2 and 3) is mounted a pulley 68. The pulley 68 (see Figure 1) is adapted to be driven by means of the belt 68 selectively connected to any one of the ste s of a cone pulley 68 mounted upon a she t 18' formmg a forwardl directed extension of the re lating whee shaft 18.

he work suplporting rollers 35 and 36 (see Fi ure 5) t us in effect may of themselves etermine the axis about which the one end of the work 37 rotates and moreover may take part, through the driving mechanism above described, in rotating the work 37. As illustrative of the character of the work adapted to be operated upon, the work may, for example, comprise a shaft member as shown in Figures 2 and 3 in which the

respective end portions

37 and 37 are to be ground concentrically with respect to one another. The member 37 is shown illustratively in these figures in the form of an axle member in which the end portion 37' is to be reduced or ground to a shape of uniform diameter throughout, whereas the other end portion 37 is to be ground to tapered form.

As hereinbefore described, the rollers 35 and 36 (Figure 5) support one end of the work and in effect determine the axis about which this end rotates. As iliustratively shown, the

rollers

35 and 36 and their associated mounting mechanisms are arranved to sup ort the cylindrical end 37 as distinguis ed from the tapered end portion 37". Considering now the manner in which the other end portion (37") is presented to the wheels and supported therebetween for operation thereon, it will be noted that the auxilframe member 32 is under cut on both sides thereof or reduced in section, as at 32",

intermediate of the

wheels

22 and 24. Moreover, also, an upper portion of the frame member 32 intermediate of the wheels is cut away to form a recess 32 extendin len thwise of the frame member 32. "he tom wall of the recess 32 is downwardly inclined to both the left and ri ht as viewed in Figure '2 to form what may e termed an apex at a substantially central point lengthwise of the recess 32", and at this apex is formed a transversely extendin seat in which rests a roller 32 upon whic is pivoted a carrier member 41. The carrier member 41 extends lengthwise of the recess 32 and as clearly shown in Figure 2 extends u wardly beyond the upper surface of the frame member 32. Referring now to Figure 8, it will be seen that secured to either side of the carrier member 41, as by the screws 41 are the downwardly extending plate members 41' and 41, one on each side of the carrier member 41. These plate members 41' and 41 extend downwardly into the lateral recesses 32 of the auxi iary frame member 32 and, in effect,.act to guide the carrier member 41 as it swin s about the pivoting roller 32, the latter eing interposed between the apex at the bottom of the recess 32 and a substantially central portion of the carrier 41. The side plates 41 and 41 are each provided with an arcuate slot 41 adjacent their lower ends, a screw 32 passing through these slots and into theframe member 32 in order to effectively hold the carrier 41 in assembled porting surface of the carrier 41, the latter, 7 1

y reason of its'rocking support, automatically accommodating itself to the tapered end 37* positioned thereon. At this point it may be noted that the same self-accommo dating action takes lace if the work piece 37 were reversed an the straighter cylindrical end 37 thereof positioned upon the carrier member 41. The upper supportingsurface 41 of the carrier member 41 (see'Figure 8) is preferably inclined downwardly toward the regulating wheel 24 in order to tend to urge the portion of the work 37 supported thereon toward the regulating wheel 24. A wear stgip 41 is preferably removably inserted in a suitable lengthwise extending recess in the upper portion of the carrier 41 in order that the wear on the carrievmember 41 may be concentrated in this wear strip 41 which is preferably of a suitably hardened material, it being noted wise with respect to t end of its possi 30 respectively. are extended through t e upper portions of that as one surface of the member 41 becomes worn, the member 41 may either be rotated to present one of its other surfaces for wear or may even be replaced.

In order, however, to insure positive control of the rotation of the work 37 by the regulating wheel 24, as well as to revent unintended contact of the work with the rindin" wheel 24, as will be more clearly ereinafter explained, the auxiliary frame member 32 has mounted thereon and adjacent the two wheels a bracket 69, as by the clamping screw 69". This; bracket 69, preferably positioned on the grindin Wheel side of the auxiliary frame mem'er 32, pivotally supports at 69 an arm 69 in the up er end of which is rotatably mounted a rol er 69. At the lower end of the arm 69, the latter is recessed as at 69 to provide a housing for a spring 69 which is interposed between the bracket 69 and the lower end of the arm 69. Preferably a pin 69 is rigidly mounted at the lower end ofthe bracket 69 to extend into the recess 69 to assist in holding the spring 69 in place. The spring 69 in tendin to expan ur es the roller 69 to the le as viewed in Figure 7, and the roller, in substantially non-frictionally engaging the work 37 urges the work 37 toward the regulating wheel 24, thus insuring the maintenance of the contact of the work 37 with the regulating wheel 24. 6

Turning now to Figure 2 of the drawings, it will be noted that the frame member 30 is bored out as at 30 preferabl throughout its longitudinal extent in or er to house therein an operating bar 70 preferably of circular cross-section, and provided.

at its forward and underside with a rack 70 adapted to mesh with a gear 70 suitably mounted at the forward and underside of the frame member 30.

The gear 70 is adapted to be manually ro tated by means of a handle 70', so that upon operation of the handle or lever 70, a sufii cient rotation of the gear 7 0 may be brought about to move the o erating bar 70 lengthe housing or frame 30.

In the position shown in Figure 2, the bar 70 occupies a position substantiall at the le movement to the aft.

The operating bar 70 is cut away at two spaced points in its upper portion in order to provide two inclined surfaces 70' and 70,

adapted to coact with the lower end portions 30' and 30 of the supporting posts 30' and The drtions 30 and 30 the housing or frame member 30, the latter being formed at these parts to provide suitable guiding portions, so that upon a movement to the right, as viewed in Figure 2, of the operating bar 70, the inclined surfaces 7O and 70 move the supporting posts, 30 and 30", respectively and hence the auxil- Lumen iary frame member 32 with the work u wardl as viewed in Fi re 2. As will 8 seen om Figure 8, sucli a movement carries the work 37 to a position between more distant portions of the-

operative surfaces

24 and 22 of the

regulating wheel

24 and 22 respectively, it being noted that during such movement, the portion 37 of the work 37 is effectively malntained out of contact with the grinding wheel 22. Such movement, in response to, for example, the manual operation of the operating bar 70 may thus be effective to carrythe work out of operative relation to the opposed operative portions of the two wheels, in order, at the completion of the desired grinding action, to permit the removal of the work from the apparatus. A new work piece may then be positioned as hereinbefore described, whereupon a reverse movement of the operating bar 70 is effective to carry the work downwardly and into operative relation to the.two wheels. A pair of springs 71*? and 72', connecting the movable frame member 32 with the fixed frame member 30, insure the maintenance of the desired eoacting relation between the supporting posts and the inclined surfaces of the operatin bar 70.

As hereinbe ore noted, the regulatin Wheel 24 is effective to urge the worfi lengthwise of itself and to the rear of the apparatus as shown in Figure 1, in addition to bringing about a control of the rotation of the work about its axis during the grinding operation thereon by the grinding wheel 22. It will noted that the work 37, being of cumbersome form, has only a relatively small portion thereof in operative relation to the wheels as compared with relieve the burden on the regulating wheel of rotating the heavy work piece 37 and materially aid or assist the regulating wheel. In this connection it might be noted that the

supportin rollers

35 and 36 may be driven at a suite. le speed through the belt 68" and the cone pulley 68 commensurate'with the speed at which the regulating wheel 24 rotates the work.

At the rear end of the auxiliary frame member 32 and as clearly shown at the ri ht hand end in both Fi ures 2 and 3, a brac et 71 on the frame mem r 32 has threaded into it so as to extend lengthwise of the frame member 32, a stop member '71 taking the form preferably of an elongated screw, the position of its left hand end being adjustable at will lengthwise of the frame member 32. A lock nut 71 may 'be employed to lock the work to the right (in Figluies 2 and 3 is thus effective to securely d the wor against'the stop member 71? during the rotation thereof b one wheel and the grinding action thereon y the other.

As is clearly shown in Figure 3 and also in Figure 1, it will be seen that the opposed operative ortions of the two wheels that is, substantia ly the tangent lines in which the two wheels contact with the work, make an angle with one another as viewed in the hor-' izontal plane. This relation may be obtained by suitably sha ing the regulating wheel 24 (see Figure 1 as by means of a suitable truing device 72, car ing a suitable truing tool such as a diamon and ada ted to be guided along a predetermined pat of travel to give the regulating wheele24 the desired shape. This angular relation between the opposed operative portions of the two wheels is desirable when work of tapered form is to be operated u on, it being noted that preferably the grinding wheel 22 is maintained, by means of a suitable truing apparatus 72 in substantially true cylindri- I cal shape for a urpose more particularly to be hereinafter ascribed, I

As viewed in both Figures 1 and 3, it will be seen that the regulating wheel 24 is substantiall sired to be operated upon. The grinding wheel 22 presents an o erative surface which is of less extent lengt wise of the auxiliary frame 32. In order to insure a high degree of accuracy, the normal accuracy of the two

wheels

22 and 24, due to their trued shape, is effectively combined with the high degree of accuracy resulting from a movement of the grinding wheel 22 lengthwise of .the work operated upon and in a direction substantially co-incident with the line of contact of the grinding wheel with the portion of the work operated upon. As hereinbefore noted, the grinding wheel shaft 17 is driven by the belt 21 riding over the broad-facedpulley 19. With this construction it will be noted that a substantial movement of the grinding wheel 22 in the direction of its axis may readily take place without disturbing the driving connection. and it may be here pointed out that the desired movement of the grinding wheel 22 lengthwise of the work is preferably brought about in this manner because of its relatively greater simplicity and convenience of construction.

broad-faced in order that it may well bac up the end portion of the work de- As seen in Figure 1, the rear portion of the apparatus .is broken away and for the sake of simplicity, this rear portion, to ther with the two wheels and their driving s afts, is shown in schematic perspective in Figure 9, 1t being noted, in so far as the actual'details of construction are concerned that reference may be had to my co-pending appliiaggn, Serial No. 669,693, filed October 20,

Turning now to Fi ure 9, it will be seen that at the rear end 0 the regulating wheel shaft 18 the latter carries a helical gear 33. whichmeshes with and drives a helical gear 34 driv ng the shaft 42 suitably supported in convenient bearings. At the left hand and of the shaft 42, the latter carries a crank disk 46 which bears a diametrically extending T-slot 47 in which is adjustably mounted a crank pin 49. The crank pin 49 engages in the slot 64" of an oscillating member 64 preferably supported for oscillating movement upon and about a shaft 52 extendmg lengthw1se of the main frame and at the rear thereof. Thus as the crank disk 46 rotates, 1t being noted that the slowly driven regulating wheel 24 forms a convenient low speed source of ower, the arm 64 is oscillated back and orth about the axis of the shaft 52, the extent of its oscillating move ment being determined by the throw of the crank pin 49. i

The shaft 52 has rigidly secured thereto and adjacent the arm 64, a crank arm 63 carrying at its upper end an arcuate slot 63" through which extends a in rigidly mounted in the upper end of? the oscillating arm 64. Thus as the latter is oscillated by the crank pin 49, the connecting pin 65 transmits the oscillating movement of the arm 64 to the arm 63, the latter in turn swinging with it the upwardly extended arm 56 to which the rear end of the grinding wheel shaft 19 is connected. Thus, assuming that the pin 65 is locked with respect to the crank arm 63, as by means of the two 0 pcsitely mounted adjusting screws 63 an 63 threaded into the opposite endsof the arm 63 and having their end portions extending into the respective ends of the slot 63", the crank arm 63 will be oscillated in exact unison with the oscillating arm 64". Such action, turning now to Figures 1 and 3, is effective to reciprocate the grinding wheel lengthwise of the work operated upon, it being notedthat the length of the stroke of the wheel may be adjusted by adjusting the throw of the crank pin 49.

The conditions of operation may also find it advantageous to permit a pause to take place at the end of a stroke in the movements of the grinding wheel 22 lengthwise of the work. This may be achieved by backing off th screws 63 and 63 away from Y the grindin one another, thus making a lost-motion connection between the pin and the crank arm 63. The length of the pause at the end of a stroke may be readily predetermined by adjusting the effective length of the slot 63 by means of the screws 63 and 63'. Any shortening in the length of the stroke of movement of the grinding wheel 22, resulting from the inter-positioning in the mechanism of the lost-motion connection, may be compensated for by increasing the stroke of the crank pin 49.

From the foregoing it will be clear that the efiective length of the slot 63 may be readily and conveniently predetermined. It will also be noted, however, that the position of the elfective slot may be likewise predetermined by the relative adjustment of the

screws

63 and 63 with respect to the crank arm 63. The elfective slot, the ends of which are predetermined by the ends of the

screws

63 and 63, may in effect be moved transversely of the crank arm 63, thus predetermining also the locus of operation or of movement of the grinding wheel 22 relative to the work.

Where the wheels are so related one to another, as herein illustratively set forth, that the opposed operative portions of the two wheels make an angle so as to permit the grinding of work to tapered form (as the end portion 37* of the work 37, for ex ample) and in order that the path of movement of the grinding wheel 22 may be properly related to the worlc operated upon, the axis of the work should occupy a position such that, as viewed in Figure 3 for example, it lies in a vertical plane bisecting the angle between the operative portions of the two wheels. When so related with respect to the two wheels, the tapered portion of the work will be effectively acked up by the re lating wheel on the one side thereof, an the o posite side of the work will be substantial y aligned with the path of movement of the grinding wheel 22 relative to the work. In order that this relation may be readily brought about, the frame member 30 is pivoted to the angle plate 31 as at 73 (see Figures 2 and 3) whereby the frame member 30 together with the auxiliary frame member 32 and associated devices may be swung in a substantially horizontal plane and about the pivot 73 so as to brin the axis of the work 73 into substantial y the bi-secting vertical plane of the angle between the operative contacting portion of the wheel 24 and the path of travel lengthwise of the work of the operative contactln portion of wheel 22. Suitab e clamping screws 73* t readed into the frame member 30 and assing through suitable slots 73" in the plate portion 31 of the angle member 31 may be employed to lock the frame member 30 and associated justed sition. At this oint it ma be noted t at, where the end portion 0 the work 37 is to be ground to true cylindrical form, (12s for exam le the portion 37" of the wor piece 37) t e above mentioned adjustment may be utilized to properly align the end portion of the work with the operative portions of the two wheels, which, in this case, will be substantially parallel one to another.

In order that the above described adjustment of the position of the ortion 37 of the work 37 with respect to the wheels may be accurately made, provision is made for br nging about amicrometer adjustment of the exterior end portion of the work 37 laterally with respect'to the inner portion of the work presented for operation thereon b the wheels. Thus, referring more arparts into adticularly to Figures 5 and 6 and also to i ure 2, it will be noted that the plate li e bracket 34 is secured to the plate member 33 of the bracket 33 by means of the two clampmg screws 34iand 34" threaded into the plate member 33 and passing through transversely extending slots in the plate member 34. The plate member 34 (see also Figure 3) is provided with a rearwardly extending lug 34 adapted to overlap laterally the plate member 33 of the bracket 33. An ad usting screw 34 passes through the lug 34 and abuts against the plate member 33. By -means of the adjusting screw 34, the relative displacement laterally of the bracket 34 with its supporting

rollers

35 and 36 may be accurately predetermined relative to the bracket 33. The clamping screws 34 and 34* may, after the adjustment, then lock the parts in adjusted position. Thus it will be seen that the outer end of the work may be accurately displaced laterally with res act to the inner end of the work, in or er that the axis of the inner end (37 for example) may be accurately aligned with respect to the operative portions of the two wheels.

As hereinbefore described, the auxiliary frame member 32 may be vertically adjusted by means of the slot and bolt connection thereof with the movable su porting posts 30 and 30". The auxiliary rame member 32 may be adjusted with respect to these posts so as to bring the axis of the work operated upon in substantially the same horizontal plane with the locus of operation of the grinding wheel 22, when the operating lever 1s swung into the position shown in Figure 2 to carry the work portion 37 downwardly between the two wheels for operation thereon. A air of stops 74 and 74 (see Figure 2) pref drably takm a form of screws threaded into suitable a utments in the upper portion of the frame member 30 and one adjacent each of the movable

iao supporting posts

30 and 30 "may be emregulating wheel 24 holds the work against ployed not only to make the above described the stop member 71 (see Figures 2 and 3) adjustment, but also to limit the downward and that the grinding wheel 22 is being removement of the work when carried into ciprocated as hereinbefore described and operative relation to the two wheels. through the mechanism diagrammatically In this connection it may be noted that shown in Fi ure 9. The stop members 74" the adjusting screw 33 (see Figure 2). may and 2' 1: (see i ure 2) limit the downward be employed to raise or lower the supporting movement of the

work supporting apparollers

35 and 36, thus eter displacement vertically of the exterior work may be allowed to remain in its lowend of the work with respect to the inner ermost position during as many strokes of ermitting a micromratus with the work thereon, whereupon the v 4 end of the work, to insure the desired rethe grinding wheel 22 lengthwise thereof as movement of the work supporting apparatus.

lation for positioning of the end portion of the lparticular character or condition of the the work operated upon with respect to the wor piece may demand. As the end portwo wheels andthe movement of the rind tion 37" is thus being gradually reduced and ing wheel. It will be noted that as this latground to desired tapered form, the rocking ter adjustment is made, the carrier member icarrier member 41 automatically accommo- 41 hereinbefore described and upon which dates itself to the changes in the conformathe inner end 37 of the work is supported tion of the portion 37 of the work, as the automatically aligns itself with respect to two wheels gradually bring this portion of this inner end and thus insures the pro er the work to the desired accurate tapered supporting of the portion of the work eshape. The grinding wheel in addition to tween the wheels that is to be operated upon. contributing to the accuracy of the rinding From the foregoing, it is believed that the operating by reason of its trued s ape inoperation of the apparatus will be readily sures a very high degree of accuracv by understood, but by way of brief rsum it reason of its movement lengthwise o the may be noted that with the wheels driven at work, this movement being referably a rethe respective speeds hereinbefore described ciprocatory movement in which the pauses and with the

su porting rollers

35 and 36 at the end of the stroke may or may not be driven through the belt 68 at a speed comutilized according to the requirements of mensurate with that of the regulating wheel the particular character of surface in order thus to insure effective conu on. Moreover, the wear on the grinding trol of the rotation of the work during the W ieel 22 is maintained more uniform as a action thereon by the grinding wheel 22, he result of this movement and thus highly auxiliary frame 32 is carried upwardl by uniform as well ,as accurate results are atswinging-the operating lever 70 in c ocktained. y \vise direction (see Figure 2), the inclined After the desired grinding action upon

surface

70 and 70 of the operating bar 70 the portion 3'2 of-the work has been allowed being'efl'ective to bring about this upward to take place, the operating lever 70 may be swung in clockwise direction (see Figure The work piece is then placed upon the sup- 2) to carry the work upwardly and between porting mechanisms so that its one, or inner more distant portions of the operative surend, rests upon the rocking carrier member faces of the two wheels, it bein noted that 41 and so that its exterior or other end rests during this movement the work is effectively upon the driven supporting rollers 35 and maintained in contact with the regula ing 36. regulating wheel surface24 to rotate the grinding wheel surface. The work p ece work piece 37, it being noted that the yieldmay thereupon be removed from the supably positioned roller 69 (see Figure 7) coporting apparatus and replaced by another acting with the inclined surface 41 of the work piece to be ground, when t e ope1a-. carrier member 41 (see Figure 8) acts to tions hereinabove described may be repeated. hold the inner end 37 of the work out of In order to accommodate the apparatus contact with the grinding wheel surface 22 to work of different diameters, the carriages and in contact with the regulating wheel 11 and 12 (see Figure 1) may he adjustably surface 24. Thus the desired rotation of positioned toward or away from one another the work is initiated. as by means of the hand wheels 11 and 12 The operating lever swung in counter clockwise direction (see concentrically arranged and operatively con- Figure 2) whereupon the work supporting nected with their respective carriages to apparatus carries the inner end of the work permit a movement thereof and hence of the 37 downwardly as viewed in Figure 2 to two wheels toward or away from one anpresent this inner end to the opposed operaother, according to the character or diameter tive portions of the two wheels, it being of the Work operated upon. understood that the feeding action of the Work operated The latter at once act to coact with the .wheel surface and out of contactwith the 70 is thereupon respectively, these wheels being preferably 1 It will be noted that, as already hereinbefore described, the bracket 33 may be pivotally adjusted about the clamping screw 33 with respect to the auxiliary frame member 32. Thus, for example, should the end portion 37 (see Fi re 2) of the work be of tapered form, t e bracket 33 with the bracket 34 and supporting

rollers

35 and 36 thereon may be swung in clockwise direction, forexample, about the clamping screw 33 to align the supporting surfaces of the

rollers

35 and 36 with the tapered end of the work. This ad'ustment may be made for example where t e wheels are related to one another to rind the straight or cylindrical portion 3 a of the work 37 in which case the tapered end 37 is supported upon the

rollers

35 and 36.

Turning now to Figure 4 of the drawings, there is shown an arbor 75 having at its one end a cylindrical portion 75 adapted to be supported upon t e supporting rollers '35 and 36 and having at its other end a tapered shank 7 5" upon which is adapted to be positioned a work piece 76 illustratively shown in the form of a tapered drill shank, the exterior of which it is desired to reduce to true ta ered form. By thus assembling the shank 6 with respect to the arbor 75, the former may be ground in substantially the same manner as the ta ered end portion 37 b of the work 37 (see igure 2) hereinabove illustratively set forth. With such an arrangement, the advantages achieved in grindin work of elongated form may be effective y attained with work of short lengths, and the parts shown in Figure 4= are merely illustrative of anarrangement for supporting work of short lengths in a manner to achieve the advantages above mentioned. It is therefore to be understood that the term work iece or 'work as hereinbefore or as hereinafter used, is to be interpretedas inclusive of such an arrangement as is illustratively shown in Figure 4 as hereinabove described.

The rockin carrier member 41 will thus be seen to insure the rigid supporting throughout substantially its entire length of that end portion of the work presented to the wheels for action thereon, the other end of the work being reliably supported u n the

rollers

35 and 36. Chattering is t us effectively avoided since the carrier member 41, in automatically accommodating itself to the end ortion of the work, insures the support 01 this end portion uniformly throughout substantially its entire extent. Moreover, it may be pointed out that, as the rinding proceeds, the right hand end of t e work as viewed in Figure 2 tends to be lowered because of the removal of material therefrom by the grinding wheel. As the work 37 thus in effect swings downwardly at its right hand end to an extent proare attained.

portional to the amount of material removed from the end portion, the rocking carrier member 41 again and continuousl accommodates itself to the chan 'ng conditions, and thus maintains consistently an effective support of the one end of the work throughout the range of action of the wheels in the direction of the length of the work. Moreover it will also be noted that, the outer or left hand end as seen in Figure 2 having been ground to true form, is supporte at that end to rotate about its true axis, and this insures, together with the supporting the concentric grinding of one end of the work with respect to the other.

It will thus be seen that there has'been provided in this invention an ap aratus in which the several objects hereinbe ore noted, as well as many others, are achieved and that many thoroughly ractical advantages It wil e seen that the apparatus is of a thoroughly practical nature and hence well adapted to meet the conditions of hard practical use, and that the apparatus is capable of the achievement of highly uniform and accurate results. It will moreover also be seen that the apparatus is characterized by a high legree of flexibility of adjustment and arrangement and that it may be readily adapted to meet the requirements of the specific character of work operated upon.

As man possible embodiments may be made of t e above invention and as many changes might be made in the embodient above set forth, it is to be understood that all matter hereinbefore set forth is to be interpreted as illustrative and not in a limit- 1n sense.

claim as my invention:

1. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for simultaneous rotating and grinding action upon work of round section supported therebetween, means for supporting work of round section in operative relation to said wheels comprising a carri r member positioned between said wheels for supporting one portion of the work and a member positioned exteriorly of said Wheels for supporting another portion of the work, and means for limiting movement of the work in the direction of its length.

2. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for simultaneous rotating and grinding action upon work of round section supported therebetween means for supporting work of round section in operative relation to said wheels comprising a carrier member positioned adjacent said wheels for supporting one portion of the work and a member positioned remote from action of the rocking carrier 41,

said ivvheels for supportin another portion of the work, and means or 'ving one of said wheels a movement lengt wise of said carrier member during its action upon the work. A

3. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for simultaneous rotating and grinding action upon work of round sec-' tion supported therebetween, means-for supporting work of round section in operative relation to said wheels comprising a carrier member positioned adjacent said wheels for supporting one portion of the work and a member positioned remote from said wheels for supporting another portion of the work, and means for reciprocatin one of said wheels with respect to the ot er and in the general direction of the line of contact of said one wheel with the work.

4. In apparatus of the character de scribed, in combination, a pair of abrasive wheels adapted for simultaneous rotating and grinding action upon work of round section supported therebetween, means for supporting work of round section in operative relation to said wheels comprising a carrier member positioned adjacent said wheels for supporting one portion of the work and a rotatable member positioned remote from said wheels for supporting another portion of the work, means tor rotating said'rotatable member, and means for limiting movement of the work in the direction of its length.

5. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for simultaneous rotating and grinding action upon work of round section supported therebetwcen; means for supporting work of round section in operative-relation to said wheels comprising a carrier member positioned adjacent said wheels for supporting one portion of the work and a rotatable member positioned extcriorly of said wheels for supporting another portion of the work, means for giving one of said wheels av movement lengthwise of said carrier member during its action on the work, and means for rotating said rotatable member.

' 6.1m apparatus of the character describ d, in combination, a pair of abrasive wheels adapted for simultaneous rotating and grinding action upon work of round section supported therebetween, means for supportin work of round section in operative relation to said wheels comprising a carrier member positioned between said wheels for supporting one portion of the work and means positioned exteriorly of said wheels for supporting another portion of the work and adapted to substantially determine the axis of rotation of said last mentioned portion of the work, and'hheans for adjusting laterally said exteriorl positioned means with respect to said carrier member; 7. In apparatus ofthe character described, in combination, a pair of abrasive wheels adapted for simultaneous rotatin and grinding action upon work of roun section supported therebetween, means for supporting work of round section in operative relation to said wheels comprising a carrier member positioned between said wheels for supporting oneedportion of the work and means position exteriorly of said wheels for supportin another portion of the work and adapte to substantially determine th axis of rotation of said last mentioned portion of the work, and means for adjusting vertically said exteriorly positioned means with respect to said carrier member.

8. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for a simultaneous rotatin and grinding action u on work of roun section supported there tween and having operative portions of their adjacent oper ative surfaces more distant from one another at one end thereof that at the other end, thereby to grind work to tapered form, a work carrier extending between said wheels for supporting work of round section in operative relation to said operative portions of said Wheels, and means for ad'usting said carrier about an axis substantially transverse to the plane of the angle between the operative portions of said wheels.

9. In apparatus of the character described, in combination, a pair ofi abrasive wheels adapted for a simultaneous rotating and grinding action upon work of round section supported therebetween and having operative portions of their adjacent operative surfaces more distant from one another at one end thereof than at the other end, thereby to grind Work to tapered form, a work carrier extending between said wheels for supporting work of round section in operativc relation to said operative portions of said wheels, means for adjusting said carrier vertically, and means for adjusting said carrier in a substantially horizontal plane about a substantially vertically extending axis.

10. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for a simultaneous rotating and grinding action upon work of round section supported therebetween and having operative portions of their adjacent operative surfaces more distant from one another at one end thereof than at the other end, thereby to. grind work to tapered form, a work carrier extending between said wheels for supporting work of round section in operative relation to said operative portions of said wheels, means mounting said carrier ion Ill)

to permit said carrier to be adjustably swung about a substantially vertically extending axis, and means for locking said carrier in adjusted position with respect to said axis.

11. In apparatus of the character described, in combination, a pair of abrasive wheels having approachin operative surfaces and adapted for simu taneous rotating and grinding action u on work of round section supported there etween, means for supporting work of round section in ope-rative relation to said wheels comprising a carrier member positioned adjacent said wheels for supporting one portion of the work and means positioned remote from said wheels for supportin another portion of the work, means for imiting movement of the work in the direction of its len h, and means for moving said carrier mem r relative to said approaching operative surfaces to carry the portion of the work sup orted thereon to a osition between more istant portions of the operative surfaces of said two wheels.

12. In apparatus of the character described, in combination, a pair of abrasive wheels having a proachin operative surfaces and adapte for simu taneous rotating and grinding action u on work of roun section supported there etween, means for supporting Work of round section in operative relation to said wheels comprising a carrier member positioned between said wheels for supporting one dportion of the work and means positione exteriorly of said wheels for supporting another portion of the work, and means for movin said work supporting means in a direction to carry the portion of the work supported upon said carrier member to EpOSll'JOIl bebetween more distant portions of the approaching operative surfaces of said two wheels.

13. In apparatus of the character described, in combination, a pair of abrasive wheels having approachin operative surfaces and adapted for simu taneous rotating and grinding action upon work of round section supported therebetween, means for supporting work of round section in operative relation to said wheels comprising a carrier member positioned adjacent said wheels for supporting one portion of the work and means positioned remote from said wheels for sup orting another portion of the work, means or ad ustably positioning said work supporting means about a substantially vertica ly extending axis, and means for moving said carrier member in a direction to carry the portion of the work supported thereon to a position between more distant parts of the approaching operative surfaces of said two wheels.

14. In apparatus of the character described, in combination, a pair ofv abrasive wheels adapted for simultaneous rotating and grinding action upon work of round se tion supported therebetwecn, and means for supportin work of round section in operative relation to said wheels comprisingnieans positioned extoriorly of said wheels for supporting one portion of the work and a selfad usting carrier member positioned between. said wheels for supporting another portion of the work in operative relation to said wheels. i

15. In apparatus of the character de-. scribed, in combination, a pair of abrasive wheels adapted for simultaneous rotating and grinding action u on work of round section supported there tween, means positioned remote from said wheels for supporting one portion of the work, and a floating carrier member positioned adjacent the wheels for supporting another ortion of the work in operative relation t icreto and adapted to align itself with res ect to the portion of the work su ported t iereby.

16. In apparatus oi the character described, in combination, a pair of abrasive wheels adapted for simultaneously rotating and grinding action upon work of round section supported therebetween, means positioned remote from said wheels for supporting one portion of the work, and a carrier member positioned adjacent said wheels for supporting another ortion of the work in operative relation t ereto and mounted to swing about a substantially horizontal axis.

17. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for simultaneous rotating and grinding action upon work of round section supported therebetwecn, means for supporting work of round section in operative relation to said wheels having a carrier member extending between said wheels for supporting one portion of the work and means positioned exteriorly of said wheels for supporting another portion of the work, means mounting said sup orting means to permit adjustment thereo toward or away from one of said wheels, and means adapted to permit relative adjustment between said carrier member and said exicriorly positioned means laterally with respect to one another.

18. In apparatus of the character de scribed, in combination, a pair of abrasive wheels adapted for a simultaneous rotating and grinding action u )on work of round section supported there etween and having operative portions of their adjacent operative surfaces more distant from one another at one end thereof than at the other end, thereby to grind work to tapered form, means for supporting work of round section in operative relation to said wheels comprising spaced supporting members, one of which is positioned between said wheels for supporting another portion of the work, and

means for ad'usting said supporting means about an axis substantially transverse to the lane of the an le between the operative portions of said w eels.

19.- In apparatus of the character described, in combination, a pair'of abrasive wheels adapted for a simultaneous rotatin and grinding action u on work of roun section supported there etween and having operative portions of their adjacent operatwo surfaces more distant from-one another at one end thereof than at the other end, thereby to grind work to tapered. form,

means for sup orting work of round section in operative re ation to said wheels comprising spaced supporting members, one of which is positioned adjacent said wheels for supporting one portion of the work in o rative relat1on thereto and-the other of w ich is positioned remote from said wheels for supporting another portion of the work, means for ad'usting said supporting means about an axissubstantially transverse to .the plane of the angle between the operative ortions of said wheels, and means for adusti'n one of said spaced carrier members laterally with respect tothe other.

20. In apparatus of the character described, in combination, a pair'of abrasive wheels adapted for simultaneous rotating and grinding action upon work of round section supported therebetween and having operative portions of their adjacent operative surfaces more distant from one another at one end thereof than at the other end, thereby to grind work to tapered term, means for supporting work of round section in operative relation to said wheels comprising spaced supporting members, one of which is positioned adjacent said wheels for supporting one portion of the work in o rativc relation thereto and the other of w 'ch is positioncd remote from said wheels for supporting another portion of the work, means for adjusting said supporting means about an axis substantially transverse to the plane of the angle between the operative portions of said wheels, and means for adjusting one of said spaced carrier members vertically with respect to the other.

21. In apparatus of the character .described, in combination, a carrier for supporting thereon work of round section, a regulating wheel positioned on one side of said carrier and adapted to be rotated at a relatively low speed, thereby to control the rotation of said work on said carrier, a grinding wheel positioned on the other side of said carrier and adapted to be rotated at a relatively high speed, and additional means for rotating the work on said carrier.

22. In apparatus of the character described, in combination, a carrier for sup porting thereon work of round section, a regulating wheel positioned on one side of said carrier and adapted to be rotated at a relat vely low 8 eed, thereby to control the rotation of sai work on said carrier, :1 grmding wheel positioned on the other side of sa1d, carrier and ada ted to be rotated at a relatively high spee and means acting independently of said carrier for holding the work in contact with said regulating wheel.

23. In apparatus of the character described, in combination, a carrier for supporting thereon work of round section, a

regulating wheel positioned on one side of I said carrier and adapted to be rotated at a relatively low s ed, thereby to control the rotation of sai work on said carrier, a grinding wheel positioned on the other side of said carrier and adapted to be rotated at a relatively high speed, additional means for rotating said work on said carrier, and means for giving said grinding wheel a movement lengthwise of said carrier.

24. In apparatus of the character described, in combination, a grinding wheel adapted to be rotated at a relatively high speed, a regulatin wheel adapted to be rotated at a relative y low speed, said wheels being adapted to present adjacent operative surfaces traveling in opposite directions, a pair of spaced carrier members, one of which is positioned adjacent said wheels for su porting one portion of the, work in operatlve relation to said wheels and the other of which is positioned remote from said wheels for supporting another portion of the work, and means positioned intermediate of said two spaced carrier members for holding the work supported thereon in contact with said regulating wheel.

25. In apparatus of the character scribed, in combination, a grinding wheel adapted to be rotated at a relatively high speed, a regulating wheel adapted to he rotated at a relatively low speed, said wheels being adapted to present adjacent operative surfaces traveling in opposite directions, a pair of spaced carrier members, one of which is positioned adjacent said wheels for supporting one portion of the work in operative relation to said wheels and the other of which is positioned remote from said wheels for supporting another portion of the work, and a roller member yieldingly urged against the work on the side thereof remote from said regulating'wheel.

26. In apparatus of the character described, in combination, a grinding wheel adapted to be rotated at a relatively high speed, a regulating wheel ada ted to be retated at a relatively .low spec said wheels. being adapted to present adjacent approachltd till

ing operative surfaces traveling in opposite directions, means for supporting work of iound section in operative relation to said wheels, means for moving said supporting means in a direction to carry the work into or out of operative relation to said wheils, and a roller member contacting with the work and adapted to urge the latter away from the grinding wheel surface during movement of said supporting means.

27. In apparatus of the character described, in combination, a grinding wheel adapted to be rotated at a relatively high speed, a regulating wheel ada tedto be retated at a relatively low t-(peer said wheels being adapted to present a jacent approaching operative surfaces traveling in opposite directions, means for supporting work of round section in operative relation to said wheels, means for moving said supporting means in a direction to carry the Work into or out of operative relation to said wheels, and a roller member mounted upon said supporting means to be movable therewith and yieldingly urging the work thereon toward said regulating wheel.

28. In apparatus of the character de scribed, in combination, a pair of abrasive wheels adapted for a simultaneous rotating and grinding action upon work of round sections supported therebetween and having operative portions of their adjacent operative surfaces more distant from one another at one end thereof than at the other end, thereby to grind work to tapered form, an elongated frame member extended between the operative surfaces of said two wheels, means mounted adjacent the end of said frame member remote from said wheels for rotatably supporting one end of the work, a carrier member adjacent said wheels for supporting another portion of the work, and means mounting said carrier member upon said frame member adapted to permit said carrier member to align itself with respect to the portion of the work supported thereon.

29. in apparatus of the character described, in combination, a pair of abrasive wheels adapted for a simultaneous rotating and grinding action upon work of round section supported therebetween and having operative portions of their adjacent operative surfaces more dist ant from one another at one end thereof than at the other end, thereby to grind work to tapered form, an elongated frame member extended between the operative surfaces of said two wheels, carrier means mounted upon said frame member for su iportilw one end of the work, a carrier member rockingly mounted upon said frame member and adjacent said two wheels for supporting another portion of the work and means for angularly adjusting said frame member in a plane substantially parallel to the plane of the angle between said opposed operative portions of said two whee 30. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for a simultaneous rotating and grinding action upon work of round sectionsupported therebetween and having operatlve portions of their adjacent operative surfaces more distant from one another at one end thereof than at the other end, thereby to grind work to tapered form, an elongated frame member extended bctween the operative surfaces of said two wheels, carrier means mounted upon said frame member for supporting one end of the work, a carriermember rocking] mounted upon said frame member and ad acent said two wheels for supporting another portion of the work, means for angularly adjustin said frame member in a plane substantiall parallel to the angle between the oppose operated portions of said two wheels, and means for adjusting laterally one of said carrier members with respect to said frame member.

31. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for a simultaneous rotatin and grinding action upon work of round section supported therebetween and having operative portions of their adjacent operative surfaces more distant from one another at one end thereof than at the other end, thereby to grind work to tapered form, an elongated frame member extended between the operative surfaces of said two wheels, carrier means mounted upon said frame member for supportin one end of the work, a carrier member roc ingl mounted upon said frame member and adjacent said 'two wheels for supporting another portion of the work, means for angularly adjusting said frame member in a plane substantially parallel to the angle between the opposed operated portions of said two wheels, and means for adjusting one of said carrier parts vertically with respect to the other.

32. In apparatus of the character described, in combination, a pair of abrasive wheels adapted for a simultaneousrotating and grinding action upon work of round section supported therebetween and having operative portions of their adjacent operative surfaces more distant from one another at one end thereof than at the other end, thereby to grind work to tapered form, a work carrier extending adjacent said wheels for supporting work of round section in operative relation to said operative portions of said wheels, means for adjusting said carrier about an axis substantially transverse to the plane of the angle between the operative portions of said wheels, and means for giving one of said wheels a movement lengthwise of sad carrier.

1,i'soo,19o V 15 33. In apparatus of the character desaid vwheels and means positioned remote scribed, in combination, a pair of abrasive from said wheels for holding another porwheels adapted for simultaneous rotating tion of the work, one of said means being and grinding action upon work of round arranged to be substantially se1falining 6 section supported therebetween, and an arrelative to the portion of the work engaged 15 rangement for holding work of roundsec-' thereby. tion in operative relation to said wheels, In testimony whereof, I have signed my said arrangement including means posiname to this specification this first day tioned adjacent said wheels for holding one of October, 1923.

10 portion of the work in operative relation to LEWIS R. HEIM.