US2109524A - Grinding machine - Google Patents

Description

March l, 1938.

R. H, CRAMER GRINDING MACHINE Filed Jan. l1, 1935 5 Sheets-Shea?l l [NMEA/TOR' RaW/OND mgfmM/sm H/s wrok/w:

March 1, 1938.

. H. CRAMER GRINDING MACHINE Filed Jan. ll, 1955 5 Sheets-Sheet 2 /E 122 /24 /60 /62 /22 /EO v I/wE/vToR.'

RHYMo/VD H. MER,

#asm-m March l, 1938. R H, @5mn/EF@l 2,109,524 I GRINDING MACHINE Filed Jan. ll, 1955 5 Sheets-Sheet 3 JN VEA/TOR.' fm ND fi/WER,

HIS HTTOR'NEX March l, 1938. R. H; CRAMER GRINDING MACHINE 5 Sheets-Sheet 4 Filed Jan.' ll, 1955 I/wE/vro Rav/HOND qgrHMsR, 5%

GRINDING MACHINE Filed Jan. ll, 1935 5 Sheets-Sheet 5 Rm" o/vo MER, 1%#

- Patented Mar. 1, 1938 UNITED STATE GRINDING MACHINE Raymond H. Cramer,

General Motors Corporation,

Newark, N. J., assignor to Detroit, Mich., a

corporation of Delaware Application January 11, 1935, Serial No. 1,414

43 Claims.

This 'invention relates to grinding machines and comprises all of thek features of novelty here,

ject is to provide improved loading and unloadin'g mechanism for machines of this general character, such that there is little time lost in exchanging workpieces and the operation ple, direct and positive with easy setup or adjustment when sizes change. Still another object is to provide an improved idler wheel mounting. Yet another object is to improve the mechanism for controlling the pressure idler, ejector. and

gauge.

To these ends and also to improve generally upon machines of this character, the invention consists in the vvarious matters hereinafter described and claimed. In its broader aspects, the invention is not necessarily limited tothe speciiic construction selected for illustrative purposes in the accompanying drawings in which- Fig. 1 is a plan view of the machine with some parts broken away and in section, the pressure idler, ejector and magazine being removed.

Fig. 2 is an isometric view of a cam plate.

Fig. 3 is a plan view of a lever.

Fig.4 is an end view of the machine with the reciprocating table and a portion of the main frame in vertical section.

Fig. 5 is a sectional view on the line 5 of Fig. 4. Fig. 6 is a side view of a gauge bracket.

Fig. 7 is a iront view of a portion of the machine, the pressure idler being broken o.

Fig. 8 is an end view with parts broken away and in section.

Fig. 9 is a vertical sectional view of a portion of the gauge rod and associated parts.

Fig. l0 is a front view of a portion ofthe gauge mechanism, some of the associatedl parts being broken away and in section. f

Fig. 11 is an end view of a modication.

Fig. 12 is a view like Fig.' 11 but with certain parts in another position. n Fig. -13 is a plan view of a ller plate.,` Figs. 14 to 1'? inclusiveare diagrammatic end views illustrating the workieedlng and ejecting mechanism in different positions. 18 lis, a side View of abracket and Fig-19 is a sectional view of the magazine outlet. ,Y

Stated generally, the machine comprises a work head having a sexies of wheels or lrollers :which being simy peripherally engage a hollow work-,piece and con.

trol its rotation while a high speed grinding wheel engages the inner wall of the work-piece to grind the bore. The work-head reciprocates under control of any suitable hydraulic drive, as in the. Well known Heald internall grinder, while the grinding wheel is fed radially of the work. Gauge plugs repeatedly engage the end of the work and successively enter its bore as the piece is ground to corresponding dimensions, such entry of the gauge plugs controlling successive amplified `movements of the work head, as for wheel dressing and unloading the work. The work is fed 'from a magazine, feeding and ejecting being automatically controlled by the movements of the work head. I A main frame 2 (Fig. 4) is provided with ways 4 and 6 for a reciprocating table or slide 8 which contains a drain opening l0 for cooling medium. A supporting filler plate I2 is secured to the top of the table or slide 8 by a pivot stud I4 and T- headed clamping bolts I6. The pivot stud allows angular adjustment of the filler plate in order that all of the supported parts can be lined up with the table ways or, if desired, it can be angled with respect to the table, as when tapered work is being'ground. To allow this angular adjustment, the table is provided with undercut slots i8 which are curved about a center at the pivot (see Fig. 13) vThe ller plate I2 has a slot 20 to receive a cam, a shallow round recess 22 for a locating plug, and ahollow lug 24 to support a guide rod, all as will later appear in detail.

The filler plate I2 has arear extension or pad 26 supporting a bracket 28 carrying an electric motor 30, the motor having its feet provided with T-headed clamping bolts 32 to secure the motor in adjusted position." The motor has a driving pulley 34 (Fig. 1) connected by V-type belts 36 to a pu1ley`38 on ya shaft 40 which is rotatably journalled in a head casting 42.v The head casting has feet 44 secured by'bolts 46 to a base plate 48,

screws adjustable inlugs of the base plate abutting against the feet 44 for locating the head -casting inv adjusting position. The base plate is located onvthe filler plate I2 by a circular locating plug-52 (Figs.

mentioned rece'ss'22 ofthe -i'lller plate.

'I'hat end'of the shaft 40 which is lopposite to the'pulley 38 overhangs the vhead and supports fa'regulatirlg Awheel 54 (Fig." 4)which is clamped `to the shaft by la washerI 56 and a nut 58.

` 60 is detachably' secured tothe regulating wheel by screws entering bayonet slots- 62 in the ring. j 4`Tl'ieflingis alittle' larger in diameter-than the Wheelftoprovideaprojecting flange 64 which `A Ting 8 and 10) which enters the beforework-piece W and prevents the Work from movy ingendwise in one direction. The ange is thus made removable so that the regulating wheel 64 can be faced off or true'd by reciprocating it axially along the grinding wheel G.

The work W- isv rotatably supported by a supporting idler wheel 66 which is adjustable along an incline in order 'to support work of all di'- ameters at the same level, and preferably theV axis of the work is in a common plane with the axis of the grinding wheel and the axis of the regulating wheel. The wheel 66 is hollow and contains two separated pairs of ball bearings 68 Fig. 1) whose outer race rings are retained by ring nut 10. The inner race rings of these bearings are spaced apart in pairs by a sleeve 12 surrounding a supporting shaft 14. Such inner race rings and sleeve are clamped as -a unit against-a shoulder of the shaft by'a nut 16'. One end of the shaft 141s secured by a screw 18 in an open seat of a standard 80 carried by a slide 82. Another standard 84 has a\similar open seat (Fig. 4) in which a segmental extension of the shaft is fastened by a. screw 86. This end of the shaft receives a grease fitting 88 communicating with suitable ports to conduct lubricant to the bearings.

One end of thef slide 82 has a slotted extension 90 (Fig. 7) for a clamping bolt 82 and the other end of the slidehas a bevelled face 94 engaged by a bevelled lip on ya. clamping plate 86 which is secured by a screw 88 to the base plate 48. The base plateis inclined and has a guide slot receiving a tongue |02 on the slide. tongue is tapped to receive an adjusting screw |04 which is journalled for rotation without endwise movement in a plate |06 fastened at the front of the base plate. A hand wheel |08 provides i'or turning the screw to adjust the slide and the supporting idler 66 to the correct posi- .tion for supporting work of the selected size with the centerl at a predetermined level. Tangent to the idler 66 and inclined downwardly therefrom, is a discharge chute ||0 (Fig. 4) supported on a bent bracket ||2 which in turn *is supported by -a bracket ||4 on the base plate.

The remaining work-engaging wheel or roller ls a pressure idler wheel |20 (Figs. 4 and 5) urged by spring pressure'against the work and automatically raised when the work is ejected from grinding position. 'Ihe wheel is hollow and contains a pair of ball bearings |22 whose outer race rings are spaced apart by a sleeve |24 while ring nuts |26 clamp the race rings in the wheel. The inner race rings are spaced by a sleeve |28 having flanges |30 with oil passages.' The inner race rings and the sleeve |28 are clamped as a unit against a shouldered sleeve |82 by a nut |33. The sleeve |02 is carried by a shouldered supporting shaft |24 having a ball-segment |88 at one end. 'I'he segment has universal adjustment in a similarly shaped seat in an arm |38, a portion of the seat being formed on a detachable nut |40 threaded in the arm. The arm |88 is connected by a web or guard |42 to a companiqn arm |44 and the connected armsare mounted for rocking'movement on an axis above the regulating wheel, as will appear. The arm |44 has an opening receiving a thimble |46 which is secured to the shaft |84 by a screw |40. 'I'he thimble is externally four-sided or provided with ilats engaged by two pairs of opposed set screws |60 threaded in the arm |44. By loosening one screw and tightening the opposite one. the shaft The |34..and hence the idler wheel |20, can be skewed with respect to the work thereby producing a tendency to urge the workA endwise and hold it against an abutment. 'I'hus the work can be held from endwise movement on its supports when the work and the grinding wheel have a relative ax/ial reciprocation.

To lubricate the idler wheel |20, a grease iitting |52 leads to a central passage |54 communicating by a radial port |56 with a peripherally'extending groove |58 on the exterior of the shaft |34.l

'I'he groove |58 communicates by a radial port in thesleeve |32 with va peripheral groove |60 1n the'l'nterior of the sleeve |28, and a. radial port; |62 leads from the groove |60 to the space betweenthe flanges 30. Lubricant forced into this -spac'e has access through the before-mentioned ports in the flanges |30 to the bearings. The lubricant is retained in the wheel by suitable packings |64 in the ring nuts |26 and by overlapping anges on these nuts and the nuts |33.

'I'he arms ,|88 and |44 have their upper ends or-hubs split (Figs. 1 and 7) and clamped by screws |10 to a rock shaft |12.which is journalled in lugs |14 projecting forwardly-from a bracket |16, the lugs |14 being fastened by screws |18 to upwardly extending lugs on the head casting 42. 'Ihe bracket |16 has an extended-portion |80 between the arms |38 and |44 and, at the rear, a pipe |82 leads to -a chamber |84 in the extension. Wateradmitted from the pipe to the chamber is sprayed down through a slit |86 ontothe regulating wheel and keeps its surface and that of th' work clean and cool. The chamber is closed at the end by a threaded plug |88. A third arm |90 is vclamped by` a screw |92 to the overhanging end of the rock shaft |12, one side of the arm being longitudinally grooved to receive an extension arm |84 which is adjustably secured in the groove by screws` |86. The extension arm terminates in a laterally 'directed work ejector |88 of substantially triangular cross section. I'he ejector has a notch to make it clear the regulating wheel flange 64 and so lies close along the regulating wheel just out of contact with the work. When the shaft |12 is rocked clockwise in Fig. 4, the pressure idler wheel |20 and the ejector are simultaneously raised, the ejector lifting the released work over the supporting idler 66 to the exit chute ||0. The ejector then operates as a work loader as will appear. The work is automatically fed to the machine from a magazine (see Figs. 4 and '7). On the at top of the extension |80 of the bracket |16 is fastened an angle bracket having -a horizontal leg 202 and an upright leg 204. 'I'he latter has L-shaped notches 206 at its upper edge to detachably and adjustably receive clamping studs 200 which are riveted to a magazine side wall 2|0. This side wall has an inclined fin 2|2 projecting from 'it laterally, and work pieces placed on the 11n roll down it towards a rear fin 2|4. The rear iln is joined to a bottom iin 2| 6 which inclines downwardly to meet a vertical iin 2|8. The iln 2|8 terminates in a lip 220 which tlts close up to the regulating wheel 54. The magazine side wall 2|! also has a vertical iront iin 222 who upper end is inclined backwardly at 224. The iins are preferably welded to the side wall and slots`226 in the side wall provide for inspection oi the work-pieces as the latter roll of supporting studs 228 which are riveted to it and project laterally to slidably receive supporting sleeves 230 on a companion side wall 232 which is parallel to the side wall 2 I0. Set screws 234 provide means to secure the side wall 232 at the desired distance from the side wall 2|0 to suit the length of the work. The side wall`232 .has an inclined slot 236 to clear the inclined fin 2|2 and has a triangular notch 238 at the front to receive the inclined end 224 of the vertical n 222. Elsewhere the side-wall 232 fits within the fins of the side wall 2I0. and 19) is secured to the lower portion of the side wall 232 and carries a sleeve portion 242 which is slidably adjustable on a stud 244 which is riveted to a little bracket 246 fastened to the rear of the vertical fin 2|8, thus giving the side Wall 232 a third point of support. A bolted-on extension side wall 248 projects downwardly from the side wall 232 and terminates in a curved edge 250 which is arranged to slightly overlap the corresponding end of the work and act as an abutment therefor. This extension takes the thrust induced on the work by the skewed idler |20 and preferably has hardened inserts 25| (Fig. 17)` to take the wear. The side wall 2|0 also has a separate bolted-on extension 252 but this preferably does not loverlap the work as the wheel flange 64 is in the same plane and prevents axial movement of the work. An escapement or baffle plate 254 (Fig. 4) projects between the bolted-on extensions 248 and 252, and is attached by a screw 256 to a portion of the guard |42. This escapement or baffle plate co-operates with the magazine lip'220 to retain the articles in the magazine and it is lifted with the pressure idler |20 to release or drop a new piece onto the ejector |88 which then lowers the piece to grinding position as indicated in Figs. 14 to 1'1.

For actuating the rock shaft |12, a lever 268 (Fig. 8) has .its hub 262 keyed to one end of the shaft, the. longer arm of the lever having a concave seat for arcuate side ribs 264 on a. washer 268 which rests on a coiled expansion spring 268. The spring bears against a flange210 on a hollow enlargement 212 of an adjusting rod 214 having a hand wheel 216. A rod 218 is threaded in the enlargement 212 and has its lower end anchored by a screw 280, to the ller plate I2. The coil spring urges the rock shaft |12 clockwise in Fig. 8 and its tension can be adjusted by turning the hand wheel. The short arm of the lever 260 has a recessed seat 282 for a ballended rod 2 84 whose lower end is seated in a recess of a plunger 286 which is slidable vertically in a bushing 288 carried by the base plate 48. The downward movement ofthe plunger is limited by a ange 290 and the plunger is held from turning by a key pin 292 enteringa slot in the bushing 288.

The lower end of the plunger carries a cam roll 294 running on the upper surface of a cam plate 296 contained in the previously mentioned notch 20 in the filler plate I2. The cam plate is anchored against shifting movement aswill appear while all the adjacent parts reciprocate with the table or slide. The cam plate is accordingly supported on several rows of balls held in openings of a separator plate 298 and running on a fiat race plate 300, all these parts being contained in the slot 20. The cam plate has a cam incline 302 (Fig. 2) which co-operates with the cam roller 294 to reciprocate the plunger 286.

A notch is formed in one side of the incline and 75 one end of it is provided with a secondcam 304 A plate 240 (Figs. 7

for operating a gauge rod as will appear. To anchor the cam, a tie rod 306 (Fig. 1) is threaded in one end of the cam plate and locked by a nut 308. The other end of the tie rod is threaded in one end of an anchor screw 3I0 and locked thereto by a nut. The anchor screw is adjustably secured in 'a bracket 3|2 on the main frame by nuts 3|4. This anchors the cam plate from movement although, by tunilng the nuts 3|4, the cam plate can be adjusted endwise in order that the. cam inclines 302 and 304 will-come *into action at the proper time in the reciprocation of the work head. l

During grinding, the work-piece W is gauged upon every reciprocation of the work head. There are two gauge plugs 320 (Fig. 1) differing slightly in diameter with the smaller in advance.

As the work approaches size, the smaller plug enters the work and controls an amplified reciprocation of the work head so that the grinding wheel can be dressed by any suitable mechanism. As grinding is resumed andthe work reaches size, the second gauge plug enters and controls a final retreating movement of the work head during which the work is ejected. These amplified movements are effected by suitable trip mechanism acting on a reversing mechanism and are well known in the art. The gaugediscs 320 are secured to the end of a shiftable gauge rod 322 which is hollow to provide a passage 324 for liquid cooling medium. The gauge rod is mounted for rotation and for reciprocation in a pair of roller bearings 326 carried in recesses at the opposite ends of a supporting sleeve 328. The bearing nearest the grinding wheel is provided with a suitable packing held in a threaded cap 329. The sleeve is clamped in an opening of a cross slide 330 by a handscrew 33|, the slide being adjustable from front to rear on ways 332 under control of a screw 334 which is mounted for rotation without endwise movement in a plate 336. This adjustment is to keep the gauge plugs 320 concentric with the work, vit being understood that work-pieces of all sizes are supported at the same level but that larger pieces have their centers farther to the front.

The gauge rod 322 has one end passed through a horizontal -slot 338 in an upright bracket -340 (Figs. l, 9, l and 18) having ball thrust-bearings 342 at each side, one such bearing engaging a shoulder bearing being h eld on the gauge rod b nuts 346. The bearings provide for rotation of the gauge rod, and the horizontal slot permits the beforementioned horizontal adjustment of the gauge rod by the cross slide 330. The end ofthe hollow gauge rod is flared to form a conical seat for a conical surface on a hollow head 348- to which cooling medium is supplied by a flexible pipe 350. A leaf spring 35| attached to the bracket 340 holds the conical surfaces seated. The lower` portion of the bracket 340 has an enlarged sleeve portion 352 adjustably secured to the threaded end of a control rod 354 by nuts 356, this adjustment depending on the length of the workpieces. The control rod is slidably mounted in bushings 358 and 360 secured in horizontal openings in the filler plate |2. The opening nearest the grinding wheel is sealed-up by packings 362 held by a cover plate 364. The corresponding end of the control rod 354 is arranged in line with an abutment screw 365 adjustably carried by any convenient stationary portion of the grinding wheel support. This abutment will prevent the gauge plugs 320 from coming in contact 75 344 `of thegauge rod and the other with the grinding wheel as when the work and the gauges iinish their strokes towards the grinding wheel. When the work head is retracted to inoperative position, the gauge plugs are moved away from the work, as will appear, but whenever the` work head advances to grinding position, the gauge plugs are urged against the end of the work by spring pressure.

An arm 366 projects forwardly from the bracket 340 and is provided with a guide sleeve 368 slidably supported on a. guide rod 318 which is xed by a set screw in the beforementioned lug 24 of the ller plate I2. A lug 314 projecting downwardly from the guide sleeve 368 adjustably supports a threaded rod 316 connected to a. coil spring 318 which is anchored at 388 to the reciprocating table or slide 8. A sleeve 382 (Fig.

6) is pinned to the control rod 354 and has a forwardlyprojecting bracket or arm 384 which isslidably guided by the guide rod 310. 'I'he arm 384 has a. depending portion 386 in which a pair of knock-of! screws 388 are adjustably secured These screws are arranged to strike successively against dogs 392 (Fig. 4) projecting from a housing 394. 'Ihe dogs mechanically control the reversing mechanism o1' the reciprocating table, the rst dog being actuated when the smaller gauge plug enters the work and the second being actuated when the larger gauge 4plug enters. To control the movement of the gauge plugs into yielding contact with the work by means of the coil spring 318, a. split collar 396 is clamped to the control rod 354 and has an upwardly projecting roller stud 398 bearing against a cam-operated lever 480. The lever has an upwardly projecting vpivot stud 482 and a short arm carrying a cam roller 404 which runs along the vertical side of the cam plate 296 `to and from the side cam 384. The lever is contained in a recess 486 of a holding plate 488 which is partially contained in a recess 4|8 of the base plate 48.

While the cam roller 404 is in contact with the vertical side of the cam plate 286, the gauge plugs areheld back a. little' way from the work but when the workhead advances far enough for the cam roller to pass the side cam 304, the smaller plug will yieldingly engage the end of the work piece to test the size of the bore. The plugs will be frictionally rotated by Contact withthe work. As the gauge'plugs continue to advance (while yieldingly held against the advancing work) and approach closely to the grinding wheel, the control rod 3514 will strike the adjustable abutment screw 365 and arrest the gauge parts from further` advance although the work and lits supports will continue the stroke until the remaining surface of the work has traversed over the grinding Wheel. As the reciprocating table then reversesythe control rod 354 leaves the abutment screw 365 and the work catches up to and again engages the gauge. plugs. When the work is ground down so that the first gauge plug enters the work, ene of the clogs 392 -is actuated to cause an amplified withdrawal stroke of the table so that the grinding wheel can be dressed. When the second completed work, the other dog 392 is actuated and the table makes a final` retreat. In this retreat, the gauge plugs are retracted under control of the 'side cam 384, and the pressure idler |20 is lifted under control of the cam 302. The ejector |98 is of course lifted also and the finished piece. thereby pushed over the supportingidler 66 to the exit chute H8. Meanwhile the gallge plug enters the piece down to grinding position while the pressure idler comes down and engages the piece. Then the gauges advance and yieldingly engage the work asbefore. The preferred directions of rotation of the wheels are indicated by the arrows in Fig. 14.

Figs. l1 and 12 illustrate a modiiication of the feeding and ejecting mechanism. A swinging arm 420 is pivoted on the shaft ,14`and carries an arcuate plate 422 which just clears the regulating wheel 54. One end of the plate forms an ejector 424 for lifting the piece over the idler 66, the arcuate plate thereafter catching the next piece released from the magazine and the ejector subsequently letting the piece down to Y grinding position.- To actuate the arm 420, a link 426 is pivotally connected to it and to an extension.428 of the arm |44. The extension has a slot 438 for an adjustable pivot 432 so that the throw of the link and ejector can be' adjusted.

With this construction, the ejector is carried by the idlerwheel 66 and does not need adjustment with respect to the latter when the slide 82 is moved along its incline.

In both forms, the magazine outlet lies adjacent to the work receiving space and between the pressure idler |28 andthe regulating wheel 54 While the ejector normally lies between the supporting idler 66 and the regulating wheel. With a short throw of the ejector to a location directly over the low supporting idler, or between such idler and the magazine, the iinished Work is pushed through the discharge space to the -incllned chute. Meanwhile the baille plate 254 has released the next following work-piece which drops onto the ejector and regulating wheel.

This piece is lowered by the ejector to grinding position, the ba'ie plate and pressure idler returning to normal position with the ejector, and the baille plate arresting the remaining workpieces. The ejecting and loading is accomplished v simply, directly and quickly by a simultaneous vand short movement of ejector, baille plate and pressure idler, all operated from a single rock shaft. i

Assuming a work-piece is in grinding position, the work-head reciprocates to traverse the work across the grinding wheel. On each stroke of the right in Fig. 1, the cam roller 484 reaches the cam 384 and releases the lever 480, the lever releasing the control rod 354. The coil spring 318 urges the smallergauge plug 328 against the end of the work to test its diameter. The plug cannot reach the grinding Wheel because the control rod 354 will previously be arrested by contact with the abutment screw 365. `When the smaller gauge plug entersOthe work, the control rod andthe knock-off screws are permitted a little extra movement to theright, sufficient for one of them to operate one of the dogs 392. v'Ihis results in anamplied withdrawal movement of the work head to the left during .which interval the grinding wheel may be dressed and the crossfeed reduced according to the common practice. Grinding is resumed and continued until the second gauge plug enters the work. This gives the other knock-off screw 388 a little further advance to actuate its co-operating dog 392. This controls the final remote retreat of the work head to the left. :The cam roller 484 leaves the cam 384 and rides along the side of the anchored paragraph to eject the finished work and intro- Vduce a new work-piece.

I claim: d

1. In a machine -of the character described, a pair of work supporting members at different levels for engaging a round work-piece at angularly .spaced locations, a pressure member opposed to the supporting members for holding the work against them, means for moving the prssure member to provide a work discharge space .between it and the lower one of the supporting members, and means for pushing the work radially into the discharge space to discharge it over the lowersupporting member and laterally thereof substantially as described.

2. In a machine of the character described, a pair of work supporting members at diierent levels for engaging a round Work-piece at angularly spaced locations, a pressure member opposed to the supoprting members for holding the work against them, meansv for moving the pressure lmember to provide,v a work discharge space between it and the lower one of the supporting members, an ejector between the work supporting' members, and means for moving the ejector to a point above said lower supporting member to roll the work over the latter; substantially as described.

3. In a machine of the character described, kKa. pair of `work supporting members for engaging a round work-piece at angularly spaced locations, a pressure member opposed to the supporting members for holding the work against them, an arm carrying the pressure member, means for moving the aim to provide a work discharge space between the pressure member and one of the supporting members, an Vejector for raising the work radially over one of the supporting members into said discharge space, an arm connected to the ejector, and a common actuating means or moving the arms of the pressure member and t e ejector in the same direction to cause the ejector to push the work-piece into said discharge vspace as said space increases; substantially as described. 4. In a machine of the character described, a pair ci work supporting members for engaging a round work-piece at angularly spaced locations, a pressure member opposed to the supporting members for holding the work against them, means for moving the pressure memberto provide a work discharge space between it and one of the supporting members, an ejector between the pair of supporting members, means for moving the ejector out from between the supporting members to push the work-piece between the pressure member and said one supporting member, and a magazine having an outlet portion to introduce a workpiece between the pressure member and the other supporting member; substantially as described.

5. In a machine of the character described, a pair of work supportingmembers for .engaging a round work-piece at angularly spaced locations, a pressure member opposed to the supporting members for holding the work against them, means for moving the pressure member toprovide a workdischargespace between it and one of the supporting members, a 'magazine having an outlet portion between thev pressuremember and the other supporting member, and means for ejecting a work-piece radially through s'aid space; substantially as described.

6. In a machine of thefcharacter described, a pair of work supporting members for engaging a round work-piece at angularly spaced locations, apressure 'member opposed to the supporting members for holding the work against them, a magazine having an outlet portion between the pressure member and one of the .supporting members, a mounting for shifting the presure member away from both of the supporting members to tween the pressure member and one of the supl porting members, and means for shifting the pressure member and the ejector in afdirection away from both the supporting members to introduce a new work-piece between the pressure member and said one supporting member and to eject a work-piece radially between the pressure member and the other supporting member; substantially as described.

8. In a machine-of the character described, a pair of work supporting members, a pressure member oppsed to the supportingmembers, an ejector between the supporting members, a magazine having an outlet portion between the pressure member and one of the supporting members, and means for shifting the ejector to a location between the other supporting member and the magazine outlet to eject a work-piece transversely f over said other supporting member and receive another work-piece on the ejector and said one supporting member from said outlet; substantially as described.

9. In a machine oi' the character described, a

pair of work supporting members, a pressure member opposed to the supporting members, an

ejector between the supporting members, a. magazine having an outlet portion between the pressure member and one ofthe supporting members, means for shifting the ejector to a location between the other supporting member and the magazine outlet to eject a. work-piece over said larly spaced locations, an ejector between the supporting members, a magazine having an outlet portion adjacentto the work-receiving space, means for reciprocating the .ejector to and from va point in the work-receiving space to eject a work-piece over the lower one of the supporting members and to lower another work-piece onto the supporting members, and a baille plate for retaining work-pieces in 'the'magazine outlet and movable to release said other work-piece onto the ejector; substantially as described.'

11. In a machine of 'the' character described.

,a pair of workl supporting members at different levels for engaging a round work-piece at angug levels for engaging a round work-piece at anguvlarly spaced locations; an ejector between lthe supporting members and arranged to engage the periphery of the work-piece, a magazine having an outlet portion adjacent to the work-receiving space, a baille plate shiftable with respect to the outlet, an inclined exit chute substantially tan-g.

' gent to the lower supporting member, means for shifting the ejector into and out of a position directly over the lower one o f the supporting members to` discharge the work onto said exit chute,

and means for causing the baille plate to shift simultaneously with'the ejector;` substantially as described.

13. In a machine of the character described, a pair of work supporting members at different levels for engaging a round work-piece at angularly spaced locations, an exit chute -inclined downwardly away from the lower one of the supportingk members and substantially tangent to its upper surface, a work ejector between the work supporting members and mounted to shift therefrom to a position over the lower supporting member, and means for actuating the ejector substantially radially against the outer periphery of the work-piece to roll the: work-piece transversely over said lower supporting member to the exit chute: substantially as described.

14. In a machine of the character described, -a pair ofwork supporting members one of which is a regulating wheel, a magazine having an outlet portion adjacent to the regulating wheel, one of the side walls of the magazine overlapping one 4end of a work-piece carried on the supporting members, and means for urging the work-'piece against said side wall; substantially as described. 15. In a machine of lthe character described, a

pair of work supporting members one of which' is a regulating wheel, a magazine having an outlet portion adjacent to the regulating wheel, the wheel having a projecting ange overlapping one end of a work-piece, and the magazine having a side wall overlapping the other end of the workpiece; substantially as described.

16. In a machine of the character described, a. pair of worlgupporting members one of which is a regulating wheel, a pressure wheel opposing lthe supporting members, a magazine having an outlet portion adjacent to the regulating wheel, one of the walls of the magazine overlapping one end of a work-piece, and the pressure wheel being skewed with respect to the work-piece to urge it against the overlapping side wall; substantially as described. e

17, In a machine of the character described, a pair of work supporting members one of which is a regulating wheel, a magazine having an outlet portion adjacent to the regulating wheel, the rear wall of the magazine having a terminal portion substantially tangent to the wheel, and the magazine also having a side wall arranged to overlap one end of a work-piece carried on the supporting members; substantially as described. 1'8. In a machine of the character described,

a pair of work supporting members one of which is a regulating wheel, al magazine having an outv let portion adjacent to, the regulating wheel, the

rear wall of the magazine having a terminal portion close to the regulating wheel, a work,

retaining and releasing member at the front of said outlet, and means for moving said last member towards or from saidrear wall; substantially as-described.

19. In a machine of the character described', a pair of work supporting members one of which is a regulating wheel, a magazine having an outlet portion adjacent to the regulating wheel, the rear wall of the magazine having a terminal portion substantially tangent to the wheel, the magazine having a side wall overlapping one end of a work-piece carried on the supporting members, and a work retaining and releasing baille at the front of said outlet and movable towards and from said rear wall; substantially as described.

20. In a machine of the character described, a pair of work supporting members for engaging a round work-piece at angularly spaced locations, a pressure member opposed to the work supporting members, a work ejector between the supporting members, and a rock shaft having arms carrying the pressure member and the ejector;`

a round work-piece at angularly spaced locations, an ejector between the supporting members, a rock shaft having an arm carrying the ejector, means for adjusting one of the supporting members with respect to the other, and means for varying the length of the ejector carrying arm; substantially as described.

22. In a machine of the character described, a pair of work supportingmembers for engaging a round work-piece at' angularly spaced locations, a pressure member opposed to the work supporting members, an ejector between the supporting members and adjacent to the .periphery of the work-piece, means for moving the pressure member towards and away from the Supporting members, and an operating connection between the ejector and said moving means for shifting the ejector substantially radially against the periphery of the work-piece from its position between the supporting members; substantially as .described.

23. In a machine of the character described,

a pair of work supporting members for engaging a round work-piece at angularly spaced locations, a pressure member opposed to the work supporting members, an ejector, an arm for swinging the pressure member, and a link connecting the arm with the ejector; substantially as described.

24. In a machine of the character described, a pair of work supporting members for engaging a round work-piece at angularly spaced locations, a pressure member opposed to the work supporting members,an ejector having a supporting arm pivotally carried by one o f the supporting members, an arm for swinging the pressure member, and a connection between the arms; substantially as described.

25.- In a machine of the character described, a pair of work supporting members for engaging a round work-piece at angularly spaced locations, a pressure member opposed to the work supporting members, an ejector having a supporting arm pivotally carried by one of the supporting members, means for adjusting said one supporting member with respect to the other, an arm forswinging the pressure member, and a link the shaft and the surrounding arm to tilt the shaft transversely therein for skewing the wheel with respect to the work-piece; substantially as described. l

27. In a machine of the character described,

- work supporting means, a pressure wheel opposed to the workasupportin'g means, a shaft rotatably supporting the wheel, a shaft support having a" pair of arms surrounding the shaft,`and opposedscrews threaded in one of the arms to tilt the shaft transversely for4 skewing the wheel with respect to a work-piece on the worksupporting means; substantially as described.

28. In a machine of the character described, means for rotatably supporting .a round workpiece and including a supporting the wheel, a shaft support having means for tiltably supporting for shifting the other end of the shaft with respect to the support to skew the wheel and thereby urge the work-piece endwise; substantially as described.

29. In a machine of the character described, means for rotatably supporting a round workpiece andA including a wheel peripherally engaging the work-piece, a shaft rotatably supporting the wheel', a shaft support, one end 'of the shaft having a ball and socket engagement with the support, and means acting between the support and another portion of the shaft to skew the shaft and wheel with respect to the work-piece; substantially as described.

30. In a machine of the character described, means for rotatably supporting a round workpiece and including a wheel peripherally engaging the work-piece, a shaft rotatably supporting the wheel, a shaft support having a pair of arms, one of the arms providing a tiltable mounting for the shaft, and a pair of opposed adjusting members interposed between the other ,arm and the shaft; substantially as described.

3l. In atmachine of the character described, meansfor rotatably supporting a round workpiece and including a wheel peripherally engaging the work-piece, a shaft rotatably supporting the wheel, a shaft support having a pair of arms, i

one of the arms having a socket, the shaft having a ball in the socket, the other arm having an opening for the shaft, and means for shifting the shaft crosswise'of the opening; substantially as described.

32. In a machine of the character described, work supporting means, a work abutment, a pressure wheel opposed to the work supporting means,v a shaft rotatably supporting the wheel, a shaft support comprising a pair of arms, one end of the shaft having a ball nd socket engagement with one of the arms, the other arm having an opening for the other end of the shaft, and means for shifting said other end of the shaft cross'wi'se of the opening to skew the wheel with respect to a work-piece on the supporting means; substantially as described..

33. 'In a machine of the character described,

a wheel, a shaft rotatably supporting the wheel,

wheel peripherally engag-l ing the work-piece, a shaft rotatably one end of the shaft, and means a shaft support having a pair of arms, one of the arms providing a tiltable support for thel shaft, the other arm having an opening for the shaft, a thimble on the shaft and having opposite sides provided with flats, and opposed screws'in said other arm .and engaging the flats; substantially as described..

34.,-In a machine of the character described, a frame,`a work head having a guide slot, a gauge, a cam in the guide slot and anchored to the frame, means for reciprocating the work head with respect to the frame, a cam follo'wer carried by the work head, and means connected to the cam follower for causing the movement of the cam follower along the cam to shift the gauge; substantially as described.

35. In a machine of the character described, a frame, a work head having a guide slot, a cam in the guide slot and anchored to the frame, thework head having a member movable to release a work-piece, a cam follower carried by the work head, and means connected to the cam fol-l lower for causing the movement of the cam follower along the cam to shift the movable member away from the work-piece; substantially as described.

36. In a machine. of the character described, work holding means having a member movable into or out of holding engagement with a workpiece, a rock shaft for moving the member, an arm connected to abutments, one ofthe abutments'being on the arm and the other abutment being normally stationary, a coil spring engaging the abutments, a rod extending into the coil spring, the rod and said other abutment having a threaded connecthe shaft, a pair of opposed tion whereby relative rotation will shift said other abutment; substantially as described.

37. In a machine of the character described, work holding means having'a member movable `into orout of engagement with a work-piece, a rock shaft for moving the member, an arm connected to the rock shaft, a rotatable rod extending through the armand having an abutment, a spring between the abutment and .the arm. and surrounding the rod, the rod having a portion provided with internal threads, and a screw anchor member engaging substantially Y.as described.

38. In a machine of the character described, work holding means having a member movable into. or out of engagement with a work-piece, a

rock shaft for moving the member, an arm conlnected to the shaft, a rotatable member carry-` ing a spring abutment, a spring between the abutment and the arm,`and an anchoring member having screw threaded engagement with the abutment carrying member; substantially as described.

39. In a machine of the characterdescribed, work supporting and rotating means comprising a rotatable regulating wheel vfor peripheral rolling engagement with around work-piece,

means for holding the Work-piece in rolling con-` mem tact with the/wheel, a grinding er opposed to the regulating wheel, means grinding member and the regulating wheel to have relative reciprocation vto grind the workpiece, a ring at the endof the regulating wheel and forming anannular projection extendingbeyond the periphery of the wheel, and means for detachably securing the ring to the end of the wheel to provide for facing the periphery of the wheel by the grinding member when the ring is removed; substantially as described.

for causing the' said internal threads;

work supporting and rotating means comprising.

a rotary wheel, a bracket having a chamber with an outlet slot adjacent to the wheel, and means for supplying coolant to the chamber; substantially as described.

41. In a machine of the character described, a magazine having aside wall provided with a laterally projecting work supporting iin, a companion side wall having a slot for the n, and means for adjustably supporting the companion side wall at selected distances from the first side Wall; substantially as described.

42. In a machine of the character described, a magazine having a side wall provided with laterally projecting work supporting ns, one of the ns sloping downwardly towards the rear, another of the fins forming a bottom wall sloping downwardly towards the front, anda companion side wall Qspaced from the rst side wall; substantially as described.

, 43. In a. machine of the character described, a magazine having a side wall provided with laterally projecting work supporting ns, one of the ns sloping downwardly towards the rear, 1

, another ofV the fins forming a bottom wall sloping downwardly towards thefront, and another of the ns forming a front wall; substantially as described.

RAYMOND H. CRAMER. 1

Images