US730455A - Machine for grinding cutters. - Google Patents

Description

PATENTED JUNE 9.190s.

I B. M. w. HANSON.

MACHINE FUR GRINDING UUTTERS. I Arrmuu'zon nun nov.1,-1902.

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B. M. W. HANSON. MACHINE FOR GRINDING GUTTERS.

APPLIOATIOH Hum Nov. 1, "1902. V

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' B. M. Ransom.

MACHINE FOR-GRINDING GUTTBRS.

APPLICATION FILED NOV. 1, 190 2.

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Patented June 9, 1903.

' UNITED STATES PATENT OFFICE.

BENGT M. \V. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT 8t WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

MACHINE FOR GRINDING CUTTERS..

SPECIFICATION forming part of Letters Patent No. 730,455, dated June 9, 1903. Application filed November 1, 1902. Serial in. 129.649. on. model.)

To aZZ whom it may concern.-

Be it known that I, Boner MAGNUS WIL- HELM HANSON, a subject of the King of Sweden and Norway, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvementsin Machines'for Grinding Gutters, of which the following is a specification.

Myinvention relates to machines for grinding cutting-tools of the disk-shaped variety, and is shown employed for sharpening the teeth of milling-cutters, although not limited to such use.

One of the objects of the invention is the provision of means for grinding the sides of the cutting-teeth, and inconnection therewith devices for indexing or'turning the blank step by step, so that when one tooth has been ground another will be brought into position, and so on until the sides or flanks of all of the teeth have been sharpened.

. A further object of the invention is the provision of means for grinding the ends of the teeth, thereby imparting the desired relief thereto and also bringing the points of all said teeth to the same true circumferential position.

A further object of the invention is the pro vision of improved means for indexing the blank.

A further object of the invention is the provision of means 'for simultaneously reciprocating the grinding-disks and of devices for adjusting said disks toward and from the axis of the blank-support or at an angle thereto, aswill be hereinafter described.

In the accompanying drawings, Figure lis a perspective view of my improved machine. Fig. 2 is atransverse section of the machine, taken about on line to w of Fig. 1, parts being inelevation. Fig. 3 is an end View of the machine, part ofthe frame being removed and the driving-shaft being represented in section. Fig. at is a detached perspective representation of the ca m-shaft and the means for connecting the same with the bell-crank sented in said figure.

or angle levers and their adjuncts for reciprocating the cutter-slides. Fig. 5 is a section taken on line 00 it of Fig. 4, a portion of the bed-plate of the machine also being repre- Fig. .6 is anend view I of a support of the machine, showing the devices for engaging the teeth of the cutter, and thus enabling true indexing of the same to be accomplished. Fig. 7 is a longitudinal vertical section of the top of one of the cutter-carrying slides, a part of said slide being shown in elevation.- Fig. 8 is a longitudinal vertical section of the bearing in which the cutter-carrying spindle is mounted, the cutter, and the notched indexing-disk, said spin- ,dle being shown partially in section and partially in elevation, and a rod being also illustrated as fitting within the bore of the spindle. Fig. 9 is a section on line :1 y of Fig. 2, certain parts being removed; and Fig. 10 is a detail in perspective of part of the means for reciprocating one of the grinder-shafts of the machine.

Like numerals designate similar parts throughout the several views.

Referring to the drawings, the numeral 5 designates suitable framework, shown consistin g of a hollow pedestal rising vertically from a base 6 and hearing at its top a bedplate 7, having a circumferential groove 8in its upper surface and a similar groove 9 in its rim. Secured by bolts or otherwise to this bed-plate is a head 10, havinga divided hearing 12, in which is journaled a shaft 13, carrying an index-wheel 14, said shaft being tubular to receive a rod 15, headed at at one end and threaded at its opposite extremity to receive a nut 16, as illustrated in Fig. 8, in

which a blank 17 to be sharpened is shown clamped against a-collar 13 of said shaft by a washer l8, slipped over the rod just back of head 15. At its rear end the tubular shaft 13 is threaded at 13 to receive a flanged nut 19, having a peripheral bearing 19, upon which is fitted the hub of a lever 20, slotted at 20, and carrying at its free end a stud 21, upon which is mounted a weighted pawl 22, although pawls of other kinds may be substituted therefor, if desired.

Adjustably mounted in the slot 20" of lever 20 is a bolt 23, upon which is threaded a wingnut 24, said bolt passing through an opening in the upper end of a rod 25, articulated at to the fork of a rod 26, movable in the bore of a box 27, threaded into the bed-plate 7 and chambered to receive a spring 28, sur- KOO rounding the rod 26 and bearing against the upper wall of the bore in the box at one end and against a collar or enlarged part of the rod at its opposite end, as illustrated in Figs. 2 and 3. At the lower end this rod 26 is provided with a conical or other suitably-formed extremity 26, which engages the surface of an indexing-cam, hereinafter described.

Designated by 29 is the main shaft of the machine, which is journaled in bearings 30 30, depending from the bed-plate 7, and carries at its outer end a belt-pulley 31 and at its inner end a crank-disk or its equivalent, 32, having a wrist-pin 32, as shown more particularly in Fig. 2. Bolted to the bed opposite to the bearing 30, which is secured thereto in a similar manner, is a plate 33, said plate being at such distance from the bearing that a guideway 34 for the reception of a slide 35 is formed between them.

Secured to the shaft 29 is an indexing-cam 36, having a gradually-rising periphery 36 for the greater portion of its circumference, a nose 36 and a short rose or enlargement 36 immediately succeeding said nose, said cam actuating the rod 26, and through the connections above described the pawl-carrying lever 20, the spring 28 returning the lever and its connections to normal positions after the cam has actuated them, and thereby imparting a step-by-step movement to the notched disk 14.

Projecting from any suitable part of the head 10 (shown as from one of the bearings 12) is a standard 37, having a split bearing 37, the jaws of which are closed by a screw 38, and fitted in this split bearing is a rod 39, having a split head 39'. Mounted in the bore of said split head 39 is a shank 40, adjustably secured therein by a screw 41, which contracts the jaws of said head to clamp the same against said shank, the latter carrying a split head 40, closed by a screw 42 against the stem of a resilient stop-finger 43, said finger being either made integral with its stem, as shown, or attached thereto, as desired. 'lhis finger rides upon the'teeth of the cutterblank 17 as it is indexed and successively snaps behind them for a purpose hereinafter described.

From the head 10 projects a rod or bar 44, having a split head 44, the jaws of which are contracted by a screw 45, and in the opening between these jaws is inserted a rod 46, provided with a split head 46, whose jaws are contracted by a screw 47, and between these jaws is inserted a rod 48, having a resilient stop-finger 49'either integral therewith, as shown, or secured thereto, said finger 49 bearing against the edge of the cutter-blank opposite to the finger 43. Both stop-fingers are not in use at the same time, and while one is employed the other is adjusted out of the path of the cutter-blank, (see Fig. 6,) as will hereinafter be explained' Fitted in an inclined socket of the head 10 is a plunger 50, normally thrown forward by a spring 51, upon which it rests, the forward end of said plunger being of a shape to engage the teeth of the index-wheel 14, and said plunger tending when permitted to turn said wheel a short distance, as will be explained.

Designated, respectively, by the numerals 52 and 53 are plates shown fitted for sliding adjustment upon guideways 54, projecting from blocks 55 55, as shown in Figs. 1, 2, and 4, each of said plates being flanged at its edges to cover its gnideway and exclude dust, &c., therefrom, and each plate being capable of adjustment back and forth upon its support by means of a screw 56' 57, respectively, as illustrated in Figs. 1 and 2.

In bearings 52 of a standard projecting from the plate 52 is journaled a shaft 58, carrying at one end a belt-pulley 59 or suitable substitute for said pulley for applying power to shaft 58 and at its other end a grindingdisk 60, abutting against the outer end of a dust-excluding cap 61 and held in place on the end of the shaft by a nut 62 and washer 63, and in similar bearings of a standard 53, rising from plate 53, is mounted a shaft 64, carrying a belt-pulley or other device for transmitting power, 65, and a grindingdisk 66, the shaft being also equipped with means like those of shaft 58 and designated by the same numerals for securing the grinding-disk in place and for excluding dust and each of the pulleys 59 and 65 having dustexcluding caps 59 and 65'. In the hub of pulley 59 is a circumferential groove 59 for the reception of pins projecting from a yoke 67 at the upper end of an arm 67, sleevedupon and secured to a rod 68, said rod having a lateral pin or lug 69, received in a slot of the upper arm 70 of a bell-crank lever 70, pivoted at 71 to a bracket 72, depending from the block 55. Projecting from the other arm 70 of said bell-crank lever 70 is a pin 73, which is received in a circumferential groove 74 of a disk 75, carried by the slide 35, and this slide is provided with a slot 35, having double inclined walls for the reception of the wrist-pin 32, the construction being such that as the pin 32 travels up the double inclined wall of the slot it will raise said slide until the apex of'the incline is reached, and then as it travels down the other part of the slot will lower said slide, thus rocking the bell-crank lever first in one direction and then in the other directionand imparting through the rod 68 and arm 67 a reciprocatory movement'to the shaft 58, carrying the rapidly-revolving grinding-disk 60, which upon both of its strokes operates to dress the side of the tooth in position for operation. Simultaneously with the movement of the slide 52 and grinding-disk 60, the latter operating upon one side of the tooth, the shaft 64 is reciprocated in the same manner, and its disk 66 dresses the opposite side of a tooth. Inasmuch as the lever-and-rod mechanism for reciprocating the slides is the same for each, the parts of said mechanism are designated by the same numerals in all of the figures of the drawings.

As thus far described, the machine is in position to operate simultaneously upon the sides of teeth, and after all of the teeth have been thus ground it is necessary to grind their ends to bring them to the same circumferential position and to afiord the proper relief. For accomplishing these results a third guide-block 76 is secured to the bed-plate 7, and on it is mounted a slide 77, having a standard 77, said slide being operated by a screw 78, working in a nut in the block for purposes of adjustment toward and from the axis of the spindle carrying the cutter-blank, the slide just mentioned being parallel with said axis.

In bearings of the standard 77' is journaled a spindle 78, carrying a grinding-disk 79 and a belt-pulley 80, said spindle being rotated by the belt-pulley and 'reciprocated by a rod 68 and arm. 67, having a fork working in the groove of said pulley just as described with reference to the pulleys 59 and 65, the only difierence being that in lieu of the bell-crank 70 a shaft 86 is journaled in bearings of the bed and is provided at one end with a horizontal arm 87, having. a pin 87 entering groove 74 of disk 75, and at its opposite end with a vertical arm 88, having a fork 88, in which a reduced end of the rod 68 is secured, as shown in Figs. 9 and 10. Y Here it is distinctly to be understood that the invention is not limited to the means shown and described for simultaneously reciprocating the rotary shafts to which the grindingdisks are secured, for other means may be employed for this purpose without departure therefrom, While the disks and 66 are grinding the flanks of the teeth, the stopfinger 4:3 is in use, and the stop-finger 4:9 is by. the means described adjusted to such position (see Fig. 6) that it will be out of the line of movement of the cutter-blank 17; but after the sides of all of the teeth have been ground said stop-finger 43 is similarly adj usted to an inoperative position and the finger 49 is brought into action. Owing sometimes to slight irregularities in the teeth of the blank, it is impossible to index the same correctly by the toothed index-wheel 14; but by first turning said wheel bythe means described or a suitable substitute therefor and then im parting an additional impulse to said Wheel a tooth of said blank is forced against the stop-finger in position, thus bringing said tooth to the exact place requiredand holding it there until the dressing-tools have acted upon it.

It is distinctly to be understood that my improved indexing mechanism'is not limited to a machine of the kind described, for it may be employed in connection with variouskinds ferent from that shown, if desired.

By first overiudexing a toothed or fluted blank in one direction and then imparting automatically to said blank an impulse in the oppositedirection until a tooth thereof engages a stop important results in accurate indexing are accomplished and an imperfect tooth or flute. may be properly indexed and then operated upon.

For the purpose of bringing the grindingdisks 60 and 66 into the desired positions with relation to the work being done each of the blocks 55 55 is secured to the bed 7 in such a way that it may be adjusted circumferentially thereof and then clamped rigidly in place, and while any suitable devices may be employed for accomplishing this result without departure from the invention those shown consist of lever-screws 82, passed through the blocks, and flanged nuts 83, fitting in the circumferential groove 8,with which said screws engage, said groove being enlarged at 8 to receive the nuts, and each block being provided with a lug 84, entering the top of the groove and serving to guidethe block as it is adjusted, and to facilitate accurate adjustment the bed 7 is preferably graduated at 85, as shown in Fig. 1.

In practice my improved machine operates as follows: In the exemplitication given a cutter-blank 17, the teeth of which are to be ground, is clamped upon the arbor l3, and the stop-finger 43 is adjusted to proper position with relation to the teeth thereof.

.Blocks 55 55 havingbeen set and secured in the flanks of the teeth. Power is now applied to the belt- pulleys 31, 59, and 80,

thus setting in motion the cam-shaft 29 and shafts 58, 64, and -78', carrying the grindingdisks 60, 66, and 79, the latter being at this time withdrawn, so that it will not engage the work. As the camshaft rotates the wristpin 32", acting upon the wall of the slot 35 in slide 35, will reciprocate said slide in the guideway' d t, thereby also reciprocating the grooved disk 75, and through the bell-cranks 7O the rods 68, connected to the shafts 58 and engagement with a tooth of said wheel 14, to

IIS

index the blank. As the rod drops from the nose of said cam it is next raised by the enlargement 36 thereof, thus causing the pawl to be slightly withdrawn from the tooth and the index-wheel to permit the plunger 50 to act upon the wheel and turn it and the shaft to which it is attached far enough in the opposite direction to force a tooth of the blank 17 against the resilient stop-finger 43, thereby correctly indexing said blank and holding it firmly in position while the disks and 66 are dressing the sides of the tooth under operation. After the teeth of the blank have been dressed in the manner described the wheel 14 is again turned to bring another tooth thereof into position, and this action is repeated until all of the teeth of the blank have been acted upon, when the slides 52 and 53 will be withdrawn, and the rod carrying the stop-finger 43 will be adjusted so that said finger will not engage the blank. Stop-finger 49 is now thrown into position for action upon the blank in a manner like that of said stopfinger 43, and the slide 77 is adjusted by screw 78 to carry the rapidly-rotating shaft 78 into the position necessary to cause the edge of grinding-disk 79 to engage the ends of the teeth of blank 17, the axis of said shaft 78 being slightly above that of shaft 13, so that said disk 79 will not only reduce the end of the tooth, if it should be too long, but will also impart the proper clearance thereto. After the end of one tooth has been thus located the index-wheel is again turned to cause another to be brought to a place opposite the edge of disk 79, this action being contin ued step by step until said disk 79 has acted upon all the teeth, when the completed blank is removed and a new one placed in position,

By the provision of the spring-actuated plunger 50 or a suitable substitute therefor and the peculiar construction of the indexing-cam 36 an important result is achieved, for the blank is always held firmly against the stop-finger in position and is prevented from movement during the grinding opera tions.

My invention is not limited to any special disposition of the parts, for although preferably arranged horizontally, as shown, they may be otherwise located; nor is it limited to the precise arrangement shown nor to belt-gearing for driving the Various shafts. Changes in the size and proportions of the various elements of the machine may also be made, and it is furthermore not restricted to any special kind of indexing mechanism nor to grinding-disks, for the blank may be reduced by other means.

Having thus described myinvention, what I claim is 1. The combination, with a rotary blanksupport, of means for simultaneously dressing the blank upon its sides; means for indexing the blank; and a stop cooperating with said indexing means.

2. The combination, with a rotary blanksupporting shaft, of means for simultaneously dressing the blank upon its sides; an index device secured to said shaft; and means for intermittingly actuating said index device.

3. The combination, with a shaft, of means for securingablank thereto; an index-wheel; a stop-finger; means for intermittingly actuating said index-wheel; and means for imparting an additional impulse to said wheel, thereby partially turning the shaft until further movement is resisted by said stop-finger.

4. The combination, with a work-supporting shaft, of means for securing a toothed blank to said shaft; a stop-finger adapted to engage the teeth of said blank; means for indexing the shaft; and means for imparting an additional movement to the shaft to force a tooth of the blank against said stop-finger.

5. The combination, with a work-supporting shaft, of an index-wheel secured to said shaft; a device adapted to engage and inter mittingly rotate said index-wheel; means for temporarily relieving said device from contact with the index-wheel; a stop; and a device for actuating the index-wheel when relieved from the action of the device for intermittingly rotating it.

6. The combination, with a bed-plate, of a head secured to said bed-plate; a shaft journaled in said head; means for securing work to said shaft; an index-wheel attached to the shaft; devices for dressing the work; means for actuating said devices; means for actuating the index-wheel; astop-finger adapted to engage the Work; and means for forcing the work against said stop-finger.

' 7. The combination, with a bed-plate, of a head secured to said bed-plate; a shaft journaled in bearings of the head; means for securing a blank to said shaft; an index-wheel attached to said shaft; means for intermittingly actuating said index-wheel; a stop-finger; mechanism for temporarily relieving the index-wheel from the action of its actuating means; and a device for turning the shaft, when said wheel is relieved, until the movement thereof is arrested by the stop-finger.

8. The combination, with means for supporting work, of rotary shafts; tools for dress- ICC in g the Work carried by the shafts; lever-andthe shafts; and means for actuating said mechanisms.

11. The combination, with a head, of a support for said head; a shaft journaled in bear ings of the head; means for securing work to said shaft; slides, each having bearings; r0- tary shafts mounted in the bearings of the slides; dressing-tools carried by the shafts;

means for adjusting the slides; lever-and-rod mechanisms for reciprocating the dressingtools; and means for actuating said mechanisms.

12. The combination, with a bed-plate, of blocks secured thereto; means whereby said blocks may be circumferentially adjusted on the bed-plate; slides carried by the blocks; means for adjusting the slides; shafts mounted in bearings of the slides; dressing-tools carried by the shafts; and means for simultaneously reciprocating said dressing-tools.

13. The combination, with a grooved bedplate, of blocks mounted on said bed-plate; means carried by the blocks and fitted in the groove of the bed-plate for guiding said blocks thereon; means for clamping the blocks when adjusted; guideways carried by the blocks; slides mounted on the 'guideways; means for adjusting said slides; shafts mounted in bearings of the slides; dressing-tools carried by the shafts; means for reciprocating said dressing-tools; and means mounted on the bedplate, for supporing work to be acted upon by said dressing-tools.

14. The combination, with a bed-plate, of a block havinga guideway; means for adj ustably securing said block to the bed-plate; a slide mounted on the guid-eway of the block; means for adjusting said slide; a rotary shaft mounted in a bearing of the slide; a dress ing-tool carried by said shaft; a rod connected to the shaft, and adapted to reciprocate the same; an angle-lever for'reciprocating the rod; and means for actuating said anglelever.

15. The combination, with a rotary shaft, and with means for supporting the same, of an arm connected to said shaft; a rod carryin g said arm; an angle-lever for reciprocating the rod; a slide foractuatin g the angle-lever; and means for reciprocating said slide.-

16. The combination, with a rotary shaft, and with means for supporting the same, of an arm connected to said shaft; a rod carrying said arm; an angle-lever for reciprocating the rod; a slide having a grooved'head for receiving a projection of the angle-lever;

Y and means for reciprocating said slide.

17. The combination, with a rotary shaft, and with means for supporting the same, of an arm connected to said shaft; a rod carrying said arm; an angle-lever for reciprocating the rod; a slotted slide having a grooved head; and a rotary shaft having a wrist-pin cam; a rotary shaft upon which the said cam is mounted; means controlled by the indexing-cam for actuating the index-Wheel; a slide actuated by the cam-shaft; an anglelever controlled by said slide; a rotaryshaft; means for'supporting said shaft; a dressing tool carried by said shaft; and means controlled by the angle-lever for reciprocating the shaft.

19. The combination, with a head, of a shaftmounted in bearings of said head; an index-wheel secured to said shaft; means for clamping work to the shaft; a rotary camshaft; an indexing-cam carried by said came shaft; means controlled by the indexing-cam for actuating the index-Wheel; a support; a shaft journaled in bearings of said support; a dressing-tool carried by said shaft; and means controlled by the cam-shaft for reciprocating the shaft carrying the dressing-tool.

20. The combination, with a work-support, of means for securing a toothed blank to said work-support; means for indexing the blank; a stop against which each tooth of the blank is forced by the indexing mechanism; rotary and reciprocatory tools for dressing the sides of the teeth of said blank; and a rotary and reciprooatory tool for dressing the ends of the teeth of said blank.

21. The combination, with a head, of a shaft journaled in bearings of said head; means for securing work to said shaft; means for dressing said work; means for indexing the shaft; a stop; and means for partially rotating the shaft to force the Work against said stop. V

22. The combination, with a head, of a shaft mounted therein; means for securing work to said shaft; an index-wheel rigid with the shaft; means for actuating said indexwheel; a stop; means for imparting an additional impulse to the index-wheel to force the work against said stop; and means for dressing the work.

23. The combination,with a shaft, of means for securing a toothed blankto said shaft; means for supporting the shaft; a movable stop-finger; an index-wheel secured to the shaft; a pawl for engaging the index-Wheel;

' means for actuating the pawl; and a device acting against the index-wheel, and serving to force a tooth of the blank against said stop-finger.

24. The combinatiomwitha shaft, of means for supporting said shaft; means for clamping a toothed blank to the shaft; an indexwheel secured to the shaft; a pawl adapted to engage the teeth of the index-wheel; a pawlcarrier; an indexing-cam; means controlled by said cam foractuating the pawl-carrier; a spring for returning the carrier-actuating means; a stop for engaging the teeth of the blank; means for slightly retracting said pawl subsequent to the main part of each indexing operation; and means for turning the shaft to force the teeth of the blank successively against said stop.

25. The combination, with a shaft, of a toothed indexing-wheel secured to said shaft; a pawl adapted to engage said wheel; a pawl carrier; an indexing-cam; means controlled ;by said cam for actuating the pawl-carrier; a

as the pawl is successively relieved from contact with the teeth of the index-wheel. 26. The combination,with ashaft, of means .for securing a blank thereto; an index-wheel;

a stopfinger; devices for actuating the indexwheel; means for relieving said devices from the control of said index-wheel; and means for actuating said index-wheel, to turn the shaft and cause the blank to be forced against said stopfinger.

27. The combination,witha shaft, of means for securing a toothed blank thereto; a resilient stop-finger; an index-wheel secured to the shaft; pawl-and-lever mechanism for ac tuating said index-wheel; means for relieving said pawl-and-lever mechanism from the control of the index-wheel; and a device hearing against the index-wheel, and serving to turn it and to force a tooth of the blank against the stop-finger.

28. The combination, with a shaft and with means for attaching work thereto,of a toothed index-wheel; a pawl; a lever carrying said pawl; a stop; means for first actuating and then relieving the pivoted lever to turn the index-wheel, and then relieve the pawl therefrom; and means for again actuating said lever, pawl and index wheel until further progress of the shaft is resisted by said stop.

29. The combination, with means for supporting a blank, of a rotary shaft; a dressing-tool secured to said shaft; an arm connected to the shaft; means for reciprocating the arm; a slide having a groove in its end; a device having a pin fitted in the groove, said device constituting part of the means for reciprocating the shaft; and means for actuating the slide. v

30. The combination,withablank-supporting shaft, and with means for actuating the same, of stops located on opposite sides of the axis of said shaft; and means whereby one of said stops may be thrown out of action while another is in position for operation.

31. The combination, with a blank-supporting shaft, of means for indexing said shaft in one direction; means for relieving the action of the indexing devices; a pair of stops; means for throwing either of said stops out of action; and means forimparting an impulse to the shaft in the opposite direction, to force the blank against the stop in position.

32. The combination,with a shaft, of means for securing a toothed blank to said shaft; a bearing; a rod adj ustably secured in said bearing; a stop carried by the rod; and means for automatically turning the shaft to force a tooth of the blank against said stop.

33. The combination, with a shaft, of means for intermittingly turning said shaft in one direction to index the same; means for securing a toothed blank to the shaft; a stop; and means for automatically turning the shaft in an opposite direction to force a tooth of the blank against said stop.

34. The combination, with a shaft, of means for securing a toothed blank to said shaft; 2. pair of stops adapted to engage the teeth of said blank; means whereby either of said stops may be thrown out of position to engage said teeth; means for indexing the shaft; and means for turning the shaft to force a tooth of the blank against a stop in position for action.

35. The combination, with a shaft, of means for securing a blank to said shaft; means for indexing the shaft; a stop-finger; means for turning the shaft to force a tooth of the blank against the stop-finger subsequent to the indexing operation; and means whereby the stop-finger may be thrown out of position to engage the teeth of the blank.

36. The combination, with means for supporting a tooth-blank, of means for indexing said blank in one direction; a stop; and means for automatically actuating the blank-sup porting means for forcing a tooth of the blank against said stop.

37. The combination, with means for supporting a toothed blank, of means for indexing said blank; a split bearing; a rod adjustably secured in said bearing; said rod having a split head; a stop-finger, the stem of which is inserted in an opening of said split head; means for clamping said split head in position; and means for actuating the blank-support, and forcing a tooth of the blank against said stop-finger.

38. The combination, withashaft, of an index-wheel secured to said shaft; means for intermittingly turning said index-wheel; means for securing a toothed blank to the shaft; a rod; means for adjustably securing said rod in position; a stop-finger; means for adjustably securing said stop-finger to the rod; and means for turning the index-wheel to cause the teeth of the blank to be forced against said stop-finger.

39. The combination, with a bed-plate, of a head; a shaft journaled in bearings of said head; means for securing work to the shaft; a stop adjustably connected to the head; and means for forcing the work against said stop.

In testimony whereof I affix my signature in presence of two witnesses.

BENGT M. W. HANSON.

Witnesses:

G. E. BUTLER, H. E. BAILEY.

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