US1433880A

US1433880A - Collet-forming machine

Info

Publication number: US1433880A
Application number: US429301A
Authority: US
Inventors: Charles J Fancher; Robert A Johnson
Original assignee: National Acme Co
Current assignee: Devlieg Bullard Inc
Priority date: 1920-12-09
Filing date: 1920-12-09
Publication date: 1922-10-31
Anticipated expiration: 1939-10-31

Description

C. J. FANCHER AND R. A. JOHNSON.

COLL ET FORMING MACHINE.

RPPLICATION- FILED DEC. 9| I920.

Patenmd- M 31, 1922.

2 SHEETS- 8min 1- Patented @ct. Ell, i922.

CHARLES J. FANCHER AND ROBERT A. JOHNSON, OF WINDSOR, VERMONT, ASSIGNORS TO THE NATIONAL ACME COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

COLLECT-FORMING IEACHINE.

Application filed December 9, 1920.

1 0 all whom it may ooncern Be it known that we. CHARLES J. Fanonnn and Bonner A. JOHNSON, both citizens of the United States, residing at ll 'indsor, in the county of yVindsor and State of Vermont, have invented certain new and useful Improvements in Collet- Forming llllachines, of which the following is a specification.

This invention relates to collet forming machines, and particularly to a machine which is adapted to form and shape in a single operation the gripping fingers on pressed steel feed collets for metal working machines.

An important object of this invention is to provide a machine adapted to be employed in connection with the manufacture of feed collets shown and described in our copending allowed application for an improvement in feed collets, Serial No. 358,501, filed February 1.3, 1920, and in our co-pending divisional application thereof for the method of making feed collets, Serial No. 417,646, filed October 18, 1920, and which machine is simple in construction and oper ation, durable and elfective in use and economical. to manufacture.

In the manufacture of feed collets in accord ance with the methods described in our above co-pending applications, the blank for the collet which is preferably first stamped or otherwise formed out of pressed sheet steel with. projecting finger pieces, is placed in a ceiling machine and by the action of suitable instrumentalities the blank is bent, rolled or formed up into a hollow feed collet having projecting gripping lingers. This coiling of the blank nto the feed collct is described and claimed in our co-pending application for coiling machine,

and forms no part of the present invention.

After the operation of coiling the blank into the collet having projecting fingers, it is necessary to provide suitable means for forming the fingers of the feed collet into the desired shape, and it is the object of the present invention to provide a collet fornr ing machine which embodies certain novel instrumentalities and mechanism which will in a single operation formthe lingers of the collet into the desired shape.

Other objects of this invention will appear as the description proceeds, reference being had to the accompanying drawings Serial No. 429,301.

forming a part of this specification, where- 1n like reference characters indicate similar parts throughout the various figures, and wherein Fig. 1 is a front elevation of the present machine; Fig. 2 is a side elevation thereof; Fig. is a detail front view partly broken away and on a somewhat larger scale disclosing the forming mechanism; Fig. 4 is asectional side elevation thereof; Fig. 5 is a detail plan View partly in section of the slide mechanism for the forming jaws; 'Fig. 6 is a perspective view of a forming jaw and related parts; F 7 is a detail view showing the jaws in closed position; Fig. 8 is a perspective view of the ejector mechanism; Fig. 9 is a-detail view showing the knockout cam; Fig.10 is a perspective view of an uniformed collet; and Fig. 11 is a perspective view of a formed collet.

Qur invention has to do merely with the formin and shaping of the gripping fingers of a feed collet after the same has been coiled or formed up from a sheet metal blank into a hollow tubular form, and in the present instance the various elements making up the invention are incorporated in a suitable power driven machine.

In the machine shown, the framework comprises a standard or base 2 comprising suitable legs 3. The base or bed 2 is provided with upwardly extending bearings 4 and adapted to receive a crank shaft 6 having the usual power driven wheel 7. The machine is provided with the usual treadle 8 with, suitable connecting mechanism 1011 for the clutch adapted to connect and disconnect the wheel 7 from the crank shaft. The crank shaft 6 is connected to a rotary cam ring 15 by means of a connecting rod 12 carried respectively by cranks or

crank pins

13 and 14. To the base of the machine is bolted or otherwise secured a forming mechanism support or head 16 shown as circular and provided centrally thereof with a forming arbor 21. A bushing a6 is held in an opening in the support 16 by means of three collar screws 55, one being shown in Fig. 4t and the forming arbor 21 is securely held in this bushing by means of a screw 56 and washer as illustrated in this figure.

The camming ring 15 is so mounted with respect to the forming head 16 as to have a rotary movement relatively thereto and in order to accomplish this the camrning ring is held in position on the forming head 16 by means of three attaching plates 17 securely bolted to the ring (see Fig. 4t) and adapted to slide in grooves 1'7 formed in the periphery of the forming base 16. Attached to the camming ring 15 by means of bolts 19 are a. plurality of cams 18, three being provided by way of illustration in the present instance, and by means of slots 20 the cams may be adjusted in position as desired.

Bolted to the front face of the forming head 16 are slide supporting members and 26 F igs. 3 and 5), -forming ways or guides for the slides- 27. These slides 27 are provided with slots 29 at their outer ends for the reception of rolls 28 mounted on studs 30. The i'orming aws 81, the working faces of which have a curved or segmental formation, are secured to the slides 27 by means of a rib 33 inserted in a slot 34 in the slide and bolted thereto. These slides 27 are each adapted to be normally held in idle or open position. as illustrated in Fig. 3, by means ot a coiled spring 35. This spring is confined in a hole 36 (see Figs. 1 and 5) drilled at the junction of the slide bearing members The free end of the spring carried in a sleeve 37, which is connected to the slide 27 by means of a pin 38. This pin maybe screwed into the side Off th sleeve and fits into a hole in the slide. A portion'of the slide bearing membe'rs 25 is cut away as at 39 shown in Fig. 1 to form a slot between the two members through which the pin 38 is adapted to operate.

In operation the uniformed piece 22 is placed upon the arbor 21, and when the clutch 9 is ei'igaged, the crank shaft nntkes one revolution thereby causingthe cam ring 15 to make about one-eighth of a leVOllitiOll in a cou11te'r-clocl' wise direction, and then return to idle position. ,When the cam ring revolves on the forming head 16 the cams 6 are brought into engagement with the rolls 28 carried in slides 2?. By this action of the cams, the slides carrying the forming jaws 31 are forced toward the arbor 21 to the closed position shown in Fig. 7 and the piece to be formed is pr sed tightly between the arbor and the j aws, thus forming it into the finished piece 23 sl'iaped as illustraced in Fig. 11.

Duri g'the last part of the revolution of the C11 uh shaft, which is about one-eighth of a turn and when the cam ring 15 has nearly returned to its position of rest, and

after the torini'i'ig jaws 31 have opened by meanest springs sulliciently to allow tli e removal of the formed piece 23, a cam 10 (see Figs. 2 and 9) engages a lmock-out lever 411, thus actuating the same and resulting in the ejection of the finished piece from the arbor 21. This is accomplished by means or an ejector ring 4-2 (see Figs. i and 8), which has a free sliding fit on the arbor, and which of course must be changed in case it desired to use a different size arbor. For the purpose of enabling the ring 412 to be changed or replaced, three rods 13 are riveted into the ejector ring as shown in Fig. 8, and these rods are attached to ejector rod a l with set screws by means of the collar 45. The rods 4-3 slide freely through holes in bushing The knock-out or ejector lever 11 has a cushioned or safety connection on the rod 14 by means of two springs at? held in position by means of fastening collars as as illustrated in Fig. 2. This cushioned connection is designed for the purpose of eliminating any accidental damage to the mechanism in case the slides 27, which as hereinbeiore stated, are returned to idle or open position by springs 35, should for any reason tail to operate. in which case the ejector ring would strike against the ends of jaws 31. Thus the resilient connection of the knock out lever ll to the ejector rod eel in such a case would operate to prevent damage to the ejector ring 12 in contacting with the jaws 31.

The collar 50, which carries the knock-out cam 40 may be the usual brake collar used on conventional power presses. This knockout cam 10 is fitted into a groove out in the side of the collar 50, and is held by screws, and as illustrated in Fig. 9, may be adjusted in the desired position for the proper timing of the ejector.

The forming arbor 21 (see Fig. 1) is preferably shaped so as to have substantially a cylindrical body portion 60, an intermediate portion 61 having a tapered formation, and an outer end portion 62, illustrated in the present instance as cylindrical in shape, although of course the end portion 62 may be formed in cross section of any desired shape, i. e., hexagonal or square. Each of the segmental a'ws 31 have their under surfaces in like manner formed to correspond and cooperate with the surfaces 60, 61 and 62, as shown particularly at 6-8, 6 1 and 65, in 6. The edges of the jaws 31 are beveled at 66, in the present instance at substantially 12) so that in the closed position of the jaws as, seen in Fig. '7 the adja cent beyeled edges thereof will coincide and the segmental portions will unite into a completely formed bore having substantially continuous unbroken walls. Although the applicants have illustrated in the present case three slides 27 and jaws31, it is obvious that a larger or smaller number may, it desired. be employed without departing from the spirit of the invention, and in such cases the bevel-s '66 would be made at such angle as to cause-the adjacent jaws to cooperate with each other as above described.

ill)

It will be observed from Fig. 1.0 that the uniformed coiled piece or collet 22 comprises a hollow or tubular body portion having projecting portions or linger pieces 22. This body portion also may preferably be provided with a shouldered portion 2& The arbor L l. comprises a body portion of substantially the same diameter as the bore of the shoulder portion 2a oi the piece 22, when a shoulder is formed prior to the form-- ing of the lingers thereby to permit the colle to he slipped on and oil of the arbor. The projecting portion of the piece 22 may be shaped in any desired manner so as to comprise a gripping portion adapted to grip and :teed the work when the collet in use is attached to the teed member ot a metalv working machine. lVhen, as shown in Fig. lo, the collet is provided with the shoulder portion 24/ prior to the shaping of the fingers, the bore of the jaws 31 formed by the segmental. tacos (33 will have substantially the same diameter as the larger diameter of the body of the collet. In the present case, tor the purpose of illustration, we have shown the collet body with three projecting portions or finger pieces although of course it is readily understood that a less number or a larger number may be provided without in any way atl'ecting the present invention, the essence of which is to shape the projecting portion or portions of the coiled collet body into gripping portions. In the present case the arbor has a tapered portion (51 and the segmental part 32 ot' the jaws 31 has a correspondingly tapered portion 6 h The shape of these parts may be varied as the occasion demands, and as heretotore stated, the portions 62 and 65 may be hexagonal, cylindrical, square. etc. to provide correspondingly shaped. gripping portions 223 to correspond to the shape of the work to he gripped thereby.

Although we have described a. preferred embodiment of our invention, it is to be understood that we do not limit or confine ourselves to the exact construction disclosed, but may make such changes in details of ('(lIlSlllllCtlOIl or otherwise as will not depart from the spirit of our invention, as defined in thi appended. claims.

o claim as our invention:

1. In a collet :t'orming machine, the coinl)lllH,t-i0l l ol -ollet suppo f means adapted to receive a tubular :leeo. collet body having a projectingportion, and torming means :uflapted to coaet therewith .lor shaping the ;ping portion ol? a collet, each of said means constructed to have a plurality of forming sru'tac -zs of different sizes, and means for moving one of said means relatively to the other in a plane transverse to the collet. j

' 2. In a collet forming machine, the combination of collet supporting means adapted to receive a tubular teed collet body having a projecting portion and forming means adapted to coact therewith for shaping the gripping portion of a collet, each of said means constructed to have a plurality of contiguous lengthwise extending forming surfaces oi ditl'erent sizes and lying in ditterent planes, and means for moving one or said means relatively to the other in a plane transverse to the collet.

3. In a collet forming machine, the combination of colletsupporting means adapted to receive a tubular teed collet body having a projecting portion and forming means adapted to coact therewith, each of said means constructed to have a plurality of forming surfaces of different sizes, and in cluding an intermediate tapering portion, and means for moving one ol said means relatively to the other in a plane transverse to the collet. I

at. In a collet forming machine, the combination oi? collet supporting means adapted to receive a teed collet body, and it"orming means adapted to coact therewith, said supporting means and forming means having cooperating forming surfaces of reduced size operative to shape a part of said collet body into a gripping portion, and means for shifting one or said means relatively to the other in a plane transverse to the other.

In a machine of the class described, the combination ot collet supporting means provided with an intermediate tapered portion and adapted to receive a hollow tubular teed collet body having projecting finger pieces, means provided with a corresponding tapered portion and cooperating with said lirst means for shaping said finger pieces into gripping lingers provided with intermediate tapered portions, and means for moving one o't said means relatively to the other to torm each finger with an intermediate tapered portion and a terminal gripping portion.

6. In a machine of the class described, the combination of collet supporting means and radially movable means adapted to receive a teed collet body therebetwcen and having each. a cylindrical portion and a forming portion of reduced size, and means for shifting said movable means to form a part of said collet body into a gripping portion oi reduced. size correspmiding to said forming portion. 7

7. in a machine oi? the class described, the combination of means comprising an arbor tor supporting a collet formingblank, means for shaping the blank against said arbor, means for shifting said means one relatively to the other, and means for shifting said blank.

8. In a collet forming machine the combination of collet supporting means and forming means adapted to receive a feed l. fl O men for mallet bod thrirebetwcen and laying each a relatively large portion and a. forming portion of reduced size, and means to: moving said means one relatively to is other to form a p of said collct body into a gripping portion of reduce; siac corresponding to the reduced 5.: ot' said. tormii'ig portion.

9. In a collct forming machine, the bination oi collet supporting means forming means adapted to receive a feed c-ollet body therebetween and havin" each a tapered portion and a iiiling po'" ion of reduced size, and means tor moving said means one relatively to the other to form a hart oi? said collet body into a tapered portion corresponding to said tapered portion and a part into a gripping portion of reduced size corresponding to the reduced size of said forming portion.

10. in acollet shaping m shine the com bination of collet supporti means comprising an arbor, forming means adapted to co-act therewith for forming the gripping portion of the collet, means for shittin one of said-means toward and i'rom the other, and means for shifting the coliet.

11. In a collet shaping machine, the combination or" collet supporting means, forming means adapted to cooperate therewith and constructed for forming the gripping portion oi? the collet, said supporting means having a shape corresponding to the entire interior shape of said gripping portion and 'means for shifting one of said means toward and from the other.

12. In a collet shaping machine, the combination oi collet supporting means comprising an arbor, forming means adapted to cooperate therewith for forming: the gripping portion oi. the collet, means :ifor iltin one of said means toward from the other, and means for ejecting the collet from said arbor.

13. In a collet shaping machine, the combination of collet supporting means, forming means cooperating therewith for shaping the gripping surface of the collet, and means tor actuating one oi": said means toward and from the other, said actuating means comprising an oscillating cam mechanism.

iii. in a collet shaping machine. the combination oi collet supporting means, forming means cooperating therewith tor shaping the gripping surface of the collet, and

actuating one of said means toward and from the other, sa d actuating means comprising an oi-scillating cam inecha con1- and nisin and said forming means comprising a plurality of shittable jaws movable toward and from said supporting means.

15. In a collet shaping machine the combination of supporting means and a plural ity of cooperating coliet shaping jaws each having a lengthwise extending operating face having different sizes, and means For operating said jaws to form a tubular collet having different diameters, said supporting means constructed to permit movement of the collet thereon.

16. In a collet shaping machine the com bination of supporting means and a plurality of cooperating collet shaping aws each having a lengthwise extending operating face divided into portions of differs s'zes including a tapered portion, and means for operating said jaws to torn'i a tubular collet having diil erent diameters, said supporting means constructed to permit move ment 01 the collet thereon.

17. In a collet torming marhine, a forming arbor adapted to receive a feed collet, forming means momble to and from said arbor, rotary means for moving said forming means at predetermined times toward said arbor, and resilient means for mow ing said forming means away from said arbor.

18. In a collet forming machine, a "torming arbor adapted to receive aiecd collet, a plurality of movable aws, camming means eflfectire at predetermined times to more said jaws toward said arbor, and means for returning said jaws, said cainming means having an oscillatory movement.

10. In a collet forming machine, a torming arbor adapted to receive a feed collet, a phn'ality oil movable segmental jaws, ro

camming means effective predetoward arr termined times to move said jaws said arbor, and resilientmeans for return ing said jaws, said camming means having an oscilla ry movement, and means for oscilia-ting said. camming means.

20. l in a collet forming machine, the comhination of a collet supporting forming arbor adapted to receive teed collet, a plurality or movable finger fori'ning jaws adapted to cooperate ith said arbor, a camming ring having means operative to move said jaws toward said arbor, and means comprising a crank shaft for operating said camming ring.

21. In a collet forming machine, the combination of a collet supporting forming arbor adapted to receive a teed collet, a plurality of mombie tiger forming seg mental jaws adapted to cooperate with said arbor, an oscillatory revolving c aming ring having means operative to more said jaws toward said arbor, and means com prising a crank shaft for revolving and 05* cillating said cam ring.

22. In a collet forming machine, the combination of a c'ollet supporting forming arbor, adapted to receive a feed coll'et, a plurality of finger supporting jaws, slides carrying said jaws, cam'ming means rotatable in one direction to move said slides thereby to close the jaws and rotatable in the opposite direction to release said slides.

23, In a collet forming machine, the combination of supporting means, a forming head carried thereby and a detachable collet supporting core secured to the center thereof, a plurality of radially shiftable finger forming jaws carried'by said forming head, an oscillatory cam carrying ring carried by said head, means for oscillating said ring thereby to shift the jaws toward the core, and means for shifting said jaws away from the core.

24:. In a collet forming machine, the combination of a supporting means, a forming head carried thereby and a detachable core secured to the center thereof, a plurality of radially shift-able jaws carried by said forming head, an oscillatory cam carying ring carried by said head, means for oscillating said ring thereby to shift the jaws toward the core, and means for shifting said jaws away from the core, said ring operating means including clutch control means.

25. In a collet forming machine, the combination of a supporting means, a forming head carried thereby and a detachable core secured to the center thereof, a plurality of radially shiftable jaws carried by said forminghead, an oscillatory cam carrying ring carried by said head, means for oscillating said ring thereby to shift the jaws toward the core,means for shifting said jaws away from the core, said ring operating means including clutch control means, and ejector mechanism including means encircling the core for ejecting the collet.

26. In a collet forming machine, the combination of a collet supporting forming arbor having a plurality of lengthwise extending forming surfaces, a plurality of shiftable segmental jaws, camming means rotatable in one direction thereby to shift said jaws to a closed position and cooperating with said arbor, and rotatable in a reverse direction to release said jaws.

27. In. a collet forming machine, a forming arbor having different diameters and adapted to receive a feed collet, a plurality of shiftable segmental jaws, camming means rotatable in one direction thereby to shift said jaws to a closed position and cooperating with said arbor and rotatable in a reverse direction to release said jaws, means for opening said jaws, and means for ro' tating said camming means.

28. In a collet forming machine, the combination of a collet supporting forming arbor having different lengthwise extending forming faces, a plurality of jaws radially movable relatively to said arbor to and from a closed position and having a plurality of different lengthwise extending forming faces corresponding to the facesof said arbor, camming means rotatable in one direction thereby to move said jaws to a closed position and rotatable in a reverse direction to release said jaws, said jaws in closed position having the forming faces thereof cooperating with the forming faces of said arbor.

29. In a collet forming machine, a forming arbor having different diameters andtatable in a reverse direction to release said jaws, said jaws in closed position. having the segmental faces thereof cooperating with the faces of said arbor, means for opening said jaws, and means for ejecting the feed collet from said arbor.

30. In a collet forming machine, a forming arbor having different diameters and adapted to receive a feed collet, a plurality of jaws radially movable relatively to said arbor-t0 and from a closed position and having a plurality of segmental faces corresponding to the faces of said arbor, cam ming means rotatable in one direction thereby tofmo've said jaws to a closed position and rotatable in a reverse direction to release said jaws, said jaws in closed position having the segmental faces thereof cooperating with the faces of said arbor, means for opening said jaws, and means for ejecting the feed collet from said arbor and comprising an ejector ring shiftable over said arbor.

ill. in a collet forming machine, a forming arbor having different diameters and adapted to receive a feed collet, a plurality of jaws radially movable relatively to said arbor to and from a closed position and having a plurality of segmental faces corresponding to the faces of said arbor, camining means rotatable in one direction thereby to move said we to a closed position and rotatable in a reverse direction to release said jaws, said jaws in closed position having the segmental faces thereof cooperating with. the faces of said arbor, means for opening said jaws, and means for ejecting the feed collet from said arbor and comprisin an ejector ring shiftable over said arbor, an ejector rod, and a knockout lever.

In a collet forming machine, a forming arbor having different diameters and adapted to receive a feed collet, a plurality of jaws radially movable relatively to said arbor to and from closed position and having a plurality of segmental faces corresponding to the faces of said arbor, camniing means rotatable. in one direction thereby to move said jaws'to a closed position and rotatable in a reverse direction to release said jaws, said jaws in closed position having the segmental faces thereof cooperating with the faces of said arbor, means for opening said jaws, means for ejecting the feed collet from said arbor and comprising an ejector ring shift-able over said arbor, an ejector rod, a knock-out lever, and a cam engaging at predetermined times said knock-out lever.

In a collet forming machine, a forming arbor having different diameters and adapted to receive a feed collet, a plurality of awe radially movable relatively to said arbor to and from a closed position and having a plurality of segmental faces corresponding to the faces of said arbor, caniming means rotatable in one direction there by to move said jaws to a closed position and rotatable in a reverse direction to release said jaws, said jaws in closed position having the segmental faces thereof cooperating with the faces of said arbor, means for opening said jaws, means for ejecting the feed collet from said arbor and comprising an ejector ring shiftable over said arbor, an ejector rod, a knock-out lever,- and a cam engaging atpredetermined times said knock-out lever, said knock-out lever having a resilient connection with said ejector rod.

34:. In a collet forming machine, the combination of collet supporting forming arbor adapted to receive a feed collet, a plurality of shiftable segmental jaws radially shiftable relatively to said arbor to and from a closed position, a rotary camming ring having means movable in one direction to shift said jaws to a closed position and movable in the opposite direction to release said jaws, means comprising a rotary shaft for rotating said camming ring, resilient means for opening said jaws, and means for ejecting the feed collet from said arbor.

In a collet forming machine, the combination of collet supporting forming arbor adapted to receive a feed collet, a plurality of shiftable mental jaws radially shiftable relatively to said arbor to and from a closed position, a rotary camming ring having means rotatable in one direction to shift said jaws to a closed position and rotatable in the opposite direction to release said jaws, means comprising a rotary shaft for rotating said camming ring, resilient means for opening said jaws, means for ejecting the feed collet from said arbor and comprising ejector means movable over said arbor, and means controlled by saio shaft for actuating at predetermined times said ejector means.

- 36. In a collet forming machine, a forming arbor adapted to receive a feed collet, a plurality of shiftable segmental jaws radially shiftable relatively to said arbor to and from a closed position, a rotary camming ejector means and comprising a ring having means rotatable in one direction to shift said aws to a closed position and rotatable in the opposite direction to release said jaws, means comprising a rotary shaft for rotating said carmning ring, resilient means for opening said 'aws, means for ejecting thefeed collet from said arbor and com; ising ejector means movable over said arbor, and means controlled by said shaft for actuating at predetermined times said knock-out lever having cushioned connection with said ejector means.

3'2. In a collet shapingmachine, the combination of pair of means movailc one relatively to the other and constructed for w the gripping portion. of feed metal working machi es, one of means comprising-a collet supporting arbor adapted to receive the other comprising one members, and means for moving one of said means relatively to the other.

In a collet shaping machine, the combmation of a pair of means movable one relatively to the other antL constructedfor forming-the gripping portion of a feed collet I01 metal working machines, one of said means con'i n'ising a collet supporting arbor adaoted to receive a feed collet and the other comprising one or more forming members, and means for moving one of said means relativelv to the other and comprisij movable c= -.mming element. I

In a collet shaping machine, the combination of a pair of means movable one relatively to theother for forming the gripping portion of a feed collet for metal working machines, one of said means comprismgn collet supporting arbor adapted to receive a feed collet and the other comprismg one or more forming members, means for moving one of said means relatively to the other and comprising a movable ca1nnnng element, and means for ejecting the collet from said arbor. L

40. In a collet shaping machine, a pair of means movable one relatively to the other for forming the gripping portion of a feed collet for metal. working machines, one of said means comprising an arbor adapted to receive a feed collet and the other compris ing one or more forming members, means for moving one of said means relatively to the other and comprising a movable c amming element, means for ejecting the collet from said arbor, said means comprising an ejector ring, an ejector rod'connected thereto, a knockout lever having a cushioned connection with said ejector rod, and a movable element adapt-ed to engage at predetermined times said knock-out lever.

ll. A machine of the class described comprising collet supporting means adapted to receive a hollow feed collet body having pro a feed collet and or more formmgjecting fin er pieces, finger forming means movable re atively thereto for operating on said. finger pieces and forming gripping fingers terminating in gripplng portions, and means for ejecting the collet from said first means.

42. A machine of the class described comprising collet supporting means adapted. to receive a hollow feed collet body having projecting finger pieces, finger forming means movable relatively thereto for forming therefrom fingers having gripping portions, and means for ejecting the collet from said first means.

43. A machine of the class described comprising means adapted to receive a hollow feed collet body having projecting finger pieces, means movable relatively thereto for shaping said finger pieces into gripping fingers adapted tosuccessively grip the Work, and cushioned means for ejecting the collet from said first means, said ejecting means constructed to permit variable sizes thereof to be used corresponding to the size of said first means.

4A. In acollet shaping machine the combination 01"- means adapted to support a hollow feed collet body having a projecting portion, forming means movable relatively thereto for forming said projecting portion into a gripping portion, means for ejecting the collet from said first means, said ejecting means being constructed to permit variable sizes thereof to be used corresponding to the size of said first means.

Signed at lVindsor, Vermont, this Gth day of December, 1920.

CHARLES J. FANOHER. ROBERT A. JOHNSON.