US1482359A - Bolt machine - Google Patents

Description

M. J. RILEY BOLT MACHINE Jan; 29,1

Filed Aug. 2', 1920 7 Sheets-Sheet 1 M. J. RILEY BOLT MACHINE File d Aug. v2

1920 7 Shgets-Sheet Jan. 29, 1924.

M. .1. RILEY B013 1 MACHINE- 7 Sheets-Sheet 4 Filed Aug. 2

1,482,359 7 M.; J. RILEY BOLT MACHINE Filed Aug. 2, 1920 7 Sheets-Sheet 5 a, x M M 7/ s5 l 47. 54: Q 4 7 782, o 48 a 5/ i V F} /5 I; 73 75 q I r l l I i 63 I j/V l/ l/ I I I 7!, ml I" l 1 67 65 2% 44 i I. Kw

" abbot/nay Jan. 29,1924.

. M. J. RILEY BOLT MACHINE Filed Aug. ,2, 1920 7 Sheets-Sheet 6 Jan. 29, 1924- M. J. RILEY BOLT MAHINE Filei Aug. 2

1920 7 Sheets-Sheet Patented Jan. 29, 1924.

MICHAEL J .RILEY, OF EAST CLEVELAND, OHIO.

BOLT MACHINE.

Application filed August 2,1920. Serial No. 400,705.

machine which will automatically out screwthreads on the shanks of headed blanks fed to it. It also contemplates pointing. the blanks when desirable or necessary.

In general the invention includes a hopper into which the blanks may be thrown promiscuously. The blanks may be assorted and arranged and passed from the hopper to a chute at the end of which they may be received by suitable mechanism for delivering them intoposition to be grasped and held while a cutting device may operate on them. j j

One purpose of the invention to provide means for conveniently retaining the blanks in the chute in association with mechanism for releasing the maintaining means and removing the blanks. f

A purpose is to pass the blanks in a substantially upright position down the chute and deliver them to receiving means which will turn the blanks to a substantially horiz'ontal position so that they may be horizontal when operated on by the cutters.

Another purpose of the invention is to transfer the blanks from the chute into position to be grasped by movable jaws in such a way that the'jaws may grasp either the head or shank of the blank at a predetermined point. i

Another purpose of the invention is to provide the clamping jaws with a relieving mechanism so that a positive drive for the jaws may functionproperly and at the same time compensate forunusual blanks or those irregularly placed.

A further purpose of the invention is to provide means for properly positioning the blanks in the gripping jaws. These means may beadjustable and may move with or be operated by the jaws.

In one aspect the invention includes picker fingers intermediate the chute and the gripping aws to position the blanks to be properly grasped by the jaws. These fingers may be adjustable toward and from each other and they may be adjustable as a unit in the member which upports them. They may be resiliently mounted so as to conveniently grasp and hold blanks of varying sizes and the fingers as a unit may be resiliently mounted so that they may be free to move to allow the blank to be by the jaws.

In another aspect the invention contemplates a spindlecarrying the thread cutproperly grasped ting die head or a bolt pointer head which may be in axial alignment with the blank in the gripping jaws and which may be rotated and reciprocated toward and from the blank. The spindle may be carried in a head which may be adjustable along the bed of the machine toward and from the gripping jaws so as to provide for operation upon blanks of various lengths. The spindle rotating and reciprocating mechanisms may likewise be adjustable and may includela gear and cams all being arran 'ed so that the spindle,

cams and gear may lee adjusted toward or from the blank holder.

Another feature of the invention includes a yielding mechanism in the spindle reciprocating device which may allow the positively driven reciprocating mechanism to operate normally while allowing the thrust of the spindle to be relieved if an emergency requires. This may be associated with a cam for initiating the movement of the thread cutting die head which may allow it to be drawn onto the blank beyond the throw of the cam for the rest of the cutting travel.

A further purpose of the invention is to provide a single driving mechanism which may be geared to rotate the spindle on one hand and on the other hand may drive a cam shaft through gearing including a worm. The cam shaft may carry cams for operating the various elements of the machine including the reciprocatory movements of the spindle, the gripping aws, the picker fingers and the means for receiving the blanks from the chute.

The invention in another aspect contemplates'means which may be operated by the cam shaft to operate cutter releasing mechanism in the cutter head and so limit the amount of thread cut irrespective of the amplitude of the reciprocatory movements of the spindle. Means may also be provided for automatically returning the cutters in the head to cutting position toward the end of the movement by which the cutter head is retracted from the blank.

Other purposes, objects and aspects of the invention will appear from the following description and will be more definitely pointed out in the appended claims.

For the purpose of fully describing the nature and advantages of the invention a specific embodiment thereof will be described as illustrated in the accompanying drawings. It should be understood, however, that the invention is capable of various modifications and, therefore, it is not limited to the particular structure illustrated.

In the accompanying drawings Figure 1 is a plan View of the machine; Fig. 2 is a front elevation; Fig. 3 is an end elevation from the right of Fig. 1; Fig. 4 is an end elevation from the left of Fig. 1; Fig. 5 is a transverse vertical section through the gripping aws for holding the blank; B 1g. 6 is a detail elevation of the device for relieving the jaw movement; Fig. 7 is a transverse vertical section through the same; Fig. 8 is a detail elevation of the device for receiving the blank from the chute and its operating mechanism; Fig. 9 is a fragmentary plan of the end of the chute and the device for receiving the blank therefrom; Fig. 10 is a front elevation of the device for receiving the blank from the chute; Fig. 11 is a side elevation of the cam for operating the device for receiving the blanks from the chute; Fig. 12 is a plan view of said cam; Fig. 13 is a developed view of said cam; Fig. 14 is a transverse vertical section of the machine through the spindle carrying the cutter head; Fig. 15 is a side elevation of the cams for reciprocating the spindle; Fig. 16 is a developed view of one of said cams; Fig. 17 is a transverse vertical section showing the device for opening the cutter head and its cam; Fig. 18 is a vertical section through a part of the mechanism for driving the cam shaft; Fig. 19 is a fragmentary plan view of the device for properly positioning the blanks in the gripping jaws; Fig. 20 is a fragmentary plan view similar to Fig. 19 showing the device in retracted position Fig. 21 is a fragmentary plan view similar to Fig. 19 showing the device in another adjustment; Fig. 22 is an elevation of one form of gripping aws; Fig. 23 is an elevation of another form of gripping jaws; and Fig. 24 is a fragmentary side elevation of the end of the chute and the device for receiving blanks therefrom showing an optional arrangement.

The machine comprises a bed 1 on which is supporteda drive shaft 2 provided with a drive pulley 3. The drive shaft carries a gear 4 which engages a gear 5 on a jack shaft 6. The jack shaft 6 also carries a gear 7 which engages a gear 8 on a second jack shaft 9. At its inner end the jack shaft 9 carries a bevel gear 10 which engages a bevel gear 11 on a transverse shaft 12 which carries a worm 13 engaging a worm gear 14 on a cam shaft 15. This train of gears provides for a reduction ofspeed between the drive shaft and the cam shaft and their relative speeds may be altered by replacing one or more of the gears.

The frame of the machine supports a hopper 16 into which headed blanks may be thrown promiscuously. The hopper 16 is provided with a chopper 17 of a well known form to properly arrange the blanks. A roller 18 is carried by an arm 19 mounted on a transverse. shaft 20 which carries a bevel gear 21 bevel gear 22 on a shaft 23 also carries a sprocket 24 driven by a chain 25 passing over a sprocket 26 on the cam shaft 15. As the arm 19 rotates it causes the roller 18 to wipe the arc shaped bottom 27 of the chopper 17 thereby causing it to rise and fall in the hopper to arrange the blanks in the well known way. A spring 23 on the shaft 23 allows the sprocket 24 to rotate on the shaft to relieve the mechanism should the chopper stick or be locked by misplaced blanks. The blanks are arranged in the chopper so as to hang by their heads and at the upper end of the chopper stroke those so arranged slide by gravity into the chute 28, which, as shown, is provided with a guard 29 to keep the blanks in order.

At its lower or outlet end the chute is provided at each side with a lock 30, which may be forked, pivoted at 31 on the chute side and forced by a spring 32 into the mouth of the chute so as to prevent blanks from dropping out. (See Fig. 9.) The outer sidesof the locks are beveled toward their meeting point and each lock is provided with a set screw 33.

A transverse shaft 34 carried in bearings 35 on the bed of the machine carries at one end a transfer carrier arm 36. At its other end the shaft 34 carries a pinion 37 which is engaged by a toothed are 38 on one end of an arm 39 pivoted on the bed at 40. At its other end the arm 39 carries a roller 41 adapted to be engaged by a cam 42 mounted on the cam shaft 15. The cam 42 is shown in detail in Figs. 11, 12 and 13. A. spring 43 mounted on the bed of the machine bears against the arm 39 and tends to hold the apparatus in position to cause the transfer arm 36 to be in a horizontal position. A stop 34 adjustable on the shaft 34 engages a web 35 in the bed and limits the movement of the transfer carrier arm 36 as caused by the spring 43 to such as will cause the arm 36 to be substantially horizontal. As its rotates the cam 42 engages the roller 41 so as to cause the toothed arc 38 to rotate the pinion 37 and swing the transfer engaging a which carrier arm 36 through about 60 upward from the horizontal to the outlet of the chute 28. The face of the transfer carrier 'arm- 36 is beveled as at 45 sothat as it approaches the locks the bevels engage the set screws 33 inthe locks 30 and so force them to separate againstthe pressure of the springs 32. The set screws 33 may be adjusted to accommodate the transfer carrier arm and'properly cooperate therewith and so as to cause the faces 45 leave the set screws 33.

'A longitudinal shaft 47 mounted in the bed of the machine carries a rearwardlyextending arm'48 on which is a roller 49 en- V gaged by a cam 50 on the cam shaft 15. The

shaft 47 alsocarries a forwardly extending arm 51 provided at its forward end with a fork 52 in which is a transverse pin 53. A coil spring 51 fastened to the bed land the arm 51 tends to hold the forward end of the arin substantially horizontal and also holds the roller 49 against the edge of the cam 50.

Pivoted on thepin 53 are jaws 54 and 55 acting as pickerfingers for the blank. At their tips the jaws orfingers 54 and 55 may be forked as shown in Fig. 2. The jaw 55 carries a set screw 56 by which the distance between the jawsmay be regulated. A lug 57 depending from the fork 52 carries a set screw 58 which adjusts the position of the jaw 54 and consequently of the picker fingers as a unit with relation to the arm 51. EX- tending upwardly and beyond the pivot pin 53 the jaws 54 and 55 have ends provided with holes through which passes a rod 59 projecting from a lug 60 extending upwardly from the fork 52. Surrounding the rod 59 and between the ends of the jaws 54 and 55 is a coil spring 61 tending to force together the lower ends of the jaws as allowed by .the set screw 56. A coil spring 62 surrounds the rod 59 between the lug 60 and the jaw 54 and tends to hold the jaws as a unit against the setscrew 58. The picker fingers thus are normally held in fixed positions but they are heldresiliently and capable of suiting themselves either separately and individually or as a unit to the pieces and parts with which they co-act or engage.

The transfer carrier arm 36 swings in a plane which is a continuation of the plane of the chute 28 and the arm 51is so mounted and operated that it may extend the gripper fingers into the same plane. The transfer carrier arm receives the blanks in a substan tially upright position and moves them to a substantially horizontal position. The cam 50 is so formed and timed as to cause the picker fingers made up of the jaws 54 and 55 to descend upon and grasp the blank in the horizontal transfercarrier arm 36. The springs 61 and 62 give sufiiciently to allow the fingers 54 and 55 or their forked tips to separate and enter the openings through the bevels 45 and the sides of the cavity 46 in the carrier arm 361 SeeFigs. 8 and 9. The picker fingers now may grasp the blank and remove. it from the carrier 36 as the cam 50 causes the arm 51 to rise. The picker fingers rise to allow the transfer carrier arm 36 to movepastthem toward its upright position and then the picker fingers move back and further downward past" their former position so as to bring theblank about on the level with a stationary gripping jaw 63. The blank is maintained substantially horizontal so long as it is held. by the picker fingers.

Associated with the stationary jaw 63 is the movable gripping jaw 64 carried by a block 65 sliding in transverse ways in the bed ofthe machine. In the same ways and beyond the block 65 is a second block66. The

block 65 is beveled at its rear end 65 and is provided with a cavity 67 into which telescopes an overlying tongue 68 extending from the block 66 the adjacent face of which is also beveled at 66 and provided with a cavity 67 into which telescopes an underlying tongue 68 extending from the beveled face 65 of the block 65. Between the beveled faces of the two blocks 65 and 66 and carried by the tongue 68is an upwardly extending bolt 69 provided at its upper end with a nut 70 holding in place a washer 71 below which and surrounding the bolt 69 is a coil spring 72 which acts upon and normally forces downwardlya forked beveled wedge 73 mounted loosely on the bolt 69. The beveled forks of the wedge 73 straddle the tongues 68 and 68 and engage the beveled faces 65 and 66 of the blocks 65 and 66. (See Figs. 6 and 7.) At its other end the'block 66 is forked and carries a transverse horizontal pin 74 on which is mounted a roller 75 within the fork which engages a cam 7 6 on the cam shaft 15 which as it turns normally forces'the block 66 and the block 65 which act as aunit because of the intermediate wedge 73 in the direction to cause the movable jaw 64 carried by the block 65 toward the stationary jaw 63 to grasp and hold the blank which has been brought to approximately the proper position by the picker fingers 54 and 55. The springs Gland 62 at this time allow some freedom of movement of thepicker fingers 54 and 55 to allow the blank to'be properly and surely seated in the jaws 63 and 64 so as to be securely award and p o er held y them- The 5. the lley the arm 5, to i ying with the picker fingers and which because of their resilient mounting are readily pulled from the blank which is now rigidly held between the jaws 63 and 64:. An exgtension of the pin (74 in the block 66 carries asecond roller 77 which is engaged by a cam 78 on the cam shaft 15 in such a way that when the cam 78 acts on the roller 77 it retracts the'movable jaw 64} to release the blank. if the blank is not properly positioned between the jaws 63 and 64 or it it is a defective blank or larger thanthe particular jaws are set for or in any emergency the tapered wedge 73,1nay rise against the pressure of the spring 72 and allow the blocks 65 and 66 to telescope and avoid damage to the machine or any of its parts. As shown in Fig. 5 thebolt- 69 extends through the tongue 68 and into a cavity 69 in the tpngue 68 of the block allows a limited freedom of movement but ensures the bolt 69 engaging the wall of the cavity (39 to retract the jaw 04. when the cam 78 retracts the block 66.

The blocks .65 and 66 are held in their ways by caps 7 9 held on the bed of the ma: chine by bolts. :One of these bolts 80 may be extended to support a vertical roller 81 above the cap 79. A vertical pivot pin 82 on the movable jaw 6 L supports an angle lever onearm 83 of which engages the roller 82 as the movable jaw 6 is retracted from the stationary jaw (53. (See Fig. 20.) This causes the other arm 84L ot the angle lever to be moved away from the gripping face of the jaws. This arm 84 carries a transverse threaded plug 85 into which is threaded a bolt 86 provided with a locking nut 87, The extreme end of the arm St is beveled at 88 to correspond with a beveled lug .89 held rigid on the stationary jaw 63. ,dhen the movable jaw approaches the stationary jaw (33 the beveled end SS'engages the beveled lug 89 and causes the bolt St; to approach the gripping taceo'f the jaws. (ties l ig. 19.) The blank is normally placed and held by the fingers 54 and so that its head is just withinthe protruding faces or shoulders of the jaws (33 and 6 1 and so that the shank of the blank will be grasped by the jaws immediately under the head. The bolt 86 may be properly adjusted in the arm 84: and in the plug 85 so that in its final position it will engage the head of the blank and force it snugly against the shoulder of the gripping face of the jaws as shown in Fig. 19; As illustrated in Fig. 24 the "lower end of the chute 28 may be cut away or beveled and a shorter transter carrier arm 36 employed so as to positionthe blanks in the picker fingers 54 and 55 so that the blanks will be placed adjacent the gripping jaws 63 and 64 in such a way which are trunnion blocks 95?.

that the bla k. heads wil e g ppe by the jawsand the entire shank protrude there: from. By suitably adjusting the bolt 86 it may ensure a positioning of the blank to be gripped by the head so that the entire shank of the blank may be free of the gripping jaws as indicated in Fig. 21. In this event the more or less circular opening in the gripping jaws adapted to the round shanks as illustrated in Fig. 22 may be replaced by gripping jaws provided with a suitably formed rectangular opening illustrated in Fig. 23 and varying with the shape of the blank head. For operating on step bolt blanks angularly formed gripping aWs may be employed to grasp the square of the shank.

The drive shaft 2 carries a long gear 90 which slidably engages a gear 91 on a re.- ciprocating spindle 92 carried in an adjustable head'93" resting on the bed of the machine. Adjacent thegear91 and surrounding the spindle is a coil spring 94: against which rests a collar 95 floating on the spindle, so that motion may be transmitted through the spring from the collar 95 to the gear 91 and to the spindle 92. The collar is provided with trunnion pins 95" on The trunnion blocks 95? slide in ways 96 in a yoke lever 96 on a shaft 97 which is mounted in transverse hearings in the head 93. An arm 98 extending rearwardly from the yoke 96 carries a roller 99 which may be engaged by a face cam 100 mounted on a drum 101 on the cam shaft 15'. The cam 100 as it rotates forces the collar 95 as carried by the yoke 96 against the spring 94 in such a way as to reciprocate the spindle toward the blank gripping jaws 63 and 6d. The roller 99 is later engaged by a cam 102'also carried by the drum 101 to force the collar 95 against a collar 102 adjustable on the spindle 92 to positively retract the spindle. The trunnion collar 95 floats on the spindle between the spring 94 and the adjustable collar 102. The cams 100 and 1.02 are shown in detail in Fig. 15 and the cam 100 is shown developed in Fig. 16.

The spindle carries at its end a cutter head 103 of any suitable well known type for cutting threads upon the blanks or for pointing bolts. In Fig. 21 is shown diagrammatically a bolt pointer head. The type illustrated in Figs. 1, 2 and 17 is a thread cutting die head 103 having a rear collar 104: pressure upon which will lock the cutters in their cutting position as is well known in the art. On a. pin 105 (see Fig. 2) extending from the head and parallel with the spindle floats a yoke 106 which partially surrounds the spindle 92 just to the rear of the collar 104. A stop collar 107 adjusted on the pin 105 so as to limit the float of the yoke 106. As the spindle is reciprocated by the cam. 102 it carries with it the yoke 106 which engages the stop 10'? and puts upon the collar 104 suflic ient pressure to close the cutters in the thread cutting die head so that when the spindle in its return movementis pushed toward the blank the cutting head will operate on the blank.

The shaft 97 carries an arm 97 adjustable along which is a weight 97 The tendency of the weight is to force the arm 96 so as to keep the collar 95 against the stop collar 102 on the spindle 92. This tends to keep the roller 99 snugly against the cam 100. When the thread cutting operation is completed and the roller 99 rides off the cam 100 the weight 97 tends to retract the spindle from the blank but the action may not be sure and strong enough to cause the yoke 106 to close the cutters in the thread cutting die' head 103 and, therefore, the cam 102 may be employed to give a final and positive retractive movement to the cutter head and so cause the cutters to close preparatory to the next forward movement caused by the cam 100.

The thread cutting die head illustrated is the cutters within the head.

from its side, pressure upon which will open (See Fig. 17.) A trip 109 is carried by a transverse block 110 resting in ways in the bed of the machine. The block'110 at its rear end carries a roller 111 which, asillustrated in Fig. 17, maybe engagedby a cam 112 mounted on 4 the cam shaft 15. Thestop is normally held retracted by a spring 119 in a pocket in the bed 1 and engaging a lug 119 depending from the block 110. As the cam shaft rotates it forces the cam 112 against the roller 111 and thus forces the stop 109 against the force of the spring119 intoposition to be engaged by the lug 108 as the head rotates to open the cutters in the thread cutting' die head. As shown in Fig. 1 the trip 109 is long enough to operate on the lug 108 throughout its entire reciprocating movement so that it can open the cutterswhenever forced forward by the cam 112. The cam 112 may be adjusted, to operate at any -point in the stroke. By 0 ening the'thread cutting die head the thread cutting operation is discontinued and the amount of threads out is limited irrespective of further reciprocation of the cutter head toward the blank holding jaws. This also facilitates removal of the cutter head from the threaded blank.

When the cutting head 103 isa bolt pointer the Stop 109 and its operating mechanism as well as the yoke106 may be omitted'or remain inoperative.

The jaws 63 and 64 hold the blank in axial alignment with the spindle 92 so that as the spindle reciprocates it causes the cut- .ter head 103 to engage the shank of the blank and point it or cut threads thereon.

Any pitch'of thread may be accommodated snugly against the gripping jaws to aid in measuring with accuracy the amount of thread to be out. When, however, it is desired to out thread throughout the entire length of the shank of the blank it may be gripped by' the head as shown in Fig. 21 and thus the entire'shank may be exposed to the operation of the thread cutting die head 108. i

If the blank is not properly held to be engaged by the cutter head or if it is of unusual size or defective or any other contingency arise the spring 94 may contract and save the cutter head from damage without interfering with the operation of the cams 100 and 102 and without stoppingthe movement of the collar 104. The amplitude of the throw of the lever arm 96 may be less than the contraction of the spring 94 so that in emergencies the entire throw of the lever may be absorbed by compression of the spring 94 and the cutter head remain unmoved.

The spindle head 93 may be adjusted along the bed of the machine toward and from the holding jaws 63 and 64 to provide for operation upon blanks of different lengths. A hand wheel 113 operating a gear 114 engaging a rack 115 in a well known way provides for movement of the spindle head. Theusual bolts 116 are provided for holding the head in any of its adj ustments. The gear 90 may be held on the driving shaft by a set screw 117 so that it may be adjusted along the driving shaft as the spindle head 93 is adjusted and thus the spindle may be rotated in whatever position the spindle head may be. Likewise the drum 101 carrying the cams for operating the spindle may be adjusted along the cam shaft 15 and held by a set screw 118 so that the spindle may be properly reciprocated in any adjusted position the head 93 may take.

The spring 94 is stiff so that normally continue forming threads thereon until the cutters are retracted or opened by the operaup by the chopper 17 and delivered to the chute 28. The blank will slide by gravity against the locks 30 until the transfer carrier arm 36 approaches the chute and opens the looks 30 when the blank by its own weight will slide into the cavity 46 in the :carrier. The arm 36 then moves through substantially 60 so as to turn the blank from a substantially upright position to a substantially horizontal position in which position it is picked up by the picker fingers 54c and 55. The blank is then raised to allow the arm 36 to escape and then lowered to afposition adjacent the stationary gripper jaw 63 where it remains while the movable jaw64 advances and grasps and holds the blank. While being gripped the blank is properly positioned by the bolt 86. The fingers 54 and 55 are now withdrawn from the blank. While the blank is held in the jaws 63 and 64 the spindle advances and causes the cutter head 103 to act on the blank either to point it or to cut threads on it. Thestop 109 may then advance and open the cutter head, the spindle will be retracted and the movable jaw 64 will recede to release the blank which will fall out of the machine and make place for another blank.

I claim as my invention:

1. In a bolt threading machine, a drive shaft, a cam shaft driven thereby, a hopper for receiving bolt blanks, a chopper for a'rranging the blanks, a chute leading the blanks from the hopper, resilient looks at the outlet of the chute, a transfer arm openmg the locks and releasing a single blank and receiving the released blank, means for causing the transfer arm to remove the blanks from the chute outlet, means for removing the blank from the transfer arm and placing it in position to be held, a pair of jaws for holding the blank, means for operating the jaws to grasp and release the blank, a spindle rotated from the drive shaft, a cutting head on the spindle, means for retracting the cutting head .from the blank, means for closing the cut-ting head during its retracting movement, means for reciprocating the spindle to cause the cutting head to operate on the blank, means for opening the cutting head after it has cut threads on the blank, means for actuating the opening means, and cams on the cam shaft for operating the transfer arm, the removing means, the j awoperating means, the cutting head opening actuating means and the spindle reciprocating means.

2. In bolt threading machine, a drive shaft, a cam shaft driven thereby, a hopper for receiving bolt blanks, a chute leading the blanks from the hopper, a look at the the blank, means for operating the jaws to grasp and release the blank, a spindle rotated from the drive shaft, a cutting head on the spindle, means for retracting the cutting head from the blank, means for closmg the cutting head during its retracting movement, means for opening the cutting head after it has cut threads on the blank, means for actuating the opening means, and cams on the shaft for operating the transfer arm, the removing means, the jaw operating means, the cutting head opening actuating means and for reciprocating the spindle to cut threads on the blank.

3. In a bolt threading machine, a drive shaft, a camshaft driven thereby, a hopper for receiving bolt blanks, a chute leading the blanks from the hopper, a look at the outlet of the chute, a transfer arm opening the locks and releasing a single blank and receiving the released blank from the chute, means for causing the transfer arm to remove the blank from the chute outlet, a pair of jaws for grasping and holding the blank, means for operating the jaws to grasp and release the blank, a spindle rotated from the drive shaft, a cutting head on the spindle, means for-retracting the cutting head from the blank. means for closing the cutting head during its retracting movement, means for opening the cutting head after it has cut threads on the blank, means for actuating the opening means, and cams on the cam shaft for operating the transfer arm, the removing means, the jaw operating means, the cutting head opening actuating means and for reciprocating the spindle.

el. In a bolt threading machine, a drive shaft, a cam shaft driven thereby, a hopper for receiving bolt blanks, a chute leading the blanks from the hopper, a look at the outlet of the chute a transfer arm opening the locks and releasing a single blank, and receiving the released blank, means for causing the transfer arm to remove the blank from the chute outlet, 21- pair of jaws for holding the blank, means for operating the jaws to grasp and release the blank, a spindle rotated from the driveshaft, a cutting head on the spindle, means for reciprocatin the spindle from the blank,means for c OSiIlg the cutting head during its retracting movement, means for opening the cutting head after it has cut threads on the blank, and means for actuating the opening means. l j

5. Means for holding a blank comprising a stationary jaw member, a movable jaw member, a block reciprocating in guide ways and carrying the movable jaw member at one end, a beveled surface at the other end of the block, a tapered wedge engaging the beveled surface, a second block having-a beveled surface engaging the tapered wedge, a spring carried by the second block pressing the wedge between the blocks, a roller on the second block, anda cam engaging the roller to normally cause the blocks to reciprocate to operate the jaws. j j

6. Means for holding a blank comprising a tationary jaw member, a movable jaw member, a blockreciprocating in guide ways and carrying the movable jaw member at one end, asecond block, a tapered wedge, a spring carried by the second block pressing the wedge between the blocks, and means engaging the second block to cause the blocks to reciprocate to operate the jaws.

. Means for holding a blank comprising a stationary jaw member, a movable jaw member, a block reciprocating in guide ways and carrying the movable jaw member atone end, a beveled surface at the other end of the block, a tapered wedge engagingthe beveled surface, a second block having a beveled surface engaging the tapered wedge, a spring carried by the second block pressing the wedge between the blocks, and means engaging the second block to operate the aws.

8. Means for holding a blank comprising a jaw member, a second jaw member movable relatively thereto, a block carrying the movable jaw member, a second block, a tapered wedge between and engaging both blocks, a

i spring carried by the second block pressing the wedge between the: blocks, a roller on the second block, and a cam engaging the roller to normally cause the blocks to reciprocate to operate the jaws.

9. Means for holding a blank comprising a stationary aw member, a movable aw member, an arm pivotally mounted on the movable j aw member, an aligning block carried by the arm, a block on the stationary jaw member engaging the arm when the jaws close, and a stationary roller engaging the arm. when the jaws open, I

10. Means for holding a blank comprising a stationary jaw member, a movable jaw member, an arm pivotally mounted on the movable jaw member, an adjustable aligning block carried by the arm, a block on the stationary jaw member engaging the arm when the jaws close, and a stationary roller engaging the arm when the jaws open.

11. Means for holdin a blank comprising .a stationary jaw memIJer, a movable jaw member, an arm pivotally mounted on the movable jaw member and having one end beveled, an aligning block carried by the arm, a beveled block on the stationary jaw member engagingthe arm when the jaws close, and a stationary roller on the machine engaging the arm when the jaws open.

12. Means for holding a blank comprising a stationary jaw member, a movable jaw member, an angle lever pivotally' mounted on the movable jaw member, an aligning block carried by one arm of the lever, a block on the stationary jaw member engaging the said arm when the jaws close, and a stationary roller on the machine engaging the other arm of the angle lever when the jaws open.

13. In a machine of the character described, the combination with a movable griping jaw, of means carried by the jaw but movable. with respect thereto for aligning headed blanks therein comprising a finger for positively holding the heads against the jaws.

14. In combination, a movable griping jaw, a finger carried by the jaw for aligning blanks therein, means for moving the jaw and finger, and means for moving the finger with respect to the jaw.

15. In a machine of the character described, a blank supporting track, a resilient look at the delivery end of the track, a carrier movable from a substantially horizontal to a substantially vertical position and vice versa toward and from the delivery end of the track, means on the carrier to open the lock, reciprocatory fingers, and mechanism for moving the fingers to and from, and then down past the carrier.

16. In a machine of the character described, a blank supporting track, a resilient lock at the delivery end of the track, a carrier movable from a substantially horizontal to a substantially vertical position and vice versa toward and from the delivery end of the track, and means on the carrier to open the lock.

17. In a machine of the character described, a blank supporting track, a resilient lock at the delivery end of the track, a carrier movable from a substantially horizontal to a substantially vertical position and vice versa toward and from the delivery end of the track, means on the carrier to open the lock, resiliently mounted reciprocatory fingers, and mechanism for moving the fingers to and from, and then down past the carrier.

18. In a blank feeding mechanism including a runway for blanks, a resilient look at the delivery end of the runway, a carrier movably mounted to receive blanks delivered by natural forces thereto in a substantially up right position from said runway and to carry them to a substantially horizontal posit-i'oiig a'nd means for lifting said blanks from said carrier and for bbdily conveying them to a position to be gi'asped and held.

delivered by natural forces thereto in a subll) stantially upright position from said run- Way and to carry theni to a substantially horizontal position.

20. In a blank feeding mechanism includ mg a runway for blanks, a resilient look at the delivery end of the runivay, a carrier movably mounted to receive blanks delivered by natural forces thereto in a substantially upright position from said runway and to.

carry them to a substantially horizontal 2U position, means carried by said carrier to open said lock, and means for lifting said blanks from said carrier and for bodily conveying them to aposition to be grasped and held.

21. In a blank feeding mechanism including a runway for blanks, a resilient look at the delivery end of the runway, a carrier movably mounted to receive blanks delivered by natural forces thereto in a substantially upright position from said runway and to carry them to a substantially horizontal position, and means carried by said carrier to open said lock. I

22. Mean for operating movable cutter heads including a longitudinally moving spindle, a cutter head thereon, a transversely moving stop, means to move the stop toward thespindle at apredetermined point in the spindle movement, and means on the cutter head engaged by the stop to open the cutter head. j I j 23. Means for o eratin movable cutter heads including alongitudinally moving spindle, a cutter head thereon, means adjacent the spindle to close the cutter head, a transversely moving stop, and means on the cutter head engaged by the stop to open the cutter head.

2-1. Means for operating movable cutter heads including a longitudinally moving spindle, a cutter head thereon, a transversely moving stop, and means on the cutter head engaged by the stop to open the cutter head at a predetermined point in its movement.

25. Means for operating movable cutter heads including a longitudinally moving spindle, a cutter head thereon, means to close the cutter head toward the end of its nove: ment in one direction, a transversely moving stop, and means on the cutter head engaged by the stop to open the cutter head toward the end of its movement in theother direconi 26. Means for operating movable cutter heads including a longitudinally moving cutter head, a stationary shaft, a stop on the shaft, and a yoke floating en the shaft and eziteiiding into the path o'fthe head and adapted to close the cutter headivhen the yoke engages the stop. 1

27. An adjustable head stock, a. longitudinally moving cutter head in the head stock,

a stationary haft in the head stock, a stop on the shaft, and a yokefloating on the shaft and extending. into the path of the cutter head and adapted to close the cutter head when the yoke engages the stop.

28. Means for operating movable cutter heads including a longitudinally moving spindle, a cutter head thereon, a transversely moving stop, means on the cutter head enby the stop to open the cutter head, a stationary shaft, a stop on the shaft, and a yoke floating on the shaft and extending into the path of the cutter head and adapted to close the cutter head Whenthe yoke engages the last mentioned stop.

29. Means for operating mevable cutter heads including a cutter head movable toward and away from a blank, a stationary shaft, :1 stopon the shaft, and a yoke floating on the shaft and extending into the path of the head and adapted to close the cutter head when the yoke engages the stop in its travel aivay from the blank. I j j 30. Blank handling and transferring mechanism comprising an arm a fork at one ehd thereof, a pair of pick up fingers pivoted together in the forkintermediate their ends, a set screiv in one finger bearing against the other finger betiven the pivot and the griping end of the fingers, a set screw in the fork and bearing against the adjacent finger, a guide rfdd extending from the fork through thenon-griping ends of the fingers, a spring on the rod between the fingers. a spring on the rod between the fork and the adjacent finger, and means for swinging the arm to move the fingers through an arc. A, 31 Blank handling and transferring mechanism comprising an arm, a fork at one end thereof, a pair of ick up fingers pivoted together in the fork intermediate their ends, a guide rod extending from the fork through the non-griping ends of the fingers, a spring on the rod between the fingers, a spring on the rod between the fork and the adjacent finger, and means for swinging the arm to move the fingers through an are. I

32. Blank handling and transferring mechanism comprising an arin, a pair of pick up fingers pivoted tog'ether on the arm intermediate their ends, a set screiv in one finger bearing against the other finger between the pivot and the griping end of the fingers a set screw on the arm and bearing against the adjacent finger, and resilient means for forcing the griping ends of the fingers toward each other.

33. Blank handling and transferring rod between the arm and the adjacent finger,

and means for swinging the arm to move the fingers through an arc.

34. Blank handling and transferring mechanism comprising an arm, a pair of pick up fingers resiliently pivoted together on the arm intermediate their ends, a set screw in one finger bearing against the other finger between the pivot and the griping end of the fingers, and a set screw onthe arm and bearing against the adjacent finger.

35. Blank handling and transferring mechanism comprising an arm, a pair of pick up fingers pivoted together on the arm intermediate their ends, a guide rod extending from the arm through the ,nongriping ends of the fingers, a spring on the rod between the fingers, a spring on the rod be tween the arm and the adjacent finger, and means for swinging the arm to move the fin gers through an arc.

36. An arm, pick up fingers pivotedrtogether on the arm, resilient means for holding the fingers in position on the arm, and resilient means for holding the fingers in position with relation to each other.

37. Blank handling mechanism comprising a hopper for blanks, an arm for receiving blanks from the hopper inclined 30 tothe" perpendicular, a shaft carryingthe arm, a pinion on the shaft, anarc arm pivoted intermediate its ends, a toothed are on one end of the arc arm engaging the pinion,

a camshaft, and a cam on the shaft to cause the receiving arm to travel 60 to a horizontal position and vice versa.

38. Blank handlingmechanism comprising a hopperfor blanks, an arm forreceiving blanks from'the hopper inclined 30 to the perpendicular, a shaft carrying the arm, a pinion on. the shaft, an arc arm pivoted intermediate its ends, a toothed are on one end of the arc arm engaging the pinion, a cam shaft, a cam on the cam shaft to cause the receiving arm to travel 60 to a horizontal position and vice versa, and-picker fingers to remove the horizontal blank from the receivingarm and place it in position to be held horizontally.

39. Blankhandling mechanism comprising a hopper for blanks, an arm for receiving blanks from the hopper inclined 30 to the perpendicular, a shaft carrying the arm, a pinion on the shaft, a pivoted arc" arm, a toothed are on the arc arm engaging the pinion, a cam to cause the receiving-"arm to travel 60 to a horizontal position and vice versa. 7 40. Blank-handling mechanism compris- 1ng a hopper foryblanks,an arm for re- :ceiving blanks from the hopper inclined 30 to the perpendicular, a shaft carrying the arm, a pinion on the shaft, a, pivoted arc arm, a toothed are on the arc arm engaging the pinion, a cam to cause the receiving arm to travel 60 to a horizontal position and vice versa, and picker fingers to remove the, horizontal blank from the receiving arm and held horizontally.

41. Blank handling mechanism comprising a hopper for blanks, an arm for receiving blanks from the hopper in a substantially perpendicular position, a shaft carrying the arm, a pinion on the shaft, an

arc'arm,a toothed are on the arc arm engaging the pinion,-ai cam to cause the receiving arm to travel to a substantially horizontal position and vice versa.

42. Blank handling mechanism comprising-a hopper for blanks, an arm for receiving blanks from the, hopper in a substantially perpendicular position, a shaft carrying the arm, a pinion on the shaft, an

arc arm, a toothed are on the arc arm engaging the pinion, a cam to cause the recelving arm to travel to a substantially horizontal position and vice versa, and picker fingers to remove the horizontal blank from the receivingarm and place it in position to be held horizontally.

43. Blank handling mechanism comprising a hopper for blanks, an arm for re ceiving blanks from the hopper inclined 30 to the perpendicular, a shaft carrying the arm, and a cam to cause the receiving arm'to-travel 60 to a horizontal position and vice versa.

44. Blank handling mechanism comprising a hopper for blanks,-an arm for receiving blanks from the hopper inclined 30 to the perpendicular, a shaft carrying the arm, a cam to cause the receiving arm to travel 60 to a horizontal position and vice versa, picker fingers for removing the horizontal blank from the receiving arm, and iping jaws for griping the blank while held by the fingers and holding it horizontal. a

45. Bolt threading mechanism comprising a bed, a blank holder stationary on the bed, a head adjustabletoward and from the blank holder, a spindle in the head, a cutting head on the spindle, a gear on the spindle, a drive shaft on the bed, a gear adjustable along the drive shaft to engage the gear on the spindle and rotate the spindle, a cam shaft on the bed and driven from the drive shaft, means carried by the adjustable head to reciprocate the spindle in the place it in position to be head toward. and from the blank holder, and a cam adjustable on the=cam shaftto operate the spindle reciprocating means.

46. Bolt threading mechanism comprising a bed, a'blank holder stationary on the bed, a head adjustableitoward and from the blank holder, aspin'dle in the head, a cutting head on the spindle, a gear-on the spindle, a'drive shaft on the bed, a gear adjustable along the drive shaft to engage the gear on the spindle and rotate the spindle,- a cam shaft on the bed'and driven from the drive shaft,- means carried by the adjust-- able head to reciprocate the. spindle in thei head'toward and fromtheblank holder, a cam adjustableon the cam shaft to operate" the spindle reciprocating means, and means to hold the adjustable-parts'intheir acb justed positions.

47. Bolt threading mechanism co'mpris ing=a bed, a blank holder stationary on the bed, a head adjustable toward and from the" blank holder, a spindle in the head, a cut-" ting head on the spindle, a gear on the-spindle, a drive shaft on the bed, a gear adjustable alongthe drive shaft as the head is adjusted and arranged to slidably engage the gear on the-spindle and rotate the spindle, a'cam' shaft on thebed and driven from the drive'shaft, means carried by the adjustable head to reciprocate thespindle-in the head toward and from the blank holder, and a cam adjustableon the cam shaft as' the headis ad'justedand arranged t0 operate the spindle reciprocating means.

48. Bolt threading mechan'i'sm comprising a bed, a blank holder stationaryonthe bedg a head adjustable toward and from theblank holder, a spindle in the head, a cutting-head on-the spindle, a vear'on the spindle,' a' drive shaft on the bect -a gear'adjustablealon the drive shaft as the head is adjusted an i arranged to"slidalblyengage' the gear on-the spindle and rotatethe spindle, a oam shaft on the bed anddriven from the drive shaft; means carried'by the adjustabl'e head to reciprocate the spindle in the head'towardand from the blank holder, a cam adjustable on the cam shaft as thehead is' -adjust'ed and arranged to operate thespindle' reciproc'ating means, andmeans to hold-'the' adjust able parts intheir adjusted positionsn 49. Bolt threading mechanism comprisin a bed,a blank holder stationary onthe bet, a head 4 adjustable toward Y and from the blank holder, a spindle in theheadfa cutting headon the spindle, age'ar on the spin dle, a drive shaft on the bed, a gear adjustable along the drive shaft to engage the gear on the spindlethroughout its recipro cation'and rotate thespindle', acam shaft on'the bedand driven from the drive shaft, means" carried by Y the adjustable P head to reciprocate the 'spindle in' the head toward and from the blank holder, and a cam adjustable on the cam shaft to operate the spindle; reciprocating means.

50. Bolt threading mechanism comprising a bed, a blank holder stationary on the bed, a head adjustable toward and from the blank holder, a spindle in the head, a cuttinghead on the spindle, a gear on the spindle, a drive shaft on the bed, a gear adjustable along the drive shaft to engage the gear on the spindle throughout its reciprocation and rotate the spindle, a cam shaft on the bed and driven from the drive shaft, means carried'by the adjustable head to reciprocate the spindle in the head toward and from the-blank-holder, a cam adjustable on the cam shaft to operate the spindlereciprocating means, and means'to hold the adjustable parts in theiradjusted positions:

51. Bolt threading mechanism comprising a 'bed, ablank holder stationary on the bed, a I head adjustable toward and from the blank holder, a spindle in the head, a cuttinghead on the spindle, a gear on the spindle, a drive shaft'on the bed, a gear adjustable along-the drive shaft to engage the gear on'the spindle and rotate the spindle, and means carried by the adjustable head to reciprocate the spindle in the head toward and fromthe blank holder;

52; Bolt threading mechanism comprising a bed, a blank holder stationary on the bed, a head adjustable toward and from the blank holder, a spindle in the head, a cuttinglhead on thcspindle, a gear onthe spindle, a drive shaft on the bed, a gear adju'stable along the drive'shaft to engage the gear on the spindle and rotate the spindle, means carried by the adjustable head to reciprocate the spindle inthe head toward andfrom the blank holder, and means to positions;

53. Feeding mechanism for bolt threadingim'achines comprisinga spindle, an arm for reciprocating the spindle having" a yielding vcontact with the spindle in one direct-ion'and a solid contact-inthe other direction, and a weighted arm tending to throw the reciprocating varm against the solid contact;

54. Feedingwmechanism for bolt threading machines comprising a spindle, a spring thereon, a fixed collar on the spindle, a floating collar between the spring and collar, an arm for moving the floating collar to reciprocate the spindle, andaweight tending to keepthe arm in position'to force the float ing collar against the fixed collar.

55. Feeding mechanism for bolt threading-machines comprising aspindle,a thread cutting die head on the spindle, a removable cam-to reciprocate the spindle to cut threads hold'the adjustable' parts in-their adjusted Lil on a blank so arranged that a variation in the cam may change the pitch of the thread cut on the blank.

56. Feeding mechanism for bolt threading machines comprising a blank holder, a reciprocating spindle, a lever for reciprocating the spindle, and a compression spring between the lever and spindle having suflicient compression to take up the entire throw of the lever.

57. Feeding mechanism for bolt threading machines comprising a spindle, a spring surrounding the spindle, a trunnion collar loose on the spindle and engaging the spring, trunnion pins on the collar, trunnion blocks on the pins, a pivoted lever arm, ways on the lever arm in which the trunnion blocks slide, and means for swinging the lever arm to reciprocate the spindle through the spring.

58. Feeding mechanism for bolt threading machines comprising a spindle, a thread cutting die head on the spindle, a cam shaft, cams thereon, mechanism operated by the cams to reciprocate the spindle, and gearing through which the drive shaft drives the cam shaft so arranged that a change in the gear ratio will change the amount of thread cut on a blank.

59. Feeding mechanism for bolt threading machines comprising a spindle, a spring thereon, a fixed collar on the spindle, a floating collar between the spring and fixed collar, an arm for moving the floating collar to reciprocate the spindle, a weight tending to keep the arm in position to force the floating collar against the fixed collar, a

cam for throwing the arm against the spring, and a cam for throwing the arm against the fixed collar.

60. Feeding mechanism for bolt threading machines comprising a spindle, a spring thereon, an adjustable collar on the spindle, a floating collar between the spring and adjustable collar, an arm for moving the floating collar to reciprocate the spindle, and a weight tendin to keep the arm in position to force the fl oating collar against the adjustable collar.

61. Feeding mechanism for bolt threading machines comprising a spindle, a cutter head thereon, a lever arm to thrust it resiliently toward a blank, a weight acting to retract the spindle, a cutter head closing device in the path of the head during retraction, a cam causing the lever arm to force the spindle toward the blank, and a cam causing the lever arm to force the cutter head positively against the closing device.

62. A. spindle, a cam, resilient means acted on by the cam to force the spindle in one direction, a weight, and rigid means acted on by the weight to force the spindle in the opposite direction.

63. A spindle, a cam, resilient means acted on by the cam to force the spindle in one direction, a weight, rigid means acted on by the weight to force the spindle in the opposite direction, and a second cam acting on the rigid means to force the spindle in the same direction as the weight.

MICHAEL J. RILEY.

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