US2359815A

US2359815A - Trip mechanism

Info

Publication number: US2359815A
Application number: US468476A
Authority: US
Inventors: Wilcox Richard Lester
Original assignee: Waterbury Farrel Foundry and Machine Co
Current assignee: Waterbury Farrel Foundry and Machine Co
Priority date: 1942-12-10
Filing date: 1942-12-10
Publication date: 1944-10-10
Anticipated expiration: 1961-10-10

Description

R. L. WILCOX TRIP MEcHANIsM Oct. 10, 1944.

Filed Dec. 10, 1942 3 Sheets-Sheet l R. L. WILCOX TRIP MECHANISM Oct. 10, 1944` 3 Sheets-Sheet 2 Filed Dec. 1o, 1942 Oct. 10, 1944. R. l.. wlLcox 2,359,815

TRIP MECHANISM Filed Dec. 1o, 1942 s sheets-sheet s 'sirable result is rarely attained. In the inven- Stopped and without injury 0r damage to the tion herein such action is automatic, machine Or t the tools, inasmuch as the failure It is an object of this invention to .provid 3o to eject the workpiece from the die through fracmeansk whereby the feed and transfer mechature of the breaker plete dees nOt Prevent the nisms will be stopped and brought to rest inpunch or punches from continuing their Operbe readily assembled with a conventional type its return stroke after having mede 9 Complete t of machine and that will immediately stop the forward feed of the stock and a workpiece hasoperation of the feed and transfer mechanisms been pushed inte the ngerS 0f the transfer when normal condition ceases to exist. mechanism.

vnism to a die or the like. This latter has an iS equally adapted to illustrate this invention.

Patented Oct. 10, 1944 I 359315:

UNITED STATES PATENT orricE' 2,359,815 nur MEcnAmsM Richard Lester Wilcox, Waterbury, Conn., assignor to The Waterbury Farrel Foundry and Machine Company, Waterbury, Conn., a corporation of Connecticut Application December 10, 1942, Serial No. 468,476

30 Claims. (Cl. 10-23) This invention relates to trip mechanism, partightly therein. This slight swelling does not ticularly associated with metal working maprevent the ejection of the workpiece from the chines, such as a header, upsetting machine or die by the knockout mechanism. If the walls the like, to automatically disengage and stop opof the opening in the die become rougheued or erating parts when conditions are abnormal. 5 scored, which may result from successive ejec- It is conventional in a header, upsetting mations of tight fitting workplaces, election of the chine or the like, to intermittently feed a length workpiece may become dimcult. In such case of stock, such as a wire or rod, into the machine the knockout mechanism, and particularly the and successively sever .portions thereof, which knockout pin. are subjected toan overload and portions are transferred to tools, where, after 1n occasionally will break without ejecting the` one or more operations are performed thereon, workpiece from the die. When the workpiece they are ejected therefrom. remains in the die the next succeeding workpiece Breakage of one or more parts, or faulty operiS prevented thereby from entering. This meyi ation thereof, results in damage to the tools, result in possible damage tothe tool or tools. In workpieces, etc. One' such faulty operation is l5 this invention when a condition occurs, such the failure or improper functioning of the knockas hereinbefore outlined, an abnormal strain out mechanism, due either to a jammed workis placed upon the breaker plate whether the piece, an obstruction, breakage, or otherwise. knockout mechanism is broken or not. The plate When such condition occurs it is desirable that is fractured thereby, and not Only further demsome or all of the mechanisms that unite in ege to the knockout mechanism iS prevented, but their function to produce the finished product, 9,150 the feed end transfer mechanisms are disbe stopped and remain at rest until normal conconnected from their operating mechanisms, ditions are restored. If only part is stopped it come to rest and So remain until normal condiis preferable that such part be the feeding and tions are again restored. The fracture, if any, transfer mechanisms. A watchful attendant may 0f the breaker plate Will Oeeur es the knockout discover an abnormal condition such es referred mechanism moves to eject the workpiece from to and stop the machine manually,`but this dethe die- By Such action. the feed of stock is stantly upon the development of a condition that etiOnS, and damage, if any, Will Only be to the prevents normal operation of the machine. This workpiece still in the die. The relative timing object is accomplished by mechanism that may 0f the feed mechanism iS Such that it iS upon With these objects in view, the invention re- The trip mechanism described is in part diS- sldes in the combination and arrangement of closed in the three following patents! 2,311,903, parts and in their details of construction, as for Feed mechanism; 2,318,825 for Cut-off and hereinafter set forth, and from which other transfer mechanism; end 2,323,699 fOr Transfer objects of the invention will be apparent. mechanism; dated respectively, February 23,

In mechanism of this character, after a por- Mei/11 and September 7, 1943.

tion of the stock is severed, the cut-ofi' portion, The header or upsetting machine to which the now a workpiece, is carried by transfer mechainventions disclosed in said patents are applied opening therein slightly larger than the work. In this form of machine the stock is intermitpiece, that is, just sumcient topermit the work- 5i tently fed into the machine at a station in regpiece to be readily projected therein. While inv ister with the wire line, a portion is cut 01T the this die the workpiece is upset by one or more end thereof, and 110W eS a workpiece is carried to pressure operations, which have a tendency to another station where the workpiece is pushed swell that portion of 'the workpiece within the out of the carrying element into fingers 0f a opening in the die and thereby cause it to nt transfer mechanism, which carries it into register with a fabricating tool or die at another station. At this latter station the workpiece is projected from the transfer fingers into the die,

where it is subjected to the action of pressure tools or punches. During this action the transfer mechanism is returned and the transfer iingers again brought into line with the pushout station to receive the next workpiece. The punches, after performing their operation upon the workpiece are withdrawn and a knockout pin ejects the upset workpiece from the fabricating tool or die. These operations are repeated during the continued normal functioning ofthe machine.

Referring to the drawings, in which like numerals of reference indicate like parts in the several figures;

Figure 1 is a fragmentary plan view of a header or upsetting machine with the improved mechanism herein disclosed applied thereto;

Figure 2 is a fragmentary side elevation thereof Figure 3 is a sectional view of a portion of this mechanism, the parts in section being taken generally upon line 3-3 of Figure 2;

Figure 4 is a view similar to Figure 3, the parts in section being taken generally upon line 4-4 of Figure 1;

Figure 5 is an end view thereof;

Figure 6 is a detail view of the latch mechanism; and Figure '7 is a view of a portion of the transfer mechanism.

In the drawings, the numerals I indicatethe frame or body of the machine, II and II* continuously rotating shafts journaled therein Il'I and II intermeshing gears by which motion is transmitted to the shaft II from the shaft IIB, and I2 and 25 cams upon the shaft I I, the former cam being the knockout cam and the latter the follower cam. These cams are engaged by rolls I3 and 28, carried by a rockably mounted knockout lever I4 journaled on a stud I5, fixed in the frame I0.

Mounted to reciprocate in the body I0 is the gate II carrying the punch holders II4, which are moved by mechanism, not shown, so as to successively present each of the two fabricating punches II6 in line with the fabricating die 56.

The header illustrated is of the two blow type, with the movement of the punches in substantially a horizontal line. The improvements herein are equally applicable however to a header having only one punchl or more than two punches, or when the shifting thereof is in a vertical as distinguished from a horizontal plane. Movable .within the frame I0 is a knockout slide I8, between which and the rockably mounted knockout lever I4 is a coupling or connection member I1. This member comprises in part a slide I8 connected with the rockably mounted knockout lever I4 by a pin I9, and a body 20 pivotally connected with the slide I6 by a pin 2 I. A pressure screw 22 is threaded in the inner end of the slide I8, with its head against a breaker plate 23 held by the pressure screw against the walls 24 of an opening in the body 20. Through the connection I1 reciprocatory motion is given the slide I3 in one direction by the knockout cam I2 through the rockably mounted knockout lever I4 and in the opposite direction by the follower cam 25. If anything should interfere with the norm-al operation of the slide I6, then the pressure of the pressure screw 22 against the breaker plate 23 fractures the same and the slide I8 moves within the body 20 without imparting movement to the slide I6, thus preventing damage either to the machine or injury to the workpiece. In one end of the slide I8 is a screw I I0 that engages one end of a knockout lever |08 that actuates the knockout pin I09 to eject a workpiece in a tool, as usual.

The mechanism immediately hereinbefore described is old in the art and not claimed `as part of this invention.

The slide i8 is provided at its outer end with

companion openings

21 and 28 vto receive the pin I8. The rockably mounted knockout lever I4 is provided with a plurality of staggered openings substantially parallel with each other, those on one side being designated 29 and those on the other side 30.

4Shifting the relative position of the slide I8 with the rockably mounted knockout leverl I4, through positioning the pin I9 in any of the holes 29 and 30, and either of the

holes

21 and 28, provides a fine degree of graduation for the length of stroke of the slide I6, and the knockout pin |09. Fixed on the body 20 is a bracket 3|, in which is a shaft 32. On this shaft is a rock lever 33, the outer end of which projects over the end of the slide I8 (Fig. 2), and maintains such position during normal movement of the parts. However, as the breaker plate is fractured the slide I8 moves independently within the body 20 and by lifting the outer end of the rock lever 33 rocks the arm 34 on the hub thereof.

Journaled on a stud 35 in the bracket 36, fixed to the slide I6, is arock lever, one arm 31 of which is connected with the arm 34 by the rod 38. The center of the pin connecting the rod 38 with'the arm 31 and the center of the pin connecting the body 20 with the slide I6 are substantially coincident. There is no lrelative motionv of arm 31 when conditions are normal'. The arm 39 of this rock lever is in contact with the lever arm 40 supported at one end by a stud 4I in the frame IB. This lever arm is substantially parallel with the slide I6 and the arm 39 moves in slight contact therewith and whereby it may act upon the lever irrespective of its relative lengthwise position. An adjustable screw 42 in the outer end of this plate which engages a lug 43 on the frame when in one of its positions, maintains the substantially parallel position of the lever arm.

A rock shaft 45 having a rock arm 46 thereon, carrying an adjusting screw 41, is journaled in the xed box 44. Between the adjusting screw 41 and the lever arm 40 is a movably mounted pin or actuator 48. Pressure of a coil spring 49, upon a pin 50, applied to the rock arm 46 holds the pin 48 in engagement with the lever arm 40. The tension of this spring is variable by the nuts 5I threaded on the pin 50. A plunger or stop element 52, slidably mounted in the box 44, is urged outwardly by a spring 53. This plunger 52 is held in one of its positions by a trip latch or holding member 54 on the rock shaft 45, the hook end of which, in one of its positions, engages a disk 55 adjustably held on the plunger 52. When the breaker plate 23 is fractured, the rock lever 33 and the lever arm 39 are. given independent rocking motions and the lever arm 40 and pin 48 are lifted, thereby actuating the rock arm 46.

The transfer mechanism herein is shown in detail in said application for Transfer mechanism, Serial Number 437,418.

Movable parallel with the fa'ce of the die block |23, and journaled on the rock shaft 99 is the swinging arm 51 forming part of the transfer ||9. The extent of movement of the swinging arm 51, and through it, the finger |20 is adjustable by the stop screws |25 and |26. Upon the shaft 59 is the transfer cam 65. Journaled vupon a pin 6| is a rockably mounted member 80 connected by an adjustable connection 63 with the rock shaft 62. Through the rock shaft 62, rock arm Ill, link ||9 and swinging arm 51, the nnger |20 is caused to swing upon its pivot mounting. In one direction through this mechanism a workpiece is carried from the push-'out station |22 into register with the fabricating diel 56.

The cam roll 64 upon lever 60 is held against the cam 85 by a spring 89 on va rod 68 slidable within a nut 61 in a fixed bracket 68. During its movement the stop lug 608^ on and near the upper end of the rock lever 60 moves adjacent to and opposite the outer end of the plunger 52, while the breaker plate is intact. However, when the breaker plate is fractured the hook end of the trip latch 54 is disengaged from the disk 55 and the spring 53 moves the plunger 52 outwardly into the path of the stop lug 60B, which upon engagement therewith, prevents further movement of the rock lever 80 and thereby action of the transfer mechanism. The plunger 52 is manually moved inwardly out of the path of the stop lug 60u and against the tension of the spring 53, by pressure upon the pin 1|, until the disk 55 is again engaged by the trip latch 54.

Fixed to the frame I is the feed roll bracket 1.2, having associated therewith feed rolls 13. These feed rolls are intermittently rotated by well known mechanism not shown, through a clutch mechanism 14, moved axially through a yoke member 15 fixed on a shaft 16 mounted in the bracket. One form of such rotating means is disclosed in said application for Feed mechanism, designated by the Serial Number 321,261. Upon the shaft 16 is ailever arm 11 and a hand lever 18.

Journaled on the stud 19, in the fixed box 80, is a rock lever or holding member 8|. Aplunger 82 is also movably mounted in this box, being urged in one direction by the coil spring 83. The outer end of this plunger contacts the lever arm 11. Upon the inner end of the plunger 82 is a disk 84, adiustably held thereon by suitable nuts. The hook end of the rock lever 8| is urged toward the disk 84 by spring ||3 and pin ||2. Supported in the box 80 and bracket 85, fixed to the frame or body I0, is a rod 86, at one end engaging the rock lever 8| and at the other end a rock lever 81 journaled in the bracket 85.

The numerals 88 designatea connection rod having a conventional type universal joint connection 88 with the rock lever 81 at one end and a similar universal joint connection 90 with the rock arm 9i upon the shaft 45. Thus, as the shaft 45 actuates the trip latch 54 to release the plunger 52, the lever 8| is actuated to release the plunger 82 through the connection 88, rod 36,- and associated parts. When released, the

plunger 82 is urged outwardly by the spring 83 against the tension of the spring 83 until the disk 56 is again engaged by the trip latch 54.

Within the feed roll bracket 12 is a gagger plate 8 2, held against displacement by a plate. not shown, the finger 84 thereon being movable into and out of the path of the lever arm 11 (Fig. 1). Journaled on the pin 8| is a rock lever 85, carrying a roll 86 held against the face of the cam 58 on shaft 68 by a spring plunger 91 within a fixed bracket 88. On the rock shaft 89 is a rock arm |00, which is connected with the rock lever by the connection yokes |0|, which are united at their inner ends by the rod |02 threaded into one yoke and slidable within the other yoke by sufficient excess pressure to compress the spring |03. This springv issuiliciently strong to assure proper action of the connection without relative movement of the parts, but the spring |03 will be compressed if the predetermined pressure is abnormal, and thus prevent damage or injury to other parts.

1) Thus, as the shaft 99 moves in one direction, the arm |01 actuates the rock lever I 05, and through it moves the gagger plate 92 in one di-j rection, that is, away from the lever 11. This gagger plate is moved in the direction toward the lever 11 by the spring 93, the pressure ofpwhch maintains the roll |06 in engagement with the arm 01. When normal conditions prevail, the gagger plate is reciprocated at each rotation of the shaft 58, and the finger 94 will at times go on one side of the outer end of lever arm and at other times upon the other side. When a complete feed of stock has been made the position of the gagger finger 94 is as shown f in Figure l, that is, in a rear position out of the path of the lever arm 11, at which time the shaft i 16 may be oscillated manually by the hand lever 18 or through pressure of theplunger 82 and thereby stop action of the feed mechanism. When the gagger finger 94 is in the position indicated, the lever 60 is in its back or rearmost position and the plunger 52 may be projected outwardly into the path of travel of the stop lug 60a. If so projected, the plunger prevents movement of the transfer mechanism and the transfer fingers are in such position that the workpiece is held out of the path of the pressure tool, substantially as shown in Figure 7 to receive a workpiece at the push-out station. Thus, the instant the breaker plate 23 is fractured, the trip mechanisms l function and the plungers 52 and 82 are simultaneously released. This release occurs at the correct time for the plunger 52 to interrupt the travel of the lever 60 and the plunger 82 to actuate the shaft 16. AWhen the feed mechanism is advancing the stock, the hand lever 18, arm 11 and gagger plate 82 are substantially in the position shown in Figure 1 with the finger 94 reciprocating on the left of the arm 11, and the plunger 82 is withheld from motion by the latch 8|. During the rotation of the shaft 58, regardless of the position of other parts, 'the gagger plate 32 makes one complete reciprocation at each revolution of the shaft; thus the finger 84, when stock is being fed, will move on the left side of the lever arm 11, preventing oscillation .of the shaft 18, either by hand lever 18 or plunger 82, while the gagger plate is in a forward position. When the gagger plate 82 is moved to a rear position the hand lever 18 may be actuated. When so actuated the lever arm 11 is moved toa position whereby the gagger finger 94, while continuing its reciprocation, will move on the right side of lever arm 11 and prevent movement of hand lever 18 lto engage thelfeed, except when the gagger nger 94 is in a rear position. The tripping of the latch 8| occurs when the gagger finger 94 is in a rear position. The operator is free at any time, regardless of the trip mechanism, to either startv or stop the feed manually through the hand lever 18 whenever the gagger plate 821s in a rear position, which is the correct time to engage the feed and insure a full length feed of stock.

'Ihe relative timing of the severalmechanisms is such that when the gagger plate 92 is in a forward position on either side of the levenarm 11, the feed mechanism is locked against manual control for either engagement or disengagement of the feed. Thus, the correct time to manually engage or disengage the feed is when the gagger plate J2k is in a rear position and the finger 94 thereon out of the path of the lever arm 11. Also, the timing is such that the plunger 82 is only released to apply pressure to the lever 11 when the gagger plate is in a rear position, which is the only time that the breaker plate is fractured.

The Wire or stock is advanced at the same time that the workpiece is being projected into the transfer mechanism at the push-out station.

Thus the workpiece is held out of the path of a punch H6 at its next movement toward the fabricating die 56, and there remains-until a, new breaker platehas been substituted. f

If a workpiece should become clogged in the is fractured, instantly, the plungers or stop members 52 and 82 are released and are projected outwardly. This causes a full stop of the transfer mechanism, with the workpiece held out of the path of the die and pressure tools; also, a full stop of the feed mechanism through the action of this trip mechanism.

Within the scope of the appended claims,

changes and alterations may be made within the spirit of this invention.

What is claimed is:

1. In a metal working machine having a continuously operating driving mechanism, means actuated thereby for intermittently feeding stock into the machine, for successively cutting off portions of said stock, transferring such portions to a stationary tool, and for ejecting said portions from said tool; and normally inoperative means including a movably mounted stop member for automatically and positively stopping the feeding and transfer mechanisms independently of the driving means iff and when the ejecting means is restrained from normal action.

2. In a metal working machine having a stationary apertured tool, means for transferring a workpiece to said tool, and a knockout pin for ejecting the workpiece from the tool; the combination therewith of a normally inoperative movably mounted element for positively stopping the transfer mechanism at a. predetermined point in advance of the tool if and when the ejecting mechanism is yrestrained from normal action by a workpiece remaining in the tool.

3. The combination with a tool fora metal Y working machine, of a knockout member for ejecting a workpiece from the, tool, means for moving the knockout member relative to the tool, comprising in part a rockanle element, a movable member engaging and `actuating the rockable element in one direction, said'rockable element and movable member being upon a stationary part, a rockable lever having a plurality of spaced and staggered openings, and a connection between the movable member and rockable lever; and means cooperating with said openings for separably and operatively securing the connection and rockable lever at various places.

4. In a machineof the character described, a rockable member having a plurality of substantially parallel openings spaced from and staggered in relation to each other, and a reciprocating member, the combination therewith of a connection element between said members; and means for operatively joining said element with the rockable member at various places, comprising a removable member adapted to engage any one of said openings, and whereby the extent of movement of said reciprocating member is variable.

5. In a header, the combination with transfer mechanism for carrying a workpiece vfrom one station to another, comprising in part a rockable member; of a. stationary tool adapted to receive a workpiece; a knockout pin for ejecting the workpiece from the tool; mechanism, comprising in part a normally-inoperative stop element between the knockout pin and transfer mechanism and a breaker plate for holding said stopv element in its normally inoperative position, whereby if and when the normal action of the knockout pin is restrained, the breaker plate is fractured and the stop element is projected into the path of the rockable member When-the transfer mechanism is at a predetermined .position, in advance of the tool to thereby prevent further advance movement of the transfer mechanism.

6. The combination with transfer mechanism for carrying workpieces from one station to another; of a tool adapted to receive a workpiece; means for ejecting the workpiece fr om the tool; and mechanism between the ejecting mechanism and transfer mechanism whereby if and when` the normal action of the ejecting mechanism is restrained a, stop member 4forming a part thereof is projected into the path of a moving element of the transfer mechanism and thereby prevents further travel thereof, said mechanism between the ejecting and transfer mechanisms comprising in part a yieldable coupling that holds the stop member against movement during the normal action of the ejecting mechanism, and elements, action of which is initiated by the coupling when it yields by excess pressure, that cause the stop member to move into its projected position.

7. The combination with transfer mechanism for carrying workpieces from one station to another; of a tool adapted to receive a workpiece; means for ejecting the workpiece from the tool; and mechanism between the ejecting mechanism and transfer mechanism whereby if and when the normal action of the ejectingmechanism is restrained a stop member forming a part thereof is projected into the path of a moving element aasasis Y of the transfer mechanism and thereby prevents further movement thereof. said mechanism between the electing and transfermechanisms comprising in part a yieldabie coupling that holds the atop memberagainst movement during the normal action of the electing mechanism, an

element carried by the coupling, and mechanism that normally restrains the stopmember from movement but which is released and permits the stop member to move into its projected position through the action of the coupling when it yields' by reason of, excess pressure;

8. In a machine of the character described,

the combination with a driving element; of a tool adapted to receive a workpiece; means for electing the workpiece from the tool, comprising in part a reciprocating member, a yieldable oonnection between the driving element and reciprocating member. composed of plural parts held against movement relative to each other during normal movement of the electing mechanism and relatively to each other when the electing mechanism is restrained against normal action by an obstruction or otherwise; a transfer mechanism for carrying a workpiece to the tool; and means for stopping movement of the transfer mechanism when the normal y,action of the ejecting mechanism is restrained, comprising in part a member movable into the path of the transfer mechanism; and releasable means between the saidV connection and member for holding the member against movement while the connection l parts operate as a unit.

9. In a machine of the character described, the combination of a driving element, a transfer mechanism, a slide, a connection between the driving element and slide having plural partsr held together as a unitary structure by a breakable element, a movable element connected with one of said parts and having engagement with said breakable member, an arm connected therewith, a movable member connected with the slide, a connection member between the arm and movable member whereby movement is imparted to the movable member through said connection member when said breakable element is frac' tured.

10. In a machine of the character described, the combination of a driving element, a transfer mechanism, a slide, a connection between the driving element and slide having plural parts held together as a unitary structure by a breakable element, a movable member connected with one of said parts and having engagement with said breakable member, an arm connected therewith, a movable element connected with the slide, a connection member between the arm and movable element whereby movement is imparted to the movable element through said connection Vand transfer mechanism whereby if and when the normal action of the electing mechanism is restrained a stop member forming a part thereof is projected into the pathv of a moving element of the transfer mechanism and thereby prevents further travel thereof, said mechanism between the electing and transfer mechanisms compris- .which frees said releasable elements and whereby the stop member moves into th path of a part of the transfer mechanism.

12. In a metal working'machine having a continuously operating driving mechanism,A

means actuated thereby for intermittently feeding stock into-the machine, for successively cutting of! portions of said stock, transferring such portions to a tool, and for electing said portions from the tool means for automatically stopping the feeding mechanism if and when the ejecting means is restrained from normal action, comprising in part a clutch, an oscillating shaft, a connection between the shaft and clutch, a gagger'plate or the like, means for imparting movement to the gagger plate, an arm on the oscillating shaft which moves in a path opposite the gagger plate, a plunger movable in a fixed part having engagement with said arm, a yieldabie coupling, releasable means between the coupling and plunger that holds the plunger against movement during the normal action of the electing mechanism, but. permits its independent movement When the electing means is restrained from normal action.l

13. In a metal working machine having a continuously loperating driving mechanism,l means actuated thereby for intermittently feeding stock into the machine,` for successively cutting off portions of said stock, transferring 'such portions to a tool, and for electing said portions from the tool;v means'for automatically stopping the' feeding mechanism if and when the electing means is restrained from normal action, comprising in part a clutch, an oscillating shaft, a connection vbetween the shaft and clutch, a gagger plate or the like, means for imparting a reciprocating movementto the gagger plate, an arm on the oscillating shaft which' moves in a path opposite the gagger plate, a plunger in a fixed part having engagement with said arm, a yieldable coupling that holds the plunger against movement during normal action of the electing mechanism, and means for actuating the oseillating shaft, and through it shifting the clutch to disengage the feed, action of which is initiated by the coupling when it yields by reason of undue pressure as the electing means is restrained from normal action.

14. In a metal working machine having a continuously operating driving mechanism, means actuated thereby for intermittently feeding stock into the machine, for successively cutting off portions of said stock, transferring such portions to a tool, and for electing said portions from the tool, the electing means comprising in part a plural part connection held together as a unitary structure by a breakable element; means for automatically stopping the feeding mechanism if and when the electing means is restrained from normal action, comprising in part a clutch, an oscillating shaft, a connection between the shaft and clutch, a gagger plate or the like, means for imparting movement to the gagger plate, an arm on the oscillating shaft which moves in a path v opposite the gagger plate, a plunger in a fixed part having engagement Awith said arm, a coupling that holds the plunger against movement during the normal action of the electing mechanism,fand means, actuated by the ejecting means for releasing the coupling when the electing means is restrained from normal action and the said breakable element is fractured, whereby all of the parts of the connection move relatively to the other parts.

15,The combination with mechanism of the character described having a feed station, a pushout station, and a fabricating station having a forming tool thereat. of means for transferring a workpiece from the push-out station to the fabricating station, means as 'a knockout pin for electing a workpiece from said tool, pressure actuated means, and mechanism connected to said pressure actuated means for actuating the latter for stopping the movement of the knockout pin and work transferring means if and when normal action of the knockout pin is prevented by jamming of a workpiece in said tool, whereby to stop the transferring means when a workpiece carried thereby is advanced toward the fabricating station during the jamming thereof by a previously operated upon workpiece.

16. The combination with mechanism of the character described having a feed station, a pushout station and a fabricating station, of means for transferring a workpiece from the push-out station to the fabricating station, means, as a knockout pin, for ejecting a workpiece from the fabricating station, and means for stopping the movement of the ejecting means and the transfer means when the pressure required to elect a workpiece from the fabricating station exceeds a predetermined degree, said stopping means including mechanism to prevent further movement of the transfer means when a workpiece carried thereby is in substantial register with the pushout station.

17. In a header, a stationarytool; mechanism for feeding stock into the header; mechanism for cutting off portions of the stock; mechanism for transferring the cut-oil portions to the tool; mechanism for ejecting the workpiece from the tool, comprising in part a connection member -or coupling, having a breaker plate that will fracture with excess pressure from the ejecting mechanism; an actuating member for the feed mechanism; a stop member for the transfer mechanism; means for holding said members in an inactive position; mechanism between the connection member or coupling and each of s-aid members to release said members; and means to move said members to stop further action of the feed and transfer mechanisms when said breaker plate is fractured.

18. In a header, a stationary tool; mechanism for feeding stock into the header; mechanism for cutting oi portions of the stock; mechanism for transferring the cut-off portions to the tool; mechanism for ejecting the workpiece from the tool, comprising in part a connection member or coupling, having a breaker plate that will fracture with excess pressure from the ejecting mechanism; an actuating member for the feed mechanism; a stop member for the transfer mechanism; means, comprising in part a latch for each' of said members that hold the member in an inactive position; mechanism between the connection member or coupling and each of said latches, which will ac tuate the latches and release the members, whereby the springs will move said members into position to stop further action of thefeed and transfer mechanisms, when the breaker plate is fractured.

1'9. In a header, a stationary tool; mechanism near one side thereof for feeding stock into the header; mechanism for cutting off portions of the stock; mechanism for transferring the cutoff portions to the tool; mechanism for ejecting the workpiece from the tool, comprising in part a connection member or coupling on the side of the header opposite to the feed mechanism,

having a breaker plate that will fracture with excess pressure 'from the electing mechanism; an actuating member for the feed mechanism; a stop member for the transfer mechanism; means for holding said members in anl inactive posiiton; mechanism between the connection member or coupling and each of said members to release said members; and means to move said members to stop further action of the feed and transfer mechanisms when said breaker plate is fractured.

20. In a header, a stationary tool; mechanism for feeding stock into the header; mechanism for cutting oil' portions of the stock; mechanism for transferring the cut-off portions to the tool; mechanism for ejecting the workpiece from the tool, comprising in part a connection member or coupling, having a breaker plate that will fracture with excess pressure from the ejecting mechanism; an actuating member for the feed mechanism; a stop member for the transfer mechanism, said members being upon opposite sides of the header; means for holding said members in an inactive position; mechanism between the connection member or coupling and each of said members to release said members; and means to move said members to stop further action of the feed and transfer mechanisms when said breaker plate ls fractured.

21. In a header, the combination with a driving element; of a reciprocating slide; a connection between the driving element and slide, having a breaker plate as part thereof; a trip device carried by the connection, inactive while the breaker plate is intact and actuated when the breaker plate is fractured; a rockable lever mounted on the slide and movable therewith; a rod or the like connecting the trip device and rockable lever; a. lever arm positioned so as to be in contact with the rockable lever throughout its entire reciprocation; and an actuator movable in a fixed part and having engagement with the lever arm.

22. In combination; a slide; a driving element; al connection between the driving element and slide, said connection having partsv movable in relation to each other; a breaker plate that holds said parts against relative movement; a lever mounted on the connection, one end of which projects over the breaker plate; a rockable lever movable with the slide; and a rod connecting the lever and rockable lever.

23. In a header having a driving element; a tool, means for feeding stock into the header, transfer mechanism to carry workpieces to the tool, and means for ejecting a workpiece from the fool; the combination therewith of means for actuating said mechanisms from the driving element comprising in part a connection having members that are held against relative movement by a breaker plate or the like, a stop member to limit the movement of the transfer mechanism, a plunger in engagement with a part of a part on the oscillating shaft, means for holdthe feed mechanism, means for holding the stop member out of the path of the transfer mechanism, means for holding the plunger in one position, and means, set in motion by the fracture of the breaker plate to release said stop member and plunger, said means including as part there-- of a lever arm and an actuator moved thereby.

24. In a header; a tool; means for transferring a workpiece to the tool, having as a part thereof a rockable lever; mechanism to eject the workpiece from the tool; means for actuating the ejector mechanism, comprising -in part a connection having a breaker plate forming part thereof; a trip mechanism on the connection and held against movement while the breaker plate' is intact; a plunger or the like movable into the path of the rockable lever to prevent movement thereof; a member for holding the plunger in its retracted position; means between the holding member and trip mechanism, whereby the holding member will be moved to release the plunger when the breaker plate is fractured and the trip mechanism actuated as a result thereof; and means for projecting the plunger into the path of the rockable lever when released from the latch.

.25. In a header; a tool; meansfor transferring a workpiece to the tool, having as a part thereof a rockably mounted member; mechanism to eject the workpiece from the tool; means for actuating the ejector mechanism, comprising in part a connection having a breaker plate forming part thereof; a trip mechanism on the connection and held against relative movement while the breaker plate is intact; a plunger or the like movable into the path of the rockably mounted member to prevent movement thereof; a member for holding the plunger in its retracted position; means between the holding member and trip mechanism, whereby the holding member will be moved to release the plunger when the breaker plate is fractured and the trip mechanism actuated as a result thereof, said means comprising in part a rock lever; a con- -nection between the rock lever and trip mechanism; an intermediate plate with which the rock lever is in engagement and actuated thereby irrespective of its relative endwise position therewith; an actuator between the intermediate plate and holding member; and means for projecting the plunger into the path of the rockably mounted member when releasedfrom the holding member.

26. In a header, a driving element, a feed mechanism for moving stock into the header having feed rolls, a make and break mechanism for transmitting and cutting oif power to the feed rolls, an oscillating shaft having a part thereon connected with the make and break mechanism, an arm fast on the oscillating shaft, mechanism cooperating with the oscillating shaft to prevent stopping the -feed rolls prior to the completion of a full length feed of stock intoI the header, a connection or coupling having a breaker plate through which power is transmitted, an actuating member positioned to enase actuated thereby for intermittently feeding stock into the machine for successively cutting off portions thereof, for transferring said cut-off portions to a forming tool, and for electing formed portions from said tool; normally inoperative stop mechanism for automatically stopping the feeding and transfer mechanisms independently of the continuously operating driving mechanism, and pressure responsive means for holding the stop mechanism in inoperative position, said pressure responsive means being adapted to ,release the stop mechanism to operative position when the pressure thereon exceeds a predetermined degree.

28. A machine of the character described, including a cut-off mechanism, a transfer mechanism, a stock forming tool, a knockout pin, means for actuating said elements in timed sequential relation, normally inoperative stop means for the transfer mechanism and knockout pin, and pressure responsive means directly connected to said stop means for moving the latter to operative position when the pressure thereon exceeds a predetermined degree.

29. A machine of the character described, including a driving mechanism, stock transfer mechanism, stop means normally biased to inoperative position adjacent the path of movement of the knockout mechanism, yieldable means connecting the driving and knockout mechanisms, and means operable by the connecting means upon yielding of the latter to cause the stop means to be projected into the path of movement of the knockout mechanism for stopping the further movement of the latter independently of the continued movement of the driving mechanism.

30. A machine of the character described, including a driving mechanism, a forming tool,

means to transfer a workpiece to said tool to be gree, and being operative to release the stop means for projection into the path of movement of the transfer and the workpiece removing means so as to stop the same independently of thecontinued movement of the driving mechanism, when the pressure thereon exceeds said predetermined degree.

alcalino LESTER wmcox