US3101632A

US3101632A - Machine for forming metal articles

Info

Publication number: US3101632A
Application number: US701490A
Authority: US
Inventors: Herbert L Hoyt
Original assignee: Textron Industries Inc
Current assignee: Textron Industries Inc
Priority date: 1957-12-09
Filing date: 1957-12-09
Publication date: 1963-08-27
Anticipated expiration: 1980-08-27
Also published as: CH375321A; CH422694A

Description

Aug. 27, 1963 H. L. HOYT 3,101,532

MACHINE FOR FORMING METAL ARTICLES Filed Dec. 9. 1957 8 Sheets-Sheet 1 fa X W; W

ATTORNEYfi Aug. 27, 1963 Filed Dec. 9. 1957 HOYT 3,101,632

MACHINE FOR FORMING METAL ARTICLES 8 Sheets-Sheet 2 Aug. 27, 1963 H. HOYT 3,101,632

MACHINE FOR FORMING METAL ARTICLES Filed Dec. 9. 1957 8 Sheets-Sheet 3 g ATTORNEY5 Aug. 27, 1963 H. L. HOYT 3, 1, 32

MACHINE FOR FORMING METAL ARTICLES Filed D60. 9. 1957 8 Sheets-Sheet 4 INVENT OR ATTORNEY-5 Aug. 27, 1963 H. L. HOYT MACHINE FOR FORMING METAL ARTICLES 8 Sheets-Sheet 5 Filed D60. 9. 1957 1 I l x I L FEEEEJ Mil 7 WvM) ATTORNEYS Aug. 27, 1963 H. L. HOYT 3, ,632

MACHINE FOR FORMING METAL ARTICLES Filed. Dec. 9. 195'? 8 Sheets-Sheet 6 ATTORNEYS x 1963 H. L. HOYT 3,101,632

MACHINE FOR FORMING METAL ARTICLES Filed Dec. 9. 195? 8 Sheets-

Sheet T

1, 139 ff} I ATTORNEY Aug. 27, 1963 H. HOYT 3,101,532

MACHINE FOR FORMING METAL ARTICLES Filed Dec. 9. 1957 8 Sheets-Sheet 8 INVENT OR M .f /7 W n I ATTORNEYS United States Patent 3,101,632 MACHINE FOR FORMING METAL ARTICLES Herbert L. Hoyt, Waterbury, Conn., assignor, by mesnc assignments, to Textron Industries, Inc., a corporation of Delaware Filed Dec. 9, 1957, Ser. No. 701,490 9 Claims. (Cl. 78l7) This invention relates to a machine for forming metal articles and particularly to a machine of this type known as a heading apparatus wherein a workpiece is cut from a length of wire stock and thereafter headed by the cooperative action of punches and dies. While the particular apparatus illustrated and described herein relates to what is usually called a two-blow header, it will be understood that the principles of the invention may be employed in other relations.

In a heading apparatus or" the character illustrated there is usually provided a die bed having one or more dies therein and a reciprocating gate carrying punches or forming tools to cooperate with the die. A length of stock is fed through a cut-off die from which a workpiece is severed by a moving knife or shear member, and this workpiece is carried to a working or processing die or dies in which the heading operation is effected. Where a single heading die is employed the reciprocating gate carries a plurality of punches, usually two in a two-blow header, which cooperate with the single die upon alternate strokes of the gate. To this end the punches are movably mounted upon the gate and are shifted between the reciprocations thereof so that first one and then the other will be in position to cooperate with the die in performing work upon the workpiece or blank.

In the present instance the gate is operated from a crank shaft by means of a pitman which connects the crank shaft to the gate. As illustrated herein a doublearmed pitman is employed in that the pitman is provided with two spaced arms which embrace two spaced crank portions on the crank shaft to provide for efficient and evenly balanced actuation of the gate.

Novel means are also provided to shift the punches upon the gate between advancing movements of the latter in order that this shifting may be accomplished with certainty and efficiency to the proper positions so that each of the punches will properly cooperate with the single die. Also means is provided to lock the punches in the positions to which they are shifted so that they will be securely fixed in position to register with the die.

In machines of this character it sometimes occurs that the work is adapted to stick to the punch and be drawn out of the die when the gate is retracted. Novel and efiicient means are provided herein to eject the workpiece from the punches upon the withdrawal of the gate so that the workpiece will remain in the die for operation thereon by the second punch or so that it can be properly ejected from the die after the final operation. This ejector mechanism is properly timed with the withdrawal of the punches so that, as each punch withdraws, the workpiece will remain in the die opening and be prevented from clinging to the punch.

Also in the present application novel means are provided for cutting or severing the workpiece from the blank, gripping the workpiece so severed and carrying it to the next working station for a processing operation. It will be understood that, While as disclosed in the present application an extruding die and punch are provided for performing an extruding operation thereon so as to reduce the cross-sectional size of the shank of the final article, the improvements herein claimed are not to be limited to a header provided with extruding mech- 3,101,632 Patented Aug. 27, 1963 "ice anism but are of broad application to headers of other types and other machines for forming metal articles.

One object of the invention is to provide a new and improved heading mechanism for heading metal blanks.

A further object of the invention is the provision of a he ading mechanism having a die bed carrying a processing die and a reciprocating gate carrying punches shif-tably mounted thereon to cooperate with the die, and new and improved means for reciprocating the gate.

Still another object of the invention is to provide an apparatus of the character described with a crank shaft and a pitman connecting the crank shaft to the reciprocating gate, the pitman being of novel construction in that it is provided with a plurality of arms embracing a plurality of crank portions on the crank shaft.

Still another object of the invention is to provide a heading apparatus having a die and reciprocating gate carrying punches to cooperate with the die with improved means for shifting the punches carried by the gate from one position to another on the gate so that each will be in position to cooperate with the die upon the advance of the gate.

Still another object of the invention is to provide a heading mechanism of the character previously described wherein means are provided for locking the punches in the position to which they are shifted so that each of the punches upon alternate strokes of the gate will be securely held in position to register with the die.

Still another object of the invention is to provide a new and improved ejector mechanism for preventing the workpieces or blanks from clinging to the punches upon the withdrawal thereof in a direction away from the die.

Still another object of the invention is the provision of a heading mechanism of the character described wherein the means for ejecting the workpieces from the punches or preventing them from clinging to the punches is properly timed with the operation of the gate.

A still further object of the invention is the provision of a new and improved means for severing the workpiece from a length of wire or rod stock and transferring this workpiece to a working die station upon the machine.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

FIG. 1 is a top plan view of a heading mechanism embodying my invention;

FIG. 2 is a longitudinal sectional view of a portion of the apparatus taken on line 2--2 of FIG. 1;

FIG. 3 is a transverse sectional view on line 33 of FIG. I looking in the direction of the arrows;

FIG. 4 is a transverse section on line 4-4 of FIG. I looking in the direction of the arrows;

FIG. 5 is an enlarged elevational view of a portion of the die bed showing the races of the dies therein and a portion of the transfer mechanism;

FIG. 6 is a sectional view on line 66 of FIG. 3;

FIG. 7 is a sectional view on line 77 of FIG. 6;

FIG. 8 is a horizontal sectional view through the douhie-armed pitman taken on line 88 of FIG. 2;

FIG. 9 is an enlarged plan view of a portion of the gate showing the means for ejecting the blanks or workpieces from the punches;

FIG. 10 is a sectional view on line 10-10 of FIG. 9;

FIG. 11 is a detail view similar to FIG. 3, showing a modification of the connection of the punch shifter mechanism with the punch carrier; and

FIG. 12 is a sectional view on line 12-12 of FIG. 11.

To illustrate a preferred embodiment of the invention there is shown in the drawings a heading or upsetting device comprising a bed or frame having an upstanding portion 11 upon which is carried a die block 12 and an upstanding portion 13 adjacent the rear end of the frame. In the members 11 and 13 are slidably supported a pair of rods 14 (FIGS. 2 and 3), to which rods are secured the gate 15. Upon this igate are supported a pair of heading

punches

16 and 17, which punches are mounted for sliding movement transversely of the direction of travel of the gate as will be later explained.

A pivot rod 18 is mounted in a block member 57 (to be described hereinafter) adjustably mounted in the gate 15, to which rod is secured a double-armed pitman (FIGS. 2, 7 and 8). Spaced

rollers

19 and 20 are provided upon this rod between its

end bearings

21 and 22 in the block.

The pitman comprises a central body 23 having a bearing 24 surrounding the intermediate portion of the pivot rod 18 whereby, when the pitman is actuated, the gate will be withdrawn away from the die bed or toward the right, as shown in FIG. 8. The pitman is also provided with a pair of rearwardly extending

arms

25 and 26 which, as illustrated, are formed integrally with the body portion 23. Wear plates of arcuate shape 27 and 28 are provided at the forward ends of these arms, which wear plates bear against the

rollers

19 and 20 on the pivot pin 18. As the pitman is actuated, the wear plates 27 and 28 will bear against the

rollers

19 and 20 on the pivot rod 18 and push the gate forwardly in its operative stroke toward the dies. Thus two spaced areas of contact are provided between the

arms

25 and 26 of the pitman and the block 57 on the operative stroke of the latter, and these areas are of relatively large extent as compared with the size of the pivot pin 18. A wear plate 30 may be secured to the block 57 to take the thrust of the

rollers

19 and 20 and thus relieve the strain on the pivot pin 18.

The

arms

25 and 26 of the pitman extend rearwardly and are provided with openings which embrace crank

portions

31 and 32 on a crank shaft 33 rotatably mounted in the portion 13 of the bed. These crank portions are also of enlarged size with respect to the size of the crank shaft. As will be seen from FIG. 2, this shaft has a portion of normal size between the crank

portions

31 and 32. Upon the return or inoperative stroke of the gate the force applied by the pitman is taken by the portion of the pivot rod 18 between the

rollers

19 and 20.

As shown in FIG. 1, the crank shaft 33 may be driven by the pulley 33 which may be turn be driven from any suitable source of power.

As illustrated, the heading operation may be performed in two stages as is usual in the well-known two-blow header and, therefore, the two heading

punches

16 and 17 may cooperate with a single die to be hereinafter described. Provision is made, therefore, for shifting the heading punches on the gate in a direction transverse to the direction of travel of the gate. To this end the punches are mounted upon a punch carrier 34 (FIGS. 2 and 3) secured, by a bracket 35, to transverse rods 36 which are slidably mounted in the gate 1.5 so that the punches are slidably mounted on the gate. This bracket member is provided with spaced ears 37 by which is carried a pin 38, and a slide 39 is mounted upon this pm.

The slide 39 is adapted to reciprocate longitudinally of the frame in a guide member 40 provided at the upper end of a rocker 41 pivoted at 42 to the frame, which guide member has an outwardly facing channel. A link 43 (FIG. 3) is pivoted at 44 to this rocker member at one end and the other end of the link is pivoted to an upstanding lever 45 pivoted to the frame at 45 and having arms 46 and 47, rigid therewith, carrying

cam follower rollers

48 and 49 to cooperate with cams 50 and 51 secured upon a side shaft 52, which cams will serve to reciprocate the link 43 and, therefore, shift the

punches

16 and 17. The shaft 52 is driven from a transverse shaft 53 (FIG. 1) which in turn is driven from the crank shaft 33 by means of a gear 54 on the crank shaft which meshes with a gear 55 on the shaft 53. The relationship of these gears is such that the shaft 52 is driven at one half the rotational speed of the crank shaft.

With the above arrangement it will be seen that upon rotation of the cam shaft 52, the punches will be shifted first in one direction and then the other, these shifts occurring upon alternate receding movements of the gate. The slide 39 secured to the punch carrier will move to and fro in the guide member 40 secured to the shifting lever 41 during reciprocation of the gate.

In order to adjust the connection of the pitman with the gate, the pivot rod 18 is mounted in a block 57 slidably mounted on the gate and adjustable with respect thereto. A wedge member 58 carried by the gate lies between the block 57 and the body Olf the gate and may be adjusted in a vertical direction by the adjusting screw 59. The gate may be locked in a position against this wedge member by means of the locking screws 60 (FIGS. 1 and 2) threaded into bosses 61 upon the gate, the inner ends of these screws bearing against an inclined surface 62 on the block 57. This screw will, therefore, hold the block firmly against the adjacent surface of the wedge 58. It will be noted that the abutting surfaces of the wedge and block are inclined, as shown in FIG. 2.

As shown in FIG. 4 the die bed 12 is provided with a cut-off die 64, an extruding die 65 and a heading die 66. Reciprocable or sliding

cutters

67 and 68 are provided to sever a blank at the cut-off station 64 and carry it to the extruding die 65 (FIGS. 2, 4 and 5). The actuating mechanism for these cutters will be described hereinafter. When the blank arrives at the extruding die or extruding station 65, it is ejected from the cutters into the die by an extruding punch 70 (FIG. 2) carried by a plunger 71. This plunger is operated by mechanism designated generally by the numeral 72 actuated from

cams

73 and 74 on the shaft 53. As this extruding punch and associated mechanism is not claimed in the present application, no further description thereof is required. It may be noted, however, that the extruding punch is slidably carried in

bearings

75 and 76 on the gate and is positioned between the

arms

25 and 26 of the pitman which actuates the :gate.

Also suitable transfer mechanism designated generally by the numeral 77 (FIGS. 4 and 5) is provided to carry the blank from the extruding die 65 to the heading die 66, and, as this transfer mechanism is likewise not claimed in the present application, no further description thereof or of its operating means is necessary.

As shown more especially in FIGS. 2 and 6, means are provided to lock the punches in the positions to which they are shifted laterally on the gate during reciprocation of the latter. To this end the bracket 35 on the punch carrier 34 is provided with a rearward projection 79 and a plunger 80 is slidably mounted in the gate, the nose 81 of which cooperates with this projection. To the rear end of this plunger is pivoted at 82 one arm 83 of a bell crank lever pivoted to the gate at 84. The other arm of this lever 85 carries a cam follower roller 86 adapted to engage the face of a cam plate 87 secured to the main frame of the machine. It will be apparent that, as shown in FIG. 6, as the gate withdraws from the dies or moves to the right, the roller 86 will ride upon the cam face 87 and rotate the bell crank lever in a counterclockwise direction about the pivot 84. This will withdraw the nose 81 of the plunger 80 away from the projection 79 and permit the punch holder to move from the full-line position shown in FIG. 6 toward the dotted-line position shown in this figure. When the gate returns toward the dies upon its operative stroke, the roller 86 will ride off the cam face 87, as shown in full lines in FIG. 6 and the bell crank lever will be moved in a clockwise direction by means of a plunger 88 slidably mounted upon the gate and urged forwardly by the spring 89. This will return the locking plunger 80 to its forward position in which its nose 81 engages the projection 79 on the punch carrier bracket so as to lock the carrier in position at the operative stroke of the gate.

Referring to FIG. 4, the knife 68 is slidably mounted in the frame of the machine and carried by a plunger 90 pivoted at 91 to the upper end of a lever 92 pivoted at 93 to the frame. One end of a link 94 is pivoted at 95 to the lever 92, the other end of this link being carried by a bell crank lever 96 pivoted to the frame at 97. Upon one arm of the bell crank lever 96 is provided a cam follower roller 98 to cooperate with a cam 99, while the other arm of the bell crank lever carries a cam follower roller which is likewise engaged by the peripheral surface of a cam 101. The earns 99 and 101 are secured to the side shaft 52 previously referred to. Therefore, when the shaft 52 is rotated, the member 68 will be positively moved in both directions in timed relation to the movement of the gate.

The knife 67 is carried by a plunger 102 slidably mounted in the die bed, the outer end of this plunger being pivoted at 163 to a lever 164 which is in turn pivoted at 105 to an oscillating bracket 106. An adjusting screw 197 is threaded in the lever 104 and bears against a shoulder 188 on the bracket, while an adjusting screw 169 is threadedly mounted in the bracket 106 and bears against shoulder 110 on the lever 104 so that the latter may be adjusted in either direction about its pivot 105 and held rigidly in such adjusted position.

The bracket 106 is provided with a cam follower roller 111 adapted to engage the periphery of a cam 112 and is also provided with a cam follower roller I13 adapted to engage the periphery of a cam 114. Both

cams

112 and 114 are provided upon the side shaft 52, as shown in FIG. 1.

Thus the severing members 67 and 68 (the latter being principally a gripping member) are operated independently as is desirable in order that the knife 68 may be retracted toward the left, as shown in FIG. 7, and be compelled to dwell in its retracted position in order that the stock from which the blank is cut may be fed past the knife while the other operations of the device are being carried out. Also the cooperating knife or gripping member 68 may be moved to the right, as shown in FIG. 4, so as to be out of the way of the transfer mechanism when the workpiece is delivered to the latter after being ejected from the extruding die 65. It will be noted that two

cams

112 and 114 are provided, each moving the member 67 in one direction, while two

cams

99 and 10 1 are provided, each moving the member 68 in one direction so that movement of the two

members

67 and 68 in each direction is independently controlled and the cams may be so shaped as to bring about any desired movement and dwell thereof.

In heading devices of this kind it sometimes occurs that the blanks are inclined to cling to the punches and be carried away from the dies with the withdrawal of the gate. In order to prevent such an occurrence, timed ejector mechanism is provided to eject the work from the punch cavities as the gate is withdrawn.

Referring to FIG. 9, an ejector pin 1.15 is slidably mounted in the punch 16 and engaged by one arm of a lever 116 pivoted to the punch carrier at 117. The other arm 118 of this lever is adapted to be engaged by a vertical lever 119 pivoted at 120 (FIGS. 3 and 9) on the punch carrier. The upper arm 121 of this lever is adapted to be engaged by one end of a lever 122 pivoted at 123 to a bracket 76 carried by the gate 15. To the other end of the lever 122 is pivoted at 124 one end of a link 125, the other end of which is pivoted to one arm of a lever 126 pivoted at 127 to a bracket 128 carried by the gate. At the other end of the lever 126 is a cam follower roller 129 adapted to be engaged by a cam 13" mounted upon the end of a slide bar 131 slidably mounted upon the frame of the machine in brackets 132. The cam member 13!) may be slotted and a screw 133 passing through this slot adjustably secures the cam to the slide 131.

Similar structure is provided in connection with the punch 17 in which an ejecting pin 134 is slidably mounted and adapted to be actuated by a lever 135 similar in construction to the lever 116 previously described. The tail 136 of the lever 135 is adapted to be engaged by the lower end of a vertical lever 137 (FIG. 3) similar to the lever 121, while the upper end of the lever 137 will at the proper time be engaged by the adjacent end of the lever 13S pivoted at 139 to the bracket 7'6 (FIG. 9). The other end of the lever 13-8 is pivoted at 140 to a short link 14.1 seen in FIG. 9 behind the link 125, and the link 141 is in turn pivoted to a lever 142 also pivoted at 127 to the bracket 128 and carrying a cam follower roller 143 adapted to cooperate with a cam member 144 carried by the slide 145, which cam member and slide are similar to the cam member 130' and slide 131 previously described. The slide 145 is mounted on the frame of the machine in a bracket 146.

As is understood, when two punches are provided upon the gate as in the present instance, each is in position to cooperate with the die upon alternate strokes of the gate. Hence the ejector or knock-out pins 115 and'134 are only required to operate upon every alternate reciprocation of the gate, and means are provided to move the

slide members

131 and 145 at the proper time to move the

cam members

130 and 134 into and out of operative position. As the means for each of the slide members is identical with that of the other, one only need be shown and described as illustrated on FIG. 3, where the means for operating the slide 145 is shown. It will be understood that the operating means for the slide 131 stands directly to the rear.

As illustrated, the outer end of the slide 145 is pivoted at 147 to the upper end of a lever 148 pivoted to the frame at 149. This lever also comprises a lower arm 150 carrying a cam follower roller 151 to cooperate with a earn 152 on the side shaft 52, it being understood that the

arms

148 and 156 are rigid with each other. Thus rotation of the cam 152 will elfect movement of the lever arm 148 in a clockwise direction and thus move the slide 145 outwardly or to an inoperative position with respect to the cam follower 143.

In order to move the slide 145 and cam 144 in the other direction to its operative position, a second lever 153 is pivoted to the frame at 149. To this lever is secured a frangible breaker plate 154 against which bears an adjustable screw 155 threaded in a third arm 156 of the lever 148. Carried by the lever 153 is a follower roller 157 adapted to be engaged by the cam member 158 also carried by the shaft 52. It will be seen that rotation of the cam 158 will move the lever 153 in a counterclockwise direction and, therefore, move the slide 45 and cam 144 inwardly so as to be in position to engage the roller 143 at the proper time in the reciprocation of the gate. It may be noted that the lever 153 and the lever arm 150 abut along the line 160, being held in this relationship by pressure of the screw 155 against breaker plate 154.

The

cam members

152 and 158 are timed to move the

slides

131 and 145 to their operative positions at the proper time. As shown in FIG. 9, the punch 16 is in its operative position against the face of the die 66, and it will be noted that upon withdrawal of the gate to the right to withdraw the punch from the work, the cam follower 129 will engage the earn 130 and actuate the lever 116 and the ejecting pin 115 so that the work will not follow the retreating punch. When the gate again moves forwardly, the punch 17 will be shifted to a position opposite the die, and the tall 136 of the lever 135 will be moved to position to be engaged by the lever 138. Also the slide 145 will be moved inwardly to its operative position and the slide 131 withdrawn outwardly so that upon the next withdrawal of the gate the cam follower 143 will engage the cam 144 and actuate the ejecting pin 134 associated with the punch 17.

In FIGS. 11 and 12 of the drawing there is shown a modified form of connection between the punch shifter mechanism and the punch carrier. In this modification the bracket member which is formed integnally with the punch carrier 34 is provided with a guide member 162 similar in form to the guide member shown in FIG. 2. In this instance, however, the open end of the guided inem ber faces downwardly to receive the block 163 secured by a pin 164 to the upper end of the rocker 41 which in turn is pivoted at 42 to the frame as before. The guide member 162 may be provided with wear plates 165 between which the block 163 moves.

The link 43 which is actuated, as shown in FIG. 3, is pivoted to the rocker member at 44. Upon reciprocation of the link 43 the rocker 41 will be rocked about its pivot 42 to move the punch carrier 34 transversely of the frame from one position to another. At the same time the punch carrier being mounted upon the gate will be moved in a longitudinal direction which is permitted by sliding movement of the guide member 162 on the block 163.

It will be understood that ejector mechanism of the usual form will be provided for ejecting the workpieces or blanks from the dies.

While I have shown and described some preferred embodiments of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable i of modification and variation within the spirit of the invention and within the scope of the claims.

What I claim is:

1. Means for reciprocating the gate of a header or like apparatus having a frame upon which the gate is reci rocably mounted and a die on the frame with which cooperates a punch carried by the gate, said means comprising a crank shaft having a pair of spaced crank portions thereon, a double-armed pitman pivoted at its forward end to the gate and having spaced rearwardly extending arms, each of which is engaged with one of said cnank portions, and a plunger carrying said punch and slidably mounted on the frame in a position disposed between the arms of the pitman.

2. Means for reciprocating the gate of a header or like apparatus having a frame upon which the gate is reciprocably mounted and a die on the frame with which cooperates a punch carried by the gate, said means comprising a crank shaft having a pair of spaced crank portions thereon, a double-armed pitman having spaced rearwardly extending arms, each of which is connected to one of said crank portions, a pivot rod carried by the gate, the forward end of the pitman intermediate said arms being pivotally connected to said pivot rod, and a plunger carrying said punch and slidably mounted on the frame in a position disposed between the arms of the pitrnan.

3. Means for reciprocating the gate of a header or like apparatus having a frame upon which the gate is reciprocably mounted and a die on the frame with which cooperates a punch carried by the gate, said means comprising a crank shaft having a pair of spaced crank portions thereon, a double-armed pitman pivoted at its forward end to the gate and having spaced rearwardly extending arms, each of which is engaged with one of said crank portions, means for adjusting the position of the pivot of the pitman to the gate in the direction of movement of the latter, and a plunger carrying said punch and slidably mounted on the frame in a position disposed between the arms of the pitman.

4. A header or like mechanism having a frame, a die bed supported on the frame, a die carried by the die bed, a gate reoiprocably mounted on the frame for movement toward and from the die, means for reciprocating the gate, a punch carried by the gate having an opening therein, an ejecting pin movably mounted in said opening, and

means, actuated by reciprocation of the gate on the frame, for advancing said pin in timed relation to the reciprocation of the gate, said means including cam-actuate mechanism carried by the gate, a cam mounted on the frame to cooperate with said mechanism, and means for moving said cam into and out of position to engage said cam-actuated mechanism.

5. A header or like mechanism having a frame, a die bed supported on the frame, a die carried by the die bed, a gate reciprocably mounted on the frame for movement toward and from the die, means for reciprocating the gate, a punch carried by the gate having an opening therein, an ejecting pin movably mounted in said opening, means, actuated by reciprocation of the gate on the frame, for advancing said pin in timed relation to the reciprocation of the gate, said mechanism comprising a lever mounted on the gate to move said pin, and a cam member on the frame to engage and actuate said lever during reciprocation of the gate, said cam member being movable to and from a position to engage said lever, and means to move said member to and from such engaging position.

6. A header or like mechanism having a frame, a die bed supported on the frame, a die carried by the die bed, a gate reciprocably mounted on thc frame for movement toward and from the die, means for reciprocating the gate, a punch carried by the gate having an opening therein, an ejecting pin movably mounted in said opening, means for advancing said pin in timed relation to the reciprocation of the gate, said mechanism comprising a lever mounted on the gate to move said pin, a cam member on the frame to engage and actuate said lever during reciprocation of the gate, said cam member being movably mounted on the frame, and means for moving said cam member to an inoperative position.

7. A header or like mechanism having a frame, a die bed supported on the frame, a die carried by the die bed, a gate reciprocally mounted on the frame for movement toward and from the die, ntcans for reciprocating the gate, a punch carried by the gate having an opening therein, an ejecting pin movably mounted in said opening, means for advancing said pin in timed relation to the reciprocation of the gate, said mechanism comprising a lever mounted on the gate to move said pin, a cam member on the frame to engage and actuate said lever during reciprocation of the gate, said cam member being movably mounted on the frame, and rotatable cam means to move said cam member to a position in which it is inoperative to engage said lever.

8. A header or like mechanism having a frame, a die bed supported on the frame, a die carried by the die bed, a gate reciprocably mounted on the frame for movement toward and from the die, means for reciprocating the gate, a punch carried by the gate having an opening there in, an ejecting pin movably mounted in said opening, means for advancing said pin in timed relation to the reciprocation of the gate, said mechanism comprising a lever mounted on the gate to move said pin, a cam member on the frame to engage and actuate said lever during reciprocation of the gate, said cam member being movably mounted on the frame, and means operating in timed relation to the reciprocation of the gate to move said cam member in opposite directions, to, and from, a position in which it is operative to engage said lever.

9. A header or like mechanism having a frame, a die bed supported on the frame, a die carried by the die bed, a gate reciprocably mounted on the frame for movement toward and from the die, means for reciprocating the gate, a plurality of punches carried by the gate each having an opening therein, an ejecting pin movably mounted in each of said openings, means actuated by reciprocation of the gate on the frame for advancing each of said pins in timed relation to the reciprocation of the gate, said mechanism comprising levers pivotally mounted on the gate each operatively associated with one of said pins, a camactuated mechanism on the gate associated with each of said levers, cam members on the frame each associated with one of said cam-actuated mechanisms to engage and actuate the latter, said cams being movably mounted on the frame, and means to move each of said cams into and out of position to engage the associated cam-actuated mechanism.

References Cited in the file of this patent UNITED STATES PATENTS 617,484 Haskell Jan. 10, 1899 1,139,963 Gaess May 18, 1915 1,360,842 Wilcox Nov. 30, 1920 1,918,910 Hilgcland July 18, 1933 10 Wilcox Nov. 13, Buchanan June 1, Wilcox Sept. 22, Frothingham Dec. 1, Wilcox Dec. 1, Wilcox Dec. 15, Tomalis June 22, Wilcox Aug. 10, Wilcox May 6, Wright Mar. 12,

FOREIGN PATENTS Great Britain May 9, Germany Sept. 15,

Claims

1. MEANS FOR RECIPROCATING THE GATE OF A HEADER OR LIKE APPARATUS HAVING A FRAME UPON WHICH THE GATE IS RECIPROCABLY MOUNTED AND A DIE ON THE FRAME WITH WHICH COOPERATES A PUNCH CARRIED BY THE GATE, SAID MEANS COMPRISING A CRANK SHAFT HAVING A PAIR OF SPACED CRANK PORTIONS THEREON, A DOUBLE-ARMED PITMAN PIVOTED AT ITS FORWARD END TO THE GATE AND HAVING SPACED REARWARDLY EXTENDING ARMS, EACH OF WHICH IS ENGAGED WITH ONE OF SAID CRANK PORTIONS, AND A PLUNGER CARRYING SAID PUNCH AND SLIDABLY MOUNTED ON THE FRAME IN A POSITION DISPOSED BETWEEN THE ARMS OF THE PITMAN.