Patent GB-631985-A (GB)
Title: Feeding mechanism for shaker or jigging conveyers
IPC: B65G65/00
Filed: 1947-07-22
Abstract: 631,985. Jigger conveyers. GOODMAN MANUFACTURING CO. July 22, 1947, No. 19653. Convention date, Oct. 19, 1939. [Class 78 (i)] A feeding mechanism for shaker or jigging conveyers includes two trough sections one of which is extensible with respect to the other, a carrier member with gripping means and two links pivotally connected between one of the trough sections and opposite ends of the carrier member one of the links being adapted to engage the gripping means, with the other trough section on certain strokes of the conveyer for feeding the trough section in one direction, and the other of the limbs being adapted to engage the gripping means with the other trough section on certain strokes of the conveyer for feeding the trough section in an opposite direction and individual control means for rendering either of the links inoperative. A reciprocating trough section 10 is connected to a shaker conveyer. An extensible trough section 11 with shovel 12 is supported by legs 14 on a shoe 13. The trough section 10 is supported on the section 11 by rollers 17 mounted on opposite sides of a bracket 18 connected to the section 10. The lower rollers 17 engage the underside of bearing plates 16 on section 11 and the upper rollers prevent upward movement of the section 11. A bearing bar 20 is secured to the underneath of section 11 and is gripped by friction grip blocks 21 and 22 mounted on a carrier member 23. The grip blocks have bosses 25 and 33 adapted to engage arcuately formed surfaces in the ends of blocks mounted in the member 23 and slidable in guides. A set screw 30 at one end engages the end of the block 27 for adjustment purposes. A pair of links 35 and 36 are pivotally connected to the member 23 to engage the grip blocks 21 and 22 with the bearing bar 20 during certain strokes of the conveyer to extend or retract the section 11. The link 35 yields when the shovel engages an obstruction. The link consists of a bolt 37 slidably extending through a yoke 38 pivoted to an arm 39 on the member 23. A compression spring 40 encircles the bolt between the yoke and a collar 41. Adjustment of the spring is effected by a nut 42. An arcuate link 45 is pivoted at one end of the bolt to a yoke 44. The other end of the link is pivoted to a rocking lever 46 mounted on a rock shaft 49 on brackets 18 and 47. The rocking lever 46 is linked with a hand lever 53. The link 36 includes a yoke 56 threaded on a member 57 and pivoted to the carrier member 23. A yoke 59 threaded on the opposite end is pivoted to an arcuate link 60 connected to a lever arm 61 and hand lever 62 mounted on a shaft 64 in a bracket 63 secured to the bracket 18. The member 23 is urged to a forwardly inclined position by links 65 and 66 connected between the bracket 18 and member 23, one link being used when feeding in one direction, the other when feeding in the opposite direction. The link 65 is connected between the ear 39 of the carrier member 23 and a bracket 67 projecting from the bracket 18 and includes a compression spring 68 encircling a threaded rod 69 and interposed between a collar 70 and a block 71 through which the bolt slidably extends. The spring is adjusted by a nut 72. The link 66 includes a rod 76 pivoted at one end to the carrier member 23, the other end slidably extends through a block 77 pivoted on a bracket 78 projecting from the bracket 18. A spring 79 abuts block 77 and is abutted by a collar 81. The spring is adjusted by a nut 83. The links in the normal position hold the carrier member in an inclined position and the grips in contact with the bearing bar so that the extensible member 11 reciprocates with the section 10. To extend the section 11, the lever 62 is swung outwardly, the link 36 is moved to an inoperativeposition. The link 35 exerts a forward pull on the carrier member 23 on the forward stroke of the conveyer against the pull of the links 66 and the grip blocks engage the bearing bar to move the section 10 forwardly with the section 10. On the return stroke, the link 35 exerts a pull to disengage the grip blocks from the bearing member. To retract the section 11, the hand lever 53 is swung outwardly to move the link 35 to an inoperative position. The pull of the link 36 on the forward stroke disengages the grip blocks from the bearing bar upon the return stroke, the link 36 exerts a pulling force to engage the grip blocks with the bearing bar and retract the section 11. When both levers 53 and 62 are moved outwardly the links 35 and 36 are both inoperative. The links 65 and 66 allow the grip blocks to be disengaged from the bearing bar and the section 10 moves along the extensible section 11.