Patent GB-910682-A (GB)
Title: Improvements in or relating to conveyors
IPC: B65G47/00
Filed: 1959-03-04
Abstract: 910,682. Conveyer systems. LINGG, G. March 4, 1959, No. 7455/59. Class 104 (2). In an apparatus in which load-carrying bogeys 9, 9a, 9b, 9c, Fig. 1, are propelled along a track 8 by an endless conveyer chain 1, an abutment 4 on each bogey engages a member 2d supported from the chain 1, the driving member 2d or the abutment 4 being movable from the position of engagement with the abutment 4 or driving members 2d to a position of disengagement by a lever 3 connected to the driving member or abutment, the lever 3 being moved either by contacting a removable stop 7 or surface 5 on the preceding load-carrying bogey, either the driving member 2d or the abutment 4 being urged by gravity to its driving position or remaining in its disengaged position until the stop 7 or surface 5 is removed, the arrangement being such that where more than one load-carrying bogey is moved the lever 3 of the first loadcarrying bogey 9 contacts the removable stop 7 and the lever 3 of each succeeding bogey 9a, 9b, 9c contact the surface 5 of the preceding load-carrying bogey. In the arrangement shown in Fig. 1, the rod 3 is connected to a pawl 2c pivotally mounted on a bar 2 connected to the chain 1 by members 2a, 2b. The bar 3 engages a crank member 3a carried on the pawl 2d, also pivotally mounted on the bar 2d, so that when the pawl 2c engages and is pivoted upwardly by the movable stop 7 or the surface 5, the pawl 2d is pivoted upwardly out of driving engagement with the abutment 4. The driving chain 1 may be arranged above or to the side of the bogey track 8, Figs. 2 and 3 (not shown). In an alternative embodiment shown in Fig. 4, the pawls 2c, 2d are pivotally mounted on the bar 2 but are not interconnected by the bar 3 and the cranked member 3a. The abutment 4 is carried on a lever 11 pivotally mounted on bar 6 of the load-carrying bogeys 9, 9a, 9b. In this embodiment the lever is gravitationally biased to hold the abutment 4 in a position of driving engagement with the pawl 2c, 2d and when the front end of the lever 11 engages a movable stop 7 or the bar 6 of the preceding bogey the lever 11 is pivoted to move the abutment 4 downwards out of the driving position. In a further embodiment shown in Fig. 5 and 5a, the pawl 4 is connected to one end of a linkage system 12. The abutment 4, shown at the right-hand side of Figs. 5, 5a, is held in the driving position by a portion 13a of a gravity actuated member 13 engaging one end of the lever system 12. The member 13 is also provided with an arm 13b which arm 13b on striking the stop 7 or the end of the bar 6 rotates the member 13 to move the portion 13a away from the lever system 12, thus allowing the abutment 4 to move out of the driving position with the pivoted levers 2c, 2d. In yet a further embodiment shown in Fig. 6, the driving abutment 16 is carried by the chain 1 and the driving pawls 18, 20 are pivotally mounted on the bar 6 of the load-carrying bogies 9. The pawl 20 is gravity biased to its operative position by a weight 21. The pawl 18 is gravity biased to the operative position by a weight 19 and is connected by a link 15 to a lever 17 pivotally mounted on the bar 6. The lever 17 is normally vertical but on contact with the stop 7 or the rear end 5 of a bogey is rotated to move the pawl 18 to the inoperative position. In a further embodiment, Fig. 8 (not shown), the driving chain runs beneath load-carrying trolleys arranged to run over a floor and the driving arrangement is similar to that described with regard to the embodiment shown in Fig. 6.