Conveyors: power-driven – Conveyor section – Endless conveyor
Patent
1976-02-06
1978-03-21
Love, John J.
Conveyors: power-driven
Conveyor section
Endless conveyor
198816, 226 25, 226 44, B65G 2900
Patent
active
040798348
ABSTRACT:
An endless belt conveyor provided with a tensioning mechanism which includes an idler in operative contact with the return run, the idler being supported by a movable carriage. Tension adjusting means are provided which may move the carriage and idler in either a first direction to increase the tension on the endless belt or in a second direction to reduce the tension for purposes of resplicing the belt. The tensioning mechanism further includes control means which senses the tension on the return run and which may initiate movement of the carriage in either direction. The means for sensing the tension includes a normally open limit switch which is adapted to close when the tension on the return run falls below a predetermined value. The means which may initiate movement of the carriage in the first direction include first means operable to energize the tension adjusting means a suitable time interval after the normally open limit switch has closed, and additional means which prevents operation of the tension adjusting means for an initial time interval during start-up of the conveyor. The control means further includes manually operable normally open contact means which, when closed, will permit the operation of the tension adjusting means to move the idler in the second direction. Selector means are provided which permit the operation of the tension adjusting means to move the idler in the first direction only when the drive for the conveyor is operative, said selector means further permitting operation of the tension adjusting means to move the idler in the second direction only when the conveyor drive means is inoperative. Limit switches are provided contactable by the carriage to prevent the carriage from moving too far in either its first direction or its second direction.
REFERENCES:
patent: 2244033 (1941-06-01), Trempe
patent: 2782902 (1957-02-01), Sloane
patent: 2846054 (1958-08-01), Bergmann
patent: 3027993 (1962-04-01), Houben
patent: 3045360 (1962-07-01), Alexeff et al.
patent: 3217863 (1965-11-01), Duncan
patent: 3675482 (1972-07-01), Hewitt
patent: 3923151 (1975-12-01), Weber
Fletcher, Jr. Stacy G.
McCorkel Joel D.
Aggregates Equipment, Inc.
Love John J.
Thompson John C.
Watts Douglas D.
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