Conveyors: power-driven – With alarm or indicator – Means responsive to conveyor movement to indicate speed or...
Patent
1993-03-31
1994-08-16
Bidwell, James R.
Conveyors: power-driven
With alarm or indicator
Means responsive to conveyor movement to indicate speed or...
1985021, 198718, B65G 4300
Patent
active
053378857
ABSTRACT:
A travel monitor for a rectangular sludge conveyor having a plurality of scrapers attached to and driven by a pair of chains, each of which is formed in a closed loop having an upper run. A pair of detector sprockets independently engage and are driven by the upper runs. Switches positioned adjacent the sprockets create a series of pulses in response to their rotation. The phase difference between the series of pulses resulting from rotation of the sprockets is detected, and a misalignment alarm is activated when the phase difference exceeds a predetermined amount.
REFERENCES:
patent: 4809576 (1989-03-01), Bakermans et al.
patent: 4914964 (1990-04-01), Speiser
patent: 5011359 (1991-04-01), McDonald
patent: 5079729 (1992-01-01), Nowakowski
Christian Donald J.
Lodholz John C.
Mills Robert L.
Orlando Franklin P.
Sarat-Chandra Rangasami
Bidwell James R.
FMC Corporation
Kamp Ronald C.
Megley R. B.
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