Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1979-05-18
1981-01-13
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
361179, 361192, 294 81SF, B66C 100, H01H 4700
Patent
active
042452716
ABSTRACT:
In a crane system for moving a cargo container, an improved system for maintaining the container in a locked relation against a spreader assembly having a plurality of proximity sensors which initially control the ability of said system to lock the container to said spreader, includes a relay connected so as to be actuated by the initial coupling of power to the locking solenoid, such relay acting to maintain power to the locking solenoid even if one or more of the proximity sensors subsequently changes state. The system further includes another relay operatively connected to restore the system to an operative condition after a loss of power has been experienced, such relay functioning to restore power to the locking or unlocking portion of the system, once power has been reestablished, independent of the state of the proximity sensors.
REFERENCES:
patent: 3858728 (1975-01-01), Fathauer
patent: 3885676 (1975-05-01), Wilson et al.
patent: 3888536 (1975-06-01), Durenec
Moose Jr. Harry E.
Schroeder L. C.
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