Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-06-03
1992-12-01
Ng, Jin F.
Communications: electrical
Condition responsive indicating system
Specific condition
70 54, 70DIG49, 70DIG56, 340545, E05B 4506, G08B 1308
Patent
active
051682583
ABSTRACT:
A protective device for a padlock as typically used on the cargo doors of a trailer portion of a truck/trailer combination. Particularly, the device is intended to protect the lock from the environment and to provide a warning of unauthorized access. The preferred embodiment includes a base which is fastened to the door and surrounds the keeper of the lock assembly, a cover pivotally mounted to the base and enclosing the lock, a switch mounted to the cover for detecting displacement of the cover from its closed position and an audible alarm responsive to the switch for emitting a warning signal.
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Mullen Jr. Thomas J.
Ng Jin F.
Richardson H. Albert
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