Tamper resistant electronic lock and method of using same

Details Tamper resistant electronic lock and method of using same Tamper resistant electronic lock and method of using same

1997-03-24

1999-09-21

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

235 382, 361704, 70286, G06F 704, G07B 1500, H05K 720, E05B 3700

Patent

active

059559608

ABSTRACT:
A tamper resistant electronic lock includes an internal tamper protection circuit and monitoring arrangement that thermally couples a transient voltage suppressor and a resettable fuse of the protection circuit to allow thermal feedback or interaction between the components and to substantially prevent overheating due to the application of overvoltage or out of tolerance current condition applied in an attempt to open the lock for unauthorized access purposes. A thermocouple is used to thermally couple the transient voltage suppressor and the resettable fuse, which acts to limit the current to a safe level when the transient voltage suppressor heats up upon application of the overvoltage or out of tolerance current conditions.

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