Tumbler lock alarm construction

Details Tumbler lock alarm construction Tumbler lock alarm construction

1977-02-24

1978-09-19

Wolfe, Robert L.

Locks

Parts, attachments, accessories and adjuncts

Condition indicators

70DIG49, 70DIG50, E05B 1700

Patent

active

041144120

ABSTRACT:
The invention provides a tamper-proof pin tumbler lock construction cooperative with an alarm means and protective against unauthorized picking or core drilling activities on the lock while securing normal key opening and closing procecures therefor. The construction energizes an alarm if the unauthorized activities exceed a predetermined time limit required for normal key opening and closing procedures.

REFERENCES:
patent: 2318908 (1943-05-01), Welch
patent: 3587081 (1971-06-01), Hawkins
patent: 3878700 (1975-04-01), Lopez

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