Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1990-05-31
1991-09-24
Coles, Sr., Edward L.
Communications: electrical
Condition responsive indicating system
Specific condition
70456R, 200 6166, G08B 1314
Patent
active
050517244
ABSTRACT:
A key security device includes a rigid housing with an internal latching device to releasably secure a key within an open keyway formed in the housing. Circuitry is provided along with the latching device to supply an audible or otherwise detectable signal that is initiated following removal of the key and passage of a predetermined timed interval following removal of the key from the housing. Circuitry within the housing responds to insertion and removal of the key to produce an indentifiable alert signal after a determined time interval that may be initiated in response to removal of the key from the keyway. The time interval is reset and the alert signal is cancelled as the key is received in the keyway. An override is provided for the timer and may be operated to selectively extend the time interval and thereby delay operation of the alarm.
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Maestretti G. Jeff
Morrow Carl R.
Coles Sr. Edward L.
Maestretti G. Jeff
Morrow Carl R.
Swarthout Brent A.
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