Annunciator system

Details Annunciator system Annunciator system

1995-05-15

1998-11-10

Swarthout, Brent A.

Communications: electrical

Condition responsive indicating system

Specific condition

34028611, 340296, 340302, 70DIG49, E05B 4506

Patent

active

058350144

ABSTRACT:
Protection of manual override lock and key systems for an electronic security system is provided by an annunciator system which is activated when access to a manual override keyhole is attempted.

REFERENCES:
patent: 3685036 (1972-08-01), Torok
patent: 4333074 (1982-06-01), Sutherland et al.
patent: 4540269 (1985-09-01), Nishiyama
patent: 4864279 (1989-09-01), Cooper
patent: 5168258 (1992-12-01), Radke
patent: 5191314 (1993-03-01), Ackerman et al.
patent: 5461360 (1995-10-01), Guim et al.
Clegg Line Catalog, .COPYRGT. 1993 "Telephone Ringing Business Card Holders".

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