Title:
System for signalling unauthorized displacement of an article
United States Patent 3247502
Inventors:
Klaus, Eberts
Publication Date:
04/19/1966
Export Citation:
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Assignee:
Sonnenschein, Accumulatoren
Primary Class:
340/539.11
Other Classes:
200/52R, 335/206, 340/333, 340/539.31, 340/547, 340/568.8
International Classes:
G08B13/08; G08B13/14; H01H36/00; G08B13/02; G08B13/14; H01H36/00
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US Patent References:
3192517Burglar alarm
3161742Magnetic intruder and fire deterctor
3155954Automatic sensitivity control for sound actuated detection and alarm systems
3135953Lamp illuminating network
3114905Alarm system
3056951Safe alarm system
2943308Protective alarm system
2905762Fire and burglar alarm system
2899674N/A
2877361Burglar alarm system
2766358Hold-up alarm signal system
2754498Alarm device for suspended articles
Foreign References:
DE1108111B
GB669820A
GB770958A