Title:
System for signalling unauthorized displacement of an article
United States Patent 3247502
US Patent References:
Alarm device for suspended articles
- - 2754498

Hold-up alarm signal system
- - 2766358

Burglar alarm system
- - 2877361

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- - 2899674

Fire and burglar alarm system
- - 2905762


Inventors:
Klaus, Eberts
Publication Date:
04/19/1966
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Assignee:
Sonnenschein, Accumulatoren
Primary Class:
340/539.110
Other Classes:
200/52R, 340/333, 340/547, 340/568.800, 340/539.310, 335/206
International Classes:
G08B13/08; G08B13/14; H01H36/00; G08B13/02
US Patent References:
2943308Protective alarm system
3056951Safe alarm system
3114905Alarm system
3135953Lamp illuminating network
3155954Automatic sensitivity control for sound actuated detection and alarm systems
3161742Magnetic intruder and fire deterctor
3192517Burglar alarm
Foreign References:
DE1108111B
GB669820A
GB770958A