Title:
System for signalling unauthorized displacement of an article
United States Patent 3247502


Inventors:
Klaus, Eberts
Application Number:
US31761863A
Publication Date:
04/19/1966
Filing Date:
10/21/1963
Assignee:
Sonnenschein, Accumulatoren
Primary Class:
Other Classes:
200/52R, 335/206, 340/333, 340/539.31, 340/547, 340/568.8
International Classes:
G08B13/08; G08B13/14; H01H36/00
View Patent Images:
US Patent References:
3192517Burglar alarm1965-06-29
3161742Magnetic intruder and fire deterctor1964-12-15
3155954Automatic sensitivity control for sound actuated detection and alarm systems1964-11-03
3135953Lamp illuminating network1964-06-02
3114905Alarm system1963-12-17
3056951Safe alarm system1962-10-02
2943308Protective alarm system1960-06-28
2905762Fire and burglar alarm system1959-09-22
2899674N/A1959-08-11
2877361Burglar alarm system1959-03-10
2766358Hold-up alarm signal system1956-10-09
2754498Alarm device for suspended articles1956-07-10
Foreign References:
DE1108111B1961-05-31
GB669820A1952-04-09
GB770958A1957-03-27