Title:
Alarm system
United States Patent 3257653


Inventors:
Mccorkindale, Lawrence W.
Application Number:
US28950563A
Publication Date:
06/21/1966
Filing Date:
06/21/1963
Assignee:
BENRUS WATCH COMPANY INC
Primary Class:
Other Classes:
327/1, 340/529, 340/539.1, 340/539.17, 341/176
International Classes:
G08B19/00; G08B23/00; G08B25/10; G08B29/18
View Patent Images:
US Patent References:
3208061Protective alarm system for metal-enclosed apparatus1965-09-21
3149317Radio alarm1964-09-15
2979706Radio warning system1961-04-11
2924724Time delay circuits1960-02-09
2899674N/A1959-08-11
2892101Transistor time delay circuit1959-06-23
2766358Hold-up alarm signal system1956-10-09
2744194Alert device for attaching to radio receiving sets1956-05-01
1986026Signal transmitter1935-01-01