EP 0028933 A3 19810603 - SURVEILLANCE SYSTEM
Title (en)
SURVEILLANCE SYSTEM
Publication
Application
Priority
GB 7938921 A 19791109
Abstract (en)
[origin: EP0028933A2] A surveillance system for detecting intruders in a protected area or property comprises unmanned closed circuit television apparatus inside the area or property with a transmitter (5) for transmitting video signals via a signal link to a mobile unit (9,10,11,12) positioned temporarily adjacent the area or property. The transmission of signals from the fixed apparatus can only be activated by a coded access signal fed via the link from a store (11) in the mobile unit to a control unit (6) in the fixed apparatus. A recording device or store (4) records signals from cameras (1) when triggered by a movement detector (2) or other sensors (7). The mobile unit includes means for causing recorded video signals in the store (4) to be transmitted via the link to the display unit (10).
IPC 1-7
IPC 8 full level
G07C 1/20 (2006.01); G08B 13/00 (2006.01); G08B 13/196 (2006.01); G08B 15/00 (2006.01)
CPC (source: EP)
G07C 1/20 (2013.01); G08B 13/00 (2013.01); G08B 13/19645 (2013.01); G08B 13/1966 (2013.01); G08B 13/19695 (2013.01)
Citation (search report)
- [A] US 4037250 A 19770719 - MCGAHAN EVERETT G, et al
- [A] AU 495097 B2 19750515
- [A] US 4081830 A 19780328 - MICK PETER, et al
Designated contracting state (EPC)
BE DE FR NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 80304009 A 19801110