(19)
(11) EP 0 028 933 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.06.1981 Bulletin 1981/22

(43) Date of publication A2:
20.05.1981 Bulletin 1981/20

(21) Application number: 80304009

(22) Date of filing: 10.11.1980
(84) Designated Contracting States:
BE DE FR NL SE

(30) Priority: 09.11.1979 GB 7938921

(71) Applicant: Ascotts Ltd.
 ()

(72) Inventors:
  • Wiseman, Barry Leonard
     ()
  • Gate, Christopher David
     ()
  • Thomson, Edward Collier
     ()

   


(54) Surveillance system


(57) 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).






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