(19)
(11) EP 0 653 737 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.01.1996 Bulletin 1996/05

(43) Date of publication A2:
17.05.1995 Bulletin 1995/20

(21) Application number: 94307933.5

(22) Date of filing: 27.10.1994
(51) International Patent Classification (IPC)6: G08B 25/10, G08B 21/00
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 15.11.1993 ZA 938511
29.12.1993 ZA 939755

(71) Applicant: Casey, Brian William
Randburg (ZA)

(72) Inventor:
  • Casey, Brian William
    Randburg (ZA)

(74) Representative: Pacitti, Pierpaolo A.M.E. et al
Murgitroyd and Company 373 Scotland Street
Glasgow G5 8QA
Glasgow G5 8QA (GB)


(56) References cited: : 
   
       


    (54) A detection device


    (57) A detection device 10 includes a transmitter 14 which transmits a transmitted signal 16 of a first characteristic and, upon the occurrence of a predetermined event, causes a change in the characteristic of the transmitted signal 16. A receiver 18 is arranged remote from the transmitter 14, the receiver 18 being responsive to the transmitter 14. A discernible alarm 20 is connected to the receiver 18 to be activated by the receiver 18 when the receiver 18 receives the transmitted signal of changed characteristic or the receiver 18 fails to receive the transmitted signal 16.






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