(19)
(11) EP 0 255 812 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.10.1989 Bulletin 1989/42

(43) Date of publication A2:
10.02.1988 Bulletin 1988/06

(21) Application number: 87830294.2

(22) Date of filing: 29.07.1987
(51) International Patent Classification (IPC)4: G08B 13/18
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR LI LU NL SE

(30) Priority: 08.08.1986 IT 6764986

(71) Applicant: ELKRON S.p.A.
I-10141 Torino (IT)

(72) Inventor:
  • Bianco, Luigi
    I-10141 Torino (IT)

(74) Representative: Bosotti, Luciano et al
c/o JACOBACCI & PERANI S.p.A. Corso Regio Parco, 27
10152 Torino
10152 Torino (IT)


(56) References cited: : 
   
       


    (54) Monitoring device with infrared and radio-frequency sensor components


    (57) The device, designed for use in intruder alarm systems, uses a combination of an infrared sensor (11) and a radio-frequency sensor (2, 3) whose operating frequency is substantially in the UHF band.







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