(19)
(11) EP 0 395 596 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.03.1991 Bulletin 1991/12

(43) Date of publication A2:
31.10.1990 Bulletin 1990/44

(21) Application number: 90830168.2

(22) Date of filing: 17.04.1990
(51) International Patent Classification (IPC)5: E05B 49/00, B60R 25/00
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 28.04.1989 IT 6731589

(71) Applicant: AUTONIX S.R.L.
I-10095 Grugliasco (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) An improved anti-theft system, particularly for motor vehicles


    (57) The improvements relate to:
    - the provision of a transmitter (9) in the unit (2) installed in the vehicle for sending to the control unit (3) carried by the user a signal which confirms the activation of the system and can be stored by the control unit (3);
    - the alternating use of two different messages for activating and deactivating the system so that any recording of the activation message by a third party with a view to its possible use as a deactivation message is rendered useless, and
    - the temporary shut-down of the activated system upon receipt of successive different messages approximating to the valid deactivation message so as to prevent its possible deactivation.







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