(19)
(11) EP 0 508 966 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.09.1994 Bulletin 1994/37

(43) Date of publication A2:
14.10.1992 Bulletin 1992/42

(21) Application number: 92830173.8

(22) Date of filing: 08.04.1992
(51) International Patent Classification (IPC)5: G08B 21/00, G08B 29/14
(84) Designated Contracting States:
DE ES FR GB IT

(30) Priority: 09.04.1991 IT BO910109

(71) Applicant: BEGHELLI S.R.L.
I-40050 Monteveglio, Bologna (IT)

(72) Inventor:
  • Beghelli, Gian Pietro
    I-40050 Monteveglio (Bologna) (IT)

(74) Representative: Coppi, Cecilia 
Via Oblach No. 1
40141 Bologna
40141 Bologna (IT)


(56) References cited: : 
   
       


    (54) Toxic gas detection


    (57) Circuit means is disclosed for performing the functions of the self-monitoring and diagnosis of means for the detection of toxic and/or harmful and/or explosive gases, checking the operating condition and efficiency of the various constituent parts, either continuously or at specified intervals, or under manual control.





    Search report