(19)
(11) EP 0 458 178 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.10.1992 Bulletin 1992/43

(43) Date of publication A2:
27.11.1991 Bulletin 1991/48

(21) Application number: 91107842.6

(22) Date of filing: 15.05.1991
(51) International Patent Classification (IPC)5: F42D 1/05, F42C 13/06
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU NL SE

(30) Priority: 21.05.1990 US 525929

(71) Applicant: ALLIANT TECHSYSTEMS INC.
Edina, Minnesota 55436 (US)

(72) Inventors:
  • Haglund, Steven A. 14310 Mount Terrace
    Minnesota 55345 (US)
  • Kurschner, Dennis L.
    Minnesota 55343 (US)
  • Paulson, Kenneth W.
    Eden Prairie Minnesota 55438 (US)

(74) Representative: Altenburg, Udo, Dipl.-Phys. et al
Patent- und Rechtsanwälte, Bardehle . Pagenberg . Dost . Altenburg . Frohwitter . Geissler & Partner, Galileiplatz 1
81679 München
81679 München (DE)


(56) References cited: : 
   
       


    (54) Autonomous acoustic detonation device


    (57) An autonomous detonation device comprising an acoustic sensor, a logic circuit, and an output circuit. The invention is capable of discriminating the acoustic signal of an explosion of a primary charge such that it will detonate an explosive shortly thereafter. The invention further incorporates a delay system for safety purposes.






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