(19)
(11) EP 0 679 859 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.07.1996 Bulletin 1996/27

(43) Date of publication A2:
02.11.1995 Bulletin 1995/44

(21) Application number: 95302104.5

(22) Date of filing: 29.03.1995
(51) International Patent Classification (IPC)6: F42B 3/13, F42B 3/188
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 29.03.1994 US 219588
23.03.1995 US 410606

(71) Applicant: HALLIBURTON COMPANY
Dallas, Texas 75381-9052 (US)

(72) Inventor:
  • Motley, Jerry D.
    Arlington, Texas 76017 (US)

(74) Representative: Wain, Christopher Paul et al
A.A. THORNTON & CO. Northumberland House 303-306 High Holborn
London WC1V 7LE
London WC1V 7LE (GB)

   


(54) Electrical detonator


(57) An electrical detonator has a case (12) containing an explosive charge (13), a semiconductor bridge (16) positioned adjacent one end of the explosive charge (13) and electrically connected to a spark gap (18) and, in some embodiments, a capacitor and a bleeder resistor. A pair of electrically conductive wires (20,22) are connected to the spark gap (18) and semiconductor bridge (16) to provide a means for passing an electrical charge to the semiconductor bridge (16). The detonator also may include an rf attenuator (24), such as a ferrite bead. through which the electrically conductive wires (20,22) pass.






Search report