GB1419775A - Electrical initiators - Google Patents

Electrical initiators

Info

Publication number
GB1419775A
GB1419775A GB4588872A GB4588872A GB1419775A GB 1419775 A GB1419775 A GB 1419775A GB 4588872 A GB4588872 A GB 4588872A GB 4588872 A GB4588872 A GB 4588872A GB 1419775 A GB1419775 A GB 1419775A
Authority
GB
United Kingdom
Prior art keywords
bridge circuit
electrical
initiator
contact
oct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4588872A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB4588872A priority Critical patent/GB1419775A/en
Publication of GB1419775A publication Critical patent/GB1419775A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/12—Primers; Detonators electric

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)

Abstract

1419775 Electrical initiators DEFENCE SECRETARY OF STATE FOR 4 Oct 1973 [5 Oct 1972] 45888/72 Heading F3A An electrical initiator resistant to inadvertent actuation by RF fields comprises a bridge circuit in which a plurality of lengths 22, Fig. 2, of incandescent conductor are interconnected by low resistance elements 23 which act as heat sinks for absorbing heat generated in the lengths 22 by the passage of RF-induced currents. The bridge circuit is formed as a printed circuit and has a heat resistant base 7, Fig. 1, through which a rivet 5 extends from a central electrical contact 4 to make electrical contact with a central contact 8 of the bridge circuit. Another contact 9 of the bridge circuit is in electrical connection with the casing 12 of the initiator. An 0-ring provides a seal for the initiator in the base of a cartridge 1.
GB4588872A 1972-10-05 1972-10-05 Electrical initiators Expired GB1419775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4588872A GB1419775A (en) 1972-10-05 1972-10-05 Electrical initiators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4588872A GB1419775A (en) 1972-10-05 1972-10-05 Electrical initiators

Publications (1)

Publication Number Publication Date
GB1419775A true GB1419775A (en) 1975-12-31

Family

ID=10438984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4588872A Expired GB1419775A (en) 1972-10-05 1972-10-05 Electrical initiators

Country Status (1)

Country Link
GB (1) GB1419775A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123122A (en) * 1982-01-08 1984-01-25 Hunting Eng Ltd Explosive devices
EP0150823A2 (en) * 1984-01-31 1985-08-07 Dynamit Nobel Aktiengesellschaft Electric ignitor
US5204491A (en) * 1990-11-27 1993-04-20 Thomson -- Brandt Armements Pyrotechnic detonator using coaxial connections
FR2684176A1 (en) * 1991-11-21 1993-05-28 Giat Ind Sa Closure base for a combustible case
FR2823562A1 (en) * 2001-04-12 2002-10-18 Radio Concept Dev Et Comm Equipment for controlling ignition of fireworks, comprises resistance and ignitable material in envelope with resistor leads connected as a loop within container to carry externally induced current
EP2056061A1 (en) * 2007-10-30 2009-05-06 Autoliv Development AB Electro-pyrotechnic initiator with resistive heating element

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123122A (en) * 1982-01-08 1984-01-25 Hunting Eng Ltd Explosive devices
EP0150823A2 (en) * 1984-01-31 1985-08-07 Dynamit Nobel Aktiengesellschaft Electric ignitor
EP0150823A3 (en) * 1984-01-31 1986-07-23 Dynamit Nobel Aktiengesellschaft Electric ignitor
US4690056A (en) * 1984-01-31 1987-09-01 Dynamit Nobel Aktiengesellschaft Electric detonator device
US5204491A (en) * 1990-11-27 1993-04-20 Thomson -- Brandt Armements Pyrotechnic detonator using coaxial connections
FR2684176A1 (en) * 1991-11-21 1993-05-28 Giat Ind Sa Closure base for a combustible case
FR2823562A1 (en) * 2001-04-12 2002-10-18 Radio Concept Dev Et Comm Equipment for controlling ignition of fireworks, comprises resistance and ignitable material in envelope with resistor leads connected as a loop within container to carry externally induced current
EP2056061A1 (en) * 2007-10-30 2009-05-06 Autoliv Development AB Electro-pyrotechnic initiator with resistive heating element
JP2009109181A (en) * 2007-10-30 2009-05-21 Autoliv Development Ab Electric ignition starter having heating resistive element

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19931003