GB2018959A - Electric Safety Squib - Google Patents

Electric Safety Squib

Info

Publication number
GB2018959A
GB2018959A GB7911463A GB7911463A GB2018959A GB 2018959 A GB2018959 A GB 2018959A GB 7911463 A GB7911463 A GB 7911463A GB 7911463 A GB7911463 A GB 7911463A GB 2018959 A GB2018959 A GB 2018959A
Authority
GB
United Kingdom
Prior art keywords
conductors
chamber
pyrotechnic material
wall
terminals
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.)
Granted
Application number
GB7911463A
Other versions
GB2018959B (en
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.)
ATK Launch Systems LLC
Original Assignee
Thiokol Corp
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 Thiokol Corp filed Critical Thiokol Corp
Publication of GB2018959A publication Critical patent/GB2018959A/en
Application granted granted Critical
Publication of GB2018959B publication Critical patent/GB2018959B/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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Abstract

An electric safety squib having a grounded outer case 5 and a pair of normally ungrounded terminals 34 includes a closed thermally and electrically conductive chamber 14 filed with pyrotechnic material 15. An electrical resistance wire 16 is embedded in the pyrotechnic material for controlled ignition thereof. Separate conductors 8, 9 extend from the terminals 34 to opposite ends of the resistance wire 16 via a resistive header 27 and a chamber 25 holding ferrite beads 30, whereby energy of radio-frequency and electrostatic origin extraneously induced in the terminals and conductors is dissipated into the bulk of the conductors, the resistive header and ferrite beads. The arrangement features the connection of one of the conductors 8 directly to the chamber wall 13, the insulation of the other conductor from the wall 10 at 12, and the spacing of the chamber wall with respect to the outer case 5 to provide a measured spark gap therebetween whereby radio-frequency and electrostatic energy above a threshold value that may reach the resistance wire 16 is conducted by the wall 10, 13 of the chamber around and away from the pyrotechnic material and is discharged through the spark gap, thereby preventing such energy from igniting the pyrotechnic material. <IMAGE>
GB7911463A 1978-04-03 1979-04-02 Electric safeti squib Expired GB2018959B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89272578A 1978-04-03 1978-04-03
US90914378A 1978-06-15 1978-06-15

Publications (2)

Publication Number Publication Date
GB2018959A true GB2018959A (en) 1979-10-24
GB2018959B GB2018959B (en) 1982-06-16

Family

ID=27129027

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7911463A Expired GB2018959B (en) 1978-04-03 1979-04-02 Electric safeti squib

Country Status (6)

Country Link
JP (1) JPS54151109A (en)
DE (1) DE2913231A1 (en)
FR (1) FR2422138A1 (en)
GB (1) GB2018959B (en)
IT (1) IT1116470B (en)
SE (1) SE445489B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2464454A1 (en) * 1979-09-03 1981-03-06 Bofors Ab ELECTRICAL IGNITION PROTECT AGAINST ACCIDENTAL RELEASE
EP0029671A1 (en) * 1979-11-20 1981-06-03 Ici Americas Inc. Electrostatic safety element for an electric initiator
EP0029672A1 (en) * 1979-11-20 1981-06-03 Ici Americas Inc. Electric safety initiator
EP0567959A2 (en) * 1992-04-29 1993-11-03 Dynamit Nobel Aktiengesellschaft Electric primer with rated discharge gap
DE10226544A1 (en) * 2002-06-14 2003-12-24 Flexiva Automation & Anlagenba Pyrotechnic ignition system for passenger protection systems and containing a system for protecting against electromagnetic radiation
EP1441193A1 (en) * 2003-01-21 2004-07-28 Takata Corporation Initiator and gas generator
EP1725826A1 (en) * 2004-03-18 2006-11-29 Orica Explosives Technology Pty Ltd Connector for electronic detonators
CN107957221A (en) * 2017-11-29 2018-04-24 贵州贵安新联爆破工程有限公司 A kind of safety coefficient high explosion detonator device

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2594823B1 (en) * 1986-02-24 1992-06-12 Ruggieri CONNECTION DEVICE BETWEEN A FIRE WICK OF A PYROTECHNIC PRODUCT AND AN INFLAMMATOR
US4745858A (en) * 1986-09-26 1988-05-24 Ireco Incorporated Electric detonator with static electricity suppression
EP0305453A1 (en) * 1987-03-17 1989-03-08 YARRINGTON, Arthur George Optic detonator coupled to a remote optic triggering means
JP4094529B2 (en) 2003-11-10 2008-06-04 本田技研工業株式会社 Ignition device
US7845277B2 (en) * 2008-05-28 2010-12-07 Autoliv Asp, Inc. Header assembly
RU2751184C1 (en) * 2020-08-27 2021-07-12 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Ignition device

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2802422A (en) * 1953-11-09 1957-08-13 Hercules Powder Co Ltd Static resistance electric initiator
AT197729B (en) * 1954-12-30 1958-05-27 Schaffler & Co Electric detonator, in particular for construction sites at heights
DE1020907B (en) * 1955-05-23
US2821139A (en) * 1956-10-09 1958-01-28 Apstein Maurice Shielded initiator
CH368085A (en) * 1958-01-31 1963-03-15 Montecatini Soc Gen Par L Ind Electric igniter with capacitive protective cover
FR1213764A (en) * 1958-10-27 1960-04-04 Gevelo Electric detonator
US3100447A (en) * 1960-08-31 1963-08-13 Robert E Betts Igniter squib
US3274937A (en) * 1963-04-11 1966-09-27 Physical Sciences Corp Detonation squib
US3272127A (en) * 1963-08-05 1966-09-13 Robert E Betts Igniter squib
US3351012A (en) * 1966-06-30 1967-11-07 Robert E Wilson Explosive bridgewire initiators
DE1646349A1 (en) * 1968-01-02 1971-08-05 Dynamit Nobel Ag Detonator
US3572247A (en) * 1968-08-29 1971-03-23 Theodore Warshall Protective rf attenuator plug for wire-bridge detonators
US3735705A (en) * 1971-07-15 1973-05-29 Amp Inc Filtered electro-explosive device
DE2633590C2 (en) * 1976-07-27 1984-09-27 Daimler-Benz Ag, 7000 Stuttgart Ignition device for a passive restraint system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2464454A1 (en) * 1979-09-03 1981-03-06 Bofors Ab ELECTRICAL IGNITION PROTECT AGAINST ACCIDENTAL RELEASE
EP0029671A1 (en) * 1979-11-20 1981-06-03 Ici Americas Inc. Electrostatic safety element for an electric initiator
EP0029672A1 (en) * 1979-11-20 1981-06-03 Ici Americas Inc. Electric safety initiator
EP0567959A2 (en) * 1992-04-29 1993-11-03 Dynamit Nobel Aktiengesellschaft Electric primer with rated discharge gap
EP0567959A3 (en) * 1992-04-29 1994-03-16 Dynamit Nobel Ag
DE10226544A1 (en) * 2002-06-14 2003-12-24 Flexiva Automation & Anlagenba Pyrotechnic ignition system for passenger protection systems and containing a system for protecting against electromagnetic radiation
EP1441193A1 (en) * 2003-01-21 2004-07-28 Takata Corporation Initiator and gas generator
EP1725826A1 (en) * 2004-03-18 2006-11-29 Orica Explosives Technology Pty Ltd Connector for electronic detonators
EP1725826A4 (en) * 2004-03-18 2010-10-20 Orica Explosives Tech Pty Ltd Connector for electronic detonators
US8069789B2 (en) 2004-03-18 2011-12-06 Orica Explosives Technology Pty Ltd Connector for electronic detonators
CN107957221A (en) * 2017-11-29 2018-04-24 贵州贵安新联爆破工程有限公司 A kind of safety coefficient high explosion detonator device

Also Published As

Publication number Publication date
DE2913231A1 (en) 1979-10-11
SE445489B (en) 1986-06-23
GB2018959B (en) 1982-06-16
FR2422138A1 (en) 1979-11-02
IT7948579A0 (en) 1979-04-02
JPS54151109A (en) 1979-11-28
JPS6233515B2 (en) 1987-07-21
SE7902732L (en) 1979-10-04
IT1116470B (en) 1986-02-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee