US3797393A - Exploding wire fuse component - Google Patents

Exploding wire fuse component Download PDF

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Publication number
US3797393A
US3797393A US00260493A US3797393DA US3797393A US 3797393 A US3797393 A US 3797393A US 00260493 A US00260493 A US 00260493A US 3797393D A US3797393D A US 3797393DA US 3797393 A US3797393 A US 3797393A
Authority
US
United States
Prior art keywords
metallic
pin
ceramic body
exploding wire
fuse
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 - Lifetime
Application number
US00260493A
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English (en)
Inventor
V Marchandise
E Signoret
G Bal
L Barilero
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.)
Gouvernement de la Republique Francaise
Original Assignee
Gouvernement de la Republique Francaise
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 Gouvernement de la Republique Francaise filed Critical Gouvernement de la Republique Francaise
Application granted granted Critical
Publication of US3797393A publication Critical patent/US3797393A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F42B3/14—Spark initiators

Definitions

  • ABSTRACT A component for an exploding wire fuse comprising a ceramic body having a pair of laterally spaced metallic pins mounted therein. One of the pins extends only partially into the ceramic body and a metallic adjusting pin is mounted within the ceramic body coaxial with that pin. An adjustable gap is provided between the coaxial pins to permit adjustment during assembly of the threshold potential for energizing the fuse.
  • the present invention relates to a wire-exploding, pyrotechnic fuse and, in particular, to a component for use with a fuse of this type which prevents actuation of the fuse by voltages having a magnitude below a predetermined value.
  • a component for a pyrotechnic fuse which comprises a metallized ceramic support having first and second laterally spaced iron-nickel alloy metallic pins mounted within apertures in the ceramic support.
  • One of the pins includes an adjustable spark gap which permits the operational fuse potential to be set during assembly.
  • the pins are connected at one end to the exploding wire of the fuse, and at the other end to a high energy pulse source.
  • FIGURE shows a diagrammatic cross-section view of the component for use with an exploding wire fuse.
  • the component comprises a ceramic body 1 held in position by being soldered or welded into a hollow metallic body 2 made of treated steel.
  • the ceramic body 1 holds connecting pins 3 and 4 which are soldered or welded to the ceramic body by means of the metallizing portions 5.
  • Connecting pin 3 extends to the lower part of ceramic body I and connecting pin 4 is of shorter length.
  • An adjusting screw 6 is threaded into the metallic sleeve 7 to provide a gap 8 between pin 5 and screw 6.
  • pins 3 and 4 comprise a lockable high-potential connector which may be connected to an energy supply and the lower end of the device serves to encapsulate the pyrotechnic charge and to make mechanical contact with the exploding wire fuse.
  • the device insures that assembly and rigid mounting of the fuse will take place within a metallic-treated steel body.
  • the ceramic-metal junctions are obtained by means of soldering, brazing or welding.
  • the exploding wire is made of platinum and may be joined to the pins ends by tin-based solder.
  • inter-electrode spacing 8 is adjusted by rotating screw 6 until the desired gap is obtained.
  • a high potential generator may be used to obtain the desired setting.
  • the device is primarily meant for use in exploding wire electro-pyrotechnic devices which, because of their design, provide a very high degree of safety and reliability. They may be used in a number of scientific applications such as plasma studies and microphotography.
  • a component for an exploding wire fuse comprising:
  • first and second parallel metallic pins mounted within said ceramic body and adapted to be connected to a voltage source
  • a threaded metallic adjustable pin screwed in said bore one end of said adjustable pin being adjustably spaced from an end of said first metallic pin to provide a spark-gap therebetween, an ignition and testing-circuit being established through said first metallic pin, said gap, said adjustable pin, said exploding wire and said second metallic pin, the accurate potential threshold of said gap being set by connecting a power source to the ends of said circuit and rotating said adjustable pin.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Fuses (AREA)
  • Feeding Of Articles To Conveyors (AREA)
  • Laminated Bodies (AREA)
US00260493A 1971-06-08 1972-06-07 Exploding wire fuse component Expired - Lifetime US3797393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7120630A FR2140785A5 (2) 1971-06-08 1971-06-08

Publications (1)

Publication Number Publication Date
US3797393A true US3797393A (en) 1974-03-19

Family

ID=9078261

Family Applications (1)

Application Number Title Priority Date Filing Date
US00260493A Expired - Lifetime US3797393A (en) 1971-06-08 1972-06-07 Exploding wire fuse component

Country Status (8)

Country Link
US (1) US3797393A (2)
AU (1) AU465344B2 (2)
CA (1) CA947567A (2)
DE (1) DE2227799C2 (2)
FR (1) FR2140785A5 (2)
GB (1) GB1336095A (2)
NO (1) NO133288C (2)
ZA (1) ZA723586B (2)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245755A (en) * 1979-11-16 1981-01-20 The Vendo Company Product storage space apportioning apparatus for product dispensing machines
US6502512B2 (en) * 2000-07-13 2003-01-07 Tda Armements Sas Secured high-power electro-pyrotechnic initiator
US6516724B2 (en) * 2000-11-27 2003-02-11 Trw Airbag Systems Gmbh & Co. Kg Gas generator
US6584905B1 (en) * 2000-11-06 2003-07-01 Richard N. Snyder Plated through-hole ignitor for detonation cord or shock tube
US20090072943A1 (en) * 2007-09-17 2009-03-19 Littelfuse, Inc. Fuses with slotted fuse bodies
US9939235B2 (en) 2013-10-09 2018-04-10 Battelle Energy Alliance, Llc Initiation devices, initiation systems including initiation devices and related methods

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117519A (en) * 1962-01-31 1964-01-14 Charles R Hamilton Electric initiators for explosives, pyrotechnics and propellants
US3157120A (en) * 1962-01-12 1964-11-17 William C Morgan Solid dielectric exploding bridgewire series safety element
US3169482A (en) * 1963-08-14 1965-02-16 Eitelmccullough Inc Electro explosive device having a surface spark gap
US3175492A (en) * 1961-06-13 1965-03-30 Schlumberger Prospection Electrical safety detonator
US3198118A (en) * 1960-12-06 1965-08-03 Honeywell Inc Arming circuit with pressure responsive discharge switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274937A (en) * 1963-04-11 1966-09-27 Physical Sciences Corp Detonation squib

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198118A (en) * 1960-12-06 1965-08-03 Honeywell Inc Arming circuit with pressure responsive discharge switch
US3175492A (en) * 1961-06-13 1965-03-30 Schlumberger Prospection Electrical safety detonator
US3157120A (en) * 1962-01-12 1964-11-17 William C Morgan Solid dielectric exploding bridgewire series safety element
US3117519A (en) * 1962-01-31 1964-01-14 Charles R Hamilton Electric initiators for explosives, pyrotechnics and propellants
US3169482A (en) * 1963-08-14 1965-02-16 Eitelmccullough Inc Electro explosive device having a surface spark gap

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245755A (en) * 1979-11-16 1981-01-20 The Vendo Company Product storage space apportioning apparatus for product dispensing machines
US6502512B2 (en) * 2000-07-13 2003-01-07 Tda Armements Sas Secured high-power electro-pyrotechnic initiator
US6584905B1 (en) * 2000-11-06 2003-07-01 Richard N. Snyder Plated through-hole ignitor for detonation cord or shock tube
US6516724B2 (en) * 2000-11-27 2003-02-11 Trw Airbag Systems Gmbh & Co. Kg Gas generator
US20090072943A1 (en) * 2007-09-17 2009-03-19 Littelfuse, Inc. Fuses with slotted fuse bodies
US8154376B2 (en) 2007-09-17 2012-04-10 Littelfuse, Inc. Fuses with slotted fuse bodies
US9939235B2 (en) 2013-10-09 2018-04-10 Battelle Energy Alliance, Llc Initiation devices, initiation systems including initiation devices and related methods

Also Published As

Publication number Publication date
NO133288B (2) 1975-12-29
CA947567A (en) 1974-05-21
FR2140785A5 (2) 1973-01-19
AU4312872A (en) 1973-12-13
ZA723586B (en) 1973-03-28
GB1336095A (en) 1973-11-07
AU465344B2 (en) 1975-09-25
DE2227799C2 (de) 1983-01-13
DE2227799A1 (de) 1973-02-15
NO133288C (2) 1976-04-07

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