GB891972A - New electric blasting caps and initiators therefor - Google Patents

New electric blasting caps and initiators therefor

Info

Publication number
GB891972A
GB891972A GB7414/60A GB741460A GB891972A GB 891972 A GB891972 A GB 891972A GB 7414/60 A GB7414/60 A GB 7414/60A GB 741460 A GB741460 A GB 741460A GB 891972 A GB891972 A GB 891972A
Authority
GB
United Kingdom
Prior art keywords
fuzehead
charge
electrodes
sheet
mixture
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
GB7414/60A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB891972A publication Critical patent/GB891972A/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
    • F42B3/195—Manufacture
    • 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
    • F42B3/12—Bridge initiators
    • F42B3/124—Bridge initiators characterised by the configuration or material of the bridge

Abstract

891,972. Blasting fuzes. DU PONT DE NEMOURS & CO., E. I. March 2, 1960 [March 2, 1959], No. 7414/60. Class 9(1). An electric blasting cap is provided with a fuzehead comprising a dielectric sheet 20 having on one side spaced electrodes 16, 16<SP>1</SP> connected by a wire 9 bridging a gap 17 in the sheet. Closing the metal shell 1 of the cap is a resilient plug 8 formed in two halves between which the sheet 20 is so sandwiched that the bridgecarrying portion is exposed and dips into an igniter composition 5 housed in a cup 4 of polyethylene or like material. This arrangement is said to minimise danger due to 'arcing'. A sleeve 14 filled with a delay mixture may be placed between the fuzehead and a primer charge 3 overlying a base charge 2. The fuzehead may be formed by a "printed circuit" technique, the electrodes being a copper or other metal coating applied by vapour deposition on to a support of plastic material such as polyethylene terephthalate or on to glass or mica, surplus metal being subsequently removed by chemical or mechanical means before soldering the wire 9 in position. The delay charge may be an 85/15 barium oxide-selenium or a 2/98 boron/red lead mixture, which latter mixture may also be used as the igniter material 5. The primer 3 may be lead azide and PETN may be used as the base charge. The plug sections have parallel grooves to receive leg wires attached to the electrodes.
GB7414/60A 1959-03-02 1960-03-02 New electric blasting caps and initiators therefor Expired GB891972A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US796350A US2999460A (en) 1959-03-02 1959-03-02 Electric blasting cap

Publications (1)

Publication Number Publication Date
GB891972A true GB891972A (en) 1962-03-21

Family

ID=25167991

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7414/60A Expired GB891972A (en) 1959-03-02 1960-03-02 New electric blasting caps and initiators therefor

Country Status (3)

Country Link
US (1) US2999460A (en)
DE (1) DE1163210B (en)
GB (1) GB891972A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277766A (en) * 1964-08-04 1966-10-11 Francis B Burkdoll Explosively releasable bolt
JPS5414509A (en) * 1977-07-04 1979-02-02 Asahi Chemical Ind Electric detonator
US4335652A (en) * 1979-02-26 1982-06-22 E. I. Du Pont De Nemours & Company Non-electric delay detonator
US4369708A (en) * 1979-09-21 1983-01-25 E. I. Du Pont De Nemours And Company Delay blasting cap
US4429632A (en) 1981-04-27 1984-02-07 E. I. Du Pont De Nemours & Co. Delay detonator
US4696231A (en) * 1986-02-25 1987-09-29 E. I. Du Pont De Nemours And Company Shock-resistant delay detonator
US4996922A (en) * 1989-11-15 1991-03-05 The United States Of America As Represented By The United States Department Of Energy Low profile thermite igniter
AT2781U1 (en) * 1998-03-09 1999-04-26 Hirtenberger Praezisionstechni ELECTRICALLY RELEASABLE IGNITER FOR CONNECTING A DRIVE CHARGE
JP4601619B2 (en) 2003-05-21 2010-12-22 アレックザ ファーマシューティカルズ， インコーポレイテッド Built-in heating unit and medicine supply unit using the same
US7402777B2 (en) 2004-05-20 2008-07-22 Alexza Pharmaceuticals, Inc. Stable initiator compositions and igniters
JP2007537967A (en) * 2004-05-20 2007-12-27 アレックザ ファーマシューティカルズ， インコーポレイテッド Stable initiator composition and igniter
EP2246086A3 (en) 2004-08-12 2012-11-21 Alexza Pharmaceuticals, Inc. Aerosol drug delivery device incorporating percussively activated heating unit
CN103148746A (en) * 2013-04-07 2013-06-12 安徽理工大学 Electric detonator with special burster charging structure
WO2017041820A1 (en) * 2015-09-07 2017-03-16 Abb Schweiz Ag An automated connection system for a charging application and a charging method
FR3043191B1 (en) 2015-10-29 2018-03-02 Nexter Munitions IGNITER FOR THRUSTER
AU2020371113A1 (en) * 2019-10-23 2022-05-19 Orica International Pte Ltd Automated systems and apparatuses for storing, transporting, dispensing, and tracking initiation device components configurable for initiating explosive material compositions

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE278357C (en) *
DE1049756B (en) *
US1935495A (en) * 1931-01-22 1933-11-14 Atlas Powder Co Slow match composition
US2235009A (en) * 1937-05-18 1941-03-18 Ici Ltd Manufacture of fuseheads
BE438162A (en) * 1939-03-03
BE488616A (en) * 1948-04-30
US2762302A (en) * 1951-11-16 1956-09-11 Norman A Macleod Electric detonator
US2880671A (en) * 1954-10-05 1959-04-07 Sylvania Electric Prod Initiator primer
BE546106A (en) * 1955-03-15
US2878752A (en) * 1956-12-05 1959-03-24 Du Pont Blasting initiator

Also Published As

Publication number Publication date
US2999460A (en) 1961-09-12
DE1163210B (en) 1964-02-13

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