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GB776854A - Improvements in or relating to delay electric initiators - Google Patents

Improvements in or relating to delay electric initiators

Info

Publication number
GB776854A
GB776854A GB23417/55A GB2341755A GB776854A GB 776854 A GB776854 A GB 776854A GB 23417/55 A GB23417/55 A GB 23417/55A GB 2341755 A GB2341755 A GB 2341755A GB 776854 A GB776854 A GB 776854A
Authority
GB
United Kingdom
Prior art keywords
tube
casing
charge
delay
composition
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
GB23417/55A
Inventor
Royston Arthur Walter Hill
Robert Walter Moody
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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
Priority to BE550304D priority Critical patent/BE550304A/xx
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB23417/55A priority patent/GB776854A/en
Priority to US598584A priority patent/US2863392A/en
Priority to DEI12062A priority patent/DE1024415B/en
Priority to FR1161090D priority patent/FR1161090A/en
Publication of GB776854A publication Critical patent/GB776854A/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
    • F42B3/16—Pyrotechnic delay initiators

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Fuses (AREA)

Abstract

776,854. Blasting fuzes. IMPERIAL CHEMICAL INDUSTRIES, Ltd. May 2,1956 [Aug. 15, 1955], No. 23417/55. Class 9 (1). A ventless delay electric blasting cap comprises a casing 1 containing a base charge 2 and a primary charge 3 separated from the electric fuzehead 9 by a delay element which consists of a metal tube 6 closed at the base and containing a small charge 7 of primary explosive above which is the delay composition 8. The delay element is secured in the casing 1 so that on firing it is retained in the detonator. The delay element may be secured by crimping the tube 6 in the casing 1 or, as shown, the tube 6 may be placed in a tube 4 which contacts the charge 3 and is provided with a flash-hole 5. The tube 4 extends to the end of casing 1 and is crimped with it to a neoprene plug 10 surrounding the lead wires 11. The casing 1 may be Cu, Zn or alloys thereof and the tube 6 may be a Cu alloy or mild steel, while the tube 4 may be Cu, Cu alloy, mild steel, Zn or Zn alloy. In an example the base charge is tetryl and the primary charge an aluminium/lead azide/lead styphnate composition while the delay composition consists of lead dioxide and silicon (50/50) pressed at 18 tons/sq. in. into a mild steel tube. Potassium permanganate and antimony (36/64) may be used for the delay composition:
GB23417/55A 1955-08-15 1955-08-15 Improvements in or relating to delay electric initiators Expired GB776854A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE550304D BE550304A (en) 1955-08-15
GB23417/55A GB776854A (en) 1955-08-15 1955-08-15 Improvements in or relating to delay electric initiators
US598584A US2863392A (en) 1955-08-15 1956-07-18 Delay electric initiators
DEI12062A DE1024415B (en) 1955-08-15 1956-08-14 Blowhole-free electrical delay capsule
FR1161090D FR1161090A (en) 1955-08-15 1956-08-16 Electric delayed detonators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23417/55A GB776854A (en) 1955-08-15 1955-08-15 Improvements in or relating to delay electric initiators

Publications (1)

Publication Number Publication Date
GB776854A true GB776854A (en) 1957-06-12

Family

ID=10195271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23417/55A Expired GB776854A (en) 1955-08-15 1955-08-15 Improvements in or relating to delay electric initiators

Country Status (5)

Country Link
US (1) US2863392A (en)
BE (1) BE550304A (en)
DE (1) DE1024415B (en)
FR (1) FR1161090A (en)
GB (1) GB776854A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522318A (en) * 1990-11-05 1996-06-04 The Ensign-Bickford Company Cushion element for detonators and the like; apparatus and method of assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100447A (en) * 1960-08-31 1963-08-13 Robert E Betts Igniter squib
FR1285413A (en) * 1961-01-13 1962-02-23 Davey Bickford Smith & Cie Sa Electric detonators in time
SE462391B (en) * 1984-08-23 1990-06-18 China Met Imp Exp Shougang SPRAY Capsule and Initiation Element Containing NON-PRIMARY EXPLANATIONS
EP0339847A3 (en) * 1988-04-29 1990-09-05 Aeci Limited A detonator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT132566B (en) * 1925-10-13 1933-03-25 Konrad Schaffler Electric detonator with delay cartridge.
US2133119A (en) * 1935-04-05 1938-10-11 Western Cartridge Co Delay detonator
US2604044A (en) * 1948-06-23 1952-07-22 Atlas Powder Co Blasting cap
BE516956A (en) * 1952-03-01
DE918493C (en) * 1952-03-01 1954-09-27 Dynamit Nobel Ag Firedamp-proof timer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522318A (en) * 1990-11-05 1996-06-04 The Ensign-Bickford Company Cushion element for detonators and the like; apparatus and method of assembly

Also Published As

Publication number Publication date
BE550304A (en)
FR1161090A (en) 1958-08-20
US2863392A (en) 1958-12-09
DE1024415B (en) 1958-02-13

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