GB843227A - Improvements in or relating to delay fuse elements for delay electric detonators anddelay electric detonators containing them - Google Patents

Improvements in or relating to delay fuse elements for delay electric detonators anddelay electric detonators containing them

Info

Publication number
GB843227A
GB843227A GB5368/58A GB536858A GB843227A GB 843227 A GB843227 A GB 843227A GB 5368/58 A GB5368/58 A GB 5368/58A GB 536858 A GB536858 A GB 536858A GB 843227 A GB843227 A GB 843227A
Authority
GB
United Kingdom
Prior art keywords
delay
lead
composition
tube
electric detonators
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
GB5368/58A
Inventor
Owen Allen Gurton
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
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB5368/58A priority Critical patent/GB843227A/en
Priority to US790409A priority patent/US3041914A/en
Priority to DEI7514U priority patent/DE1815754U/en
Priority to FR787076A priority patent/FR1223680A/en
Publication of GB843227A publication Critical patent/GB843227A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod

Abstract

843,227. Electric detonators and delay elements therefor. IMPERIAL CHEMICAL INDUSTRIES Ltd. Feb. 2, 1959 [Feb. 19, 1958], No. 5368/58. Classes 9(1) and 9(2) A delay element for electric detonator comprises a metal tube sheathing a delay fuze composition, the charge being subdivided into at least three separated columns of non-circular right section arranged parallel to the axis of the tube in positions intermediate the axis and the peripheral surface of the element. The delay composition may be a 70 : 30 red lead - silicon mixture, a 50/50 lead peroxide - silicon mixture or a 45.5; 45.5 : 9 lead peroxide-silicontitanium dioxide mixture by weight. To make the element, a lead tube 1 is filled with the composition 2 and drawn through a series of dies to reduce the diameter. A number of the tubes 1, say five, is then placed in a lead tube 7, Fig. 5, regularly spaced around a lead rod 3 pentagonal in cross-section. The assembly is then drawn to reduce the diameter and the metal flows to form a matrix in which the cores 2 are embedded, the cores being distorted from their circular section during the drawing operation. The end portions of the assembly are removed and the rest cut into lengths corresponding to the desired delay times before insertion into the detonator casing above the normal primary and secondary charges. The bridge-wire of the electric fuzehead may be coated with a composition comprising lead mononitro-resorcinate and potassium chlorate covered with a composition consisting of cerium-magnesium alloy, potassium chlorate, aluminium and charcoal. The plug carrying the lead wires to the electrodes may be made of a polymerised chloroprene composition. An axial column of the delay composition may also be provided in the element.
GB5368/58A 1958-02-19 1958-02-19 Improvements in or relating to delay fuse elements for delay electric detonators anddelay electric detonators containing them Expired GB843227A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB5368/58A GB843227A (en) 1958-02-19 1958-02-19 Improvements in or relating to delay fuse elements for delay electric detonators anddelay electric detonators containing them
US790409A US3041914A (en) 1958-02-19 1959-02-02 Delay fuse elements for delay electric detonators and delay electric detonators containing them
DEI7514U DE1815754U (en) 1958-02-19 1959-02-16 DELAY ELEMENT FOR ELECTRIC IGNITORS.
FR787076A FR1223680A (en) 1958-02-19 1959-02-18 Development of delayed fusing elements for electric delay detonators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5368/58A GB843227A (en) 1958-02-19 1958-02-19 Improvements in or relating to delay fuse elements for delay electric detonators anddelay electric detonators containing them

Publications (1)

Publication Number Publication Date
GB843227A true GB843227A (en) 1960-08-04

Family

ID=9794791

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5368/58A Expired GB843227A (en) 1958-02-19 1958-02-19 Improvements in or relating to delay fuse elements for delay electric detonators anddelay electric detonators containing them

Country Status (4)

Country Link
US (1) US3041914A (en)
DE (1) DE1815754U (en)
FR (1) FR1223680A (en)
GB (1) GB843227A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2241946A (en) * 1990-03-12 1991-09-18 Ici Plc "Delay composition"

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3243869A (en) * 1962-11-27 1966-04-05 Westinghouse Electric Corp Process for producing thermoelectric elements
ZA723384B (en) * 1972-05-18 1974-01-30 African Explosives & Chem Improvements in fuses and cords
US3851586A (en) * 1973-05-15 1974-12-03 Us Navy Temperature compensated pyrotechnic delays
US4080902A (en) * 1976-11-04 1978-03-28 Teledyne Mccormick Selph High speed igniter device
US5022306A (en) * 1977-03-10 1991-06-11 The United States Of America As Represented By The Secretary Of The Army Method of ejecting an interceptor missile from its silo
US4495867A (en) * 1982-06-18 1985-01-29 E. I. Du Pont De Nemours And Company Assembly for initiating explosives with low-energy detonating cord
US5386780A (en) * 1992-10-21 1995-02-07 Halliburton Company Method and apparatus for extended time delay of the detonation of a downhole explosive assembly

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1106109A (en) * 1913-07-26 1914-08-04 Daniel E Phillips Method of treating old iron and steel pipe.
US1692767A (en) * 1927-04-20 1928-11-20 Gen Cable Corp Stranded sector-shaped conductor
US1923761A (en) * 1932-07-28 1933-08-22 Trojan Powder Co Manufacture of detonating fuse
GB462000A (en) * 1935-08-29 1937-03-01 Charles Edwin Sosson Improvements in or relating to delay action detonators and fuzes and delay compositions for use therein
US2113004A (en) * 1936-05-13 1938-04-05 Trojan Powder Co Detonating fuse
NL63494C (en) * 1942-07-29
US2622314A (en) * 1947-07-07 1952-12-23 Thomas & Betts Corp Method of forming spliced sector cables
BE486578A (en) * 1947-12-31
US2722733A (en) * 1950-11-08 1955-11-08 Cleaver Brooks Co Method of making heat exchanger tube
US2683207A (en) * 1951-07-21 1954-07-06 John A Roebling S Sons Corp Stranded welding rod
BE519351A (en) * 1952-04-21
US2757566A (en) * 1953-02-26 1956-08-07 Canadian Ind 1954 Ltd Delay electric blasting caps containing spiral delay elements
US2707439A (en) * 1954-05-26 1955-05-03 Canadian Ind 1954 Ltd Short interval delay blasting device
US2796834A (en) * 1956-03-09 1957-06-25 Canadian Ind Short interval delay blasting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2241946A (en) * 1990-03-12 1991-09-18 Ici Plc "Delay composition"
GB2241946B (en) * 1990-03-12 1994-04-06 Ici Plc Delay device

Also Published As

Publication number Publication date
FR1223680A (en) 1960-06-20
US3041914A (en) 1962-07-03
DE1815754U (en) 1960-07-28

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