GB912558A - Improvements in or relating to deflagrating compositions and electric delay detonators containing them - Google Patents

Improvements in or relating to deflagrating compositions and electric delay detonators containing them

Info

Publication number
GB912558A
GB912558A GB28804/60A GB2880460A GB912558A GB 912558 A GB912558 A GB 912558A GB 28804/60 A GB28804/60 A GB 28804/60A GB 2880460 A GB2880460 A GB 2880460A GB 912558 A GB912558 A GB 912558A
Authority
GB
United Kingdom
Prior art keywords
lead
composition
delay
charge
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
GB28804/60A
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 GB912558A publication Critical patent/GB912558A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Air Bags (AREA)
  • Resistance Heating (AREA)
  • Fuses (AREA)

Abstract

912,558. Electric blasting detonators and delay compositions therefor. DU PONT DE NEMOURS & CO., E.I. Aug. 19, 1960 [Oct. 7, 1959], No. 28805/60. Classes 9 (1) and 9 (2). A deflagrating composition, especially suitable for use as a delay composition in electric delay detonators, comprises boron, red lead and not more than 75%, based on the weight of the composition, of dibasic lead phosphite. Preferred proportions are 74.5 to 22% of red lead, 0.5 to 3.0% of boron, 25 to 75% of dibasic lead phosphite and in a typical example (No. 1) these are 53.13 : 45.50 : 1.37 respectively. A graining agent such as " Neoprene " or " Thiokol " (Registered Trade Mark) LP-2 in an amount of 0.5 to 1.5% may be added. The detonator may consist of an aluminium shell 1 containing a base charge 2 of a mixture of pentaerythritol tetranitrate and graphite; and a primer charge 3 of lead azide. The delay composition of the invention 4 is present in a swaged lead tube carrier 5 and an aluminium capsule 6 with a perforation 7 is placed above. Polyethylene cup 8 contains a loose ignition charge, and the upper end of the shell is sealed by a rubber plug 10 through which pass insulated lead wires 11 which extend beyond the lower portion of the plug and are joined by a high resistance bridge wire. Specification 739,560 is referred to.
GB28804/60A 1959-10-07 1960-08-19 Improvements in or relating to deflagrating compositions and electric delay detonators containing them Expired GB912558A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US844908A US2991714A (en) 1959-10-07 1959-10-07 Delay composition

Publications (1)

Publication Number Publication Date
GB912558A true GB912558A (en) 1962-12-12

Family

ID=25293935

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28804/60A Expired GB912558A (en) 1959-10-07 1960-08-19 Improvements in or relating to deflagrating compositions and electric delay detonators containing them

Country Status (2)

Country Link
US (1) US2991714A (en)
GB (1) GB912558A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1407732A (en) * 1966-03-08 1975-09-24 Defence Secreta Y Of State For Ignitable compositions
US4316412A (en) * 1979-06-05 1982-02-23 The United States Of America As Represented By The United States Department Of Energy Low voltage nonprimary explosive 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
CN1934406B (en) * 2004-03-18 2011-06-08 澳瑞凯炸药技术有限公司 Connector for electronic detonators

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2483469A (en) * 1947-02-14 1949-10-04 Nat Lead Co Basic lead phosphite pigments
US2478415A (en) * 1948-05-22 1949-08-09 Du Pont Blasting initiator
US2604044A (en) * 1948-06-23 1952-07-22 Atlas Powder Co Blasting cap
US2717204A (en) * 1952-05-02 1955-09-06 Du Pont Blasting initiator composition
US2757566A (en) * 1953-02-26 1956-08-07 Canadian Ind 1954 Ltd Delay electric blasting caps containing spiral delay elements
US2836483A (en) * 1953-11-06 1958-05-27 Du Pont Red lead composition having improved flow propertiles
US2887054A (en) * 1956-01-13 1959-05-19 Du Pont Blasting initiator
US2796834A (en) * 1956-03-09 1957-06-25 Canadian Ind Short interval delay blasting device
US2878752A (en) * 1956-12-05 1959-03-24 Du Pont Blasting initiator

Also Published As

Publication number Publication date
US2991714A (en) 1961-07-11

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