GB858794A - Novel blasting assembly and method - Google Patents

Novel blasting assembly and method

Info

Publication number
GB858794A
GB858794A GB9834/59A GB983459A GB858794A GB 858794 A GB858794 A GB 858794A GB 9834/59 A GB9834/59 A GB 9834/59A GB 983459 A GB983459 A GB 983459A GB 858794 A GB858794 A GB 858794A
Authority
GB
United Kingdom
Prior art keywords
charge
cord
explosive
blasting
delay
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
GB9834/59A
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 GB858794A publication Critical patent/GB858794A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F42D1/06—Relative timing of multiple charges

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Abstract

858,794. Blasting fuzes and charges. DU PONT DE NEMOURS & CO., E. I. March 20, 1959 [April 21, 1958], No. 9834/59. Class 9(1). A blasting assembly comprises an explosive charge C into which is inserted a non-electric delay initiator D connected to ignition means by detonating fuze cord E, the cord E being as described and claimed in Specification 815,532. The assembly when inserted in a borehole is retained therein by stemming F. The initiator preferably comprises a shell G, Fig. 2, containing a base charge H of detonating explosive, and a primer charge J of heat-sensitive explosive abutting a delay element above which is an ignition charge M, such as boron and red lead, to be ignited by the cord E which is crimped into the shell. The delay element is a rigid tube L filled with a delay composition K such as selenium and barium peroxide. A metal capsule N having a flash passage P is inverted over the charge M. Several boreholes each loaded with a blasting assembly may have their respective cords E connected to a common energizing source such as a length of Primacord actuated by a cap and safety fuze, so that all the cords E are detonated almost simultaneously.
GB9834/59A 1958-04-21 1959-03-20 Novel blasting assembly and method Expired GB858794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US858794XA 1958-04-21 1958-04-21

Publications (1)

Publication Number Publication Date
GB858794A true GB858794A (en) 1961-01-18

Family

ID=22194565

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9834/59A Expired GB858794A (en) 1958-04-21 1959-03-20 Novel blasting assembly and method

Country Status (3)

Country Link
FR (1) FR1221577A (en)
GB (1) GB858794A (en)
MY (1) MY6400057A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240777A (en) * 1990-02-07 1991-08-14 Ensign Bickford Co Delay train ignition buffer.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240777A (en) * 1990-02-07 1991-08-14 Ensign Bickford Co Delay train ignition buffer.
GB2240777B (en) * 1990-02-07 1993-12-08 Ensign Bickford Co Delay train ignition buffer

Also Published As

Publication number Publication date
FR1221577A (en) 1960-06-02
MY6400057A (en) 1964-12-31

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