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GB684811A - Safety device for the prevention of explosion of electric detonators - Google Patents

Safety device for the prevention of explosion of electric detonators

Info

Publication number
GB684811A
GB684811A GB2685/51A GB268551A GB684811A GB 684811 A GB684811 A GB 684811A GB 2685/51 A GB2685/51 A GB 2685/51A GB 268551 A GB268551 A GB 268551A GB 684811 A GB684811 A GB 684811A
Authority
GB
United Kingdom
Prior art keywords
metal
blasting
covering
igniter
charge
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
GB2685/51A
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.)
EILIF PLATOU
THORSTEIN WEREIDE
Original Assignee
EILIF PLATOU
THORSTEIN WEREIDE
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 EILIF PLATOU, THORSTEIN WEREIDE filed Critical EILIF PLATOU
Publication of GB684811A publication Critical patent/GB684811A/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
    • F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
    • 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
    • F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
    • F42B3/182—Safety initiators resistant to premature firing by static electricity or stray currents having shunting means

Landscapes

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

Abstract

684,811. Blasting fuzes. WEREIDE, T., and PLATOU, E. Feb. 2, 1951 [Oct. 17, 1950], No. 2685/51. Class 9(i) An electric detonator is screened against ignition by stray currents by enclosing the lead wires in a structure forming with the detonator casing an electrically conducting shield. Fig. 3 shows a blasting cap comprising an aluminium casing 1 containing a charge 2, e.g. lead azide and tetryl, a delay element 3 and an igniter 4. A perforated member separates the charge 2 from the delay element and the ignition material is carried bv a wire filament 5, e.g. platinum, connecting electric conductors 7 passing through a closure 6. The conductors 7 consist of copper wires 9 covered by an insulating layer 10 over which a metal covering 8 is placed. This metal covering may be aluminium or tin foil or a metal sheath pressed around the wire. The covering 8 is connected to the metal case of the igniter, both electrically and mechanically, by shrinking, pressing, soldering, welding, or by a wrapping of metal foil. The free ends of the leads 7 are connected to a current source or in series with other blasting caps.
GB2685/51A 1950-10-17 1951-02-02 Safety device for the prevention of explosion of electric detonators Expired GB684811A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO297846X 1950-10-17

Publications (1)

Publication Number Publication Date
GB684811A true GB684811A (en) 1952-12-24

Family

ID=19905169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2685/51A Expired GB684811A (en) 1950-10-17 1951-02-02 Safety device for the prevention of explosion of electric detonators

Country Status (5)

Country Link
BE (1) BE506411A (en)
CH (1) CH297846A (en)
DE (1) DE876824C (en)
FR (1) FR1043887A (en)
GB (1) GB684811A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE963942C (en) * 1954-03-03 1957-05-16 Gevelot S A Safety transport packaging for electric detonators
DE1097338B (en) * 1959-06-27 1961-01-12 Ernst Kauder Electric safety igniter

Also Published As

Publication number Publication date
BE506411A (en)
CH297846A (en) 1954-04-15
DE876824C (en) 1953-05-18
FR1043887A (en) 1953-11-12

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