FR2309494A1 - Safety detonator for rock excavations - has small charge in short thick tube inside long thin tube - Google Patents

Safety detonator for rock excavations - has small charge in short thick tube inside long thin tube

Info

Publication number
FR2309494A1
FR2309494A1 FR7513334A FR7513334A FR2309494A1 FR 2309494 A1 FR2309494 A1 FR 2309494A1 FR 7513334 A FR7513334 A FR 7513334A FR 7513334 A FR7513334 A FR 7513334A FR 2309494 A1 FR2309494 A1 FR 2309494A1
Authority
FR
France
Prior art keywords
walled tube
detonator
thick
tube
thin
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.)
Withdrawn
Application number
FR7513334A
Other languages
French (fr)
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.)
Societe dExplosifs et Produits Chimiques SA
Original Assignee
Societe dExplosifs et Produits Chimiques SA
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 Societe dExplosifs et Produits Chimiques SA filed Critical Societe dExplosifs et Produits Chimiques SA
Priority to FR7513334A priority Critical patent/FR2309494A1/en
Priority to OA55803A priority patent/OA05308A/en
Priority to GR50590A priority patent/GR59749B/en
Priority to ES1976220460U priority patent/ES220460Y/en
Priority to IN720/CAL/76A priority patent/IN145666B/en
Priority to IT22719/76A priority patent/IT1058966B/en
Priority to SE7604906A priority patent/SE7604906L/en
Priority to DE19762618706 priority patent/DE2618706A1/en
Publication of FR2309494A1 publication Critical patent/FR2309494A1/en
Withdrawn legal-status Critical Current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
    • F42B3/195—Manufacture

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Air Bags (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Lighters Containing Fuel (AREA)

Abstract

A safety detonator comprises a detonating element (b), consisting of a very small quantity of explosive, situated in the bore of a thick-walled tube. This tube in turn is inserted in a long, open-ended, thin-walled tube (a), one end of which is connected to the detonator cord and the other to the fuse or electrical detonator (c). The thick-walled tube is pref. of metal, a metal alloy or a structurally strong plastic material compatible with the explosive mixture. It is pref. an integral part of the thin-walled tube or alternatively may be pressed, bonded or passed into the thin-walled tube. The total weight of explosive mixture is 4-200 (20-80) mg. The length of the thick-walled tube is at least 1.5 times its internal diameter. There may be a delay device, either inside the thick walled tube itself or outside it. Used in particular for mining, quarrying and tunnelling. The detonator is virtually proof against accidental detonation as a result of shock. It is therefore extremely safe to transport and handle.
FR7513334A 1975-04-29 1975-04-29 Safety detonator for rock excavations - has small charge in short thick tube inside long thin tube Withdrawn FR2309494A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FR7513334A FR2309494A1 (en) 1975-04-29 1975-04-29 Safety detonator for rock excavations - has small charge in short thick tube inside long thin tube
OA55803A OA05308A (en) 1975-04-29 1976-04-19 Improvements to detonators.
GR50590A GR59749B (en) 1975-04-29 1976-04-20 Perfections to detonators
ES1976220460U ES220460Y (en) 1975-04-29 1976-04-22 IMPROVEMENTS IN HIGH SECURITY DETONATORS.
IN720/CAL/76A IN145666B (en) 1975-04-29 1976-04-26
IT22719/76A IT1058966B (en) 1975-04-29 1976-04-27 REFINEMENTS FOR DETONATORS
SE7604906A SE7604906L (en) 1975-04-29 1976-04-28 DETONATOR
DE19762618706 DE2618706A1 (en) 1975-04-29 1976-04-28 IGNITOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7513334A FR2309494A1 (en) 1975-04-29 1975-04-29 Safety detonator for rock excavations - has small charge in short thick tube inside long thin tube

Publications (1)

Publication Number Publication Date
FR2309494A1 true FR2309494A1 (en) 1976-11-26

Family

ID=9154588

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7513334A Withdrawn FR2309494A1 (en) 1975-04-29 1975-04-29 Safety detonator for rock excavations - has small charge in short thick tube inside long thin tube

Country Status (8)

Country Link
DE (1) DE2618706A1 (en)
ES (1) ES220460Y (en)
FR (1) FR2309494A1 (en)
GR (1) GR59749B (en)
IN (1) IN145666B (en)
IT (1) IT1058966B (en)
OA (1) OA05308A (en)
SE (1) SE7604906L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0717259A1 (en) * 1994-12-14 1996-06-19 Altech Industries (Pty) Limited Detonators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0717259A1 (en) * 1994-12-14 1996-06-19 Altech Industries (Pty) Limited Detonators

Also Published As

Publication number Publication date
IN145666B (en) 1985-01-05
IT1058966B (en) 1982-05-10
GR59749B (en) 1978-02-25
OA05308A (en) 1981-02-28
SE7604906L (en) 1976-11-30
ES220460U (en) 1976-10-01
DE2618706A1 (en) 1976-12-30
ES220460Y (en) 1977-02-16

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Legal Events

Date Code Title Description
ST Notification of lapse