GB758563A - An improved blasting device - Google Patents

An improved blasting device

Info

Publication number
GB758563A
GB758563A GB1256254A GB1256254A GB758563A GB 758563 A GB758563 A GB 758563A GB 1256254 A GB1256254 A GB 1256254A GB 1256254 A GB1256254 A GB 1256254A GB 758563 A GB758563 A GB 758563A
Authority
GB
United Kingdom
Prior art keywords
charge
head
initiator
firing
pressure
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
GB1256254A
Inventor
Samuel Henry Davidson
David Auchinvole Love
Hugh Thomas Williams
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
Priority to NL195493D priority Critical patent/NL195493A/xx
Priority to NL96243D priority patent/NL96243C/xx
Priority to BE536823D priority patent/BE536823A/xx
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB1256254A priority patent/GB758563A/en
Priority to DEI9937A priority patent/DE1008634B/en
Priority to FR1121323D priority patent/FR1121323A/en
Priority to US498942A priority patent/US2869462A/en
Publication of GB758563A publication Critical patent/GB758563A/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
    • F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
    • F42B3/06—Blasting cartridges, i.e. case and explosive for producing gas under pressure with re-utilisable case

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

758,563. Blasting cartridges. IMPERIAL CHEMICAL INDUSTRIES, Ltd. Feb. 23, 1955 [April 30, 1954], No. 12562/54. Classes 9(1) and 9(2) A fluid-pressure blasting device comprising a tensile steel tube 1 containing a gasproducing charge and having a firing head 19 is provided with a venting head 4 having a cutting edge 5 against which rests a rupturable member 10 sealing the charge chamber from the venting head. The joint between the head 4 and the tube 1 is made gas-tight by a gasket 8. A fireproofed cardboard cylinder 9 closed by the tapered member 10 contains a charge 11 comprising a mixture of ammonium nitrate, magnesium nitrate hexatydrate and wood flour and a priming charge 12, which is a mixture of guanidine nitrate and potassium persulphate. The charge 11 sustains its own decomposition only at pressures above atmospheric and the charge 12 will not ignite methane-air mixtures. An electric initiator 13 is inserted in the charge 12 and contains an antimony/permanganate composition, the casing of the initiator being of copper and remaining intact when fired. Insulated lead wires 15, 16 connect the initiator to a live terminal 17 and an earthed terminal 18 respectively. An O-ring 21, which may be of a resilient polymerized chloroprene composition, is seated in the firing head to provide a seal for the charge chamber. After firing the device, the rising pressure in the charge chamber forces the plug 10 against the cutting edge 5 to form a tight seal, the plug being adapted to rupture at a pressure of 1400 kg./cm<SP>2</SP>.
GB1256254A 1954-04-30 1954-04-30 An improved blasting device Expired GB758563A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL195493D NL195493A (en) 1954-04-30
NL96243D NL96243C (en) 1954-04-30
BE536823D BE536823A (en) 1954-04-30
GB1256254A GB758563A (en) 1954-04-30 1954-04-30 An improved blasting device
DEI9937A DE1008634B (en) 1954-04-30 1955-03-10 Gas cartridge
FR1121323D FR1121323A (en) 1954-04-30 1955-03-24 Blasting device
US498942A US2869462A (en) 1954-04-30 1955-04-04 Blasting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1256254A GB758563A (en) 1954-04-30 1954-04-30 An improved blasting device

Publications (1)

Publication Number Publication Date
GB758563A true GB758563A (en) 1956-10-03

Family

ID=10006943

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1256254A Expired GB758563A (en) 1954-04-30 1954-04-30 An improved blasting device

Country Status (5)

Country Link
BE (1) BE536823A (en)
DE (1) DE1008634B (en)
FR (1) FR1121323A (en)
GB (1) GB758563A (en)
NL (2) NL96243C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU185544B (en) * 1982-06-04 1985-02-28 Mecseki Szenbanyak Method and mechanism for breaking by firedampproof blasting of large charge carried out in mine areas impossible to supervise
CN107461195A (en) * 2017-09-29 2017-12-12 段新峰 Explosion gas fracturing pipe and the blasting method using gas fracturing pipe
CN114858008B (en) * 2022-04-28 2023-12-01 湖北航天技术研究院总体设计所 Burner with two-side air outlet

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648283A (en) * 1952-10-20 1953-08-11 Du Pont Pressure resistant blasting cartridge closure assembly

Also Published As

Publication number Publication date
FR1121323A (en) 1956-08-08
NL96243C (en)
DE1008634B (en) 1957-05-16
NL195493A (en)
BE536823A (en)

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