GB708422A - Improvements in or relating to delay blasting devices - Google Patents

Improvements in or relating to delay blasting devices

Info

Publication number
GB708422A
GB708422A GB1495050A GB1495050A GB708422A GB 708422 A GB708422 A GB 708422A GB 1495050 A GB1495050 A GB 1495050A GB 1495050 A GB1495050 A GB 1495050A GB 708422 A GB708422 A GB 708422A
Authority
GB
United Kingdom
Prior art keywords
tube
fuze
detonator
tubes
metal
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
GB1495050A
Inventor
Arthur James Lowe
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 BE503949D priority Critical patent/BE503949A/xx
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB1495050A priority patent/GB708422A/en
Priority to FR1038822D priority patent/FR1038822A/en
Priority to DEJ4270A priority patent/DE903320C/en
Publication of GB708422A publication Critical patent/GB708422A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

708,422. Blasting devices. IMPERIAL CHEMICAL INDUSTRIES, Ltd. June 15, 1951 [June 15, 1950], No. 14950/50. Class 9(1) Blasting device for connecting detonating fuze to a plurality of explosive charges for detonation at predetermined intervals comprises a tubular metal sheath 1 surrounding a metal detonator tube 2 and connected at one end to a length 3 of flexible detonating fuze and crimped at the other end to a thick-walled tube 6 of soft rubber or neoprene. At the opposite end of the tube 6 is crimped a second metal sheath 9 joining the tube 6 to a detonator tube 12 which is surrounded by a metal sheath 11. The fuze 3 is waterproofed and has a. textile covering and a core of pentaerythritol tetranitrate. Short rigid metal tubes 7, 8, flanged at one end, are inserted in the ends of the tube 6 to keep the bore open and assist crimping of the sheaths 1, 9. The tubes 2, 12 each contain a secondary detonating charge 24 and a primary charge 23. An open-ended flanged tube 13 containing a compressed delay composition 25, preferably a lead salt of a polynitro-phenolic compound, is held in the tube 11 by a paper tube 10 and the joints between the detonator tubes and the metal sheaths are waterproofed by thin rubber tubes 29. Protuberances 15, 18 are provided on the detonator tubes to assist in positioning the sheaths 1, 9, 11. When the assembly is to be used a length 4 of detonating fuze is inserted in the open end 14 of the sheath 11 which is then crimped to to the fuze. On initiation of the fuze 3 the charges 23, 24 in the tube 2 are detonated. The flame gases enter the tube 6, bulging it out and thereby losing some energy and pass thence to ignite the delay composition 13, which in turn ignites the charges 23, 24 and fuze 4. The fuze 4 then detonates the charge attached to it. Initiation of the fuze 3 may be by a detonator, an explosive charge or a device according to the invention. Specifications 588,613 and 638,974 are referred to.
GB1495050A 1950-06-15 1950-06-15 Improvements in or relating to delay blasting devices Expired GB708422A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE503949D BE503949A (en) 1950-06-15
GB1495050A GB708422A (en) 1950-06-15 1950-06-15 Improvements in or relating to delay blasting devices
FR1038822D FR1038822A (en) 1950-06-15 1951-06-15 Improvements to time blasting devices
DEJ4270A DE903320C (en) 1950-06-15 1951-06-16 Delay device for explosive charges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1495050A GB708422A (en) 1950-06-15 1950-06-15 Improvements in or relating to delay blasting devices

Publications (1)

Publication Number Publication Date
GB708422A true GB708422A (en) 1954-05-05

Family

ID=10050404

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1495050A Expired GB708422A (en) 1950-06-15 1950-06-15 Improvements in or relating to delay blasting devices

Country Status (4)

Country Link
BE (1) BE503949A (en)
DE (1) DE903320C (en)
FR (1) FR1038822A (en)
GB (1) GB708422A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707438A (en) * 1954-05-26 1955-05-03 Canadian Ind 1954 Ltd Short interval delay blasting device
US2707439A (en) * 1954-05-26 1955-05-03 Canadian Ind 1954 Ltd Short interval delay blasting device
US2857845A (en) * 1954-09-29 1958-10-28 Olin Mathieson Explosive device
US2891476A (en) * 1955-06-22 1959-06-23 Ici Ltd Delay blasting devices
US3129663A (en) * 1961-08-11 1964-04-21 Aircraft Armaments Inc Fittings for low energy detonating cord
GB2177483A (en) * 1985-06-28 1987-01-21 Aeci Ltd Interconnecting low energy fuses
GB2348944A (en) * 1999-04-16 2000-10-18 Schlumberger Holdings Booster for use with detonating cords
CN110186341A (en) * 2019-07-05 2019-08-30 中国人民解放军陆军工程大学 Blasting device and method for rapid forming of V-shaped pits in hard rock
CN110207548A (en) * 2019-07-05 2019-09-06 中国人民解放军陆军工程大学 Multidirectional energy-gathering blasting device and method for one-time blasting molding and slag throwing of hard rock
CN110243242A (en) * 2019-07-05 2019-09-17 中国人民解放军陆军工程大学 Blasting device and method for rapid forming and slag throwing of hard rock V-shaped pit body
CN110260733A (en) * 2019-07-05 2019-09-20 中国人民解放军陆军工程大学 Device and method for once forming pit in hard rock by multidirectional energy-gathering water pressure blasting
CN110260742A (en) * 2019-07-05 2019-09-20 中国人民解放军陆军工程大学 Explosion-proof and delayed explosion-propagation device and method for explosive explosion of sectionally spaced explosive charges in closed space

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110260737B (en) * 2019-07-05 2023-07-07 中国人民解放军陆军工程大学 Explosion isolation pipe for sectionally and separately charging explosive in closed space and explosion isolation method

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707438A (en) * 1954-05-26 1955-05-03 Canadian Ind 1954 Ltd Short interval delay blasting device
US2707439A (en) * 1954-05-26 1955-05-03 Canadian Ind 1954 Ltd Short interval delay blasting device
US2857845A (en) * 1954-09-29 1958-10-28 Olin Mathieson Explosive device
US2891476A (en) * 1955-06-22 1959-06-23 Ici Ltd Delay blasting devices
US3129663A (en) * 1961-08-11 1964-04-21 Aircraft Armaments Inc Fittings for low energy detonating cord
GB2177483A (en) * 1985-06-28 1987-01-21 Aeci Ltd Interconnecting low energy fuses
GB2177483B (en) * 1985-06-28 1990-04-04 Aeci Ltd Interconnecting low energy fuses
GB2348944A (en) * 1999-04-16 2000-10-18 Schlumberger Holdings Booster for use with detonating cords
GB2348944B (en) * 1999-04-16 2001-11-07 Schlumberger Holdings Booster for use with detonating cord
US6622630B2 (en) 1999-04-16 2003-09-23 Schlumberger Technology Corporation Booster
CN110186341A (en) * 2019-07-05 2019-08-30 中国人民解放军陆军工程大学 Blasting device and method for rapid forming of V-shaped pits in hard rock
CN110207548A (en) * 2019-07-05 2019-09-06 中国人民解放军陆军工程大学 Multidirectional energy-gathering blasting device and method for one-time blasting molding and slag throwing of hard rock
CN110243242A (en) * 2019-07-05 2019-09-17 中国人民解放军陆军工程大学 Blasting device and method for rapid forming and slag throwing of hard rock V-shaped pit body
CN110260733A (en) * 2019-07-05 2019-09-20 中国人民解放军陆军工程大学 Device and method for once forming pit in hard rock by multidirectional energy-gathering water pressure blasting
CN110260742A (en) * 2019-07-05 2019-09-20 中国人民解放军陆军工程大学 Explosion-proof and delayed explosion-propagation device and method for explosive explosion of sectionally spaced explosive charges in closed space
CN110186341B (en) * 2019-07-05 2023-06-16 中国人民解放军陆军工程大学 Blasting device and method for rapid forming of hard rock V-shaped pits
CN110260733B (en) * 2019-07-05 2023-06-20 中国人民解放军陆军工程大学 Hard rock one-time pit forming device and method for multidirectional energy-gathering hydraulic blasting
CN110207548B (en) * 2019-07-05 2023-06-20 中国人民解放军陆军工程大学 Multidirectional energy-gathering blasting device and method for hard rock one-time blasting forming and ballasting
CN110243242B (en) * 2019-07-05 2023-06-20 中国人民解放军陆军工程大学 Blasting device and method for rapid forming and ballasting of hard rock V-shaped pit body
CN110260742B (en) * 2019-07-05 2023-07-07 中国人民解放军陆军工程大学 Explosion-proof and delay explosion-propagating device and method for sealed space sectional and spaced charge explosion

Also Published As

Publication number Publication date
FR1038822A (en) 1953-10-01
DE903320C (en) 1954-02-04
BE503949A (en)

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