GB874332A - Improvements in safety electric primers for mines - Google Patents

Improvements in safety electric primers for mines

Info

Publication number
GB874332A
GB874332A GB20666/58A GB2066658A GB874332A GB 874332 A GB874332 A GB 874332A GB 20666/58 A GB20666/58 A GB 20666/58A GB 2066658 A GB2066658 A GB 2066658A GB 874332 A GB874332 A GB 874332A
Authority
GB
United Kingdom
Prior art keywords
short
fuzehead
fuze
gap
core
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
GB20666/58A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA
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 Montedison SpA, Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA filed Critical Montedison SpA
Publication of GB874332A publication Critical patent/GB874332A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C23/00—Compounds containing at least one halogen atom bound to a ring other than a six-membered aromatic ring
    • C07C23/02—Monocyclic halogenated hydrocarbons
    • C07C23/10—Monocyclic halogenated hydrocarbons with a six-membered ring
    • C07C23/12—Hexachlorocyclohexanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/24—Obtaining flakes by scraping a solid layer from a surface
    • 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

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Air Bags (AREA)
  • Fuses (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

874,332. Blasting fuzes. MONTECATINI SOC. GENERALE PER L'INDUSTRIA MINERARIA E CHIMICA. June 27, 1958 [July 29, 1957], No. 20666/58. Addition to 842,043. Class 9(1). An electric fuze, as in the parent Specification in which a safety element shortcircuiting the electric supply leads is moved out of the short-circuiting position before the fuze is fired, is rendered additionally safe by a gap in one of the leads between the fuzehead and the short-circuit, the gap being closed by the safety element when it leaves the short - circuiting position. The two leads 8 to the fuzehead 1 are short-circuited by a metal core 2 in contact with a metal conductor 13 grounded by the casing 7. One lead 8 is interrupted between the parts 14, 15. The core 2 is mounted on a pin 11 supported by a wire 12 connecting conductors 3, 4 independent of the firing circuit. On passing a current through the circuit 3, 4, 12, the wire 12 fuses and spring 6 pushes the core 2 towards the fuzehead 1 until it bridges the gap between the parts 14, 15 and thus arms the fuze.
GB20666/58A 1955-11-10 1958-06-27 Improvements in safety electric primers for mines Expired GB874332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT339851X 1955-11-10

Publications (1)

Publication Number Publication Date
GB874332A true GB874332A (en) 1961-08-02

Family

ID=11238478

Family Applications (2)

Application Number Title Priority Date Filing Date
GB34150/56A Expired GB842043A (en) 1955-11-10 1956-11-08 Safety electric primers for mines, protected against lgnition by extraneous electric currents
GB20666/58A Expired GB874332A (en) 1955-11-10 1958-06-27 Improvements in safety electric primers for mines

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB34150/56A Expired GB842043A (en) 1955-11-10 1956-11-08 Safety electric primers for mines, protected against lgnition by extraneous electric currents

Country Status (6)

Country Link
US (1) US2957415A (en)
BE (1) BE552499A (en)
CH (2) CH339851A (en)
DE (1) DE1022140B (en)
FR (2) FR1166112A (en)
GB (2) GB842043A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189627A2 (en) * 1985-01-29 1986-08-06 The State Of Israel Ministry Of Defence Israel Military Industries Launchable pyrotechnic charge with electric fuse
EP0207749A2 (en) * 1985-06-28 1987-01-07 Moorhouse, David John Detonator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094932A (en) * 1960-07-15 1963-06-25 William D Greenlees Electromagnetic radiation proof igniting device
US3075461A (en) * 1960-10-28 1963-01-29 Bilker & Moyerman Method and apparatus for detonating radio frequency sensitive blasting caps
DE1446952B1 (en) * 1964-07-02 1970-07-09 Dynamit Nobel Ag Electric ignition device
US3414292A (en) * 1966-07-01 1968-12-03 Eaton Yale & Towne Inflatable safety device
US3457431A (en) * 1968-02-20 1969-07-22 Dow Chemical Co Time-delayed control device
US3585933A (en) * 1969-05-02 1971-06-22 Us Army Detonator safety device
US5129322A (en) * 1990-05-14 1992-07-14 Jet Research Center, Inc. Explosive tubing cutter and method of assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1726053A (en) * 1927-10-10 1929-08-27 Brown Ladura Alexander Safety coupler
FR718686A (en) * 1930-07-23 1932-01-27 Lignoza Spolka Akcyjna Electrical assembly for igniters
US2026962A (en) * 1934-03-01 1936-01-07 George D Brown Safety switch
US2494256A (en) * 1945-09-11 1950-01-10 Gulf Research Development Co Apparatus for perforating well casings and well walls
NL198656A (en) * 1949-01-22
US2632389A (en) * 1949-09-13 1953-03-24 Atlas Powder Co Electric explosion initiator
US2704032A (en) * 1951-01-30 1955-03-15 Maruschak Nick Safety mine shooting devices

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189627A2 (en) * 1985-01-29 1986-08-06 The State Of Israel Ministry Of Defence Israel Military Industries Launchable pyrotechnic charge with electric fuse
EP0189627A3 (en) * 1985-01-29 1987-05-27 The State Of Israel Ministry Of Defence Israel Military Industries Launchable pyrotechnic charge with electric fuse
EP0207749A2 (en) * 1985-06-28 1987-01-07 Moorhouse, David John Detonator
GB2178830A (en) * 1985-06-28 1987-02-18 Moorhouse D J Detonators
EP0207749A3 (en) * 1985-06-28 1988-02-03 Moorhouse, David John Detonator
US4869171A (en) * 1985-06-28 1989-09-26 D J Moorhouse And S T Deeley Detonator

Also Published As

Publication number Publication date
FR74069E (en) 1960-11-07
DE1022140B (en) 1958-01-02
CH350234A (en) 1960-11-15
FR1166112A (en) 1958-11-03
US2957415A (en) 1960-10-25
BE552499A (en) 1956-11-30
CH339851A (en) 1959-07-15
GB842043A (en) 1960-07-20

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