GB744530A - Improvements in or relating to the method and apparatus for firing blasting charges with a delay period between successive detonations - Google Patents

Improvements in or relating to the method and apparatus for firing blasting charges with a delay period between successive detonations

Info

Publication number
GB744530A
GB744530A GB3019552A GB3019552A GB744530A GB 744530 A GB744530 A GB 744530A GB 3019552 A GB3019552 A GB 3019552A GB 3019552 A GB3019552 A GB 3019552A GB 744530 A GB744530 A GB 744530A
Authority
GB
United Kingdom
Prior art keywords
delay period
period
relating
switch
delay
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
GB3019552A
Inventor
James Craig Reid Cance
Kenneth John Brimley
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
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB3019552A priority Critical patent/GB744530A/en
Publication of GB744530A publication Critical patent/GB744530A/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
    • F42D1/045—Arrangements for electric ignition
    • F42D1/05—Electric circuits for blasting

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

744,530. Blasting minerals. IMPERIAL CHEMICAL INDUSTRIES, Ltd. Oct. 2, 1953. [Nov. 28, 1952], No. 30195/52. Class 68(1) In one side of a D.C. power supply to a blasting charge-firing circuit of the type described in Specification 728,598, which is referred to, is inserted a rotary switch 13, 14, 15, 15<SP>1</SP> 16. The switch is so designed that the period of the electric impulses it feeds to the circuit is the same as the delay period desired between successive detonations and the duration of each impulse is less than the delay period of a delay switch 9<SP>1</SP> but longer than the period of time required to fire a detonator 6<SP>1</SP> and its associated delay switch 9<SP>1</SP>. Specification 744,531 also is referred to.
GB3019552A 1952-11-28 1952-11-28 Improvements in or relating to the method and apparatus for firing blasting charges with a delay period between successive detonations Expired GB744530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3019552A GB744530A (en) 1952-11-28 1952-11-28 Improvements in or relating to the method and apparatus for firing blasting charges with a delay period between successive detonations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3019552A GB744530A (en) 1952-11-28 1952-11-28 Improvements in or relating to the method and apparatus for firing blasting charges with a delay period between successive detonations

Publications (1)

Publication Number Publication Date
GB744530A true GB744530A (en) 1956-02-08

Family

ID=10303777

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3019552A Expired GB744530A (en) 1952-11-28 1952-11-28 Improvements in or relating to the method and apparatus for firing blasting charges with a delay period between successive detonations

Country Status (1)

Country Link
GB (1) GB744530A (en)

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