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GB911746A - Improvements in shot exploders - Google Patents

Improvements in shot exploders

Info

Publication number
GB911746A
GB911746A GB4304659A GB4304659A GB911746A GB 911746 A GB911746 A GB 911746A GB 4304659 A GB4304659 A GB 4304659A GB 4304659 A GB4304659 A GB 4304659A GB 911746 A GB911746 A GB 911746A
Authority
GB
United Kingdom
Prior art keywords
converter
condenser
fired
detonator
switch
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
GB4304659A
Inventor
Michael Anthony Warne
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.)
Marston Excelsior Ltd
Original Assignee
Marston Excelsior 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 Marston Excelsior Ltd filed Critical Marston Excelsior Ltd
Priority to GB4304659A priority Critical patent/GB911746A/en
Publication of GB911746A publication Critical patent/GB911746A/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)
  • Air Bags (AREA)

Abstract

911,746. Blasting. MARSTON EXCELSIOR Ltd. Jan. 4, 1961 [Dec. 18, 1959], No. 43046/59. Class 38 (4). An electrically fired detonator, not shown, connected to terminals 7, 8 of a portable shot exploder is fired when a condenser 4 charged from the high-voltage output of a D.C. converter 2 is discharged through it. The D.C. converter 2 derives its low voltage impact from a small number of 1ยข-volt cells 1 and charges the condenser 4 through switch member 5 when it is connected to the terminal 3. The detonator is fired; when the condenser is subsequently discharged through it, by moving switch member 5 so as to abut terminal 6. The D.C. converter may preferably consist of a pair of transistors used as an oscillating switch, followed by a voltage step-up transformer and a bridge rectifier. The voltage output of the converter may be adjusted to suit varying detonator circuit conditions and the oscillation of the switch maintained by a regenerative winding on the step-up transformer or by a separate transistor oscillator.
GB4304659A 1959-12-18 1959-12-18 Improvements in shot exploders Expired GB911746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4304659A GB911746A (en) 1959-12-18 1959-12-18 Improvements in shot exploders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4304659A GB911746A (en) 1959-12-18 1959-12-18 Improvements in shot exploders

Publications (1)

Publication Number Publication Date
GB911746A true GB911746A (en) 1962-11-28

Family

ID=10427082

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4304659A Expired GB911746A (en) 1959-12-18 1959-12-18 Improvements in shot exploders

Country Status (1)

Country Link
GB (1) GB911746A (en)

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