EP0256613A3 - Ignition system - Google Patents

Ignition system Download PDF

Info

Publication number
EP0256613A3
EP0256613A3 EP87303256A EP87303256A EP0256613A3 EP 0256613 A3 EP0256613 A3 EP 0256613A3 EP 87303256 A EP87303256 A EP 87303256A EP 87303256 A EP87303256 A EP 87303256A EP 0256613 A3 EP0256613 A3 EP 0256613A3
Authority
EP
European Patent Office
Prior art keywords
transformer
blasting caps
primary winding
blasting
winding
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.)
Withdrawn
Application number
EP87303256A
Other languages
German (de)
French (fr)
Other versions
EP0256613A2 (en
Inventor
Louis-George Desrochers
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.)
PPG Architectural Coatings Canada Inc
Original Assignee
CIL Inc
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 CIL Inc filed Critical CIL Inc
Publication of EP0256613A2 publication Critical patent/EP0256613A2/en
Publication of EP0256613A3 publication Critical patent/EP0256613A3/en
Withdrawn legal-status Critical Current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)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

A plurality of electric blasting caps are fired through the ignition system which includes a transformer (19) having a primary winding (17) and a secondary winding (21). The secondary winding (21) of the transformer (19) is connected to the resistive elements (53) of the blasting caps (55) through a blasting circuit which is electromagnetically coupled to the resistive elements (53) of the blasting caps (55) via a small toroid transformer. A D.C. voltage is stored on a storage capacitor (3) which has one end connected to the center point (15) of the primary winding (17). The other ends of each half of the primary winding (17) are connected through a driver circuit (29) to ground. Each driver circuit (29) is enabled by a flip-flop (35) at predetermined intervals, whereby the storage capacitor (3) will discharge through the appropriate half of the primary, to thereby produce a pulse train at the output of the secondary. The pulse train provides the ignition power for igniting the electric blasting caps.
EP87303256A 1986-05-15 1987-04-14 Ignition system Withdrawn EP0256613A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000509201A CA1266522A (en) 1986-05-15 1986-05-15 Ignition system
CA509201 1986-05-15

Publications (2)

Publication Number Publication Date
EP0256613A2 EP0256613A2 (en) 1988-02-24
EP0256613A3 true EP0256613A3 (en) 1990-08-16

Family

ID=4133150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87303256A Withdrawn EP0256613A3 (en) 1986-05-15 1987-04-14 Ignition system

Country Status (9)

Country Link
EP (1) EP0256613A3 (en)
AU (1) AU595873B2 (en)
CA (1) CA1266522A (en)
FI (1) FI872066A (en)
GB (1) GB2190552B (en)
MX (1) MX161736A (en)
NO (1) NO872005L (en)
NZ (1) NZ219934A (en)
ZM (1) ZM3787A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2096415A (en) * 1980-12-11 1982-10-13 Ici Plc Detonator fibring circuit
EP0096482A2 (en) * 1982-06-03 1983-12-21 Imperial Chemical Industries Plc Apparatus for initiating explosions and method therefor
GB2132041A (en) * 1982-12-10 1984-06-27 Trolex Prod Ltd Energy-conserving detonator exploder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB933284A (en) * 1961-02-15 1963-08-08 Stone J & Co Ltd Improvements relating to inverter apparatus
GB1490768A (en) * 1975-05-19 1977-11-02 Ohba S High-output solid state dc-ac inverter with over load protection and control logic circuitry
GB2022222B (en) * 1978-05-24 1982-06-09 Ici Ltd Electric ignition of explosives

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2096415A (en) * 1980-12-11 1982-10-13 Ici Plc Detonator fibring circuit
EP0096482A2 (en) * 1982-06-03 1983-12-21 Imperial Chemical Industries Plc Apparatus for initiating explosions and method therefor
GB2132041A (en) * 1982-12-10 1984-06-27 Trolex Prod Ltd Energy-conserving detonator exploder

Also Published As

Publication number Publication date
NO872005L (en) 1987-11-16
GB2190552A (en) 1987-11-18
NZ219934A (en) 1990-03-27
AU595873B2 (en) 1990-04-12
GB8708957D0 (en) 1987-05-20
ZM3787A1 (en) 1988-10-28
AU7153087A (en) 1987-11-19
GB2190552B (en) 1990-04-18
FI872066A0 (en) 1987-05-11
MX161736A (en) 1990-12-20
NO872005D0 (en) 1987-05-14
CA1266522A (en) 1990-03-06
FI872066A (en) 1987-11-16
EP0256613A2 (en) 1988-02-24

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Inventor name: DESROCHERS, LOUIS-GEORGE