US2889776A - Method and device for the generation of impulses in electric detonators - Google Patents

Method and device for the generation of impulses in electric detonators Download PDF

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Publication number
US2889776A
US2889776A US605249A US60524956A US2889776A US 2889776 A US2889776 A US 2889776A US 605249 A US605249 A US 605249A US 60524956 A US60524956 A US 60524956A US 2889776 A US2889776 A US 2889776A
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Prior art keywords
magnet
impulses
generation
magnetic circuit
electric detonators
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Expired - Lifetime
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US605249A
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Gunther Ulrich
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Inventa AG fuer Forschung und Patentverwertung
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Inventa AG fuer Forschung und Patentverwertung
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Priority to US605249A priority Critical patent/US2889776A/en
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/04—Electric fuzes with current induction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K39/00—Generators specially adapted for producing a desired non-sinusoidal waveform

Description

June 1959 u. GUNTHER 2,889,776
METHOD AND DEVICE- FOR THE GENERA N OF IMPULSE N ELEC c DETONAT F d Aug. 195s VAR/CH GUAI'Z'HEE ahead 261w United States Patent Ofifice Patented June 9, 1959 METHOD AND DEVICE FOR THE GENERATION F IMPULSES IN ELECTRIC DETONATORS Ulrich Gunther, Zurich, Switzerland,
A.G. Fuer Forschung Switzerland assignor to Inventa und Patentverwertung, Zurich,
It is known that by varying the rate of passage of magnetic flux in a coil there is produced an electric potential which may be employed to charge a condenser, as long as care is taken to again disconnect the condenser from the coil at the same time that the highest potential is reached. The extent of the potential generated in the coil for a given size of a magnet and spool is dependent only on the rate of change of the magnetic flux in the coil.
In the various applications of these systems, as for example in electrical detonators for ammunition shells, the energy made available is, in many instances, insulficient to achieve a sufliciently quick change of current flow. In consequence, the potential carried over to the condenser is smaller than that required for ignition.
It is an object of the present invention to provide a generator for the production of high induction potentials by interrupting a magnetic circuit. This object is effected by introducing a small quantity of explosive material into the magnetic circuit in such a manner that the explosive will interrupt the magnetic circuit at the time of ignition with very great speed, thus eflecting a high potential in the induction coil.
To open the magnetic circuit, a simple mechanical means may be employed by forming a gap in the magnetic circuit; however, the magnetic circuit may also be opened by demolishing a part of the magnet by means of an explosive charge, whereby the magnetic flux may likewise be interrupted.
The apparatus according to the invention will now be more fully described with reference to the accompanying drawing, but it should be understood that this is given by way of illustration and not of limitation, and that many changes in the details can be made the spirit of the invention.
In the drawing, the figure of the drawing shows, by way of example, a current generator according to the invention. There are indicated: the magnet 1, the magnet armature 2, the induction coil 3, a small explosive charge 4, which is disposed in an opening of one of the magnet legs and a striking pin 5.
The operation of the current generator according to the present invention is as follows:
Upon impact with a target the striking pin 5 strikes the primer charge 4, thereby exploding the latter. As a result of this explosion there follows an interruption in the magnetic flux which was built up by means of magnet 1 and armature 2, either because of the partial destruction of magnet 1, the armature 2, or the separation of armature 2 from the magnet. A surge of induction current results in coil 3 due to this interruption, which may serve to either ignite a primer or percussion cap directly through a filament, or which may be employed to charge a condenser.
What I claim is:
A generator for the production of high induction potential for the ignition of electrically ignitable fuses by the interruption of a magnetic circuit, comprising a U-shaped permanent magnet formed with a pair of spaced legs, an induction coil wound about one of said legs, -a permanent magnet armature detachably connecting said legs, the other of said legs having a bore extending therethrough, an explosive charge in said bore adjacent said armature and a striking pin displaceably mounted in said bore, said striking pin being adapted, upon impact with a target, to strike and detonate said explosive charge, so that upon the detonation of said charge, said other leg of the magnet is destroyed and said armature separated from the magnet, thereby interrupting the magnetic circuit of said magnet and producing an instantaneous high induction potential in said induction coil.
without departing from References Cited in the file of this patent UNITED STATES PATENTS 2,544,077 Gardner Mar. 6, 1951 FOREIGN PATENTS 899,606 Germany Dec. 14, 1953
US605249A 1955-08-23 1956-08-21 Method and device for the generation of impulses in electric detonators Expired - Lifetime US2889776A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US605249A US2889776A (en) 1955-08-23 1956-08-21 Method and device for the generation of impulses in electric detonators

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH812400X 1955-08-23
US605249A US2889776A (en) 1955-08-23 1956-08-21 Method and device for the generation of impulses in electric detonators

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US2889776A true US2889776A (en) 1959-06-09

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348079A (en) * 1965-03-23 1967-10-17 Charles N Mckinnon Pulse magnetohydrodynamic generator
US4335655A (en) * 1980-03-25 1982-06-22 United States Of America As Represented By The Secretary Of The Army Method and apparatus for detonating explosive in response to detonation of remote explosive
US5125104A (en) * 1990-05-09 1992-06-23 General Atomics Electromagnetic pulse generator for use with exploding material
US20080047450A1 (en) * 2002-12-19 2008-02-28 Peter Lockhart Classified
US20100097166A1 (en) * 2008-10-16 2010-04-22 Claus-Peter Hasel Solenoid and actuating element with solenoid

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544077A (en) * 1948-07-24 1951-03-06 Charles B Gardner Projectile-actuated surge generator
DE899606C (en) * 1942-04-21 1953-12-14 Steatit Magnesia Akteignesells Magnetic circuit for generating electrical power through the action of mechanical forces

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE899606C (en) * 1942-04-21 1953-12-14 Steatit Magnesia Akteignesells Magnetic circuit for generating electrical power through the action of mechanical forces
US2544077A (en) * 1948-07-24 1951-03-06 Charles B Gardner Projectile-actuated surge generator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348079A (en) * 1965-03-23 1967-10-17 Charles N Mckinnon Pulse magnetohydrodynamic generator
US4335655A (en) * 1980-03-25 1982-06-22 United States Of America As Represented By The Secretary Of The Army Method and apparatus for detonating explosive in response to detonation of remote explosive
US5125104A (en) * 1990-05-09 1992-06-23 General Atomics Electromagnetic pulse generator for use with exploding material
US20080047450A1 (en) * 2002-12-19 2008-02-28 Peter Lockhart Classified
US20100097166A1 (en) * 2008-10-16 2010-04-22 Claus-Peter Hasel Solenoid and actuating element with solenoid
US8138870B2 (en) * 2008-10-16 2012-03-20 Svm Schultz Verwaltungs-Gmbh & Co. Kg Solenoid and actuating element with solenoid

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