US3808975A - Ignition circuit for projectile fuses - Google Patents

Ignition circuit for projectile fuses Download PDF

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Publication number
US3808975A
US3808975A US00283354A US28335472A US3808975A US 3808975 A US3808975 A US 3808975A US 00283354 A US00283354 A US 00283354A US 28335472 A US28335472 A US 28335472A US 3808975 A US3808975 A US 3808975A
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US
United States
Prior art keywords
projectile
fuse
capacitor
cell
charge
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 - Lifetime
Application number
US00283354A
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English (en)
Inventor
D Stutzle
P Weidner
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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Filing date
Publication date
Application filed by Diehl GmbH and Co filed Critical Diehl GmbH and Co
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Publication of US3808975A publication Critical patent/US3808975A/en
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C13/00—Proximity fuzes; Fuzes for remote detonation

Definitions

  • ABSTRACT A projectile with an electrically ignitable fuse is pro-v vided with a control circuit in which piezo electric cells are provided which develop a potential upon acceleration of the projectile and then develop a reverse potential upon relaxing of the acceleration on the projectile when it emerges from the firing weapon.
  • the piezo electric cells are serially arranged and connected thereacross is a pair of condensers, the juncture of which is fastened to the juncture of the cells with one capacitor charging during the acceleration period of the projectile and the other charging during the relaxing period.
  • a resistor connected across the capacitors provides for reversing of the charge on the one capacitor and which reversing triggers a control circuit.
  • the control circuit releases the charge from a third capacitor which is charged by one of the cells during the relaxing period thereby to ignite the fuse.
  • An impact control source of voltage is also provided for igniting the fuse upon impact of the projectile.
  • the present invention relates to an electronic projectile fuse which is provided with a source of voltage, a reloading circuit, and an electronic switch arranged between the voltage source and the ignition means, said electronic switch being adapted to be controlled by means of an impact switch and/or the reloading circuit.
  • a fuse of the above identified type for instance, there is suggested between a first voltage source of a discharge circuit which voltage source is adapted to be charged with a definite charge during the firing, and a time element forming a reloading circuit, to provide a valve which through the intervention of an impact detector is pivotable into its switch-on position, and to connect to the outlet of the time element an ignition transfer element which only when reaching the minimum voltage required for switching through tilts into the turn-on position and discharges an ignition voltage source to the ignition means.
  • lt is, therefore, an object of the invention to provide an electronic fuse of the type disclosed which will have a low consumption of energy so that the charge required for controlling the circuits and for igniting the igniting means can be generated in a piezo electric or a magnetic generator which becomes effective during the firing.
  • the view of the drawing illustrates an ignition circuit for projectile fuses having features in accordance with the present invention.
  • the electric projectile fuse according to the present invention is characterized primarily in that the reloading circuit which in the form of a time element is located between a voltage source and a control member of the electronic switch comprises two condensers which are adapted to be charged by opposite potentials and different magnitude of charge, and also comprises a reloading resistor which interconnects the voltage poles of said condensers, while the voltage pole of the condenser which is adapted to be charged by a lower blocking charge is connected to the control inlet of the switch or its control part, and while the control part is so designed that after the reversing of the poles of the condenser will open the switch only when a voltage of a predetermined magnitude is attained at the input, which voltage is opposite to the blocking voltage.
  • piezo electric cells may be employed which are connected in such polarized condition and which through current direction-dependent elements communicate with the condensers of the reloading circuit, that the blocking charging condenser is adapted to be charged during the firing or acceleration phase, whereas the recharging condenser is adapted to be charged only in the relaxing phase.
  • piezo electric ceramic cells K1 and K2 serve as voltage source, which cells become positive at their outer cover in the pressure phase at the central pole and during the relaxing phase at their outer cover.
  • the charge of cell K] as produced during thepressure phase is short circuited through the intervention of a diode D2 or by a leakage resistance.
  • the charge generated during the relaxing phase passes through a diode D4 to a condenser C1.
  • the charge generated in cell K2 during the pressure phase passes through a diode D1 to a condenser C2 which, in its turn, is in series with the condenser C1.
  • the voltage poles of the condensers C1, C2, which voltage poles are connected to each other by a recharge resistor R1 first have an oppositely directed potential. A minus charge is applied to a joint A while a plus charge is applied to the joint B.
  • the piezo ceramic cells K1, K2 and- 'or by other means it will be assured that the charge at the condenser Cl is greater than that of the condenser C2.
  • the charge at the condenser Cl is introduced later.
  • the charge occurring on the cell K2 during the relaxing phase is available as ignition charge.
  • a condenser C3 is charged at least partially through the intervention of a diode D3.
  • an electronic thyristor (switch Th), and furthermore in series with the switch Th is an ignition means Z, for instance, in the form of an electrically ignitable ignition cap.
  • the switch Th is adapted to be controlled through, on one hand, by a piezo abutment cell P having arranged thereto in parallel a resistor R3, and also having a diode D5 arranged in series thereto and on the other hand is adapted to be controlled through by a control element which comprises two transistors T1, T2 and a resistor R2.
  • a zener diode ZD Arranged in parallel to the condenser C2 is a zener diode ZD.
  • a further diode D6 is in series to the zener diode.
  • the condenser C2 is charged in such a way that a minimum potential will prevail at the point A.
  • the charge generated at K1 is passed through the diode D2 or a resistor.
  • the positive charge generated at the outer pole of the cell K2 flows off through the diode D3 to the ignition charge condenser C3 and remains in part at the cell K2.
  • the condenser Cl is charged by cell Kl through the diode D4. At its point B a positive charge exists.
  • the condenser C2 receives a smaller charge than the condenser Cl which, for instance, has the same capacity as the condenser C2.
  • the charge on the condenser C2 is first equalized whereupon the point A moves into the positive range.
  • point A reaches the control voltage of the transistor T1 of, for instance, 0.6 volts, current will flow through T1.
  • the transistor T2 opens. Both transistors are controlled as to transmission.
  • the charge of the condenser Cl passes to the control inlet of the control thyristor Th.
  • the thyristor Th is switched through and discharges the condenser C3 to the ignition means Z.
  • the discharging time constant is determined substantially only by the capacity of the condenser C3 and the resistance of the ignition means Z. The energy available at the condenser C3 is thereby within a sufficiently short time conveyed to the ignition means Z.
  • the charge at the condenser C2 must be lower than that conveyed to the condenser C l.
  • the charging quantity which is made available by the cell K2 but as the case may be, is greater than is required at the condenser C2
  • it may be necessary under certain circumstances to withdraw the excessive charge through the zener diode ZD which is arranged in parallel with the condenser C2, in which instance the diode D6 arranged in series thereto will prevent the condenser C2 after its polarity reversal from discharging through the zener diode ZD and thus will prevent a switching of the transistors T1 and T2.
  • the time period is determined after which the fuse will carry out its decomposition.
  • the thyristor switch Th may by a current pulse be adapted to switch through which current impulse is furnished by the impact detector P, which may be in the form of a piezo electric cell.
  • the diode D5 is intended to separate the circuits from each other, which means they prevent a rearward discharge, for instance, through the resistor R3 forming a leakage resistance and being arranged in parallel to the cell P.
  • the electronic switch Th is switched through in the same manner as by the reversing circuits C 1, C2, R1.
  • the condenser C3 and/or the charge of cell K2 are discharged through diode D3 and switch Th to the ignition means Z.
  • An igniting system for an electrically operated projectile fuse comprising; a voltage source and circuit means connecting the voltage source to said fuse, said voltage source developing voltage pulses upon acceleration of the projectile containing the fuse, said circuit means comprising a time controlled charge reversing circuit connected to said source, control means connected to said charge reversing circuit and actuated thereby at the expiration of the time period pertaining to said reversing circuit, and means connecting said control means to said fuse for igniting the fuse by said control means upon actuation thereof, said voltage source comprising a pair of piezo electric cells in serial relation with a common center terminal, said charge reversing circuit comprising a capacitor connected across each cell and a resistor connected in parallel with said capacitors, and diode means interposed between said cells and the respective capacitors and so poled that one cell charges its capacitor during the acceleration period of the projectile while the other cell charges its capacitor following the acceleration period of the projectile.
  • circuit means includes a further capacitor adapted to be charged by said one cell at the end of said acceleration period of the projectile and connected to said fuse, said control means when actuated releasing the charge on said further capacitor to said fuse to ignite the fuse.
  • An igniting system which includes a zener diode connected in parallel with the capacitor pertaining to said one cell to limit the voltage rise thereof during the acceleration period of said projectile to a value less than that supplied to the capacitor pertaining to said other cell following the acceleration period of said projectile.
  • An igniting system which includes a diode in series with said zener diode and poled to prevent discharge of the capacitor pertaining to said one cell following the acceleration period of said projectile.
  • An igniting system which includes an impact sensitive voltage source connected to said fuse and operable to supply igniting voltage to said fuse upon impact of said projectile.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Electronic Switches (AREA)
US00283354A 1971-08-28 1972-08-24 Ignition circuit for projectile fuses Expired - Lifetime US3808975A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2143119A DE2143119C3 (de) 1971-08-28 1971-08-28 Elektrischer Geschoßzünder

Publications (1)

Publication Number Publication Date
US3808975A true US3808975A (en) 1974-05-07

Family

ID=5818024

Family Applications (1)

Application Number Title Priority Date Filing Date
US00283354A Expired - Lifetime US3808975A (en) 1971-08-28 1972-08-24 Ignition circuit for projectile fuses

Country Status (9)

Country Link
US (1) US3808975A (de)
BE (1) BE786968A (de)
CH (1) CH556017A (de)
DE (1) DE2143119C3 (de)
FR (1) FR2158797A5 (de)
GB (1) GB1358214A (de)
IT (1) IT964055B (de)
NL (1) NL7209655A (de)
SE (1) SE376793B (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137851A (en) * 1976-11-25 1979-02-06 Diehl Gmbh & Co. Electronic ignition circuit
US4141298A (en) * 1976-11-25 1979-02-27 Diehl Gmbh & Co. Electronic ignition circuit
US5269223A (en) * 1992-10-06 1993-12-14 Ems-Patvag Piezoelectric fuse system with safe and arm device for ammunition
US6865989B2 (en) * 2000-04-22 2005-03-15 Honeywell Ag Electronic self-destruct device
US20090013891A1 (en) * 2007-07-10 2009-01-15 Omnitek Partners Llc Electrically Initiated Inertial Igniters for Thermal Batteries and the Like
US20120180681A1 (en) * 2007-07-10 2012-07-19 Omnitek Partners Llc Inertially Operated Electrical Initiation Methods
US20120180680A1 (en) * 2007-07-10 2012-07-19 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20120180682A1 (en) * 2007-07-10 2012-07-19 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20120210896A1 (en) * 2007-07-10 2012-08-23 Omnitek Partners Llc Electrically Initiated Inertial Igniters for Thermal Batteries and the Like
US20130174754A1 (en) * 2007-07-10 2013-07-11 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20130174756A1 (en) * 2007-07-10 2013-07-11 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20130180423A1 (en) * 2007-07-10 2013-07-18 Omnitek Partners Llc Shock Detection Circuit and Method of Shock Detection
US20140060366A1 (en) * 2007-07-10 2014-03-06 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20140202350A1 (en) * 2007-07-10 2014-07-24 Omnitek Partners Llc Inertially Operated Piezoelectric Energy Harvesting Electronic Circuitry
US9001626B1 (en) * 2011-03-11 2015-04-07 Rockwell Collins, Inc. Piezoelectric acceleration timer
US20150331008A1 (en) * 2007-07-10 2015-11-19 Omnitek Partners Llc Piezoelectric-Based Multiple Impact Sensors and Their Electronic Circuitry
US20170133954A1 (en) * 2007-07-10 2017-05-11 Omnitek Partners Llc Manually Operated Piezoelectric Energy Harvesting Electronic Circuitry
US20190003810A1 (en) * 2008-06-29 2019-01-03 Omnitek Partners Llc Inertially Operated Piezoelectric Energy Harvesting Electronic Circuitry
US10447179B2 (en) * 2007-07-10 2019-10-15 Omnitek Partners Llc Inertially operated piezoelectric energy harvesting electronic circuitry
US11248893B2 (en) * 2008-06-29 2022-02-15 Omnitek Partners Llc Inertially operated piezoelectric energy harvesting electronic circuitry

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2539541C2 (de) * 1975-09-05 1982-05-13 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Schaltung für einen elektrischen Geschoßzünder
CH608604A5 (de) * 1977-09-16 1979-01-15 Oerlikon Buehrle Ag
GB8622806D0 (en) * 1986-09-23 1987-02-04 Royal Ordnance Plc Detonation fuzes

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397329A (en) * 1964-10-19 1968-08-13 Endevco Corp Measuring system
US3670653A (en) * 1963-10-16 1972-06-20 Us Navy Self-powered fuze firing system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670653A (en) * 1963-10-16 1972-06-20 Us Navy Self-powered fuze firing system
US3397329A (en) * 1964-10-19 1968-08-13 Endevco Corp Measuring system

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137851A (en) * 1976-11-25 1979-02-06 Diehl Gmbh & Co. Electronic ignition circuit
US4141298A (en) * 1976-11-25 1979-02-27 Diehl Gmbh & Co. Electronic ignition circuit
US5269223A (en) * 1992-10-06 1993-12-14 Ems-Patvag Piezoelectric fuse system with safe and arm device for ammunition
US6865989B2 (en) * 2000-04-22 2005-03-15 Honeywell Ag Electronic self-destruct device
US20140060366A1 (en) * 2007-07-10 2014-03-06 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20140202350A1 (en) * 2007-07-10 2014-07-24 Omnitek Partners Llc Inertially Operated Piezoelectric Energy Harvesting Electronic Circuitry
US20120180681A1 (en) * 2007-07-10 2012-07-19 Omnitek Partners Llc Inertially Operated Electrical Initiation Methods
US20120180680A1 (en) * 2007-07-10 2012-07-19 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20120180682A1 (en) * 2007-07-10 2012-07-19 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20120210896A1 (en) * 2007-07-10 2012-08-23 Omnitek Partners Llc Electrically Initiated Inertial Igniters for Thermal Batteries and the Like
US8286554B2 (en) * 2007-07-10 2012-10-16 Omnitek Partners Llc Electrically initiated inertial igniters for thermal batteries and the like
US20130174754A1 (en) * 2007-07-10 2013-07-11 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20130174756A1 (en) * 2007-07-10 2013-07-11 Omnitek Partners Llc Inertially Operated Electrical Initiation Devices
US20130180423A1 (en) * 2007-07-10 2013-07-18 Omnitek Partners Llc Shock Detection Circuit and Method of Shock Detection
US8596198B2 (en) * 2007-07-10 2013-12-03 Omnitek Partners Llc Inertially operated electrical initiation methods
US8601949B2 (en) * 2007-07-10 2013-12-10 Omnitek Partners Llc Inertially operated electrical initiation devices
US20090013891A1 (en) * 2007-07-10 2009-01-15 Omnitek Partners Llc Electrically Initiated Inertial Igniters for Thermal Batteries and the Like
US8677900B2 (en) * 2007-07-10 2014-03-25 Omnitek Partners Llc Inertially operated electrical initiation devices
US8776688B2 (en) * 2007-07-10 2014-07-15 Omnitek Partners Llc Electrically initiated inertial igniters for thermal batteries and the like
US8042469B2 (en) * 2007-07-10 2011-10-25 Omnitek Partners Llc Electrically initiated inertial igniters for thermal batteries and the like
US10581347B2 (en) * 2007-07-10 2020-03-03 Omnitek Partners Llc Manually operated piezoelectric energy harvesting electronic circuitry
US9021955B2 (en) * 2007-07-10 2015-05-05 Omnitek Partners Llc Inertially operated electrical initiation devices
US9097502B2 (en) * 2007-07-10 2015-08-04 Omnitek Partners Llc Inertially operated electrical initiation devices
US20150331008A1 (en) * 2007-07-10 2015-11-19 Omnitek Partners Llc Piezoelectric-Based Multiple Impact Sensors and Their Electronic Circuitry
US9194681B2 (en) * 2007-07-10 2015-11-24 Omnitek Partners Llc Inertially operated electrical initiation devices
US9470497B2 (en) * 2007-07-10 2016-10-18 Omnitek Partners Llc Inertially operated piezoelectric energy harvesting electronic circuitry
US9587924B2 (en) * 2007-07-10 2017-03-07 Omnitek Partners Llc Shock detection circuit and method of shock detection
US20170133954A1 (en) * 2007-07-10 2017-05-11 Omnitek Partners Llc Manually Operated Piezoelectric Energy Harvesting Electronic Circuitry
US9910060B2 (en) * 2007-07-10 2018-03-06 Omnitek Partners Llc Piezoelectric-based multiple impact sensors and their electronic circuitry
US10447179B2 (en) * 2007-07-10 2019-10-15 Omnitek Partners Llc Inertially operated piezoelectric energy harvesting electronic circuitry
US20190003810A1 (en) * 2008-06-29 2019-01-03 Omnitek Partners Llc Inertially Operated Piezoelectric Energy Harvesting Electronic Circuitry
US10598473B2 (en) * 2008-06-29 2020-03-24 Omnitek Partners Llc Inertially operated piezoelectric energy harvesting electronic circuitry
US11248893B2 (en) * 2008-06-29 2022-02-15 Omnitek Partners Llc Inertially operated piezoelectric energy harvesting electronic circuitry
US9001626B1 (en) * 2011-03-11 2015-04-07 Rockwell Collins, Inc. Piezoelectric acceleration timer

Also Published As

Publication number Publication date
IT964055B (it) 1974-01-21
BE786968A (fr) 1972-11-16
CH556017A (de) 1974-11-15
DE2143119B2 (de) 1977-01-20
DE2143119C3 (de) 1979-03-22
NL7209655A (de) 1974-04-25
GB1358214A (en) 1974-07-03
FR2158797A5 (de) 1973-06-15
DE2143119A1 (de) 1973-05-10
SE376793B (sv) 1975-06-09

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