US3496829A - Electronic cadence control for automatic firearms - Google Patents

Electronic cadence control for automatic firearms Download PDF

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Publication number
US3496829A
US3496829A US682370A US3496829DA US3496829A US 3496829 A US3496829 A US 3496829A US 682370 A US682370 A US 682370A US 3496829D A US3496829D A US 3496829DA US 3496829 A US3496829 A US 3496829A
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United States
Prior art keywords
switch
pulses
cadence
firing
electronic
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Expired - Lifetime
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US682370A
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English (en)
Inventor
Bernd Heuser
Werner Hilgers
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Rheinmetall Industrie AG
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Rheinmetall GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/58—Electric firing mechanisms
    • F41A19/64—Electric firing mechanisms for automatic or burst-firing mode
    • F41A19/66—Electronic shot-velocity control

Definitions

  • the settable pulse repetition rate of the square wave generator is equal to the desired cadence and its pulses are transformed into pulses of frequency-independent and constant duration, respectively, so that the pulses obtained from the ascending branches of the pulses lead to a switching on of the electromagnet and the pulses obtained from the descending branches of the pulses lead to a switching off of the electromagnet.
  • the present invention relates to an electronic cadence control for controlled firing of automatic fire arms, the firing of which takes place by means of an electromagnet, as well as to an electronic cadence control device.
  • the control designed in accordance with the present invention is particularly adapted for automatic guns.
  • an electromotor rotates with set or a variable number of revolutions over a circular path with a predetermined number of individual contacts, whereby each contact connection releases a shot.
  • the shock and blow sensitivity is reduced.
  • the structural elements By suitable election of the structural elements, furthermore, the sensitivity against variations in the tension and temperature can be removed to a great extent and the retardation time can be chosen neglectibly small, compared with the time required for one shot.
  • the square wave generator comprises preferably a Miller-integrator with a following threshold stage. In: this switching arrangement, one obtains square wave pulses with very steep slopes. From these ascending and descending slopes one obtains the switching on and the switching off pulses, after the pulses have been brought to a constant duration by a mono-stable multivibrator by means of differentiating into a differential circuit.
  • a push button switch is provided and the fire arm starts operation upon operating the push button switch.
  • a flip-flop is provided which, upon pushing down the push button switch, switches over and starts operation of the square wave generator.
  • the Miller integrator and the following threshold stage can be designed in conventional manner, whereby the rate is preferably determined by an RC-time constant.
  • one of the structural elements for instance, the resistance, can be adjustably continuous or stepwise. In case of a continuous adjustment, suitably a multiplex potentiometer is used, the scale of which can be gauged in accordance with the set rate and cadence, respectively.
  • the duration of the starting pulses of the square wave generator depends, as a matter of course, upon the rate, since the set pulse width/repetition ratio does not vary in case of a frequency change.
  • a mono-stable multivibrator follows the square wave generator.
  • pulses are produced by means of a differentiator member following a pre-amplifier, which pulses serve the control of the electronic power switch (Thyristor), which switches on the electro-magnet.
  • Thyristor electronic power switch
  • the timely succession of switch-on pulses and compulsory switch-off pulses is determined by the maximum desired switch-on time of the electro-magnet, the timely succession of both these pulses must be correspondingly settable constant corresponding to the prevailing conditions. This is in this case assured such, that the switch-on pulse is gained from the rising slope and the compulsory switch-off pulse from the falling slope of a square wave pulse of constantly settable length.
  • the duration of the compulsory switch-off pulse is determined by a further mono stable sweep stage.
  • the fire arm must be also capable of providing continuous firing and individual firing. For this reason, a selector switch is provided, whereby, in the position control single fire, the previously described switching procedures take place. In the switch-over position single firing, only one single pulse is fed to the differentiator circuit, independently from the operation duration of the push button switch. During the switchover position continuous firing the switch-on Thyristor is continuously controlled and the fire arm works with the cadence, which is preset by the breech block times of the arms.
  • a burst control device which is designed in accordance with the present invention, is divided suitably into individual constructional groups or structural units, whereby, for instance, one constructional group can be provided as a service device, a second as control step, a third as output stage, a fourth for the current feed, and a fifth for the fuses.
  • This division according to the functions is recommended also for the reason, because it is often desirable or required that the individual constructional groups are disposed in spacial separation from each other, and the connections are brought about by longer or shorter cables.
  • the structural unit servicing, on the one hand, and the structural units control, output, current feeding, fuses, on the other hand can be provided in housings connected with each other by cables. A further cable connection can lead to the electro-magnet provided of course on the fire arm itself.
  • the servicing structural unit can contain, for instance, the required selector switches, indicator lamps, the pushbutton switch and the setting potentiometer and, furthermore, also a connection for a burst control device. It is preferred to provided a key switch, without which the device cannot be rendered operative.
  • connections can be provided, preferably on the structural output unit, for the conventional end switches of the ammunition boxes, in order to switch-over from the right to the left ammunition box, as soon as it is required, and vice versa.
  • This arrangement is suitable, when the fire arm is arranged for ammunition feed from right and left.
  • FIGURE 1 is a schematic spacial arrangement of the individual structural groups
  • FIG. 2 discloses the operating connections in the case of the switch position controlled individual fire
  • FIG. 3 discloses the switching together of the firing magnet with the switch-on and the switch-off Thyristor
  • FIG. 4 is a diagrammatic showing of the time versus pulse diagram for the firing method controlled individual fire.
  • the unit comprises a control device 1, a voltage source 2, a service device 3 and a firing magnet 4.
  • the control device 1 is divided into individual structural groups or units which are individually exchangeable and are connected together by means of multi-polar plugs, whereby the plug connections are preferably disconnected by withdrawl of the individual structural groups or units.
  • the structural groups comprise voltage supplies 11, fuse unit 12, output unit 13 and a control unit 14.
  • the voltage source is connected with the voltage supply, the control unit with the service device and the output stage with the firing magnet.
  • the service device has also a terminal 31 or a burst control device, and the terminals 131 and 132 for the end switch of the ammunition boxes are disposed on the output unit.
  • the selector switch for single fire, controlled single fire, and duration fire are disposed on the servicing device.
  • a selector switch ammunition box right, ammunition box left, and magazine can be provided. In the first two positions of the selector switch, only the particular ammunition box is used, while in the position magazine, the ammunition status is not controlled.
  • FIG. 2 shows schematically the connections of the unit in case of the firing modus controlled single fire is selected.
  • the push button switch 51 switches the flip-flop 52, which acts as a switch amplifier for rendering ineffective any contact bouncing.
  • the flip-flop is set, in other words, as long as the push button switch is pressed down, the square wave generator 53 runs free with a pulse rate determined by the setting of the potentiometer, which pulse rate corresponds to the firing cadence. Since in response to a pulse rate variation the output pulse length varies, too, a mono-stable multivibrator 54 is provided, the output pulse length of which multivibrator 54 is substantially independent from the pulse rate.
  • output pulses are fed, on the one hand, to a differentiator 56 by means of the amplifier 55.
  • These amplified and differentiated square wave pulses are in turn fed to a switch-on Thyristor 57 which fires in response thereupon, thus closing the solenoid circuit.
  • the output pulses of the monostable multivibrator 54 are fed to an inverter stage 58, so that the length of the output pulses is equal to the pause between two output pulses of the monostable multivibrator.
  • the upper limit of the controllable firing succession is determined solely by the fire arm (advance and return stroke time) and by the at tracting time of the magnet. correspondingly, the maximum cadence is to be set which can be selected with the settable potentiometer. Consequently, it lies lower than the duration firing cadence.
  • the square wave generator consisting of a Miller integrator with the following threshold stage is set for output frequencies between 0.003 c.p.s. and 20 c.p.s. at a pulse versus pause ratio of 1:1.
  • a lowest settable cadence of about 10 shots per hour would be feasible.
  • FIG. 3 shows schematically the interconnection of the solenoid with the switch-on and switch-off Thyristor.
  • the circuit operates in the following manner: The firing of a switch-on Thyristor 57 closes the circuit which contains the solenoid 41 and the capacitor 40 is charged by the line voltage, so that the plate 1 carries positive potential.
  • the capacitor 40 is connected in parallel relation with respect to the switch-on Thyristor 57, so that the voltage across the capacitor 40 acts as locking voltage for the latter. Thereby, the Thyristor 57 is switched off and the solenoid circuit is interrupted.
  • the capacitor 40 is re-charged but, however, so that a positive potential occurs now on the plate 2, current flowing via the resistor 39.
  • the operation is correspondingly similar and applies also when the switch-on Thyristor is again fired.
  • the respective stages are preferably provided with conventional semi-conductor circuits, the design and operation of which are not subject matter of the present invention, but instead their interconnection and interaction.
  • An electronic cadence control for controlled individual shots from automatic fire arms, the firing of which is performed by operation of an electromagnet, comprismg a square wave generator
  • the settable pulse rate of said square wave generator being equal to the desired cadence and its pulses being transformed into pulses of rate-independent and constant length, respectively, so that said pulses obtained from the rising slopes of said pulses lead to a switch-on of said electromagnet and said pulses obtained from the falling slopes of said pulses lead to a switch-off of said electromagnet,
  • said pulse formed stage comprising a flip-flop with settable constant output pulse length, a selector switch for single shots, controlled single shots, and permanent firing being provided, and
  • the electronic cadence control as set forth in claim 1, which includes a bistable multivibrator, and
  • said flip-flop switches over upon operation of said push button switch and starts operation of said square wave impulse generator.
  • the electronic cadence control as set forth in claim 1, wherein the setting of the pulse rate of said square wave generator takes place in steps by switching over. 4.
  • the electronic cadence control as set forth in claim 1, wherein the setting of said pulse rate of said square wave generator takes place infinitely variably by means of a multiplex potentiometer.
  • the electronic cadence control as set forth in claim 1, wherein said square ware generator comprises a Miller-integrator with a following limit value step. 6.
  • the electronic cadence control as set forth in claim 1, wherein said switch-on pulses and said switch-01f pulses are obtained by differentiating of said pulses of constant length, and which includes, a Thyristor for each and controlled by said pulses, and said pulses causes the switch-on-and-otf of said electromagnet by means of said Thyristors.
  • the electronic cadence control as set forth in claim 1, which includes a monostable stage, and the duration of said switch off pulse is rigidly preset by said monostable stage.
  • the electronic cadence control as set forth in claim 1, wherein in the switch-over position permanent firing upon operation of said pushbutton switch said switch-on Thryistor is permanently controlled, and the cadence of the fire arm is determined only by the forward stroke and return stroke of the breech block.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Relay Circuits (AREA)
US682370A 1966-11-10 1967-11-13 Electronic cadence control for automatic firearms Expired - Lifetime US3496829A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER0044553 1966-11-10

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US3496829A true US3496829A (en) 1970-02-24

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US682370A Expired - Lifetime US3496829A (en) 1966-11-10 1967-11-13 Electronic cadence control for automatic firearms

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US (1) US3496829A (de)
CH (1) CH458130A (de)
DE (1) DE1578411C3 (de)
GB (1) GB1187816A (de)
NL (1) NL6714936A (de)
SE (1) SE313516B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007036457B3 (de) * 2007-08-01 2009-01-02 Oerlikon Contraves Ag Verfahren und Anordnung zur variablen Schussauslösung bei einer Revolverkanone
NO20090261A (no) * 2009-01-16 2010-03-22 Kongsberg Defence & Aerospace As Elektronisk avfyringstakter for fjernbetjening av et automatvåpen.
US20100237147A1 (en) * 2007-09-27 2010-09-23 Rheinmetall Waffe Munition Gmbh Method and device for controlling the cadence of an automatic weapon
US20110197749A1 (en) * 2009-01-16 2011-08-18 Kongsberg Defence & Aerospace As Electronic firing rate controller for remote operation of an automatic firing weapon.
EP2208958A3 (de) * 2009-01-16 2014-04-16 Kongsberg Defence & Aerospace AS Elektronisches Abfeuerungstaktkontrollgerät für Fernbedienung von einer automatischen Feuerwaffe
EP2865985A1 (de) * 2013-10-25 2015-04-29 NEXTER Systems Feuerleitungsverfahren einer gasdruckladenden Feuerwaffe und Feuerleitungseinrichtung mit einem solchen Verfahren
RU2818736C1 (ru) * 2023-11-08 2024-05-03 Акционерное общество "Уральское конструкторское бюро транспортного машиностроения" (АО "УКБТМ") Способ стрельбы автоматического вооружения с отсечкой и устройство отсечки очереди

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143665A (en) * 1961-04-17 1964-08-04 Rotax Ltd Silicon control rectifier switching circuit having variable delay
US3260864A (en) * 1964-09-01 1966-07-12 Hewlett Packard Co Variable delay time pulse generator
US3263565A (en) * 1962-10-31 1966-08-02 Anthony J Dragonetti Rotating cluster type rocket launcher
US3331284A (en) * 1966-02-04 1967-07-18 Jr Frank H Case Electrical control system for recoilless cannon
US3373297A (en) * 1965-02-09 1968-03-12 Army Usa Silicon controlled rectifier lock-up proof flip-flop

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143665A (en) * 1961-04-17 1964-08-04 Rotax Ltd Silicon control rectifier switching circuit having variable delay
US3263565A (en) * 1962-10-31 1966-08-02 Anthony J Dragonetti Rotating cluster type rocket launcher
US3260864A (en) * 1964-09-01 1966-07-12 Hewlett Packard Co Variable delay time pulse generator
US3373297A (en) * 1965-02-09 1968-03-12 Army Usa Silicon controlled rectifier lock-up proof flip-flop
US3331284A (en) * 1966-02-04 1967-07-18 Jr Frank H Case Electrical control system for recoilless cannon

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007036457B3 (de) * 2007-08-01 2009-01-02 Oerlikon Contraves Ag Verfahren und Anordnung zur variablen Schussauslösung bei einer Revolverkanone
EP2020584A2 (de) 2007-08-01 2009-02-04 Oerlikon Contraves Ag Verfahren und Anordnung zur Schussauslösung bei einer Revolverkanone
US20100237147A1 (en) * 2007-09-27 2010-09-23 Rheinmetall Waffe Munition Gmbh Method and device for controlling the cadence of an automatic weapon
US8225999B2 (en) 2007-09-27 2012-07-24 Rheinmetall Waffe Munition Gmbh Method and device for controlling the cadence of an automatic weapon
NO20090261A (no) * 2009-01-16 2010-03-22 Kongsberg Defence & Aerospace As Elektronisk avfyringstakter for fjernbetjening av et automatvåpen.
US20110197749A1 (en) * 2009-01-16 2011-08-18 Kongsberg Defence & Aerospace As Electronic firing rate controller for remote operation of an automatic firing weapon.
US8015911B2 (en) * 2009-01-16 2011-09-13 Kongsberg Defence & Aerospace As Electronic firing rate controller for remote operation of an automatic firing weapon
EP2208958A3 (de) * 2009-01-16 2014-04-16 Kongsberg Defence & Aerospace AS Elektronisches Abfeuerungstaktkontrollgerät für Fernbedienung von einer automatischen Feuerwaffe
EP2865985A1 (de) * 2013-10-25 2015-04-29 NEXTER Systems Feuerleitungsverfahren einer gasdruckladenden Feuerwaffe und Feuerleitungseinrichtung mit einem solchen Verfahren
FR3012593A1 (fr) * 2013-10-25 2015-05-01 Nexter Systems Procede de commande de tir d'une arme a feu a emprunt de gaz et dispositif mettant en oeuvre un tel procede
RU2818736C1 (ru) * 2023-11-08 2024-05-03 Акционерное общество "Уральское конструкторское бюро транспортного машиностроения" (АО "УКБТМ") Способ стрельбы автоматического вооружения с отсечкой и устройство отсечки очереди

Also Published As

Publication number Publication date
GB1187816A (en) 1970-04-15
DE1578411B2 (de) 1974-10-10
CH458130A (de) 1968-06-15
DE1578411A1 (de) 1970-09-17
NL6714936A (de) 1968-05-13
DE1578411C3 (de) 1975-05-28
SE313516B (de) 1969-08-11

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