US3750586A - Firing device - Google Patents
Firing device Download PDFInfo
- Publication number
- US3750586A US3750586A US00156679A US3750586DA US3750586A US 3750586 A US3750586 A US 3750586A US 00156679 A US00156679 A US 00156679A US 3750586D A US3750586D A US 3750586DA US 3750586 A US3750586 A US 3750586A
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- US
- United States
- Prior art keywords
- firing
- detonating
- coupled
- explosive
- explosive 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
Links
- 238000010304 firing Methods 0.000 title claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 239000002360 explosive Substances 0.000 claims description 25
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000005474 detonation Methods 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 241001057495 Neda Species 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003248 secreting effect Effects 0.000 description 1
Images
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C11/00—Electric fuzes
Definitions
- ABSTRACT A firing device having an anti-disturbance firing mechanism; a lead short, shunt, or open circuit firing mechanism; and an operator actuated switch firing mechanism, wherein each of said firing mechanisms is capable of causing detonation of a squib.
- the power supply and the operator actuated arm/disarm and firing switch and ready lamp are included in a control unit remote from the squib housing.
- the present invention is a remotely actuable, uncompromiseable, but disarmable, firing device. It consists of a remotely located, control unit coupled to a squib and squib detonating circuit located at the explosive device.
- the control unit includes an arm/disarm switch, an operator actuated firing switch, and a ready lamp.
- the squib detonating circuit includes a firing capacitor, an anti-disturbance firing mechanism, and a silicon controlled rectifier (SCR) with associated passive components.
- FIG. I is a block diagram of the present invention.
- FIG. 2 is a schematic diagram of the present invention.
- the present invention is shown in block diagram form in FIG. I It includes a power supply M, a remote control unit 10, a squib detonating circuit 12, and a squib 28.
- the remote control unit 10 comprises an arm/disarm switch 16 coupled to the power supply 14, a ready lamp circuit 18 coupled to switch 16, and an operator actuated firing switch 20 coupled to circuit 18.
- Remote control unit 10 is coupled through long lead coupler 22 to squib detonating circuit 12.
- the squib detonating circuit comprises anti-disturbance firing mechanism 24 and firing circuit 26.
- Squib 28 is coupled to the output of firing circuit 26.
- FIG. 2 The schematic diagram of the preferred embodiment of the present invention is shown in FIG. 2, wherein like numerals are used to indicate the component composition of the blocks of FIG. 1.
- Remote control unit 1 taken alone, includes lamp L, connected in series with resistor R, to the collector, and in parallel with the operator actuated firing switch 20 connected between the lamp and base, of NPN transistor 0,; and the combination coupled in parallel with capacitor C, to arm/- disarm switch 16.
- transistor Q can be replaced with a PNP transistor if the circuit is appropriately modified, as is well known in the art.
- Squib detonating circuit 12 comprises antidisturbance firing mechanism 24 and firing circuit 26.
- SCR silicon controlled rectifier
- Squib 28 will then detonate if any of the following occurs: (a) squib detonating circuit 12 is disturbed causing anti-disturbance firing mechanism 24 to close, (bl the long leads connected to coupler 22 are shorted, shunted, or open circuited, or (c) operator actuated firing switch 20 is closed. All of the firing actions caused the voltage difference between points A and B to approach zero, which causes silicon controlled rectifier O to turn on and conduct. Thereby, capacitor C is discharged through silicon controlled rectifier Q, and squib 28. As a result, squib 28 is fired.
- Capacitor C will then discharge through resistor R and capacitor C, will discharge through R, and transistor 0,, and resistors R R3 and R5.
- explosive charge detonating means selectively coupled to said power supply for firing said explosive charge, comprising electrical charge storage means and an anti-disturbance firing mechanism;
- fire controlling means remote from said explosive detonating means and said explosive charge for controlling the firing of said explosive charge comprising an operator actuated firing switch, arming and disarming means coupled to one side of said power supply for arming and disarming said explosive detonating means; a transistor, and a lamp that will light when said arming andl disarming means is in the arming mode and be extingished when said electrical charge storage means is sufficiently charged to detonate said explosive charge, wherein one terminal of said lamp is coupled to the first terminal of said transistor, said operator actuated firing switch is coupled between the second terminal of said transistor and the other terminal of said power for said ated firing switch is closed, when said coupling means is opencircuited, and when said coupling means is short-circuited.
- said detonating means further comprises a silicon controlled rectifier connected in parallel to the combination of of said explosive charge and the parallel combination of a resistor and said storage means.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
Abstract
A firing device having an anti-disturbance firing mechanism; a lead short, shunt, or open circuit firing mechanism; and an operator actuated switch firing mechanism, wherein each of said firing mechanisms is capable of causing detonation of a squib. The power supply and the operator actuated arm/disarm and firing switch and ready lamp are included in a control unit remote from the squib housing.
Description
United States Patent [1 1 Swallow et a1.
3, 750,586 Aug, 7, 1973 FIRING DEVICE Inventors: Robert E. Swnilow; Darrell A.
Bymoen; Gnyllon L. Went, all of China Lake, Calif.
The United States 011' Americn as represented by the Secretory oi the Navy, Washington, DC.
Filed: June 25, 1071 Appl. N0.: 156,679
Assignee:
US. Cl 102/16, 102/192, 102/702 R Int. Cl. F421) 23/26, F42b 21/38 Field of Search 102/8, 16, 18, 19.2,
References Cited UNITED STATES PATENTS West et a1. H 102/702 R West 102/192 Primary Examiner-Benjamin A. Borchelt Assistant Examiner.lames M. Hanley Atmrney- R. S. Sciascia, Roy Miller ct a1.
[5 7] ABSTRACT A firing device having an anti-disturbance firing mechanism; a lead short, shunt, or open circuit firing mechanism; and an operator actuated switch firing mechanism, wherein each of said firing mechanisms is capable of causing detonation of a squib. The power supply and the operator actuated arm/disarm and firing switch and ready lamp are included in a control unit remote from the squib housing.
3 Claims, 2 Drawing Figures R5; Q2 R? as I i I I I I I I B I I I I I I SQLJIB DETONATING CIRCUIT PATENIED AUG 7 I975 same or 2 u oun MW MwN T m mm nHmo WE N0 M W0. m m I I I I I I I I I I I II IIIL FIRING DEVICE BACKGROUND OF THE INVENTION In certain mines and land mines in which the firing mechanism is positioned at a remote location from the squib and mine, the enemy has conceived plans and prescribed procedures which compromise the explosive device. Therefore, until now a need has existed for such a device which is uncompromiseable, but disarmable. The present invention fulfills that need.
SUMMARY OF THE INVENTION The present invention is a remotely actuable, uncompromiseable, but disarmable, firing device. It consists of a remotely located, control unit coupled to a squib and squib detonating circuit located at the explosive device. The control unit includes an arm/disarm switch, an operator actuated firing switch, and a ready lamp. The squib detonating circuit includes a firing capacitor, an anti-disturbance firing mechanism, and a silicon controlled rectifier (SCR) with associated passive components.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a block diagram of the present invention; and
FIG. 2 is a schematic diagram of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention is shown in block diagram form in FIG. I It includes a power supply M, a remote control unit 10, a squib detonating circuit 12, and a squib 28. The remote control unit 10 comprises an arm/disarm switch 16 coupled to the power supply 14, a ready lamp circuit 18 coupled to switch 16, and an operator actuated firing switch 20 coupled to circuit 18. Remote control unit 10 is coupled through long lead coupler 22 to squib detonating circuit 12. The squib detonating circuit comprises anti-disturbance firing mechanism 24 and firing circuit 26. Squib 28 is coupled to the output of firing circuit 26.
The schematic diagram of the preferred embodiment of the present invention is shown in FIG. 2, wherein like numerals are used to indicate the component composition of the blocks of FIG. 1. Remote control unit 1 taken alone, includes lamp L, connected in series with resistor R, to the collector, and in parallel with the operator actuated firing switch 20 connected between the lamp and base, of NPN transistor 0,; and the combination coupled in parallel with capacitor C, to arm/- disarm switch 16. Of course, transistor Q, can be replaced with a PNP transistor if the circuit is appropriately modified, as is well known in the art.
While applicant does not wish to be limited to any particular set of circuit constants, the following constant has proven to be useful in the particular circuit shown.
Symbol Components Type or Value 14 Battery 45 volt NEDA 2l3 C, Capacitor microfarads, 50 volt R, Resistor l Kilohm Q, Transistor 2N3904 R, Resistor l Kilohm R, Resistor l0 Kilohm R Resistor 220 Kilohm D, Diode lN9l6 C, Capacitor 2200 Picofarad R Resistor l Kilohm Q Silicon controlled 2N885 rectifier R Resistor 470 Kilohm C Capacitor 5O microfarad, 50 volt For the above indicated components the operation is as follows: When arm/disarm switch 16 is closed current from power supply 14 charges capacitors C, and C Lamp L, will light if there is a completed circuit, and then, will turn off when the circuit is ready to fire, i.e., when G, is sufficiently charged. Squib 28 will then detonate if any of the following occurs: (a) squib detonating circuit 12 is disturbed causing anti-disturbance firing mechanism 24 to close, (bl the long leads connected to coupler 22 are shorted, shunted, or open circuited, or (c) operator actuated firing switch 20 is closed. All of the firing actions caused the voltage difference between points A and B to approach zero, which causes silicon controlled rectifier O to turn on and conduct. Thereby, capacitor C is discharged through silicon controlled rectifier Q, and squib 28. As a result, squib 28 is fired.
If the operator wishes to disarm the device he merely opens arm/disarm switch 16. Capacitor C, will then discharge through resistor R and capacitor C, will discharge through R, and transistor 0,, and resistors R R3 and R5.
Many modifications and uses of the present invention, including constructing it of miniaturized components and installing it in the cap-well of the mine to be detonated, is contemplated by the inventor and is considered so disclosed.
What is claimed is:
l. A firing device for detonating a squib or other explosive device wherein the fire control unit is remote from said explosive device, comprising:
a power supply for providing electric device;
an explosive charge;
explosive charge detonating means selectively coupled to said power supply for firing said explosive charge, comprising electrical charge storage means and an anti-disturbance firing mechanism;
fire controlling means remote from said explosive detonating means and said explosive charge for controlling the firing of said explosive charge, comprising an operator actuated firing switch, arming and disarming means coupled to one side of said power supply for arming and disarming said explosive detonating means; a transistor, and a lamp that will light when said arming andl disarming means is in the arming mode and be extingished when said electrical charge storage means is sufficiently charged to detonate said explosive charge, wherein one terminal of said lamp is coupled to the first terminal of said transistor, said operator actuated firing switch is coupled between the second terminal of said transistor and the other terminal of said power for said ated firing switch is closed, when said coupling means is opencircuited, and when said coupling means is short-circuited.
3. The device of claim 2 wherein said detonating means further comprises a silicon controlled rectifier connected in parallel to the combination of of said explosive charge and the parallel combination of a resistor and said storage means.
Claims (3)
1. A firing device for detonating a squib or other explosive device wherein the fire control unit is remote from said explosive device, comprising: a power supply for providing electric power for said device; an explosive charge; explosive charge detonating means selectively coupled to said power supply for firing said explosive charge, comprising electrical charge storage means and an anti-disturbance firing mechanism; fire controlling means remote from said explosive detonating means and said explosive charge for controlling the firing of said explosive charge, comprising an operator actuated firing switch, arming and disarming means coupled to one side of said power supply for arming and disarming said explosive detonating means; a transistor, and a lamp that will light when said arming and disarming means is in the arming mode and be extingished when said electrical charge storage means is sufficiently charged to detonate said explosive charge, wherein one terminal of said lamp is coupled to the first terminal of said transistor, said operator actuated firing switch is coupled between the second terminal of said transistor and the other terminal of said lamp, the junction of said lamp and said operator actuated firing switch is coupled to said arming and disarming means, and the third terminal of said transistor is coupled to the other side of said power supply.
2. The device of claim 1 wherein said fire controlling means is coupled through a coupling means to said detonating means such that aFter said detonating means is enabled said explosive charge will detonate when said detonating means is moved, when said operator actuated firing switch is closed, when said coupling means is opencircuited, and when said coupling means is short-circuited.
3. The device of claim 2 wherein said detonating means further comprises a silicon controlled rectifier connected in parallel to the combination of of said explosive charge and the parallel combination of a resistor and said storage means.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15667971A | 1971-06-25 | 1971-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3750586A true US3750586A (en) | 1973-08-07 |
Family
ID=22560581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00156679A Expired - Lifetime US3750586A (en) | 1971-06-25 | 1971-06-25 | Firing device |
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US (1) | US3750586A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3892182A (en) * | 1973-12-10 | 1975-07-01 | Cbf Systems Inc | Squib control circuit |
US4047482A (en) * | 1974-10-11 | 1977-09-13 | Etat Francais | Electronic igniter circuit for detonating an electric primer |
US4088075A (en) * | 1976-07-06 | 1978-05-09 | The United States Of America As Represented By The Secretary Of The Army | Firing circuit |
DE3412798A1 (en) * | 1984-04-05 | 1985-10-17 | kabelmetal electro GmbH, 3000 Hannover | Circuit arrangement and method for triggering an explosive charge |
EP0274231A1 (en) * | 1986-12-10 | 1988-07-13 | Nippon Oil And Fats Company, Limited | Method of electrically blasting a plurality of detonators and electric blasting apparatus for use in said method |
US4884506A (en) * | 1986-11-06 | 1989-12-05 | Electronic Warfare Associates, Inc. | Remote detonation of explosive charges |
US4960183A (en) * | 1985-08-16 | 1990-10-02 | Exxon Production Research Company | Seismic source firing control system |
US5159149A (en) * | 1988-07-26 | 1992-10-27 | Plessey South Africa Limited | Electronic device |
DE19845751A1 (en) * | 1998-10-05 | 2000-04-13 | Honeywell Ag | Programmable ballistic missile firing point control has voltage generator, detonator and program interface, microprocessor and delay circuitry built into missile |
US6138571A (en) * | 1998-12-21 | 2000-10-31 | The United States Of America As Represented By The Secretary Of The Navy | Fireset for a low energy exploding foil initiator: MOSFET driven MOSFET switch |
US20020089017A1 (en) * | 2001-01-05 | 2002-07-11 | Lai Chun Hsiang | Electostatic discharge protection circuit coupled on I/O pad |
US6634298B1 (en) * | 1998-12-21 | 2003-10-21 | The United States Of America As Represented By The Secretary Of The Navy | Fireset for a low energy exploding foil initiator: SCR driven MOSFET switch |
WO2012034137A1 (en) * | 2010-09-09 | 2012-03-15 | Detnet South Africa (Pty) Limited | Blasting arrangement |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3598056A (en) * | 1968-12-19 | 1971-08-10 | Us Navy | Fuze |
US3665860A (en) * | 1970-12-24 | 1972-05-30 | Us Navy | Detector |
-
1971
- 1971-06-25 US US00156679A patent/US3750586A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3598056A (en) * | 1968-12-19 | 1971-08-10 | Us Navy | Fuze |
US3665860A (en) * | 1970-12-24 | 1972-05-30 | Us Navy | Detector |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3892182A (en) * | 1973-12-10 | 1975-07-01 | Cbf Systems Inc | Squib control circuit |
US4047482A (en) * | 1974-10-11 | 1977-09-13 | Etat Francais | Electronic igniter circuit for detonating an electric primer |
US4088075A (en) * | 1976-07-06 | 1978-05-09 | The United States Of America As Represented By The Secretary Of The Army | Firing circuit |
DE3412798A1 (en) * | 1984-04-05 | 1985-10-17 | kabelmetal electro GmbH, 3000 Hannover | Circuit arrangement and method for triggering an explosive charge |
US4960183A (en) * | 1985-08-16 | 1990-10-02 | Exxon Production Research Company | Seismic source firing control system |
US4884506A (en) * | 1986-11-06 | 1989-12-05 | Electronic Warfare Associates, Inc. | Remote detonation of explosive charges |
EP0274231A1 (en) * | 1986-12-10 | 1988-07-13 | Nippon Oil And Fats Company, Limited | Method of electrically blasting a plurality of detonators and electric blasting apparatus for use in said method |
US4848232A (en) * | 1986-12-10 | 1989-07-18 | Nippon Oil And Fats Company, Limited | Method of electrically blasting a plurality of detonators and electric blasting apparatus for use in said method |
US5159149A (en) * | 1988-07-26 | 1992-10-27 | Plessey South Africa Limited | Electronic device |
DE19845751A1 (en) * | 1998-10-05 | 2000-04-13 | Honeywell Ag | Programmable ballistic missile firing point control has voltage generator, detonator and program interface, microprocessor and delay circuitry built into missile |
DE19845751B4 (en) * | 1998-10-05 | 2004-02-19 | Honeywell Ag | Projectile impact fuze |
US6138571A (en) * | 1998-12-21 | 2000-10-31 | The United States Of America As Represented By The Secretary Of The Navy | Fireset for a low energy exploding foil initiator: MOSFET driven MOSFET switch |
US6634298B1 (en) * | 1998-12-21 | 2003-10-21 | The United States Of America As Represented By The Secretary Of The Navy | Fireset for a low energy exploding foil initiator: SCR driven MOSFET switch |
US20020089017A1 (en) * | 2001-01-05 | 2002-07-11 | Lai Chun Hsiang | Electostatic discharge protection circuit coupled on I/O pad |
US8164112B2 (en) * | 2001-01-05 | 2012-04-24 | Macronix International Co., Ltd. | Electostatic discharge protection circuit coupled on I/O pad |
WO2012034137A1 (en) * | 2010-09-09 | 2012-03-15 | Detnet South Africa (Pty) Limited | Blasting arrangement |
US8939082B2 (en) | 2010-09-09 | 2015-01-27 | Detnet South Africa (Pty) Ltd | Blasting arrangement |
AU2011298992B2 (en) * | 2010-09-09 | 2016-01-14 | Detnet South Africa (Pty) Limited | Blasting arrangement |
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