161 |
Electronic delay detonator |
US601699 |
1984-04-18 |
US4586437A |
1986-05-06 |
Kosuke Miki; Shiro Hiruta |
An electronic delay detonator actuated after the lapse of a predetermined delay time from the application of an input power source, comprises a capacitor for storing the electrical energy supplied from the input power source, a diode bridge for preventing the stored electrical energy from being released reversely toward the input power source, a CR oscillator, a counter for generating a signal upon having counted a pulse signal produced from the CR oscillator by a predetermined number, and a thyristor driven by the signal for supplying the electrical energy stored in the capacitor to an ignition device in the detonator, the delay time being accurately determined by counting the pulses generated from the CR oscillator. |
162 |
Digital time fuze method and apparatus |
US369749 |
1982-04-19 |
US4577561A |
1986-03-25 |
John W. Perry |
A digital time fuze for providing an output pulse following a precise, specified time interval, wherein control means extract time interval data from a set signal, the control means thereafter providing a portion of a clock signal to a counter such that the length of the portion of the clock signal provided is determined by the time interval data. Counter means count the number of pulses in the clock signal portion to accumulate a timer count. In response to a start signal, the counter means counts down the timer count according to a count down clock which is provided by the control means and which is proportional to and derived from the clock signal. When the count reaches zero the output pulse is provided. |
163 |
Digital timer fuze |
US238709 |
1972-03-24 |
US4424745A |
1984-01-10 |
William R. Magorian; Kenneth R. Wetzel |
A digital timer fuze (DTF) in subcombination with a digital timer fuze sym. The central element in the fuze system is the aircraft fire-control computer including a fuze setter, which receives input signals from various sensors as required for rocket trajectory computations and, in addition, pilot commands. When the pilot arms the system and selects a firing mode, power is supplied to each fuze in the load. When the firing button (pickle switch) is depressed, timing commands are injected into each fuze in proper sequence and the rocket motors are initiated via circuits and initiators incorporated in the launcher pods. As each rocket moves forward under motor thrust, the lead to its fuze is separated. Physical interruption of this circuit initiates the "run" phase of the digital timer fuze.The digital timer fuze is electrically connected to the fuze setter. A signal from the fuze setter charges a power supply capacitor and causes a counter to count clock pulses for a given period of time and store the count. When the umbilical line connecting the fuze to the fuze setter is severed, the main counter counts down at a given rate. When all of the stored counts have left the counter, the counter gates an SCR which allows the power supply capacitor to actuate the detonator. |
164 |
Antipersonnel mine |
US673019 |
1976-04-02 |
US4374492A |
1983-02-22 |
Ernest Goldberg; Gray C. Trembly; William A. Zarr |
An antipersonnel mine is shown, a plurality of such mines being adapted to be loaded into a round of ammunition for dispersal and subsequent detonation at random instants. The timing for detonation of each mine is determined by the discharge of a capacitor, starting when dispersal occurs. The condition of the explosive lead of each mine before loading is indicated by a position indicator in the safing and arming mechanism. |
165 |
Specialized detonator firing circuit |
US396782 |
1964-09-15 |
US4095527A |
1978-06-20 |
Morrison Bert Moore, III |
1. A condition responsive electronic firing circuit responsive to a predemined change in supply voltage comprising:A first switch means normally biased for conduction,A second switch means including a controlled rectifier normally biased for non-conduction, wherein the gate electrode is responsively connected to said first switch means whereby a change in the conductive state of said first switch effects a corresponding change in the conductive state of said second switch;A detonator connected between one of the output electrodes of the controlled rectifier and a source of power whereby a detonating current passes therethrough when the rectifier becomes conductive;A bypass capacitor connected between the gate and the other rectifier output electrode for preventing inadverent actuation of the rectifier by spurious signals;A zener diode interconnecting said first switch means and a source of power;A storage means connected across the output electrodes of said controlled rectifier to provide a discharge pulse to said detonator upon the initiation of conduction in said controlled rectifier. |
166 |
Circuit arrangement for supplying clock pulses to a projectile fuze |
US638060 |
1975-12-05 |
US4041870A |
1977-08-16 |
Godwin Ettel |
A circuit for supplying clock or timing pulses to a projectile fuze, comprising an astable multivibrator possessing field-effect transistors and a supply capacitor for controlling and supplying the multivibrator. Between the multivibrator and the supply capacitor there is connected in circuit a resistor and parallel to said resistor there is connected a trimmer capacitor for stabilizing the frequency of the clock pulses. |
167 |
Presettable counter |
US420358 |
1973-11-29 |
US3955069A |
1976-05-04 |
Richard T. Ziemba |
An electronic, digital, time fuze is disclosed having a counter which may be initially preset mechanically before flight, and which may subsequently be changed during a predetermined interval during flight, by a radar command link. Several mechanical presetting mechanisms for the counter are also disclosed. |
168 |
Contact delay and self-destruct circuit |
US4858970 |
1970-05-14 |
US3862602A |
1975-01-28 |
MANNING LARRY G |
A circuit for providing a predetermined time delay after missile impact before detonation, and a self-destruct system controlled by the missile''s operation. The circuit utilizes a quad inverter fed by the self-destruct system and the contact delay system, in parallel, driving a firing system. The contact delay system is basically a one-shot multivibrator, utilizing pulses from piezoelectric crystals as inputs, and having an RC timing circuit to trigger the firing system. The self-destruct system utilizes a reduced voltage resulting from an extinquished gas generator to trigger the firing system. The firing system has an SCR gate triggered by the quad inverter output.
|
169 |
Deceleration measuring apparatus |
US32819673 |
1973-01-31 |
US3851522A |
1974-12-03 |
PETERSON C |
Deceleration measuring apparatus is disclosed as comprising first and second deceleration measuring devices for providing outputs in response to measured first and second levels of deceleration, respectively. In an illustrative embodiment of this invention, the deceleration measuring devices may take the form of cantilever beams, each having a first end fixably secured and a second end suspended to be deflected under the influence of deceleration forces. Further, each deceleration measuring device includes a closing contact against which the second end of the cantilever beam closes when a predetermined deceleration level is sensed. The first deceleration measuring device has a cantilever beam of a first, relatively long length and closes in response to a relatively low, first level of deceleration. The second deceleration device includes a cantilever beam of a second, relatively short length which closes in response to a relatively high, second level of deceleration. Significantly, the time difference between the closing and therefore the output of the first and second deceleration measuring devices is indicative of the slope or the change of the deceleration to which these devices are subjected. In one illustrative embodiment, the first and second deceleration measuring devices are mounted within a projectile and its deceleration is determined by measuring the time interval between the outputs of the first and second deceleration measuring devices. In turn, the indicated deceleration is used to provide a measure of the density of the material struck by the projectile and to control the time of detonation of the explosives carried by the projectile.
|
170 |
Self-destructing apparatus for impact-detonating explosive devices |
US31009272 |
1972-11-28 |
US3815505A |
1974-06-11 |
ROH P; STRUNK M |
A self-destructing apparatus for impact-detonating explosive devices having a piezoelectric fuze responsive to sonic waves for detonation of the device. The apparatus includes means responsive to at least one of firing or dropping of the impact-detonating explosive device for triggering a sonic wave generator after a predetermined time delay, the sonic wave produced by the generator being transmitted to the piezoelectric fuze for detonation of the explosive device, thereby ensuring destruction of the device.
|
171 |
Electronic distributor for the sequential supplying electric-current-receiving loads |
US31211372 |
1972-12-04 |
US3808459A |
1974-04-30 |
GUIMIER J; COUTIN P |
Each load C1, C2, C3 . . . to which the electronic distributor is associated is supplied by an individual thyristor the triping device of which, except in the case of the first thyristor, is controlled by an AND-circuit having two inputs of which one is connected to the cathode of the previous thyristor while the other is connected, in the case of the odd thyristors, to one of the outputs of a bistable trigger circuit B, and in the case of the even thyristors to the other output of this trigger circuit, which is itself controlled by a pulse generator GI.
|
172 |
Fuze |
US66347267 |
1967-08-21 |
US3805703A |
1974-04-23 |
CUMMINGS J |
An ordnance fuse is provided for distinguishing interposed material, such as a forest canopy, from a true target; providing a firing signal at the latter and refraining from firing at the former. An electronic integrating comparator compares the time interval of contact with a target or canopy with a selected time interval and provides a firing signal when the contact time exceeds a threshold that distinguishes a true target from intervening material.
|
173 |
Anti-swimmer charge |
US3722408D |
1970-02-20 |
US3722408A |
1973-03-27 |
FOX J; ROSLING T |
An anti-swimmer explosive charge device having a capacitor for energy storage and a water activated switch. The water activated switch consists of two terminals separated by a salt impregnated insulator. When the insulator becomes wet it conducts current from the energy source to a timing circuit.
|
174 |
Solid state timer |
US3657571D |
1970-05-21 |
US3657571A |
1972-04-18 |
MARTIN VINCENT W; STEINER BRUCE G |
Disclosed is a timer of all solid state components and primarily formed from integrated circuits. The timer comprises a very low frequency oscillator coupled through a divider to an output circuit. In one embodiment, the timer is used to self-destruct a land mine after about twelve hours. In another, it produces an output from a magnetic core ring counter after about a year. Complementary MOSFET''s are used for the circuit components to minimize power consumption in both embodiments.
|
175 |
Electrical pyrotechnic programming system |
US3570404D |
1968-06-21 |
US3570404A |
1971-03-16 |
POPE KENNETH E |
An electrical pyrotechnic programming system, including a pyrotechnic signal source for activating an electrical power source. The power source provides current to an electrical switching system, including individual switches responsive to velocity acceleration and barometric altitude. Closure of the switches after actuation of the electrical power source produces a pyrotechnic output signal by igniting bridge wires. The power source comprises parallel connected batteries, the first of which is a type known as a thermal battery, and the second of which is a more conventional nickel-cadmium battery.
|
176 |
Squib control circuit |
US3559582D |
1968-12-27 |
US3559582A |
1971-02-02 |
HRZEK BOHUSLAV A |
A number of branch circuits is provided each containing a low resistance squib element connected across a pair of voltage input points each of which branch circuits includes a self-resetting, solid state, threshold level responsive switch device which is in a normally high resistance condition and is triggered to a low resistance condition when a voltage applied thereacross exceeds a given threshold voltage value, which low resistance condition persists until the current flowing therethrough drops below a given holding current level. Each squib element will then heat and blow to trigger a given operation and open the branch circuit involved when the current persists therethrough for a given minimum duration. Means for providing a source of voltage pulses is connected across the input points which pulses preferably exceed the threshold voltage values of all of the threshold level responsive switch devices in the branch circuits. The voltage responsive characteristics of the switch devices vary somewhat so only one of the switch devices is triggered into its low resistance condition for each pulse to effect a flow of current for said duration to blow the associated squib element.
|
177 |
Voltage regulator for a capacitive reactive load |
US3505583D |
1966-10-05 |
US3505583A |
1970-04-07 |
BURKHARDT LAWRENCE E; JOHNSON CHARLES H; BRANAGAN EDWARD F |
|
178 |
Time delay fuze |
US3504632D |
1968-06-04 |
US3504632A |
1970-04-07 |
WEST GAYLON L; FORSTER ROBERT H; QUIST DONALD G; CLAPP ROBERT L |
|
179 |
Time fuze |
US3502024D |
1967-05-18 |
US3502024A |
1970-03-24 |
MOUNTJOY GARRARD |
|
180 |
Electronically time delayed cutter |
US65773267 |
1967-07-31 |
US3388879A |
1968-06-18 |
PISANO FRANK T; DANIELS JAMES H |
|