Ammunition and explosives – Igniting devices and systems – Ignition or detonation circuit
Patent
1957-02-01
1980-05-20
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
Ignition or detonation circuit
F42C 1304
Patent
active
042033667
ABSTRACT:
1. A microwave proximity fuze for a missile, comprising, a radio transmitting-receiving system including a waveguide having at one end a klystron with a repeller electrode and an antenna at the other end thereof, means including a square wave modulator for sending a predetermined sequence of voltage pulses to the repeller of said klystron to produce corresponding but well-defined frequency changes in the output signals from said klystron, said output signals being transmitted through said waveguide and radiated by said antenna into free space and intercepted and reflected back to said antenna by a target, a pair of directional couplers, one of said couplers being responsive only to transmitted signals and the other said coupler being responsive to received signals reflected from said target, means including a balanced mixer having its input channels connected to receive said signals from said couplers, means including crystal detectors mounted in the output channels of said balanced mixer, means including an intermediate frequency amplifier for receiving the output signals from said crystal detectors, means including a diode for receiving a unidirectional voltage signal from said intermediate frequency amplifier, an auxiliary detector, a third directional coupler associated with said waveguide for transmitting outgoing signals to said auxiliary detector, said auxiliary detector producing a rectified transmitted signal, means including a gate electrically associated with said auxiliary detector and said diode as well as said square wave modulator to give a negative bias on the cathode of said diode, said bias on said cathode of said diode being determined jointly by the voltage derived from the rectified transmitted signal from said auxiliary detector and the voltage from said square wave modulated, and a firing circuit for said fuze including a squib and a thyratron tube having an anode, a cathode and a control grid for also receiving said negative bias, said thyratron causing detonation of said squib whenever the negative bias of said control grid becomes reduced sufficiently to permit a discharge to occur between its anode and cathode.
REFERENCES:
patent: 2536327 (1951-01-01), Tolson
patent: 2557864 (1951-06-01), Doremus
patent: 2618744 (1952-11-01), Braden
patent: 2688131 (1954-08-01), Kiebert
patent: 2700156 (1955-01-01), Sunstein
patent: 2738502 (1956-03-01), Armstrong
"Proximity Fuzes for Artillery", Harner Selvidge, Electronics Magazine, pp. 04-109, Feb. 1946.
Branning A. L.
Jordan Charles T.
Sciascia R. S.
The United States of America as represented by the Secretary of
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