Abstract 1. A radio-proximity ordnance fuze comprising: a generator of radio frequency energy; modulator means for modulating the frequency of said generator with a modulation frequency fr; antenna means for radiating energy from said generator and for receiving a portion of the energy thus radiated upon its return from a reflective target; mixer means for combining frequencymodulated radio-frequency energy thus received with a local frequency-modulated radio-frequency signal taken directly from said generator to obtain a mixer output signal having a component of frequency nfr, n being an integer; selective amplifier means peaked at the frequency nfr connected to the output of said mixer means for obtaining a return-derived-signal of frequency nfr; a frequency multiplier connected to said modulator means for obtaining a reference signal of frequency nfr having a constant phase; adjustable phase shift means connected to the output of said frequency multiplier for adjusting the phase of said reference signal to a predetermined value; frequency heterodyning means connected to the outputs of said selective amplifier means and said adjustable phase shift means for obtaining at a first heterodyning means output a reference signal of frequency nfr fo, and at a second heterodyning output a return-derived-signal also of frequency nfr - fo; frequency doubler means connected to said second heterodyning means output for obtaining a returnderived-signal of frequency 2 (nfr- fo); first squarer means connected to said first heterodyning means output for producing a square wave reference signal of frequency nfr - fo; second squarer means connected to the output of said frequency doubler for producing a square wave return-derived-signal of frequency 2(nfr - fo); first pulse former means connected to the output of said first squarer means for producing a reference signal positive output pulse at the beginning of each positive-going step of said square wave reference signal; second pulse former means connected to the output of said second squarer means for producing a return-derived-signal positive output pulse at the beginning of each positive-going step of said square wave returnderived-signal; a bistable flip-flop circuit having an ''''on'''' state and an ''''off'''' state, said flip-flop circuit being adapted to be switched to the ''''on'''' state by said return-derived signal pulses and to be switched to the ''''off'''' state by said reference signal pulses, the output of said flip-flop circuit thereby being dependent upon the phase difference between said reference signal of frequency nfr - fo and of constant and predetermined phase and said return-derived-signal of frequency nfr - fo whose phase is dependent upon target distance; and detonator-firing means responsive to the attainment of the output of said flip-flop of at least a critical value.
Inventors
👤 Harold Goldberg
👤 Milton Sanders
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-08 17:26
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/04; F42C13/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
421 words
A radio-proximity ordnance fuze comprising: a generator of radio frequency energy; modulator means for modulating the frequency of said generator with a modulation frequency fr; antenna means for radiating energy from said generator and for receiving a portion of the energy thus radiated upon its return from a reflective target; mixer means for combining frequencymodulated radio-frequency energy thus received with a local frequency-modulated radio-frequency signal taken directly from said generator to obtain a mixer output signal having a component of frequency nfr, n being an integer; selective amplifier means peaked at the frequency nfr connected to the output of said mixer means for obtaining a return-derived-signal of frequency nfr; a frequency multiplier connected to said modulator means for obtaining a reference signal of frequency nfr having a constant phase; adjustable phase shift means connected to the output of said frequency multiplier for adjusting the phase of said reference signal to a predetermined value; frequency heterodyning means connected to the outputs of said selective amplifier means and said adjustable phase shift means for obtaining at a first heterodyning means output a reference signal of frequency nfr-fo, and at a second heterodyning output a return-derived-signal also of frequency nfr-fo; frequency doubler means connected to said second heterodyning means output for obtaining a return-derivedsignal of frequency 2 (nfr-fo); first squarer means connected to said first heterodyning means output for producing a square wave reference signal of frequency nfr-fo; second squarer means connected to the output of said frequency doubler for producing a square wave return-derived-signal of frequency 2(nfr-fo); first pulse former means connected to the output of said first squarer means for producing a reference signal positive output pulse at the beginning of each positive-going step of said square wave reference signal; second pulse former means connected to the output of said second squarer means for producing a returnderived-signal positive output pulse at the beginning of each positive-going step of said square wave return-derived-signal; a bistable flip-flop circuit having an ''''on'''' state and an ''''off'''' state, said flip-flop circuit being adapted to be switched to the ''''on'''' state by said return-derived signal pulses and to be switched to the ''''off'''' state by said reference signal pulses, the output of said flip-flop circuit thereby being dependent upon the phase difference between said reference signal of frequency nfr-fo and of constant and predetermined phase and said returnderived-signal of frequency nfr-fo whose phase is dependent upon target distance; and detonator-firing means responsive to the attainment of the output of said flip-flop of at least a critical value.
Claim 2
Dependent Claim
421 words
A radio-proximity ordnance fuze comprising: a generator of radio frequency energy; modulator means for modulating the frequency of said generator with a modulation frequency fr; antenna means for radiating energy from said generator and for receiving a portion of the energy thus radiated upon its return from a reflective target; mixer means for combining frequencymodulated radio-frequency energy thus received with a local frequency-modulated radio-frequency signal taken directly from said generator to obtain a mixer output signal having a component of frequency nfr, n being an integer; selective amplifier means peaked at the frequency nfr connected to the output of said mixer means for obtaining a return-derived-signal of frequency nfr; a frequency multiplier connected to said modulator means for obtaining a reference signal of frequency nfr having a constant phase; adjustable phase shift means connected to the output of said frequency multiplier for adjusting the phase of said reference signal to a predetermined value; frequency heterodyning means connected to the outputs of said selective amplifier means and said adjustable phase shift means for obtaining at a first heterodyning means output a reference signal of frequency nfr-fo, and at a second heterodyning output a return-derived-signal also of frequency nfr-fo; frequency doubler means connected to said second heterodyning means output for obtaining a return-derivedsignal of frequency 2 (nfr-fo); first squarer means connected to said first heterodyning means output for producing a square wave reference signal of frequency nfr-fo; second squarer means connected to the output of said frequency doubler for producing a square wave return-derived-signal of frequency 2(nfr-fo); first pulse former means connected to the output of said first squarer means for producing a reference signal positive output pulse at the beginning of each positive-going step of said square wave reference signal; second pulse former means connected to the output of said second squarer means for producing a returnderived-signal positive output pulse at the beginning of each positive-going step of said square wave return-derived-signal; a bistable flip-flop circuit having an ''''on'''' state and an ''''off'''' state, said flip-flop circuit being adapted to be switched to the ''''on'''' state by said return-derived signal pulses and to be switched to the ''''off'''' state by said reference signal pulses, the output of said flip-flop circuit thereby being dependent upon the phase difference between said reference signal of frequency nfr-fo and of constant and predetermined phase and said returnderived-signal of frequency nfr-fo whose phase is dependent upon target distance; and detonator-firing means responsive to the attainment of the output of said flip-flop of at least a critical value.