The Magnavox Company

Other

Joseph P Gleason

Harry G Posthumus

1. In combination, a first source for producing a first signal representative of intelligence to be transmitted from one point to another, second source for producing a binary carrier signal having a first voltage level and a second voltage level, means responsive to the first signal and to the binary carrier signal for frequency-modulating the carrier signal in accordance with the first signal to produce a modulated intelligence signal having first and second voltage levels and exhibiting transitions between the same, a third source for producing a binary encoding signl having first and second voltage levels and exhibiting transitions between such levels in conformance with an apparently random predetermined sequence of variations in the encoding signal between the first and second voltage levels at different multiples of a particular time interval, and circuit means coupled to said modulating means and to said third source for inverting the voltage level of the encoding signal from the first voltage level to the second voltage level and from the second voltage level to the first voltage level and upon the simultaneous occurrence of the second voltage level in the intelligence signal to produce an encoded intelligence signal.

Communication system

The position transducer uses an elongated resistance which can be switched to a fixed voltage source to provide a voltage gradient along the resistance. A metal strip with a single aperture is arranged to be moved along parallel to the resistance and another elongated metal conductor is positioned on the other side of the metal strip so that the metal strip with the aperture is sandwiched between the resistance and the conductor. Physical movement of the strip moves the aperture and thus will change the voltage value electrostatically coupled from the voltage on the resistance to the conductor. An analog voltage constituting a function of a digital count value is repetitively switched onto the entire resistance and compared with this voltage value at a given high frequency. If the analog voltage is less than the voltage value on the resistance opposite the aperture, an up count signal is generated to increase the digital count and thus increase the analog voltage. If the analog voltage is greater than the voltage value, a down count signal is generated to decrease the digital count value and thus decrease the analog value. Comparisons are made on each cycle of said given high frequency. Either or both the digital count value and analog signal can be used as an accurate indication of the physical position of the aperture.

Position transducing method and means

1. A radar system for determining the range to and velocity of a target comprising the combination of:

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Woodland Hills, CA, United States of America

Joseph P Gleason