Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1977-05-16
1980-02-12
Griffin, Robert L.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
325321, 325142, 328111, 307234, 329106, H03K 520, H04B 100
Patent
active
041885813
ABSTRACT:
A signalling system designed to transmit and reliably detect alpha-numeric information with a single pulse indicating each different numeral from 0 to 9 and letters of the alphabet or code symbol. Each alpha-numeric symbol is coded in a single pulse of discreet difference lengths at the transmitting station. At the receiving station the train of pulses which is received is introduced into a transmission line having multiple taps with each tap related in position to detect a particular alpha-numeric encoded pulse. The transmission line is terminated with an impedance mismatch whereby each pulse is reflected back down the line. Detection occurs when the leading edge and the trailing edge of a pulse are coincident at the tap. Pulses having a length differing by only 40 nanoseconds (.+-.20 nanoseconds) are easily detected. The range of pulse lengths for a 40 numeral code recommended is 110 nanoseconds to 1990 nanoseconds with an average tap separation of 24.87 nanoseconds. The pulse detector is basically a tapped helix. An embodiment of an anti-collision system is disclosed.
REFERENCES:
patent: 2905887 (1959-09-01), Taddeo
patent: 3046483 (1962-07-01), Breskind
patent: 3281806 (1966-10-01), Lawrence
patent: 3460068 (1969-08-01), Lechleider
patent: 4061975 (1977-12-01), Sugai
patent: 4061976 (1977-12-01), Sugai
Griffin Robert L.
Masinick Michael A.
Wagner John E.
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