Transponder system including an oscillator/ripple counter contro

Details Transponder system including an oscillator/ripple counter contro Transponder system including an oscillator/ripple counter contro

1977-11-25

1979-07-03

Yusko, Donald J.

Communications: electrical

Digital comparator systems

340203, 340518, 340616, H04Q 900, G08B 2100

Patent

active

041602390

ABSTRACT:
A "red-alert" end condition digital signal is generated by a transponder system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including an oscillator/ripple counter controlling a fixed Gray code logic encoding network in circuit with a programmed 7-segment decoder/driver. The aforementioned system both is initiated by and is in power dependent relationship with a MARK-SPACE interrogation signal and has special utility in digitally monitoring product "overflow" conditions in source/product storage tank networks associated with an oil refinery and/or chemical complex.

REFERENCES:
patent: 3462736 (1969-08-01), Hollands
patent: 3742473 (1973-06-01), Hadden
patent: 4030095 (1977-06-01), Dalmal

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