Recorders – Electric recording – Electrochemical
Patent
1975-09-12
1977-06-14
Lucas, Jay P.
Recorders
Electric recording
Electrochemical
346139C, G03G 15044, G01D 1506
Patent
active
040301079
ABSTRACT:
A pair of high voltage switching circuits associated with first and second sources of voltage supply are connected with a pin-shaped record electrode through a resistor and an electrostatic induction plate, respectively. The electrostatic induction plate is disposed very closely adjacent the record electrode or its associated lead wires in a manner to establish an electrostatic capacitive coupling therebetween. A resistor, capacitor combination provides an integration circuit for current flow from the first source of voltage supply to the record electrode and also provides a differentiation circuit for current flow from the second voltage supply source to the record electrode. Voltages from the first and second sources are added together in an incremental fashion via the resistor-capacitor combination. The sum of the voltages which exceeds the threshold value of the voltage, i.e. the ignition voltage, is applied to the record electrode to produce a spontaneous gas discharge.
REFERENCES:
patent: 2955894 (1960-10-01), Epstein
patent: 3469028 (1969-09-01), Yamamoto
patent: 3470563 (1969-09-01), Starr
patent: 3483566 (1969-12-01), Rothgordt
patent: 3564556 (1971-02-01), Tsukatani
patent: 3611419 (1971-10-01), Blumenthal
patent: 3718936 (1973-02-01), Rice, Jr.
Lucas Jay P.
Sharp Kabushiki Kaisha
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