Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating
Patent
1976-07-19
1978-01-03
Tung, T.
Chemistry: electrical and wave energy
Processes and products
Vacuum arc discharge coating
204195S, 204 1T, G01N 2744
Patent
active
040665283
ABSTRACT:
Apparatus for coulometry comprises (a) an instrumentation amplifier acting as a differential to single-ended potential convertor having high input impedence, (b) means for feeding (a) with the potential between the sensor and reference electrodes of a coulometric cell and (c) and differential potential input amplifier fed by (a) and by means for setting the output of (c) to zero, the phase shift of the apparatus being less than 90.degree..
REFERENCES:
patent: 2886496 (1959-05-01), Eckfeldt
patent: 3341430 (1967-09-01), Wickerham et al.
patent: 3441490 (1969-04-01), Johansson
patent: 3563875 (1971-02-01), Coulson
patent: 3647668 (1972-03-01), Lindblad et al.
Imperial Chemical Industries Limited
Tung T.
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