System with photocouplers for automatic checking of operating th

Details System with photocouplers for automatic checking of operating th System with photocouplers for automatic checking of operating th

1975-12-31

1977-05-24

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 96, 324133, 340248E, G01R 3102

Patent

active

040258459

ABSTRACT:
Device for the automatic checking of operating thyristors making it possible to check clearly the good condition of thyristors. It comprises photocouplers connected with resistors, arranged in parallel with a group of thyristors. The outputs of the photocouplers are grouped two by two to form a differential information. Applications: Railway or underground railway equipment.

REFERENCES:
patent: 3163801 (1964-12-01), Vansteenkiste
patent: 3188526 (1965-06-01), Engel
patent: 3328692 (1967-06-01), Lyon
patent: 3623054 (1971-11-01), Wuthrich
patent: 3795863 (1974-03-01), Umeda et al.
Frankeny, R. F., Drift Indicator IBM Tech. Disc. Bulletin, vol. 14, No. 3, Aug. 1971, p. 724.
Lyons et al., Light-Emitting Diode Circuit IBM Tech. Discl. Bulletin, vol. 14, No. 12, May, 1972, p. 3580.

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