Illuminating device for a microscope

Details Illuminating device for a microscope Illuminating device for a microscope

1975-01-21

1976-09-14

Rolinec, R. V.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Discharge device and/or rectifier in the primary circuit of...

315DIG4, 315DIG5, 315 71, 315276, 315283, H03F 3700

Patent

active

039809218

ABSTRACT:
An illuminating device for a microscope provided with a lighting control circuit controlled by changing the firing angle for which an impedance means is inserted between the output side of said lighting control circuit and primary side of the transformer in order to obtain a gentle rising curve for the current at the time of firing, thus to reduce the noise.

REFERENCES:
patent: 3283235 (1966-11-01), Auld et al.
patent: 3450941 (1969-06-01), Butts
patent: 3731182 (1973-05-01), Hirono et al.
patent: R26119 (1966-12-01), Slater
J. H. Galloway -- "Using the Triac for Control of AC Power" -- General Electric Application note 200.35, pp. 10, 11, 19, Mar. 1966.

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