Indicator circuit for electronic flash apparatus

Details Indicator circuit for electronic flash apparatus Indicator circuit for electronic flash apparatus

1976-03-30

1978-07-11

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

With signal, indicator, or alarm

Electrically operated switch controlling the signal circuit

315134, 315135, 315241P, 340659, G08B 538, H05B 4126

Patent

active

041004590

ABSTRACT:
An electronic flash apparatus is provided with a display element positioned in the view-finder of a photographic camera so that the operator is immediately aware if the flash tube has been fired in response to the closure of the synchronous switch. The light emitting operation of this display element is controlled by use of a signal generator arranged to be responsive to the occurrence of discharge through the flash tube of the flash apparatus. With this apparatus, therefore, the operator may rely upon the appearance of this display element to insure that the firing is effected by the flash apparatus even when the object-to-camera distance is relatively small.

REFERENCES:
patent: 3340426 (1967-09-01), Elliott
patent: 3626401 (1971-12-01), Flieder et al.
patent: 3688664 (1972-09-01), Mashimo
patent: 3706911 (1972-12-01), Wilwerding
patent: 3947720 (1976-03-01), Breitkreuz

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