Automatic photoflash device

Details Automatic photoflash device Automatic photoflash device

1981-02-23

1982-08-17

Adams, Russell E.

354145, 354289, G03B 1502

Patent

active

043446841

ABSTRACT:
An automatic photoflash device wherein detection is made of a level of voltage charged in a main capacitor for supplying discharge energy to an electronic flash tube and also of a level of voltage charged in a quenching capacitor of a quenching circuit to interrupt the flash irradiation of the electronic flash tube. The subject automatic photoflash device comprises an alarm unit, which, when a voltage charged in the main capacitor has a lower level than required to allow for the light emission of the flash device, gives a first alarm, and, when a voltage charged in the quenching capacitor has too low a level to allow for the quenching of the flash tube, sends forth a second alarm.

REFERENCES:
patent: 2719288 (1955-09-01), Young
patent: 3591829 (1971-07-01), Murata
patent: 3626401 (1971-12-01), Flieder
patent: 3898514 (1975-08-01), Takahashi
patent: 3953928 (1976-11-01), Wilwerding
patent: 4122465 (1978-10-01), Hasegawa
patent: 4193677 (1980-03-01), Hasegawa et al.

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