Patent
1977-05-19
1979-05-01
Gellner, Michael
354 60L, G03B 708, G03B 1505
Patent
active
041520556
ABSTRACT:
A device for visually indicating the camera incident light conditions and the readiness of an associated photoflash network on a single element includes an incandescent indicating lamp connected through parallel transistors to a current source. One transistor is controlled in response to the light incident on a photoconductor to apply a steady current to the lamp when the photoconductor incident light is below a predetermined level. The other transistor is controlled by a relax action oscillator including the photoflash triggering capacitor to apply an intermittent current at a visually perceptable frequency to the lamp when the charge on the photoflash main capacitor is at least at a predetermined value. The lamp is advantageously located as to be visible through the camera view finder.
REFERENCES:
patent: 3688664 (1972-09-01), Mashimo
Ohta Yoshiharu
Tominaga Shinji
Gellner Michael
Minolta Camera Kabushiki Kaisha
LandOfFree
Device for indicating light and photoflash circuit conditions in does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for indicating light and photoflash circuit conditions in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for indicating light and photoflash circuit conditions in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-628210