Photography – With object illumination for exposure – Having indicator
Reexamination Certificate
2005-10-18
2005-10-18
Perkey, W. B. (Department: 2851)
Photography
With object illumination for exposure
Having indicator
C396S206000
Reexamination Certificate
active
06957017
ABSTRACT:
A strobe device including a light-emitting tube, a main capacitor which accumulates energy and which supplies the energy to the light-emitting tube, a transformer circuit which includes primary and secondary coils in order to accumulate the energy of a power supply in the main capacitor, wherein the primary coil is connected to the power supply and the secondary coil is connected to the main capacitor, a control circuit which controls a current flowing from the power supply to the primary coil, wherein a current starts to flow through the secondary coil after the control circuit stops a current flowing through the primary coil, and a determination circuit which determines that a malfunction has occurred in accordance with a current flowing through the secondary coil.
REFERENCES:
patent: 4272806 (1981-06-01), Metzger
patent: 4496939 (1985-01-01), Moberg
patent: 5913085 (1999-06-01), Yamaguchi et al.
patent: 6317565 (2001-11-01), Ichimasa
patent: 6785470 (2004-08-01), Ichimasa
patent: 8-8089 (1996-01-01), None
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