Photography – With object illumination for exposure – With power supply detail
Patent
1997-01-08
1998-03-17
Adams, Russell E.
Photography
With object illumination for exposure
With power supply detail
396302, G03B 726
Patent
active
057297746
ABSTRACT:
In a single use camera having a flash circuit and a film drive motor operated from a single battery source, a control circuit is provided with a diode that is coupled from a terminal on the motor control switch to the flash charging circuit to suppress operation of the flash charging circuit while the film drive motor is operating to advance the film after a picture taking event. The motor OFF position of the control switch is connected to battery positive terminal and the control circuit includes a capacitive connection from the switch to the flash charging circuit such that when the motor switch changes over from the motor ON to motor OFF position, a positive pulse is applied to restart operation of the flash charging circuit when the motor is turned off. This arrangement suppresses operation of the flash charging circuit while the motor is running, allowing full battery current to be applied to the motor. The control circuit is not a part of the primary flash charging circuit path thus it does not adversely affect the charging cycle time.
REFERENCES:
patent: 4220407 (1980-09-01), Stemme et al.
patent: 4273432 (1981-06-01), Matsuda et al.
patent: 4426144 (1984-01-01), Kawazoe
patent: 4509843 (1985-04-01), Hasegawa
patent: 4566769 (1986-01-01), Inoue
patent: 5309195 (1994-05-01), Goo et al.
Adams Russell E.
Boos, Jr. Francis H.
Eastman Kodak Company
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