Electronic flash unit serving both as transmitter of a remote control and flash unit for flash photography

Abstract

In an electronic flash unit serving both as the transmitter of a remote control device and a flash unit for flash photography, there is provided a power source, a flash discharge tube, and a discharging circuit having an interlocking switch adapted to be closed in response to electrical connection of the flash unit to the synchro contacts of a camera. The discharging circuit may produce a greater magnitude of discharging current for the flashing of the discharge tube during the closing of the switch than during the opening of the switch. The flash unit further includes a trigger circuit having an extraneously operable trigger switch and effective to trigger the flash discharge tube to effect the discharge of the discharging circuit. Thus, the quantity of flash light emitted from the flash discharge tube is less during the disconnection of the flash unit to the camera's synchro contacts than during the connection of the flash unit to said synchro contacts.

Dependencies are inferred from the claim text.