Electric lamp and discharge devices: systems – Condenser in the supply circuit – Condenser in shunt to the load device and the supply
Patent
1976-01-20
1977-09-13
La Roche, Eugene R.
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Condenser in shunt to the load device and the supply
354129, 354140, 354141, H05B 4132
Patent
active
040485404
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.
REFERENCES:
patent: 3335650 (1967-08-01), Schmidt et al.
Igarashi Shigemi
Iida Yozo
Kawahara Yasuhito
La Roche Eugene R.
Nippon Kogaku K.K.
Sato Koki K.K.
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