Electric lamp and discharge devices: systems – Condenser in the supply circuit – Condenser in shunt to the load device and the supply
Patent
1974-06-13
1976-03-16
Kominski, John
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Condenser in shunt to the load device and the supply
250214P, 250206, 315149, 315155, H05B 4130
Patent
active
039448770
ABSTRACT:
A wireless multiflashlight apparatus simultaneously illuminates a subject by flashlight rays emitted from a main flashlight device mounted on a photographic camera and at least one additional flashlight device located at suitable position away from the main flashlight device. In the main flashlight device is provided a flash tube arranged to emit substantially two or more flashlight rays at a predetermined time interval therebetween upon the shutter operation of an associated camera. In the additional flashlight device are provided a decoder for producing an outlet signal only upon receipt of the flashlight rays from the main flashlight device through a photo-electric conversion element and an amplifier, and a flash tube operative to be triggered only by the output signal from the decoder. The additional flashlight device is protected from inadvertently flashing even upon reception of any flashlight rays from other flashlight devices than the associated main flashlight device.
REFERENCES:
patent: 3156827 (1964-11-01), Porteous et al.
patent: 3196275 (1965-07-01), Atkins et al.
radio & Television News, "A Wireless Extension Flash Unit" pp. 64, 65 Oct. 1949, by G. Southworth.
Kominski John
Satoh Cohki Co., Ltd.
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