Abstract: The present invention provides an electric flash apparatus which comprises power supplying means, trigger signal generating means, flashlight generating means, trigger signal controlling means for controlling the trigger signal generating means and flashlight quantity control means for adjusting automatically the light quantity of the flashlight. The electric flash apparatus of the invention can operate as a mono-flashing device and as a multi-flashing device, and the electric flash apparatus of the invention further can control quantity of the flashlight of a flash tube in both of the mono-flashing operation and the multi-flashing operation, in spite of the photographing distance.

Abstract: The invention provides an electric flash apparatus comprising a first flash unit incorporated into a camera, a second flash unit mounted detachably and outwardly on said camera, light quantity control means for controlling flash light of said first and second flash unit, flash timing control means for controlling flash lights of said first and second flash unit and a flash driving circuit commonly used to said first and second flash units. The flash driving circuit can activate the flash operations of at one of said flash units, both of said first flash unit and said second flash unit.

Abstract: This invention concerns to a power supply arrangement which comprises, substantially, a power source circuit, a voltage converter circuit for converting a direct current voltage from the direct current power source circuit into an alternating current voltage, and a rectifier circuit for rectifying the alternating current voltage to a high direct current voltage to be applied to a load. The voltage converter circuit includes an oscillating transformer and an oscillation switching element. The oscillating transformer is provided with only two windings, and these windings are effectively employed to activate the voltage converter circuit.

Abstract: An electronic flash device having a battery, means for converting the battery voltage to alternating current voltage, means for rectifying the alternating current voltage to direct current voltage, a main storage capacitor charged by the direct current voltage, a flash tube in parallel with the storage capacitor, a trigger circuit for firing the flash tube and a control circuit for stopping the flash operation of the flash tube when a predetermined amount of light has been reflected from an object to be photographed. The control circuit is actuated by a light measuring circuit which senses the reflected light. A switch element connects the light measuring circuit to the battery during activation of the flash tube.

Abstract: A flash device of the invention comprises, substantially, a flash unit for generating flash light and a flash control unit for controlling the flash light generated from said flash unit. The flash unit comprises electric power supplying means for supplying electric power, electric energy storing means for storing the electric energy supplied from said electric power supplying means, flash light generating means for converting the electrical energy stored in said electric energy storing means to an optical energy, and said flash control unit comprises, substantially, light receiving means for receiving a reflecting light, flash light quantity detecting means for detecting flash light quantity, means for indicating light exposure quantity, and flash light quantity control means. The flash device of the present invention is convenient to adjust the photographing distance and a diaphragm of a camera in photographing.

Abstract: An electric flash device comprises a housing, a flash unit mounted in the housing and having a reflector which comprises a frame, a reflecting mirror carried by the frame, and a flash tube inserted into the reflecting mirror and having at least one pair of main current electrodes and a trigger electrode for triggering the flash tube and electrically connected to the reflecting mirror, the frame of the reflector being formed integrally with the housing.

Abstract: An electric flash device for camera of the present invention comprises, substantially, a first flash unit incorporated into a camera, and a second flash unit operated associating with the flash operation of the first flash unit, said second flash unit comprises flash starting means for starting a flash operation of a flash tube by means of receiving a flash light from said first flash unit. The electric flash device of the present invention further comprises means for eliminating or reducing flash light quantity of said flash tube of said second flash unit.

Abstract: An electric flash apparatus of the present invention comprises a first flashing member having at least one first flash tube, a second flashing member having at least one second flash tube and a flash control arrangement for controlling flashing of said flashing members. The flash control arrangement includes a rectifying circuit, an electric charge storing circuit and a flash tube circuit member. The electric charge storing circuit is provided a first main storage capacitor for supplying the electric energy to the first flash tube and a second main storage capacitor for supplying the electric energy to the second flash tube. The flash tube circuit member is provided with a flash light control means for adjusting quantity of the first and the second flash tubes and a flash timing control means for controlling the flash durations of said flash tubes in order to facilitate the good flashing performance.

Abstract: This invention discloses an electric flash device which comprises a direct current power source circuit, a flash tube circuit including a flash tube, a voltage convertor including an oscillator circuit, an oscillating transformer and an oscillation starting circuit, a rectifier circuit for rectifying an altanating current voltage from the voltage convertor and a charging circuit including a main storage capacitor for storing an electric energy to be supplied to the flash tube, a triggering circuit for firing the flash tube, said oscillator circuit includes an oscillating switching element which has a high leak resistance, and said oscillation starting circuit includes a switch element for starting the actuation of said voltage convertor.

Abstract: A photographic camera of the present invention comprises a camera unit and a flash unit pivotably mounted on said camera unit. The camera unit comprises a light-tight housing, a light receiving member for receiving light reflected from an object to be photographed and mounted on the housing. The flash unit comprises a casing which is pivotably connected to said housing by a connecting member and a flash member for producing a flash light. Said casing of the flash unit serves as a cover of said light receiving member.

Abstract: This invention discloses a electric flash apparatus comprising a flash housing which consists of a first casing and a second casing, each of which is pivotably connected, a first flashing member having at least one flash tube and arranged in said first casing, a second flashing member including at least one flash tube and arranged in the second casing, and a flash control circuit arrangement for controlling effectively quantity and a flash duration of flash light of said flash tubes.

Abstract: The present invention relates to an electric flash device and, more particularly, to an improvement of the mechanical construction of a flashing member in the electric flash device.