|
Match
|
Document |
Document Title |
|
|
4717861 |
Electronic flash device
An electronic flash device fires one or a pair of flash tube sequentially for continuous shooting photography with a motor driven photographic camera, for substantially continuous illumination or...
|
|
|
4701672 |
Strobe flash monitor
The operation of a strobe lighting system is electronically monitored from a remote location to verify proper operation of all of the individual elements of the system. A current sensor is coupled...
|
|
|
4697906 |
Electric flash device
An electric flash device for photography is controlled of its light radiation of a flash tube by a transistor, which is connected in series with the flash tube and is given its base current through...
|
|
|
4697907 |
Flash photographing system
In a flash photographing system including a camera having a light output control circuit for producing a stop of light emission signal when a light intensity of an illumination light reflected by...
|
|
|
4678450 |
Toy light sword
A toy light sword including a hollow blade with a fluorescent coating on the inside, or it may be translucent and tend to glow when illuminated. A stroboscopic lamp unit is discharged by a switch...
|
|
|
4677347 |
Electronic flash
An electronic flash includes a main capacitor having a discharge loop in which a circuit arrangement including a flash discharge tube, a switching element and an emission controlling capacitor is...
|
|
|
4673845 |
Electronic flash apparatus
In an electronic flash apparatus which is provided with a first discharge tube for bounce illumination and a second flash discharge tube for direct illumination, emission of flash light by the...
|
|
|
RE32437 |
Light measuring device for flash photography
The disclosure is directed to an improved light measuring device which is used in flash photography for measuring a preliminary flash light to obtain camera exposure informations for photography...
|
|
|
4672273 |
Electronic flash device for camera
The enclosed electronic flash device for a camera includes a booster circuit connectible to an electrical power source or battery, a high voltage rectifier diode for rectifying the output of the...
|
|
|
4660956 |
Electronic flash device
An amplification factor selection circuit for an automatic light emission control circuit which enables selection of an amplification factor in accordance with an F-value, comprises a flash bulb...
|
|
|
4652108 |
Driving device for illuminating lamp of flash apparatus
Driving device for illuminating lamp of flash apparatus comprises means for detecting supplied voltage supplied to the illuminating lamp and generating a detection signal corresponding to thus...
|
|
|
4628229 |
Flashlight emission apparatus
A flashlight emission apparatus is provided which inhibits the emission of flashlight from a flash discharge tube before a voltage to which a main discharge capacitor is charged reaches a proper...
|
|
|
4626093 |
Flash control device for electronic flash apparatus
An electronic flash apparatus for flash photographing comprises flash discharge means, means for supplying a voltage to the flash discharge means, first light emission control means comprising...
|
|
|
4626748 |
Electronic flash of series controlled type
An electronic flash of series controlled type is provided. It comprises a series connection of a flash discharge tube and a main thyristor, which series connection is further connected in series...
|
|
|
4625151 |
Flash device with back-up capacitor voltage supply
The disclosed flash device is of the kind that incorporates an integrated processing circuit requiring a stable voltage, but one and the same battery supplies both a booster circuit and the...
|
|
|
4623824 |
Controlled high voltage generator
A highly efficient circuit for converting a low level DC voltage to the high voltage necessary for energizing a flash lamp. The circuit is very small and non-complex, it is portable and is quickly...
|
|
|
4610521 |
Power supply unit for electronic flash
A power supply unit for electronic flash includes a converter drive circuit which is activated when a main switch is turned on or in response to the completion of a shutter operation or the...
|
|
|
4609851 |
Electronic flash system with control of commutation capacitor
An electronic flash including a discharge flash tube controlled by a first switch and a commutation capacitor for controlling the first switch. There is provided a second switch for governing the...
|
|
|
4603958 |
Automatic electronic flash
An automatic electronic flash measures brightness of a predetermined photographing angle including a photographic object, and using the measured brightness and film sensitivity indicates a stop...
|
|
|
4602194 |
Exciting circuit for electronic flash device
An excitation circuit for an electronic flash device for a photographic camera is arranged to energize the flashtube in a plurality of successive steps for each shot. In each of the successive...
|
|
|
4555648 |
Electronic flash unit utilizing pre-flash illumination of flashtube
An electronic flash unit for emitting flashlight toward an object to be photographed in order that a camera may obtain proper exposure comprises flash means having a flash tube which emits...
|
|
|
4551011 |
Light source for exposure
An exposure light source device wherein a control circuit 1 controls a light source for emitting pulse lights, with respect to the member of light emissions and the amount of light emitted at each...
|
|
|
4540265 |
Energy-saving electronic flash apparatus
An energy-saving electronic flash unit for a rapid sequence of flash exposures includes status indicator apparatus operable for signaling the readiness of the flash unit for the next flash in the...
|
|
|
4530550 |
Power supply unit for electronic flash
A power supply unit for electronic flash includes a plurality of charging units connected to a main capacitor of an electronic flash through diodes which prevent a reverse current flow. Each...
|
|
|
4523248 |
Safety circuit for a detachable connecting cable
A power supply system comprising an a.c. voltage source (ACS), a load (LL) and a detachable (DCC) cable connection (CC). In order to prevent a dangerously high a.c. voltage from occurring between...
|
|
|
4522479 |
Flash apparatus with power supply control device
Disclosed is a power supply control device which automatically cuts off power to a flash apparatus by turning off a power switch a predetermined time after the switch is turned on to prevent waste...
|
|
|
4510419 |
Grip-type photographic flash discharge device
A photographic flash device comprising a grip portion and a flash unit removably attachable thereto. Both the grip portion and flash unit house battery-powered DC-DC converters which cooperate upon...
|
|
|
4500190 |
Camera system including flash and status indicating control circuit
A camera flash device is provided for photography requiring the use of a flash by transmitting plural information from the flash side to the camera side. The flash device includes a plural flash...
|
|
|
4496939 |
Power indicator apparatus for a DC to DC flyback converter
A battery power indicator for a DC to DC flyback converter is responsive to the current flowing in the secondary winding of the converter's transformer. In one embodiment the power indicator is...
|
|
|
4495447 |
DC-DC Converter circuit
A DC-DC converter circuit particularly for use in a photographic flash light emitting device for producing high DC voltage from a low DC voltage such as a battery. Heretofore, the converter...
|
|
|
4486691 |
Sequential capacitive discharge circuit for flash lamps
A method of reliably operating flashlamps with most of the stored energy charged to a voltage below the minimum specified electrode voltage is also disclosed. The flashlamp discharge control method...
|
|
|
4486690 |
Test flash device for flash discharger
A test flash device in a photographic flash discharger which includes a photometric circuit including an integrator and exposed to light emitted from a flash discharger tube and reflected by an...
|
|
|
4486086 |
Electronic flash apparatus
Electronic flash apparatus produces a variable amount of flash illumination corresponding to pre-flash photographic conditions, i.e. subject distance, film speed, ambient light intensity, etc....
|
|
|
4485336 |
Electronic flash device
In an electronic flash device for use in a still camera, a calculation circuit means calculates a ratio of the amounts of light to be emitted by a plurality of flash light tubes on the basis of...
|
|
|
4479076 |
Power saving device for electronic flash
A power saving device for use in a power supply circuit has an electronic switching element which is turned on when a pushbutton normally open type switch is closed to actuate a DC-DC converter and...
|
|
|
4469990 |
Electronic flash device
In an electronic flash device of the type having a power supply unit comprising a low DC power supply and a DC-DC converter and an IC memory which can maintain its stored information even if when a...
|
|
|
4469989 |
Electric flash apparatus
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...
|
|
|
4468592 |
Strobo apparatus
In a strobo apparatus comprising a power source part (A) containing a low voltage battery and a DC-DC converter circuit, a flashing part (B) containing a main capacitor and being separably...
|
|
|
4467248 |
Variable electronic flash light equipment
A variable illumination flash apparatus includes a main capacitor in parallel with a flash lamp and power source for normally supporting triggered discharge illumination of the lamp. A plurality of...
|
|
|
4464609 |
Flash lighting unit for a camera
A voltage detecting means is provided in a flash lamp firing circuit for detecting the attainment of the voltage of a storage capacitor to a satisfactory lamp firing voltage level to assure that a...
|
|
|
4464608 |
Circuit for controlling optical apparatus such as an ophthalmoscope
A circuit for operating and controlling optical apparatus for viewing an object and making a photographic record thereof and having an illuminating light source and a photoflash light source, the...
|
|
|
4457601 |
Camera with electrical shutter
A camera with an electrical shutter comprises auxiliary shutter closing means which is responsive to an electrical signal supplied from an electronic flash to operate a photometric circuit of the...
|
|
|
4453110 |
Strobo flash apparatus
In a strobo flash apparatus comprising a power source part and an exchangeable flashing part, the power source part includes a DC-DC converter circuit for inducing a D.C. high voltage and has a...
|
|
|
4441774 |
Flash device of a camera
A flash device for photography includes a DC/DC converter for boosting a DC power source voltage and applying a voltage to a main capacitor for supplying an energy for driving a flashlight tube....
|
|
|
4436396 |
Electroflash unit
In an electroflash unit attachable to a camera provided with a circuit for measuring light transmitted through a photographing lens, a signal by which TTL flash output control circuit on the...
|
|
|
4430602 |
Electronic flash device
In the disclosed device, a DC-DC converter boosts the output of a battery to charge a capacitor that stores electrical energy to be converted into light energy and turns on a neon tube when the...
|
|
|
4425531 |
Electronic flash unit assembly
An electronic flash unit assembly having an electronic flash module separate from a power and control module. An assembly of articulated flash arms supports the flash module spaced from a camera. A...
|
|
|
4416524 |
Light source device for an endoscope
A photoreceptor is provided directly for receiving a light emitted from an electronic flash unit, and an output of the photoreceptor is supplied to a light emission amount calculating circuit. The...
|
|
|
4415840 |
Combined flash tube and quench tube apparatus
Discharge apparatus comprises a xenon-filled glass envelope with a common cathode that divides the envelope into two separate gas-containing chambers. Respective anodes are provided in each chamber...
|
|
|
4404497 |
Power supplying apparatus
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...
|