Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7289726 | Device for photographing provided with flash unit A lens-fitted photo film unit includes an electronic flash unit. A flash readiness indicator is secured to a housing, for illuminating to signal readiness of the flash unit upon charging. An attention information indicator having optical transmittance is secured to ... | 10/30/2007 |
| 6347189 | Flash controller of a camera A flash controller of a camera system includes a camera body and an interchangeable lens which is detachably attached to the camera body, the camera body including a built-in flash, the interchangeable lens being of a type which can have data communicatio... | 02/12/2002 |
| 6044227 | Lens-fitted photo film unit and electronic flash device for use therewith A lens-fitted photo film unit has an electronic flash device (11, 30; 115) with a printed circuit board (173). The flash device includes a flash-emitting section (6, 170) for emitting flash light toward a photographic field, and a main capacitor (31, 155)... | 03/28/2000 |
| 5574337 | Single touch flash charger control An electronic flash device including a self-oscillating charging circuit, a momentary trigger for initiating oscillations of the circuit to charge a flash capacitor, and a voltage sensing device coupled directly between the circuit and the flash capacitor... | 11/12/1996 |
| 5357297 | Camera capable of sensing deficiency in light quantity of flash and control method therefor A camera capable of sensing and indicating insufficient flash illumination which can indicate lack of illumination when an object is far away and in a low brightness condition. A central processing unit CPU of the camera is connected to a switch block inc... | 10/18/1994 |
| 5270764 | Remote controlled camera system providing indication of flash capability This invention relates to a camera which permits a shutter release operation to be performed by means of a remote-control device. The invention provides a camera system which has a display device for informing a photographer positioned at a location remot... | 12/14/1993 |
| 5264883 | Controller for camera A controller for a camera is provided with a first zoom signal output device operatively associated with the half depressing operation of a release operation member and outputting a first zoom signal for directing a photographing lens to a focal length pr... | 11/23/1993 |
| 4514074 | Exposure control circuit for TTL automatic electronic flash An exposure control circuit associated with TTL automatic electronic flash includes a diaphragm control circuit. When the electronic flash is mounted on a TTL direct photometry camera capable of photometry of reflection from a film surface in order to tak... | 04/30/1985 |
| 4362369 | Camera having a data photographing device In a camera having a flash unit for object and a data photographing device, the flash unit including means for detecting the light emission capable condition of a flash tube, the data photographing device having an optical system for imaging onto a film t... | 12/07/1982 |
| 4358187 | Automatic-light control electronic flash device for use in automatic exposure camera An automatic-light control electronic flash device used in automatic exposure camera having a gate circuit connected between an electromagnetic device for driving a shutter rear curtain and a light control signal output terminal. The gate circuit is enabl... | 11/09/1982 |
| 4064431 | Last-flash indicator for photoflash array A multiple lamp photoflash array of the FlipFlash type having flash-sequencing circuitry for causing the lamps to flash one at a time in response to firing pulses applied to the array. A radiation switch associated with the last lamp to be flashed causes ... | 12/20/1977 |
| 4053757 | Photoflash lamp array having radiation switches and flash indicators A flash lamp array having a plurality of flash lamps and containing sequencing circuitry having radiation-actuated switches respectively positioned near the upper portions of the lamps, the array also having radiation-actuated flash indicators which are r... | 10/11/1977 |
| 4048487 | Last-flash indicator switch in photoflash array A multiple lamp photoflash array of the FlipFlash type having flash-sequencing circuitry for causing the lamps to flash one at a time in response to firing pulses applied to the array. All lamp circuits except for the last-to-flash lamp provide an open ci... | 09/13/1977 |
| 4047015 | Photoflash array construction Front and back housing members interlock together and contain between them a circuit board having a plurality of flash lamps attached thereto. A multiple reflector unit is positioned between the lamps and the circuit board to direct light from flashing la... | 09/06/1977 |
| 4005449 | Flash photographic system with camera inhibit feature A flash exposure system for use with a photographic camera of a variety which automatically carries out an involved photographic cycle upon the momentary depression of a start button. The system is particularly adapted to use with a linear flash array whi... | 01/25/1977 |
