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Searching: photography





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Patent # Description
US-3,952,190 Underwater strobe flash unit
A method of waterproofing a strobe flash unit for use in underwater photography. A mold is formed and a strobe flash unit is mounted within the mold. Epoxy resin...
US-3,950,776 Ski position simulator
A ski position simulator for use in photography and the like to enable a subject to assume and maintain position like that of a jumping skier has an elevated...
US-3,947,861 Film frame counting devices for still cameras
A counting device in a still camera for indicating the exact number of frames of long-footage film exposed during regular photography includes a numerical...
US-3,947,272 Silver halide emulsions containing 2-pyrazolon-5-one photographic colour couplers
Novel magenta forming colour couplers for use in silver halide colour photography are described which correspond to the formula: ##EQU1## wherein R.sub.1...
US-3,946,410 Electromagnetic trigger device
A capacitor-energized electromagnetic trigger device controls the energization of a camera motor which drives a film transport and shutter mechanism. For...
US-3,945,999 Process for preparing solid bis-(4-furfurylidenamino-phenyl)-methane
Bis-(4-furfurylidenamino-phenyl)-methane, m.p. 90.degree.-91.degree.C., is made by reacting furfural with bis-(4-aminophenyl)-methane in diethyl ether. It is...
US-3,945,822 Image intensification process
A photographic material comprising a support coated at one side with one or more silver halide emulsion layers and at the opposite side with an electroconductive...
US-3,934,259 All-sky camera apparatus for time-resolved lightning photography
A pair of all-sky cameras each equipped with a 220.degree. Fisheye-Nikkor ns are disposed with their lenses pointing vertically. One of the cameras is rotated...
US-3,932,185 Multi-layer photosensitive material for color photography
A multi-layer photosensitive material for color photography comprising a support and coated thereon, a first color image-forming layer unit composed of a...
US-3,930,861 Silver halide emulsions containing 3-anilino-2-pyrazolin-5-one color couplers
Novel magenta-forming 3-anilino-2-pyrazolin-5-one colour couplers for use in silver halide photography are described wherein the anilino group carries an...
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