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Searching: photography





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Patent # Description
US-3,966,475 Photographic silver halide emulsions containing acylacetanilide color couplers
Novel yellow forming color couplers for use in silver halide color photography are described which correspond to the formula: wherein R represents alkyl or phenyl, X...
US-3,964,080 Electromagnetic trigger device in a camera capable of effecting time photography
In an electromagnetic trigger device in a camera capable of effecting time photography, and having a trigger switch, a power source and a motor for driving a...
US-3,963,968 Intervalometer apparatus
A timing and actuating assembly for a camera to permit time lapse photography includes a solenoid operated shutter release mechanism which is actuated by an...
US-3,963,497 X-ray film with hydrophillic layer containing developing and fixing agents
This invention relates to x-ray photography and more specifically to a film sensitive to x-rays wherein both developing and fixing chemicals are contained within...
US-3,961,342 Remote control photographic apparatus
Remote control apparatus for cameras having an automatic exposure control circuit and a mechanaism for operating the shutter and advancing the film in the camera...
US-3,960,737 Negatively charged liquid developer for use in electrostatic photography
Negatively charged liquid developers for use in electrostatic photography which comprises a highly insulating carrier liquid and, dispersed therein, a toner...
US-3,960,558 Dye free, spectrally sensitive silver halide layers in diffusion transfer films
The present invention relates to photography, particularly, to photographic products specifically adapted for employment in specified photographic diffusion...
US-3,960,557 Polydispersed silver halide emulsions with iodide for use in diffusion transfer
The present invention relates to photography and, more particularly, to diffusion transfer process photographic film units which comprise a photosensitive...
US-3,959,803 Instantaneous photography camera
Disclosed herein is an improved instantaneous photography camera for use in the manufacture of photographic identification cards. The camera is of the type in...
US-3,958,992 1,3-Disulfonylcycloalkanes as silver halide solvents
1,3-disulfonylcycloalkanes substituted in the 2-position with at least one hydrogen atom are employed as silver halide complexing agents in both conventional and...
US-3,957,513 Method of free radical photography utilizing a short light flash for exposure
Novel method of free radical photography in which a colored image excellent in photographic properties such as gradient, resolving power, image stability, amount...
US-3,954,853 Substituted phenoxy-3-chloro-malealdehydic acids
Tanning (hardening) agents in a colloid layer of gelatin or the like are inactive at ordinary temperatures but are activated at temperatures above 70.degree.C....
US-3,953,869 Stereoscopic photography apparatus
In the illustrative embodiments of the invention disclosed, autostereoscopic pictures are produced by taking a series of two-dimensional views of an object field...
US-3,953,303 Process for the manufacture of mesh screen for X-ray photography sensitization
A process for the manufacture of mesh screen for the sensitization of X-ray photography which comprises forming a heavy metal layer and a sensitive polymer layer...
US-3,953,135 Curve analysis method in color photography
A method of approximating the characteristic curves of a color film exposed at a variety of color temperatures is provided. The method involves the use of a linear...
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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