Abstract: A film strip heating method and apparatus for use in photographic systems of the type in which a film strip, contained in a multi-purpose cassette during exposure, processing and projection, is processed by insertion of the cassette in a viewer operative to release a cassette-contained supply of processing fluid, and in which localized heating of the film strip is effected during the processing operation to enhance the diffusion transfer developing process. Heating and temperature sensing components located in the cassette are connected with a control circuit in the viewer automatically upon insertion of the cassette in the viewer.

Abstract: Transparent elements useful as supports for photographic image-carrying and/or image-recording layers are provided comprising a polymeric film base having an anti-reflection coating on one surface. Image-carrying and/or image-recording layers may be coated on the opposed surface. Such transparent supports are particularly useful in photographic products wherein the final image is formed by multicolor diffusion transfer processes using dye developers or other image dye-providing materials. In the preferred embodiments, the photographic image is an integral negative-positive reflection print. Where photoexposure is effected through a transparent support, e.g., the transparent support through which the final image is viewed, provision of an anti-reflection coating on said support and effecting photoexposure therethrough will permit more effective recording of light passing through the camera lens.The polymeric film base of the transparent element has an index of refraction of at least 1.

Abstract: A photoresponsive, shutter-diaphragm exposure control system having light regulating blades displaced from a light-blocking position to define increasing aperture values during an exposure interval includes a source of flash illumination which is energized with or just prior to initiation of the exposure interval for flash operation. In this arrangement, the flash illumination envelope is superimposed in a leading arrangement on the aperture opening curve so as to provide increasing illumination intensity in slightly leading relation to the increasing aperture values.

Abstract: Alkanes containing an intralinear sulfonyl group and an intralinear 1-piperazinylsulfonamido group separated by a single carbon substituted with at least one hydrogen atom are employed as silver halide solvents in photographic processes and compositions.

Abstract: A photographic apparatus including a "sequencing system" for initiating and controlling the orderly performance of functions in a cycle of apparatus operation that includes the exposing and processing of a self-developing film unit. The "sequencing system" includes a sequencing gear which makes a single revolution during the operating cycle and preferably initiates, controls and/or performs the function of selectively latching and unlatching a shutter, operating an electrical power switch, operating a film advance device and indexing a film counting device.

Abstract: An extended range exposure control system for photographic cameras having an aperture plate slidably movable from a first position in which it stops down the maximum relative aperture of the camera lens to second and third positions in which a photographic circuit is altered while the maximum relative lens aperture is maintained. A shutter mechanism controlled by a light sensitive circuit includes a switch actuated by movement of the aperture plate to the third position to shift the light level sensitivity range of the circuit thereby accommodating shutter speeds necessary to effect exposure of relatively fast film at maximum relative lens aperture. The aperture plate is slidably supported within a housing for the shutter and the respective positions thereof made clearly visible as a result of indicia on the exterior of the housing.

Abstract: A folding handle for photographic cameras of the type in which a film sheet assembly is withdrawn manually from the camera housing to effect spreading of processing fluid over the area of the sheet material during such withdrawal. The handle is connected to the camera housing on the end thereof opposite from the end at which the film is withdrawn in a manner to partially restrain relative rotational movement of the handle and the camera housing along the axis of film withdrawal but to allow freedom of rotation between the handle and the housing on all other axes. The handle is provided with a rectangular bail and is foldable to the recessed position in the camera housing during periods of nonuse.

Abstract: A planar primary battery particularly suited for a photographic application characterized in exhibiting high current drain capacities and improved manufacturability. The battery structure incorporates at least one electrode present in aqueous slurry form as a particulate dispersion of active material and an inorganic particulate additive in combination with electrolyte. This slurry combination, functioning in the absence of dispersing or binding agents present in the form of hydrophilic polymers and the like, provides for batteries exhibiting enhanced performance characteristics.

Abstract: A gaseous fluid is combined with a liquid to form a transient foam for processing the fluid as by compression, expansion, condensation, heat exchange or chemical reaction.

Abstract: A unicell radiation measuring device having a single electrical output signal that can be correlated with film sensitometric characteristics and scene object luminance patterns to either predict photographic exposures directly, or alternatively, used as an input function for controlling a camera exposure control system. The device consists of an optical system having a single optical element for collecting and directing radiation from a scene onto the surface of a photoelectric transducer element having a spectral sensitivity substantially identical to the photopic visual response curve of the standard photometric observer according to the CIE thereby qualifying it as a photometer. The optical element consists of a central circular planar portion of uniform thickness surrounded by an annular positive lens portion having radially decreasing thickness. Both portions are integrally molded to provide the optical element with a unitary construction that is rotationally symmetric.

Abstract: In one embodiment, the present invention relates to novel heterocyclic compounds as represented in the following formula ##STR1## wherein R and R' each are hydrogen or alkyl, Y is .dbd.O or .dbd.NH and n is a positive integer from 1 to 7.In another embodiment, the present invention is directed to the use of the above-denoted class of heterocyclic compounds as photographic silver halide developing agents and to photographic processes, products and compositions employing the same.

Abstract: Integral negative-positive diffusion transfer reflection prints are provided with a non-planar, e.g., lenticular, surface through which the transfer image is viewed.

Abstract: A camera having a recess in an exterior surface thereof and a battery assembly having mounting structure adapted to be slidably received by the recess for attaching the battery assembly to the camera to provide a source of energy for operating various components of the camera.

Abstract: This invention relates to a photographic camera having an automatic shutter latch mechanism which may be released in response to initial shutter blade movement resulting from energization of the shutter drive means and which may thereafter be moved into position to accommodate relatching of the shutter blades in response to film advancement. The automatic shutter latch mechanism is also responsive to initial shutter blade movement resulting from manually actuated energization of the electrical shutter drive means for actuating a power interlock switch to maintain the electrical energization of a photographic exposure control system after manual deactuation by the user. In addition, the shutter latch mechanism includes a shock stabilizing arrangement to inhibit the accidental unlatching of the shutter blade mechanism resulting from shutter blade movement occassioned through extraneous vibrations, sudden shock or otherwise and not through actuation of the shutter drive means.

Abstract: A time delay circuit is provided to control a quench strobe so that the quench strobe may be utilized in conjunction with a camera of the type having an automatic exposure control system for controlling a pair of scanning shutter blade elements having respective primary apertures therethrough for collectively defining a gradually varying effective aperture size as a function of the position of the blade elements together with corresponding photocell sweep secondary apertures therethrough for movement in correspondence with the primary apertures to define a small secondary effective aperture for admitting the passage of scene light to a photocell.

Abstract: This application relates to procedures wherein a photographic image in silver prepared by diffusion transfer is treated in such a manner as to provide a printing plate or inking master useful in photomechanical reproduction or to provide a non-silver image of the original subject matter, e.g., a document or the like to be reproduced.

Abstract: This invention relates to a shock inhibiting means for use with an automatic shutter latch mechanism of the type which may be released in response to initial shutter blade movement resulting from energization of the shutter drive means and which may thereafter be moved into position to accommodate relatching of the shutter blades in response to film advancement. The shock inhibiting means operates to positively inhibit the accidental unlatching of the shutter blade mechanism resulting from shutter blade movement which might otherwise be occasioned through extraneous vibrations, sudden shock or jarring, and not through intentional actuation of the shutter drive means.

Abstract: This invention relates to derivatives of phthalaldehydic and naphthalaldehydic acid useful as intermediates in the preparation of pH-sensitive phthalide and naphthalide indicator dyes.A class of intermediates provided by the present invention comprises compounds of the formula: ##STR1## wherein A represents 4'-hydroxy-1'-naphthyl; B represents 4'-hydroxy-1'-naphthyl or indol-3-yl and C represents a 2-carboxy-1-phenyl radical or an 8-carboxy-1-naphthyl radical and preferably is 8-carboxy-1-naphthyl.

Abstract: Compounds defined by the following general formula: ##STR1## wherein: X is methyl, methoxy, hydroxy, amino, chloro or carboxy;m is a positive integer from 1 to 2; andA is alkyl having from 9-17 carbon atoms.The compounds of this invention are particularly useful as intermediates for producing photographic dyes.

Abstract: An exposure control system is provided for a photographic apparatus of the type which may be used in conjunction with a source of artificial illumination to illuminate darkened portions of a photographic subject under relatively high levels of ambient scene light intensity. The exposure control system includes means for programming the exposure control in a select manner so as to respond to the artificial light source being utilized under relatively high levels of ambient scene light intensity. The exposure is programmed by determining the exposure interval as a function of whether the artificial light source is ignited in an ordinary manner after a predetermined time delay subsequent to the commencement of the exposure cycle or in a so called "fill-in flash" manner as a function of the integrated ambient scene light intensity reaching a predetermined level.