Abstract: A motion picture camera having an in-camera supplemental exposure system in which a light source within the camera is energized in synchronization with the shutter opening to provide a low-level, non-image forming exposure of the film substantially simultaneously with the image-forming exposure. The supplemental exposure light is directed to the side of the film's emulsion layer opposite from the side exposed to the image-forming light. The camera also includes an arrangement permitting adjustment of the length of time that the supplemental light remains energized, and the intensity of the supplemental light. In one embodiment selection of the wavelength of the supplemental light is also provided.

Abstract: A processing composition adapted for use in a silver diffusion transfer film unit which includes an alkali soluble borate compound.

Abstract: Translucent screens are provided comprising a dispersion of low index of refraction particles dispersed in a continuous polymeric phase of a higher index of refraction material.

Abstract: A laminar battery comprising subassemblies made by laminating cellophane to a sheet of conductive plastic on which a series of metallic electrodes have been formed in a series of regions within the confines of the sheet, in which the cellophane is caused to adhere to the plastic and to the electrode patches by feeding the cellophane and the conductive plastic between nip rolls under pressure and supplying a small amount of an aqueous bonding composition containing a small amount of a water soluble bonding agent between the layers ahead of the nip in the rolls. The laminate so made is dried in air and may be rolled for storage and later assembly into batteries. Electrical cells and batteries made with the process just outlined.

Abstract: Laminar electrical cells in which one electrode comprises a thin layer of active electrode particles adhered to a central region of a conductive plastic substrate and in contact with a central region of a separator sheet of liquid permeable material. The other electrode is a slurry dispersion of active electrode particles in an aqueous solution of electrolytes in contact with the opposite side of the separator sheet. The aqueous solution permeates the separator and both electrodes.

Abstract: A laminar battery comprising subassemblies made by laminating cellophane to a sheet of conductive plastic on which a series of metallic electrodes have been formed in a series of regions within the confines of the sheet, in which the cellophane is caused to adhere to the plastic and to the electrode patches by feeding the cellophane and the conductive plastic between nip rolls under pressure and supplying a small amount of an aqueous bonding composition containing a small amount of a water soluble bonding agent between the layers ahead of the nip in the rolls. The laminate so made is dried in air and may be rolled for storage and later assembly into batteries. Electrical cells and batteries made with the process just outlined.

Abstract: A thin flat battery comprising a plurality of cells separated by intercell connectors comprising conductive carbon in a thermoplastic resin, in which each cell consists of a cathode comprising a high viscosity mixture of manganese dioxide and carbon dispersed in an aqueous electrolyte solution and without added binder material, a dry patch zinc anode moistened with electrolyte, and a separator of regenerated cellulose between the anode and the cathode.

Abstract: An ophthalmic device comprising superposed pairs of light polarizing elements, one pair of such elements being fixed and the other pair being rotatable with respect to the fixed pair to provide a variable light transmission feature, both immediately adjacent surfaces of the superposed elements comprising a continuous coating of a hydrophobic material.

Abstract: A camera with a detachable electronic flash unit. The camera includes apparatus effective when the flash unit is detached for making an automatically controlled exposure under ambient light conditions. When the flash unit is attached, the ambient exposure control system is disabled and operation of the camera is inhibited until charging of the flash unit is initiated by pressing a button. When the flash unit is charged, the camera is enabled to make a flash exposure by triggering the flash unit, during an interval of time in which the light output of the electronic flash unit is regulated so that a uniform flash of light will be produced when the shutter is actuated.

Abstract: A method for making a self-retracting imbibition chamber by cutting a sheet, folding the sides into flanges, fluting the flanges followed by coiling and curing the material into a spring-like state.

Abstract: A first battery powers the electrical system of an automatic photographic camera throughout each cycle of operation. A second camera battery is normally electrically isolated, and is connected with the first battery selectively during each operating cycle, especially during conditions of relatively high power drain, to ensure reliable battery power.

Abstract: A compact, self-retracting imbibition chamber for cameras in which the film is ejected just after exposure and passed through processing units which distribute processing fluid throughout the film unit. The apparatus includes a normally tightly coiled imbibition chamber which receives the sheet ejected from the processing rolls and retains it in a light-protected condition until it is sufficiently processed to allow it to be exposed to the light.

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 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: 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: A camera is provided with a built-in electronic flash unit, a viewfinder for simultaneously framing an image and for selectively displaying a number of indications, a circuit for sensing the state of charge of the flash unit and the ambient light level, a pair of shutter buttons, and apparatus controlled by both the shutter buttons and the sensing circuit for selectively making a flash exposure, making an ambient light exposure, or displaying an appropriate indication to the operator.

Abstract: A system for mounting accessories, e.g., filters, supplementary lenses, lens shades, etc., on a compact camera housing including a flash unit receiving socket. The system includes an accessory holder that is adapted to be connected to the camera flash socket to hold it on the housing. The holder includes a flash socket that is operatively connected to the camera socket when the holder is coupled thereto. Also special accessory mounts are provided for attaching accessories to the holder.

Abstract: A battery operated camera includes a carrying strap having members thereon for receiving the opposite ends of a battery for powering electrical components of the camera. The battery includes structure thereon for attaching it to the carrying strap so that a major portion of the battery serves as a carrying handle on the strap.

Abstract: A planar primary battery particularly suited for photographic applications characterized in exhibiting high current drain capacity. The battery structure includes positive active components including two cathode strata, one cathode stratum being a slurry of a particulate cathode active material in aqueous electrolyte, the other cathode stratum comprising a particulate dispersion of dry cathode active particles in a binder matrix bonded to the surface of a polymeric current collector.