Abstract: A window construction adapted to permit or prevent the transmission of light including first and second fixed polarizer panels, the first of which comprises two adjacent polarizers which are in the same plane, and have their absorption axes perpendicular to each other, and a moveable panel between the fixed panels comprising a wave retarder. The absorption axis of the second polarizer panel is perpendicular to either absorption axis of the polarizers comprising the first panel so that maximum or minimum light transmission through the construction is effected by moving the wave retarder between the fixed polarizer panels. The fixed polarizer panels are generally coincident in size and shape and are positioned in parallel planes.

Abstract: Spectacles are provided which comprise lenses having a transparent substrate upon which a continuous transparent metallic layer is vapor deposited. Coated thereover is a continuous layer of a dielectric material which is an odd multiple of one-quarter wavelength of a reference color in thickness.

Abstract: A flat battery structure and method of fabricating it which is characterized in the utilization of an electrically insulative carrier web base in combination with discretely positioned electrically conductive components of the battery pile structure. Through the select dimensioning of the discrete components of the battery, in conjunction with the utilization of insulative web carriers, improved reliability of battery operation is realized.

Abstract: Variable density spectacles comprising a pair of superposed iodine stained light polarizing elements, one of such elements being rotatable through an arc of less than 90 degrees to provide changes in the light transmitting functionality of the superposed elements; each of said elements having a light transmittance of from about 42 to 44 percent.

Abstract: Dispersions of spherical particles of organic materials are obtained by continuously precipitating the organic material from solution in a volatile water miscible solvent which contains at least ten percent by weight water, by adding water containing a dispersing agent. Solvent is rapidly removed before recrystallization can take place thereby allowing the precipitated particles to be recovered in a spherical habit rather than in the normal crystal habit for the material.

Abstract: Microscopic capsules comprising a nucleus surrounded by a film-forming polymeric layer having a substantially continuous light-reflecting metallic coating thereover.

Abstract: The velocity of a free falling coating composition stream emitted from a coating applicator is altered prior to reaching a web by streams of gas directed over air foils situated immediately adjacent said coating composition stream.

Abstract: A window construction adapted to permit or prevent light transmission including first and second fixed polarizer panels and a moveable panel between the polarizer panels comprising a polarizer and a wave retarder. The first fixed polarizer panel comprises adjacent polarizers which are in the same plane and have their absorption axes perpendicular to each other. The absorption axes of the polarizer panels are positioned so that maximum or minimum light transmission through the construction is effected by moving the panel including the wave retarder between the fixed polarizer panels.

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. The fixed pair of elements is retained by a frame member having an arcuate peripheral portion which engages a rotatable light polarizing element biasing means which is fixedly attached to each rotatable light polarizing element and prevents substantial axial movement of the rotatable light polarizing element.

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 photographic film unit comprising superposed photosensitive and image-viewing elements including an area adapted to be exposed and processed by an aqueous alkaline processing composition spread in a layer between the two elements to facilitate formation of a transfer image. A trap for excess processing compositon is affixed to one end of the unit and the entire assemblage is secured together by a binding element which is secured around and to at least three edges of the film unit including the edge to which is affixed the trap. The binding element comprises foldable tabs on both sides of the trap area and, when the element is folded to provide binding functionality, the tabs are located slightly inboard of the trap whereby the thickness of the film unit in the area of a tab is increased by the thickness of the tab.

Abstract: A continuous web of identical plastic parts is produced by molding a first unit comprising at least one of such parts in a mold, and connecting such molded part(s) to subsequent molded parts, by means of at least one runner upon which all the parts comprising the web are molded. The runner(s) connecting the parts may include indicia of data such as, indexing, information, part treatment information, assembly information, inventory information, etc.

Abstract: Apparatus for interfacing a battery powered photographic camera with a battery containing film cassette is disclosed. When the cassette is interfaced with the camera, electrical contacts in the camera engage the terminals of the cassette battery through access ports in the cassette housing. These access ports are provided with removable battery terminal masks to prevent accidental completion of an electrical circuit. The camera is equipped with enclosure means for receiving the cassette and with means associated therewith for removing the battery terminal masks so as to expose the terminals which can then engage the camera contacts for completion of an electrical circuit.

Abstract: Coating apparatus for depositing multiple layers of superposed coating compositions onto the surface of a moving web which is substantially flat in the region of application of the coating compositions and wherein the web maintains a substantially gapless relationship to the apparatus.

Abstract: A developed and fixed unwashed negative component of a diffusion transfer photographic film unit is protected and preserved for an extended period.

Abstract: A composite light-polarizing lens comprising a light-polarizing element having coated on each surface thereof a layer which enhances adhesion between in situ formed lens components and inhibits migration of lens constituents between said light-polarizing elements and said in situ polymerized components during formation of said lens.

Abstract: A method of fabricating a succession of photographic diffussion transfer film units, each including photosensitive and second sheets secured in face-to-face relation; a container of processing composition; and means for collecting and retaining excess processing composition. In the fabrication method a succession of photosensitive elements are adhered in superposed position with a second element to form a sandwich -- such adherence to be accomplished without the employment of external transverse binders or tapes. Other components of the film units, including containers, processing composition trapping elements and associated components are preferably mounted along lateral and/or transverse portions of the structure with subsequent transverse severance of the composite units each from the other to form individual film units.