Abstract: A frame assembly comprises a rigid inner frame having a first perimeter; a plurality of independent outer frame members positioned outwardly of the inner frame to define a second perimeter larger than the first perimeter, the second perimeter defining a plane having a front face and a rear face; and a flexible sheet extending across the front face, around the outer frame members and secured in a fixed position on the rear face to define a plurality of longitudinally extending passageways adjacent the second perimeter, the outer frame members positioned in the passageways.

Abstract: A flat phased array antenna for reception of circularly polarized high frequency signals. The flat antenna array consists of a number of subarrays arranged in a matrix. In turn, each of the subarrays consist of individual antenna elements arranged in a matrix. In one embodiment, each subarray consists of four layers stacked one on top of the other. The top layer defines an array of miniature reception horns. Secured to the top layer is a second layer which constitutes the short-circuit plate of the antenna array. The short-circuit plate contains a plurality of through holes disposed about the surface of the circuit plate to permit passage of pairs of cylindrically shaped probes. The two remaining layers constitute the first power dividing layer and the second power dividing layer, respectively. Each of the layers includes transmission line waveguides.

Abstract: A projector stacking stand for supporting at least one image projector comprises a frame and at least one mounting platform connected to the frame with ends supporting an image projector. Each mounting platform is connected to the frame for enabling adjustment of the pitch, roll and yaw thereof relative to the frame by means of a gimbal having three discrete pivot axes corresponding to pitch, roll and yaw axes. The gimbal is moved about the pitch and roll axes by two shafts, each mounted on the gimbal for independent rotation with the axis thereof disposed parallel to the pitch axis and a cable for each shaft having at least one turn therearound. Each cable is connected to the frame under tension with a portion above and below the turn around the shaft and each shaft is rotatable to effect vertical movement thereof along its cable, whereby pitch adjustment is obtained by rotating the two shafts simultaneously in the same direction and roll adjustment is obtained by rotating the shafts individually.

Abstract: A lamp changer for use with a slide projector having a projection lens and a removably modular projection lamp unit insertable through an access door opening. The lamp changer has a housing releasably connectable to the projector at the access opening and a lamp holder for holding at least two projection lamps. The lamp holder is mounted in the housing for pivotable movement about a first axis to successively position each lamp in the lamp holder in direct alignment with the projection lens. Movement of the lamp holder is effected when desired and the new lamp is moved into alignment with the lens and is energized.

Abstract: Individual segments of splicing tape are prepared at a splice cutting station from a continuous length of foil-thin, self adhering splicing tape. Each thusly prepared splicing-tape segment is transported by a vacuum pickup over to a splicing station at which a spool of magnetic tape has been positioned with the ends of the magnetic tape temporarily held in abutting relation by a vacuum operated, tape hold-down assembly. The vacuum pickup now moves to deposit the segment of splicing tape onto the abutting ends of the magnetic tape, and thereafter releases the vacuum hold on the splicing segment and returns to the splice cutting station to repeat the foregoing sequence.

Abstract: A system for the intermittent immobilization of motion picture images on a continuously moving film strip passing through a film gate. The image path of the system includes a ring-shaped optical element rotatably driven about its central axis. Rotation of this "optical cam" is synchronized with the continuous feed motion of the film strip through the film gate so as to cause the image to be immobilized for the period of the cam's rotation, after which the cycle is repeated. Three fixed optical elements comprising a film gate corrector, an aperture corrector, and a focal plane corrector are interposed in the image path for compensation of optical aberrations caused by the variation of optical cam scan angle and tangential slope over the intercepted area of the optical aperture, and by the compound "Euler" angle changes with optical cam rotation.

Abstract: A plurality of strands of magnetic recording tape are withdrawn in parallel feed paths from tape supply reels and are fed by a tape feed assembly at a controlled, high speed rate to a takeup assembly and wound thereat on a corresponding plurality of tape cartridge spools, of the endless tape type, that are rotated by a takeup shaft. The takeup shaft is driven at a spooling rate that is faster than the feed rate and each of the spools are drive coupled to the takeup shaft by individual, adjustable slip-clutch hub assemblies which cause the tape strands to be wound at individually adjustable spooling tensions which must be carefully regulated to insure proper operation of the spooled tapes when assembled in the endless tape cartridge. Each of the supply reels holds sufficient tape for filling numerous individual spools and as each set of spools on the takeup shaft becomes full, the strands of tape are cut and the full spools are withdrawn and replaced with empty spools.

Abstract: A motion picture sound reading system employing a light emitting diode source which is modulated at a carrier frequency several times higher than the highest sound-track frequency for exciting the optical sound track and a carrier-demodulation signal processing system for deriving a high-quality audio signal from the photoelectrically detected optical sound track.

Abstract: The improved method of the present invention comprises contacting a clean and preferably etched selected crystalline substrate with a controlled thickness of a melt comprising a saturated solution of selected materials capable of forming semi-conductor junctions, preferably heterojunctions, with the substrate. The contacting is carried out while the resulting melt and substrate sandwich is shielded by a protective atmosphere of gas such as hydrogen and while the sandwich is subjected to a progressively lower temperature gradient maintained across the melt-wafer package.The method and apparatus are particularly applicable to the preparation of improved light-emitting diodes by the liquid epitaxial growth technique.

Abstract: A cold cathode for an image-type tube such as a vidicon. The cathode features a negative electron affinity surface and a field enhanced electron ejection method. The photons generate electron-hole pairs in a compound semi-conductor structure having Group III and Group V compounds to form a heterojunction.

Abstract: A cartridge having a film handling portion and an audio tape cassette storing portion for use with an audio-visual system. The film storing portion includes a supply and take-up reel which are coupled by an intermediate gear so that the rotation of one reel is coupled to the other and means for transporting the film spooled about the reels past an aperture plate in either a continuous or intermittent motion mode. Provision is made in the cartridge for allowing the projection of light through the image portion of the film positioned at the aperture in the aperture plate and through an auxiliary frame in the film positioned at an auxilliary aperture to identify the number of the image portion being projected. A standard audio tape cassette containing the audio portion of the audio-visual presentation associated with the film may be stored in the tape cassette storing portion facing towards the opposite side of the cartridge from the aperture plate.