Abstract: A high spatial and dynamic resolution color image recording system and method for computer generated displays includes a low cost personal computer having a low resolution display monitor adapter and a photographic image recorder coupled to receive low resolution fields of a video image in intensity dependent time varying steps to produce a high resolution composite image. Spatial resolution is improved by providing a separate image for each primary color component as a plurality of interlaced fields. High dynamic resolution is attached for each field by generating each field on a single intensity monochrome raster scan display and exposing the image of a field through a primary color filter in a plurality of intensity dependent steps with the total exposure time for each different color intensity being proportional to the intensity thereof. A gamma compensation is utilized to compensate for the particular optical characteristics of the display, filter and photographic film.

Abstract: In a seed meter in which a seed disk having a circular outer edge is rotatably mounted on a hub within a generally cylindrical housing, an elongated cleanout and seed sealing member mounted within the housing adjacent a substantial portion of the circumference of the outer edge of the seed disk forms a generally uniform space or gap with the outer edge of the seed disk which is large enough to pass most seed chips, broken seeds, dirt and other debris therethrough but small enough to prevent seeds contained within the housing and adjacent the seed disk from escaping therethrough. The cleanout and seed sealing member has a sloped surface adjacent the outer edge of the seed disk which provides the space or gap with a size that increases with increasing distance from the axis of rotation of the seed disk to facilitate the escape of debris.

Abstract: High tensile carbon fibers are provided with a high yield process in which, after oxidation of a precursor, the fibers are first precarbonized in an inert atmosphere to to about 600.degree. C. while imparting 5-10% stretch. In precarbonizing, the fibers are initially heated in a sweeping manner with substantial volumes of hot inert gas which is extracted along with products of decomposition before the fibers are cooled to a low, non-reactive exit temperature. The arrangement minimizes redeposition of tars on the fibers and stretches the fibers in a range in which substantial off-gassing occurs. Thereafter the fibers are finally carbonized at a higher temperature with a different tension being applied, to provide a more reliable less sensitive process that enables oxidation to be effected more rapidly.

Abstract: Skin treating composition comprising about 3 to about 7 parts salicylic acid, about 8 to 12 parts resorcinol, about 8 to about 12 parts lactic acid, and about 60 to about 90 parts ethyl alcohol, by weight. The composition is applied to the face, and after approximately a week, causes light peeling of dead surface skin together with removal at least some blemishes, imparting a youthful and healthy complexion.

Abstract: An automatically engageable and disengageable drive coupler mechanism is provided in which separate drive and driven couplers are automatically coupled to and uncoupled from each other simply by moving the couplers into and out of contact with each other in a radial direction or an axial direction or a combination thereof. The driven coupler includes a lug arrangement rotatably mounted on a mounting member at the end of a driven shaft and having a pair of driven lugs on opposite sides of the driven shaft which are rotatable about an axis intersecting and normal to the axis of elongation of the driven shaft. A leaf spring coupled to the mounting member resiliently biases the lug arrangement into a neutral position in which the lugs extend outwardly in the direction of the axis of elongation of the driven shaft while at the same time permitting rotation of the driven lugs out of the neutral position in either of opposite directions against the resistance of the spring.

Abstract: In a seed meter in which a pressure differential is utilized in conjunction with a rotating seed disk having a circumferential row of seed cells therein to pick up individual seeds from a seed mass and deliver the seeds to a seed discharge area, the seed cells are uniquely configured for use with seeds such as sunflower seeds which are of relatively long and slender configuration and of relatively low mass. Each seed cell includes a teardrop shaped recess in the side surface of the disk having an aperture extending through the disk from the bottom thereof to communicate the pressure differential to a seed held within the recess. The seed cell includes a projection extending outwardly from the side surface of the disk and having a surface generally continuous with the back wall of the seed cell so as to aid in picking up and retaining a seed within the recess in addition to providing agitation of the seed mass prior to pickup of the seed.

Abstract: A method is provided for splicing carbonized PAN tows in which the tows to be spliced are cut square and coated at the ends thereof with a resin solution, following which the coated ends are joined together, heated so as to cure the resin solution and then pinched to compact the resulting splice. The resin solution is comprised of a mixture of a solid acrylic polymer, a liquid acrylic polymer, a solid epoxy resin and a solvent.

Abstract: A method and apparatus for providing apertured elements such as reinforcing rings having precisely defined edges without tearing or distortion operates on an elongated strip of first and second sheet material held together by a detachable adhesive. Both perimeters of the desired apertured element are first cut in one sheet of the strip without cutting the other sheet. A second shape, within the inner perimeter of the apertured shape, is cut into the second sheet without cutting into the first sheet, either before or after the cuts in the opposite side. This leaves material within the apertured shape that is held in place by a border due to the adhesive backing. After first sheet material outside the apertured shape is separated from the second sheet, a mechanism is used to overcome the adhesive force at the border and remove the inner cuts simultaneously. Thus only the desired apertured elements are left on the second sheet to be removed for use either at that time or thereafter.

Abstract: A high accuracy selectable gain instrumentation amplifier system which avoids amplifying signal distortions produced by gain selection switches includes a high gain amplifier having an input coupled to receive a system input signal and a feedback signal and an output generating an output signal proportional to the difference therebetween, a feedback network providing a plurality of gain selection feedback paths to the amplifier input, a first switching network coupling the amplifier output to a selected feedback path and a second switching network coupling the selected feedback path to the system output. The amplifier system may be implemented in either a differential or single ended ground referenced configuration.

Abstract: Low signal attenuation optical fibers and methods for making such fibers mimimize the internal and interface defects while providing high throughput by radial deposition of successive particulate layers about a small diameter start element and co-vitrification of the layers followed by drawing to the small final diameter that is desired. Radial vapor deposition of an interface layer on the start element, followed by an encompassing core and then a cladding provides boundaries that form transitional continuums after the structure has been vitrified. The start element remains as part of the core but is so small as to have no discernible effect on light propagation, and the number of interfaces in the light propagating portion is limited by maintaining the ratio of the cladding thickness to the core radius to less than 1.5 in the initial preform. By drawing this preform to form separate rods, additional cladding is applied to form a fiber preform from which optical fibers may be drawn.

Abstract: A coherent frequency, velocity responsive electronic surveillance system detects the motion of a transponder relative to two receiving antennas on opposite ends of a surveillance zone positioned at the exit of a retail store. Motion in opposite directions relative to the two antennas indicates that the transponder is within the surveillance zone. As a means of reducing false alarms, motion of a transponder proximate to, but outside the zone is distinguished from motion inside the zone because motion outside the zone is in the same direction relative to both antennas. False alarms are reduced even further by requiring detection of motion through a selected distance before indicating an alarm.

Abstract: A module readily assembled roofing system for overlying a base structure, e.g. of a house or building, comprising a plurality of elongated modules of identical cross-section, each support including a principal body member defining a planar upper surface for the support and means defining a guideway or keyway aperture accessible from the undersurface of the support. The support also includes a planar web member extending from the principal body member and a locking member engaged to the free edge of the web member, including a terminal bead at the upper end of the locking member. The locking member mates with the guideway within an adjacent module such that one module is slideably received in mating relation within the guideway of an adjacent module to lock adjacent supports against vertical displacement. The web members are coupled to the base structure as by rivets, and a plurality of overlying covering members are affixed to the top surface of the body members.

Abstract: A refrigeration unit (10) includes a temperature control circuit (42) in which a plurality of coils (32) are wrapped around associated compressors (24, 26, 28, 30, 38 and 40) and are arranged in parallel between a supply manifold (44) and a return manifold (46) so that as long as one of the compressors is operating, heat will be transferred into a working fluid flowing through the coils in order to heat any non-operating ones of the compressors. Further, during warm weather, any excess heat can be dissipated from the working fluid to a suitable heat sink as by use of a heat exchanger or any appropriate heat reclaiming process. In extremely cold environments, heat can be added to the working fluid in a suitable manner to maintain the fluid above a predetermined minimum level necessary to assure proper functioning of the compressors.

Abstract: A time limited coherent frequency doppler radar system monitors a precisely bounded merchandise detection zone for motion of a transducer therein. False alarms are reduced without limiting sensitivity by limiting the maximum radar signal propogation times to control the outer boundaries of the detection region and by requiring a selected minimum motion within the detection zone. An even more precisely bounded merchandise surveillance zone can be realized by using two spaced-apart radar systems having overlapping detection zones.

Abstract: A capacitive pressure transducer is comprised of a deflectable diaphragm and a substantially planar reference plate, both preferably molded of ceramic. The diaphragm includes a sensor electrode ring disposed about a central region thereof and a concentric reference electrode ring substantially encompassing the sensor electrode, with a guard ring between the electrodes to electrically isolate the reference electrode from the sensor electrode. The reference plate is disposed in facing relation to the deformable flat surface of the diaphragm and includes a sensor electrode ring disposed and in opposition to the sensor electrode on the diaphragm to form a sensing capacitor therewith. Spacer means disposed in the central region between the diaphragm and the reference plate intercouple the two elements and maintain a substantially fixed dimension in the central region therebetween while permitting deformation of the diaphragm in response to pressure variations.

Abstract: A mechanism is disclosed for latching the read/write heads of a magnetic disk memory in a parking zone. The mechanism permits the heads to operate in the read/write mode within small distances of the parking zone and requires no additional electrical power. The mechanism includes a spring pawl cantilevered from the head/arm assembly and a latch plate pivotally mounted on the disk memory housing. In the latched condition of the head/arm assembly, the tip of the pawl engages a small abutment surface on the latch plate which is spring biased to arrest the motion of the assembly. Unlatching is effected by actuating the head/arm assembly to overcome the bias of the latch plate spring.