Abstract: An identification label for permanently marking a metal or other etchable surface such as an automobile part with an identifying indicia is disclosed. The label has a protective cover sheet, a pressure sensitive adhesive irremovably affixed to the cover sheet, and a liner with a release coating removably affixed to the adhesive. An identifying indicia comprising an etchant in a visible vehicle such as a printing ink is printed on the adhesive at the interface of the removable liner and the adhesive so that when the liner is removed, the remaining portions of the label may be adhesively attached to the metal surface with the etchant of the identifying indicia in etching contact therewith. The identifying indicia will thus be etched into the surface of the part for a permanent marking of the part.

Abstract: A water-based adhesive composition includes a water based acrylic adhesive emulsion and a tackifier. The adhesive has about 70 percent by weight of solids before drying. There is also provided a method for making an adhesive coated substrate which includes blending a water based acrylic adhesive emulsion with the tackifier to provide an aqueous composition which has above about 70 percent by weight of solids and above about 20 percent by weight of water. The composition is extruded onto a substrate moving at high speed and is cured.

Abstract: An integrated multi-band and multi-polarization antenna array comprising: a plurality of first waveguides located in spaced parallel relationship, the waveguides being dimensioned so as to carry signals of a first wavelength, the waveguides containing slots in a first surface so as to radiate the signals carried by the first waveguides with horizontal polarization, a plurality of second waveguides located in spaced parallel relationship to each other and to the first waveguides, and bridging and abutting the first waveguides adjacent a second surface opposite the first surface, the second waveguides being dimensioned to carry signals of the first wavelength, the second waveguides containing slots in a surface parallel to the first surface so as to radiate signals carried by the second waveguides with vertical polarization, a third waveguide located in spaced parallel relationship to the first and second waveguides, dimensioned to carry signals of a second wavelength, and containing slots in a surface parallel

Abstract: A method of determining the existence of a target light source comprising progressively receiving successive pixel intensity values row by row and column by column of a scanned array of a light detector, comparing each pixel intensity value as it is received with upper and lower thresholds, declaring successive rows of pixels as dark, bright, edge or null depending on whether each row of the intensity values above, between and below the thresholds meets predetermined criteria, declaring a light source as detected in the event an array of pixels exceeding the lower threshold are completely surrounded by pixels which are of lower intensity than the lower threshold, and storing a signal indicating detection of a light source in a memory with a location identifying an address of the array in which the light source was declared as detected.

Abstract: A deployable antenna system comprised of a pair of independently flexible membranes carrying elements of the antenna system, apparatus fixed to corresponding extremity locations of the membranes for stretching the membranes taught and flat, spacers rigidly fixed to corresponding facing locations on the membranes, the locations being selected such that a line passing through each of the spacers is orthogonal to the surface of the membranes when the membranes are stretched, and at another angle to the surface when the membranes are either relaxed or one membrane is shifted laterally to the other.

Abstract: A capacitive pressure transducer comprising a first capacitor having a plate which is movable under the influence of pressure and a fixed plate, and a second capacitor having a pair of fixed plates, one plate of the second capacitor and the fixed plate of the first capacitor being fixed to a common support, a first structure for moving the movable plate, a support structure for a second plate of the second capacitor, masses of the support structure for the second plate and of the first structure for moving the movable plate being approximately equal.

Abstract: Pressure-sensitive adhesive-backed substances, such as printed labels, are produced on a release-coated carrier sheet with the printed label indicia sandwiched between the pressure-sensitive adhesive layer and an overlying protecting, preferably transparent, thermoplastic layer. The process for producing the adhesive backed substrate features the extrusion of a water-based, pressure-sensitive acrylic adhesive layer onto the substrate in as near a dry state as possible without heat. Additionally in the label-making process, the overlying thermoplastic layer also may be extruded. The extruded pressure-sensitive water-based acrylic adhesive preferably has a water content of on the order of about 10% by weight, which is just sufficient to permit the extrusion of the adhesive, so that minimal drying is required prior to subsequent processing steps such printing on the adhesive, in the case of the label-making process.

Abstract: A helical antenna comprised of a helical conductor having one end adapted to be connected to a feedline, a conductive surface contained within but spaced from the helical conductor, the distance of the conductive surface from the helical conductor being predetermined so as to vary the radiation loss from the helical conductor during electromagnetic emission therefrom.

Abstract: An antenna radiator comprising a rectangular conductive cap disposed over a top of a dielectric, the cap having an extension over a side of the dielectric, apparatus for feeding energy to the radiator adjacent an end of the extension remote from the cap, and a ground plane spaced from and parallel to the cap, below the dielectric.

Abstract: An antenna pointing mechanism for a highly directional antenna which avoids the aforenoted problems. The mechanism including the antenna are rendered substantially immune to bending and play-induced movements resulting from vibration or the like, making it highly useful for land based vehicles, ships, and particularly for aircraft. It also provides the ability to point the antenna over elevational angles exceeding 180.degree., making it particularly useful for communication with satellites from aircraft.

Abstract: An identification label for permanently marking a metal or other etchable surface such as an automobile part with an identifying indicia is disclosed. The label has a protective cover sheet, a pressure sensitive adhesive irremovably affixed to the cover sheet, and a liner with a release coating removably affixed to the adhesive. An identifying indicia comprising an etchant in a visible vehicle such as a printing ink is printed on the adhesive at the interface of the removable liner and the adhesive so that when the liner is removed, the remaining portions of the label may be adhesively attached to the metal surface with the etchant of the identifying indicia in etching contact therewith. The identifying indicia will thus be etched into the surface of the part for a permanent marking of the part.

Abstract: A device is provided for use in a helical antenna having an antenna element wound about the periphery of a dielectric support post, the post being in the form of a tube or cylinder. The device has an electrically conductive member electrically connected to one end of said antenna element. The conductive member is of any appropriate shape or configuration and is operable to increase the loading on the antenna whereby standing waves on the antenna element are reduced and a more uniform electrical current is produced along the antenna element.

Abstract: A method and device for temporarily supporting advertising pieces or the like on a vertical surface. The device includes a flexible backing band having a pair of spaced, parallel permanent magnet strips secured thereto. The magnet strips are of opposite polarity and arranged to clamp an advertising piece therebetween when the flexible band is folded over to position the magnets in an aligned facing orientation. A pressure sensitive adhesive layer is provided on the flexible band to affix the device to a suitable vertical surface to display the advertising piece.

Abstract: An aerodynamic dart toy for amusement of children and adults includes a dart body having a blunt magnetic nose and a lightweight aerodynamic body formed in one piece by selective folding of a die cut flat sheet material. The device can be manually propelled over a significant distance to strike a metal target and attach itself thereto.