Abstract: A marine radar system having a constant brightness display presentation upon all range settings and with independent switched power supplies for both the MTR and indicator units. The switching frequencies of the power supplies are independent from each other and those of the data clocks and PRF with the switching frequencies of the power supplies being intermediate those of the data clocks and PRF. Means is provided for switching the bandwidth of the system in accordance with the range setting. A digital STC circuit and a North stabilization device are also provided.

Abstract: A semiconductor integrated circuit device of the beam lead type having a semiconductor interconnection substrate with apertures for integrated circuit chips therein and with metallization patterns having sharply pointed ends for penetrating oxide layers over the bonding pads of the chips and for making electrical connection thereto. Devices thus produced may be assembled and tested and failed chips replaced as necessary before the chips are ultrasonically welded to the interconnection metallization and before final fabrication of the device. The invention also includes a method for producing an interconnection substrate in which a plurality of conically shaped holes are etched into a semiconductor wafer having sharp points within the body of the wafer. A metal layer is deposited over the surface of the semiconductor wafer filling the etched holes. Sharp points are thus formed on the metal in the etched holes.

Abstract: The invention disclosed herein relates to a body of substantially pure isotropic boron nitride in which individual anisotropic crystals of boron nitride are substantially randomly oriented and pyrolytically bonded to form a body having substantially improved electrical and mechanical properties compared with anisotropic boron nitride bodies in which individual boron nitride crystals are hot press bonded.

Abstract: A process of forming a composite semiconductor integrated circuit by forming one or more epitaxial layers of semiconductor material on a semiconductor substrate, forming pedestals by etching partially through said epitaxial layers to form regions projecting from said substrate and etching through said epitaxial layers to form stress relieving channels in the substrate surrounding the pedestals. A thick layer of easily removable material such as an evaporated layer of chromium plus gold and a plated layer of gold is deposited of sufficient thickness to provide good mechanical support, and the substrate is removed by lapping, grinding or etching until at least the stress relieving channels are exposed thereby forming separate semiconductor elements containing said epitaxial regions.

Abstract: A high voltage power supply system particularly adapted for rapid switching of high voltage applied to an anode of a beam penetration color cathode-ray tube. Energy for making the rapid transition between voltage levels is stored in two energy storage inductors, one for upward transitions and the other for downward transitions. When it is desired to change the voltage applied to the cathode-ray tube, the appropriate one of the storage inductors is coupled through a controlled switch to the anode causing the voltage applied to the anode to change at a rapid rate. The voltage rises until the desired voltage level corresponding to a desired output color is reached at which time the switch is turned off and the storage inductor recharged. A tracking high voltage supply maintains the anode at the predetermined voltage level once that level has been reached.

Abstract: A radio beacon navigation system wherein buoys placed at predetermined locations in a harbor or channel transmit identification signals. Every buoy is assigned a unique carrier frequency upon which is transmitted a signal capable of identifying the buoy. Each buoy is shown on harbor charts according to the unique properties of its signal. Radio receiving means carried aboard vessels navigating through the harbor or channel include means for determining the identity of the buoy from which signals are received and the direction from which the received signals emanate.

Abstract: A material collecting device such as a hopper, shredder, or enclosed conveyor having an entrance opening for deposit of material into the device, an exit opening for removal of material, and a hood on the device connected with duct means for exhaust of dust particles from the material, the hood being provided with a circumferential passage through which air is drawn into the device for entraining such dust particles, and with coils or rings for removing moisture from the air, the coils being connected with a source of hot fluid or refrigerant for drying the material and/or the air within the device, and being Coanda-shaped if desired for extraction of water from a moving air stream.

Abstract: A method of storing electric charges in a metal-nitride-oxide-semiconductor memory element by setting the threshold voltage of the element at any of a substantial number of voltages by applying both a DC voltage corresponding to the analog voltage to be stored and an AC voltage which is gradually reduced.

Abstract: A novel anode structure for electron discharge devices, for example, a crossed field oscillator of the magnetron type is fabricated by uniting nonthermally substantially similar cylindrical members each having a boundary wall member and plurality of vane members. The vane member edges are provided with alternate clearance or contacting mating notches to position an annular strap or straps in the complete anode assembly. Less expensive metal castings, such as aluminum, and other suitable vacuum materials, and such techniques as pressure welding and interference fits may be employed without expensive brazing procedures to result in a simplified less expensive anode structure. Different anode vane configurations are simply implemented, such as V-shapes, utilizing castings or similar structures which when joined together form the composite anode assembly.

Abstract: An air seal having a flexible annular seal which fits around a cylindrical rotatable member and a flexible marginal portion which slidably interfits within an opening into a substantially closed chamber whereby both rotation and pivotal movement of the member is permitted without allowing flow of an substantial amount of air between the member and chamber.

Abstract: An energy seal for microwave oven apparatus having a first energy responsive structure disposed adjacent to a first energy propagation path commencing at the peripheral gap between the oven access opening and door assembly walls. A second structure responsive to the oven operating frequency is disposed adjacent to the output end of a second energy propagation path communicating with said first path. In one embodiment a conductive frame trim member forms a second choke-type structure together with underlying door assembly components of a nonconductive plastic material. The energy seal structures may also incorporate a slotted wall arrangement of the type disclosed in U.S. Pat. No. 3,767,884 to Osepchuk et al, issued Oct. 23, 1973.

Abstract: A plasma panel display device wherein a plasma forming gas is encapsulated in clear glass spheres which are sandwiched between two glass or plastic panels having transparent electrodes thereon. In some embodiments, the type of gas filling some of the spheres is varied to provide a multicolor display panel. A method for filling the small glass spheres with the preferred gas is also described.

Abstract: A process of forming a composite semiconductor integrated circuit by forming one or more epitaxial layers of semiconductor material on a semiconductor substrate, forming pedestals by etching partially through said epitaxial layers to form regions projecting from said substrate and etching through said epitaxial layers to form stress relieving channels in the substrate surrounding the pedestals. A thick layer of easily removable material such as an evaporated layer of chromium plus gold and a plated layer of gold is deposited of sufficient thickness to provide good mechanical support, and the substrate is removed by lapping, grinding or etching until at least the stress relieving channels are exposed thereby forming separate semiconductor elements containing said epitaxial regions.

Abstract: A microwave semiconductor amplifier or oscillator system in which a semiconductor device has an avalanching region at a junction and a heat sink having a higher thermal conductivity than said avalanching region in close thermal contact with the said junction. The avalanching region has a width substantially less than ten times the thickness of said avalanching region but a length substantially greater than said width. The heat sink is made substantially wider than that of the avalanching region so that heat generated in the avalanching region during operation of the system and moving into the heat sink will have a substantial component thereof moving parallel to the junction, thereby decreasing the thermal resistance between the heat source and the heat sink and hence permitting an increased power output from the system.

Abstract: A differentially adaptive receiver system in which correction is provided for degradation of performance caused by overlapping of adjacent data pulses. A reference signal is produced having the same complex envelope as the received signals and having a constant phase state independent of changes of phase state of the received signals. The received signals are detected against the reference signal as in an ideal matched filter receiver. The detected signals are integrated by an integrate and dump filter over the duration of the pulse period. A correction signal representing the amount of overlap between overlapping adjacent pulses is summed with the output of the integrated dump filter. The sum of the correction signal and integrate and dump filter output is sampled and held by sample and hold circuit to produce the digital data output.

Abstract: A fusing technique whereby a fuse is fabricated upon a substrate by integrated circuit techniques. Three or more layers of chemically dissimilar metals are depositedupon the region where the fuse is to be formed. The top layers are then etched away from the region where the fusible link is to be formed leaving the lower two layers, the top one of which forms the actual fusible link. The lower layer is then etched away leaving the fusible link suspended from the underlying substrate. The current necessary to cause such a fuse to blow is consistent from fuse to fuse since the physical dimensions of the fusible link can accurately be controlled with the integrated circuit techniques used and, since the fusible link is not in contact with the substrate, the rate at which heat is conducted away from the fusible link cannot vary from fuse to fuse.