Abstract: An antenna attachment device and method that can attach to a vertical or angled structural member such as, for example, a vertical or an angled antenna tower leg, and that can support a mounting pipe at a desired angle such as, for example, in a vertical position.

Abstract: An assembly and method for connecting a anti-rotation arm of an antenna structure to a support structure such as an antenna tower member accommodates angular differences between the anti rotation rod and the tower member, and accommodates attachment to various types of anti rotation rods, and/or various cross sectional types of tower members.

Abstract: An antenna attachment device and method that can attach to a vertical or angled structural member such as, for example, a vertical or an angled antenna tower leg, and that can support a mounting pipe at a desired angle such as, for example, in a vertical position.

Abstract: A method and apparatus are provided for passive direction finding that demines the sideband and angle of arrival of an incoming radio signal. A four-channel superheterodyne receiver generates quadrature between the radio signals received by each channel. Four inphase/quadrature phase detectors are connected to the receiver for generating inphase and quadrature components of the electrical phase differences between antenna elements of the receiver. The inphase and quadrature components are used for sideband determination and the electrical phase differences are used to derive the angle of arrival.

Abstract: A mechanical drive system for driving a syringe, or other fluid infusion system, over extended period of times, which drive system also provides manual advance and quick release features. Manual advance and quick release is selectively provided by mechanically decoupling the gear train from the syringe drive mechanism.

Abstract: A method and device for adjusting the center frequency after fabrication of surface acoustic wave (SAW) devices by the deposition of a nonconducting coating which alters the SAW propagation velocity of the device.

Abstract: An apparatus for sealing a pressurized vessel comprising a hemispherical ped door with an outer rigid surface, an insulating material, an inner rigid material with a flange affixed thereto, and a supporting member for use in combination with lock and hinge mechanisms, the flange on the door cooperating with an inflatable seal that is seated within a groove positioned on the inside surface of the mouth of the vessel.

Abstract: A method of producing an optical reticle and the reticle produced thereby. thin layer of aluminum is deposited on the face of a sapphire substrate and a reticle pattern is chemically etched therein. The system is then exposed to air at an elevated temperature for approximately one hour to oxidize the remaining aluminum layer. A film of titanium is next placed over the rough aluminum oxide as by sputtering, for example, and the excess titanium is etched away by the same pattern to produce the finished reticle.

Abstract: A method of producing an optical reticle and the reticle produced thereby. thin layer of aluminum is deposited on the face of a sapphire substrate and a reticle pattern is chemically etched therein. The system is then exposed to air at an elevated temperature for approximately one hour to oxidize the remaining aluminum layer. A film of titanium is next placed over the rough aluminum oxide as by sputtering, for example, and the excess titanium is etched away by the same pattern to produce the finished reticle.