Abstract: The present invention includes both a system and a method for locating a source of a randomly modulated signals. In one form of the invention at least three receiving stations receive and process the randomly modulated signal. A common reference level is selected at each of the receiving stations. The times of arrival at each receiving station of the selected transitions of the signal with reference to the common reference level are determined. Each of the receiving stations provides an indication of the selected transitions to a center facility for processing to provide an indication of the location of the signal.

Abstract: An aircraft cabin air heater system for a multiengine aircraft having a cabin and a nose duct communicating therewith includes an electric resistance air heater unit positioned in the cabin and provided with air ducts leading from the cabin to the air heater unit and back to the cabin. A fan associated with the air ducts and heater unit recirculates air from the cabin through the air ducts and heater for heating the air. The air ducts are connected to the nose duct and are arranged to permit sufficient outside air to enter the cabin through the nose duct to maintain the oxygen level sufficient for passenger comfort while limiting the amount of outside air to that which will permit the air heater unit to maintain the cabin temperature at a comfortable level. An alternator driven by one of the engines provides electrical power to the air heater unit and serves as an auxiliary back-up electrical power for the aircraft in case the aircraft's main electrical power supply fails.

Abstract: The invention contemplates a single-piece injection-molded plastic hose clamp which may be made, shipped and stored flat and yet which, in assembly to a flexible hose may be applied to squeeze and effectively shut off flow through the hose in a one-handed shut-off operation wherein the shut-off condition is releasably locked. A hinged locking member on one arm of the clamp includes a bracket which, in reaction to the squeezing action to set the clamp, operates as a bellcrank to elevate the locking member to position for automatic resiliently loaded self-latching engagement with a coacting locking member on the other arm of the clamp.

Abstract: A mold for forming a recycled rubber material under high pressure and temperature comprises a female mold member having a rectangular solid exterior and a pyramid cavity extending into the base thereof. A pair of opposed detents or latches are pivotally secured to each end of the female mold member, adjacent to a pair of slots extending into each end. The male mold member comprises a base plate from one side of which extends a pyramid member. To the opposite side a pair of parallel bars is welded, disposed to be received in the slots in the female member. With a charge of recycled rubber material disposed in the female member of the mold, the pyramid portion of the male mold member is placed in the mold cavity, and the two are compressed together by external means, creating very high pressure in the rubber material. The detents are pivotted to engage the bars, locking the mold members together and maintaining the high internal pressure without the external means.