The power line comprises a conducting section enclosed in an electrically insulating casing open on one side. The section and the casing are hung by claws. At least one claw is designed to block the conducting section and the casing. Expansion joints are designed at some intervals, and end elements prevent any access to the conducting section which is electrically supplied by junction units included in the end elements connecting two adjacent segments.

By using air speed as an input to a ground proximity warning system that includes: a signal representative of the time rate of change of the aircraft altitude with respect to ground; circuitry for limiting the amplitude of this signal; a signal that represents a time rate of change of the aircraft's barometric altitude; and circuitry for combining the amplitude limited signal, representing the time rate of change of the aircraft with respect to ground, with a signal that represents the aircraft'...

A railroad-highway grade-crossing warning system is accomplished by control circuitry for synchronizing the flash rates of incandescent and xenon lamps so as to produce a continuously uniform signal pattern which can be rapidly identified and understood by a motorist.

A catamaran watercraft having a pair of parallel pontoons which pivot along their respective longitudinal axes. The pontoons are each preferably triangular in cross section, having a planar bottom surface and a linear top surface forming the longitudinal axis of rotation. A deck is hingedly supported by the linear top surface of each pontoon so as to be pivotable about the longitudinal axis of the pontoon. A control bar member or control wheel is included for simultaneously pivoting the pontoons...

A skid control system utilizing a skid detector which is responsive to wheel deceleration, a skid recovery detector which is responsive to wheel acceleration, a holding circuit including a capacitor for modifying the response of the system in accordance with the level of charge on the capacitor, and charging and discharging circuits for charging and discharging the capacitor in accordance with various skid condition related signals.

A railroad car maximum speed limiting device including a railroad car wheel-driven generator and centrifugal speed responsive switch for operating a solenoid valve to supply vacuum to the vehicle brakes from an auxiliary vacuum reservoir after the vehicle has passed a magnetic trip operating a relay to complete the genertor circuit, the improvement comprising an air cylinder operated by trainline vacuum for moving the generator and centrifugal speed responsive switch wheel out of engagement with...

A two piece brake disc includes an outer ring shaped member and an inner ring shaped member disposed concentrically within and joined to the outer member. One of the members comprises a structural member for mounting the disc with the other member comprising a wear member having one or more frictional surfaces and being replaceable because of the two piece construction. The members are essentially all-carbon composites which may differ chemically from one another such as through use of additives...

In an aircraft terrain warning system utilizing a radar altimeter wherein the rate of closure to the terrain is compared with the aircraft's altitude above the terrain to generate a warning signal when the closure rate is excessive for a particular altitude, the closure rate signal is limited and biased depending upon the aircraft's closure rate and configuration in order to significantly increase the time response of the system while at the same time reducing nuisance warnings. The amplitude li...

An anchor provided with a shank which is pivotally connected to a hollow fluke construction near the center of gravity of the fluke construction, characterized in that the fluke construction is formed as a peripherally closed, substantially delta-shaped blade having a forwardly converging hydrofoil section with a forwardly and downwardly bending configuration terminating in a sharp front edge, and a truncated rear portion, and having a central opening for receiving the shank.

A device for hanging a bicycle in an inverted position beneath the wing of an aircraft characterized by a mounting structure attached to the wing and supporting a pair of spaced brackets which receive and entrap the wheels of the bicycle. The mounting structure includes a pivot connecton so that the bicycle may swing through a limited arc in a directon perpendicular to the direction of movement of the airplane during flight.