Abstract: A self-charging continuous EOT power supply/battery pack operates from excess air pressure available in a train's air system. An electric generator is driven by compressed air from the locomotive that is transmitted through the air brake system of the train. The generated electricity is input to a circuit card assembly that regulates the output voltage and generator speed. The regulated voltage is supplied to the EOT electronics and also to a storage battery to recharge the storage battery, which provides peak operating power as well as back-up power if the generating system is inoperable.

Abstract: A tool is provided for cutting an outer layer of insulation from an elongated cable or the like. The tool has a cable support or back stop, a knife, a rotatable and adjustable knife holder with a shoulder for contacting and riding over the insulation, and a spring for biasing the holder toward the support. The knife can be positioned to make circumferential and lengthwise cuts through the insulation. An opening may be provided to accommodate a measuring device. A handle may be provided for selectively moving and rotating the knife holder. The handle may be guided by slots in a housing. The knife may be easily positioned in the knife holder and/or replaced.

Abstract: A dynamic shaft seal for bidirectionally sealing fluid flow along a shaft comprising a disc of carbon material positioned between a pair of spaced flat rings mounted for rotation with the shaft. The carbon disc is allowed a range of axial movement forced by a pressure differential across the carbon disc so that the disc can form a contact seal with one or the other of the flat rings. The carbon disc is allowed to float between the flat rings when pressure on opposing sides of the carbon disc are equalized. Means are included to prohibit rotation of the carbon disc with the shaft.