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.