Abstract: Saftey jumper cable apparatus includes first and second cables, first and second connectors for connection of the cables to the rescue vehicle, third and fourth connectors for connection of the cables to the disabled vehicle and circuitry which prevents reverse or cross connection of the cables or shorting of the connectors.

Abstract: A portable power pack for starting and operating automotive engines includes a transformer having a primary winding provided with wires to be plugged into a standard 110 volt 60 hertz electrical supply and a center-tapped secondary winding connected to a pair of silicon controlled half wave rectifiers to provide a direct current output at approximately 16 volts. A remotely operable trigger or gate circuit is provided to cause the silicon controlled rectifiers to fire only at the time it is desired that electrical power be fed to the automotive engine which is to be started or operated. With the exception of the electrical leads from the standard source of alternating current, to the automotive engine, and to the point of remote operation of the trigger circuit, the entire power pack is potted in a solid, thermally stable, thermally conductive material to rapidly dissipate the heat generated within the potted electrical elements of the power pack when it is delivering electrical power to an automotive engine.