Abstract: A hand-held portable transducer simulator unit connects to a vehicle's instrumentation circuitry in substitution of the vehicle's own pressure and/or temperature transducers for diagnostic checking of the instrumentation circuitry. Various sets of adapter cables are available for use to connect the unit to the instrumentation circuitry depending upon the particular model and accessories involved. The unit simulates both pressure and temperature transducers and contains various resistor loads which are selectively presented to the instrumentation circuitry through use of a rotary selector switch on the face of the unit to simulate transducer response to various conditions. The information presented on the vehicle's instrumentation display is monitored for correspondence to the simulated conditions selected by the selector switch.

Abstract: A lubricant applicator including a container having an outlet to be connected to the lubricating system of a bearing, a separator in the container movable to force lubricant out through said outlet, a gas chamber behind the separator and in communication with the container, a cathode and an anode in the chamber and forming part of an electrical circuit, a switch for breaking and making the circuit, and an electrolyte in contact with the anode and cathode for generating gas when electrical current flows through the circuit, the generated gas applying pressure to the separator to force lubricant out through the outlet.