Abstract: A method of training an operator in the use of first detection apparatus responsive to a first sensible emission of a hazardous nature, e.g. radio-active or ionizing radiations or toxic gases or vapors from war gases or nerve gases, and involves training the operator in the use of an alternative second detection apparatus responsive to a second sensible emission of a non-hazardous nature. For use in such a training method, there is provided, in combination, a self-contained movable supply of chemical, e.g. gaseous, material that in use provides a second sensible emission, and a detector responsive to the second sensible emissions and providing an indication commensurate with the level of those emissions, the indication being provided in units of the said first sensible emission. The self-contained movable supply may include one or more of: activated carbon, or silica gel, or a molecular sieve, or a nut or bolt, or a particulate material (e.g.

Abstract: A refrigerant heating and cooling system for a motor vehicle includes an inside coil, an outside coil, expansion valves, a reversing valve, a refrigerant compressor, a chiller and a control device. The compressor, outside coil, an expansion valve and the inside coil define a first circuit for cooling the air within the vehicle. The compressor, inside coil, an expansion valve and the chiller define a second circuit for heating the interior of the vehicle. The chiller is a refrigerant-to-engine coolant heat exchanger. When in the heating mode, the chiller functions as an evaporator, the inside coil functions as a condenser and the engine coolant system is the heat source. The control device varies the flow of the engine coolant through the chiller as a function of the engine coolant temperature in order to maintain a relatively constant set temperature within the vehicle.

Abstract: The specification discloses a vehicle cabin temperature control including a thermostat and a power circuit responsive thereto for selectively applying electrical power to a heating/cooling device. The control further includes a protection circuit coupled to the power circuit for interrupting the power applied to the heating/cooling device when a short-circuit is detected.