Abstract: A new furnace is provided which employs a forced draft to efficiently and cleanly burn a wide variety of fuels such as wood and refuse. The furnace is designed to internally and continuously pyrolyze (gasify) fuel prior to the burning phase which is conducted in a lower chamber of the furnace where air is admitted at a controlled rate. Combustion temperature is maintained at 1800.degree. F. or higher to completely burn gasified fuel by enclosing the burning zone with refractory material and by not extracting sensible heat from the combustion region until after exhaust gases exit the lower chamber. Ash is produced in a fine powder as a consequence of its being removed from the combustion effluent by gravity and cyclonic (i.e. turbulent) separation.

Abstract: An automatic vehicle monitoring system utilizing a plurality of spaced magnetic fields disposed along a vehicle path. A vehicle mounted sensor produces electrical signals in response to the presence of the magnetic fields. These signals are processed to discriminate against noise and to extract therefrom information concerning the location of the vehicle.

Abstract: The invention is a simplified roller-type apparatus for laminating articles in sheet form with transparent plastic laminating film. It comprises a heating station for heating the work and a pair of pressure rolls for bonding the film to one or both sides of each article. The heating station comprises a pair of vertically opposed flat plates that are separable to permit the work to be inserted between them, and means for heating the plates so that they act as sources of heat for activating the adhesive layer of the laminating film. In the preferred embodiment, the lower plate is fixed and the upper plate is mounted for vertical movement relative to the lower plate. The two plates also act as guides for directing the heated work into the nip formed by the pressure rolls.