In a heater in which an electrically insulating material (4) including an oxide is filled between a heating element (2) made of metal including chromium and aluminum and a cover (3, 5, 6) for sealing the heating element (2), and in which a lead wire (7, 8) of the heating element (2) extends through a portion (5, 6) of an electrical insulator of the cover (3, 5, 6) in order to enable the heater to be used at temperatures higher than the prior art, an oxide film including aluminum oxide is formed ...

A radiant heater mounting heating elements in a sealed housing with a ceramic heat transmitting wall. A fan is mounted in the housing to cool the heating elements and in practice provide additional heat. There are also vent assemblies which prevent water such as rainwater or even water from, for example, a hose entering into the heater and causing failure.

A heater comprises a casing, which has an interior chamber. It further comprises a rotor, which is formed as an impeller on the one hand and as an eddy-current disk on the other, and a magnet support, which is equipped with permanent magnets and disposed non-rotarily in the casing and which is displaceable into an operating position in the direct neighborhood of the eddy-current disk and into a position of rest spaced therefrom. The eddy-current disk and the magnet support equipped with permanen...

A heater comprises a substrate and an electrically conductive heating section having branched portions on its lateral edge. The heating section has notches at those portions of its lateral edges that are opposite to the branched portions. The notches increase electric resistance of the heating section at the branched portions to enhance heat generation of the heating section at the branched so that the heating section is heated at a predetermined temperature over the entire length of a transfer ...

A heater, in particular a motor vehicle heater, has a muffler insert in the exhaust gas outlet, a muffler insert that reduces, in particular, disturbing, low-frequency combustion noises. With the aid of the muffler insert, the exhaust gas stream in the area of the exhaust gas outlet of the heater is divided into at least two partial streams. The muffler insert can be made as a sheet metal part having hollow bodies that are made of pipe pieces. Alternatively, the muffler insert can be made as a o...

Positive temperature coefficienct thermistors are mounted in heat transfer relationship to a support member of a material that is pervious to light. The thermistors are positioned on the support member to provide a large unobstructed area through which light may pass. The self-limiting nature of the thermistors eliminates the need for a separate temperature responsive heater control switch. The heater is useable for heating liquid crystal displays, and allows back lighting of such displays by a ...

A heater for heating a stream of air has a burner assembly to heat the stream as it flows along a flow path and a primary heat assembly positioned in the flow path and coupled to the burner assembly for conducting gaseous combustion products. The primary heat exchange assembly has an array of U-shaped heat exchange tubes for conducting hot combustion products generated by the burner assembly to an array of second U-shaped heat exchange tubes for combustion products discharged from the first heat...

A firebox is provided having an end panel, opposite side panels and top and bottom panels, one end of the firebox being open. The firebox includes depending support legs and an outer housing including opposite side and end walls and a top wall is telescoped downwardly over the firebox with the front wall thereof sealingly secured across the open end of the firebox and the other end wall, the top wall and opposite side walls spaced outwardly from the end panel, top panel and opposite side walls, ...

A heater for drying printed material and the like is provided which includes a mounting frame for mounting the heater on a press and the like. The heater is movable on the mounting frame between operating and storage positions. A heat deflector assembly deflects heat away from the impression cylinder of the press. A heat lamp assembly is mounted on the heat deflector assembly and includes an enclosure with a pair of quartz tube, infrared heat lamps therein.

A solar fluid heater embodying a plurality of loops of flexible plastic tubing is provided with means for protecting and reinforcing the return bends at the ends of parallel lengths of the tubing to protect them against distortion, undue expansion or rupture upon prolonged usage or when the tubing is subjected to high temperatures or pressures.