Electric heating – Heating devices – With heating unit structure
Patent
1990-05-09
1991-07-23
Reynolds, Bruce A.
Electric heating
Heating devices
With heating unit structure
219544, 338240, 338274, H05B 308, H05B 352
Patent
active
050345958
ABSTRACT:
A cartridge heater, wherein the terminal lead pins which project from the terminal end of the heater at the outer surface of the electrical insulating end plug, are substantially reduced in length and provided with at least one flat planar surface on what was originally the cylindrical surface of each lead pin. The terminal ends of the external flexible lead wires are then fused to the flat surfaces on each of the lead pins by means of brazing, soldering or welding. An end adapter unit having two longitudinal bores is then threaded up over the two flexible lead wires until the outer casing, which encloses an electrical insulating core having the two circular bores for the flexible wires, is telescoped over the terminal end of the cannister which encloses the cartridge heater. The two bores within the end adapter are of a dimension sufficient not only to encompass the diameter of the flexible lead wire within each bore, but also of a diameter sufficient to enclose the fused end of the flexible lead wire and the foreshortened length of each lead pin. When the end adapter has been mounted on the outside surface of the cannister of the heating element, compressive force is applied by a conventional means, such as swaging, in order to compress the outer surface of the end adapter casing until its diameter is substantially equal to the diameter of the cannister of the electrical heater.
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Jeffery John A.
Ogden Manufacturing Co.
Reynolds Bruce A.
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