Abstract: A method of manufacturing a sheathed electrical heater assembly comprising the steps of: molding a core element into a desired shape, the core element having an outer surface; heating the core element at an elevated temperature sufficient to release organic material from the core element; placing a heating element in communication with the core element; and, encapsulating the core, and the heating element in an insulation protection layer, whereby the heater assembly is formed. Additionally shown is a sheathed electrical heater assembly comprising: a core made of an organo-ceramic material; a heating element in communication with the core; an insulation protection layer encapsulating the core and heating element to produce the heater assembly, the protection layer comprising and organo-ceramic material; and, a sheath encapsulating the heater assembly, the sheath also comprising an organo-ceramic material.

Abstract: A heated hand grip is disclosed having an internal sleeve and an external protective jacket where the sleeve is formed with external, helical lands and grooves about which a strand of resistance wire is sewed and anchored snugly. The disclosure includes a method of manufacturing the heated hand grip.

Abstract: Small portable electrical resistance heated radiant heating unit useful for insertion in tube bores to effect localized high temperature heating. Useful for the internal heating of tubes and tube/sleeve assemblies in steam generators, having bores as small as 0.75 cm. or less, for brazing, stress relieving, and other applications.