Heater assembly method

Details Heater assembly method Heater assembly method

1996-05-22

1999-02-02

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

29869, 29871, 29873, 219541, H05B 300, H01R 4300

Patent

active

058649417

ABSTRACT:
Various methods are described for assembling and/or coupling heater sections together for assemblage of heaters. The heater sections may be hot or cold heater sections having various geometries, dimensions, and specific electrical resistances. In one method, a cold heater section is assembled onto a pre-fabricated hot heater section with an oversized tube and pre-fabricated insulating cores. In another method, a pre-fabricated cold section is spliced onto a pre-fabricated hot section utilizing pre-fabricated semi-annular insulating cores and an oversized sleeve. In a further method, a first pre-fabricated hot section is spliced onto a second pre-fabricated hot section via an electrically conductive core and an oversized sleeve. These methods allow for the manufacture of stock lengths of hot and cold heater sections, that are then cut to length and coupled together. According to one aspect, the methods reduce tolerance errors in heater length. Various combinations of single or multiple coiled hot heater sections may be coupled together or to cold heater sections with single or multiple power pins. The hot heater sections may have the same specific resistance along its entire length or may be variable.

REFERENCES:
patent: 1523434 (1925-01-01), Lightfoot et al.
patent: 2375058 (1945-05-01), Wiegang
patent: 2577080 (1951-12-01), Glenn
patent: 2854556 (1958-09-01), McOrlly
patent: 3859721 (1975-01-01), Cunningham et al.
patent: 4033028 (1977-07-01), Howie et al.
patent: 4314401 (1982-02-01), Saku

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