Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1978-12-29
1980-07-29
Mayewsky, Volodymyr Y.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
13 20, 13 22, 174 42, 206443, 206589, 188 1B, 219536, 219546, 338234, H05B 362, F27D 1102
Patent
active
042152330
ABSTRACT:
Electrical resistance heating elements made of graphite and disposed in a ceramic tube are protected against breakage during shipment by cardboard inserts which are telescoped over the heating elements and into the tube. When the heating elements are first energized, the inserts burn away into harmless ash which falls to the bottom of the tube.
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patent: 2457262 (1948-12-01), Norquist
patent: 2969416 (1961-01-01), McGovern
patent: 3246073 (1966-04-01), Bouche et al.
patent: 3712465 (1973-01-01), Deuschle
patent: 4130185 (1978-12-01), Densmore
patent: 4131198 (1978-12-01), Fischer
patent: 4135053 (1979-01-01), Kastilahn et al.
Alco Standard Corporation
Mayewsky Volodymyr Y.
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