Metal working – Method of mechanical manufacture – Electrical device making
Patent
1993-03-26
1995-04-25
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
174 65R, 174152R, H01B 1900
Patent
active
054087406
ABSTRACT:
The firewall feed-through adapter of the present invention, and method for making, is an assembly utilizing an aluminum oxide insulator which is specially machined to interfit with the outer insulation of the conductors. The firewall shell is specially designed to compress the insulator about the conductors and their wire insulation to insure a complete sealing of the firewall side of the adapter. The shell of the adapter is machined both to reduce the labor involved in its manufacture, as well as to provide an internal frusto-conic surface which is used to compress the insulation about the conductors and their wire insulation. The action of securing the shell to the back plate simultaneously seals the shell against the firewall while sealing the insulation against the conductors and the inner surfaces of the shell. An improved method for manufacturing the adapter of the present invention, and particularly the manufacture of the insulator portion of the adapter, insures a good seal about the wire insulation of the conductors. The adapter of the present invention not only meets, but clearly exceeds the 2000.degree. Fahrenheit temperature test.
REFERENCES:
patent: 3130260 (1964-04-01), Gray
Arbes Carl J.
J-Tech
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