Electricity: conductors and insulators – Insulators – Through wall or plate
Patent
1981-07-16
1985-01-15
Askin, Laramie E.
Electricity: conductors and insulators
Insulators
Through wall or plate
403 29, 403 30, H01B 1726, C03C 2702
Patent
active
044933789
ABSTRACT:
First and second members are disposed in spaced relationship to each other. The members may be electrically conductive. The first member may be provided with a particular coefficient of thermal expansion which is higher than the coefficient of the second member. A plurality of layers of insulating material are disposed between the first and second members and are hermetically sealed to one another and to the first and second members. Each of the layers of insulating material has a coefficient of thermal expansion less than the particular coefficient. The progressive layers of insulating material from the first member have coefficients of thermal expansion of decreased value. This causes the layers of insulating material to have coefficients of thermal expansion which approach the coefficient of the second member with progressive distances toward the second member. A third member may be disposed between the second member and one of the insulating layers in hermetically sealed relationship to the second member and such insulating layer. The third member may be provided with a coefficient of thermal expansion corresponding substantially to that of the first member. Alternatively, an additional layer of insulating material may be disposed between such layer of insulating material and the second member. This layer may be provided with properties of resisting substantial forces without any deterioration in the hermetic seal.
REFERENCES:
patent: 1558524 (1925-10-01), Winninghoff
patent: 2100187 (1937-11-01), Handrek
patent: 2114869 (1938-04-01), Bol et al.
patent: 2136052 (1938-11-01), Hurley
patent: 2517019 (1950-08-01), Nordberg
patent: 4282395 (1981-08-01), Hagemann
patent: 4308323 (1981-12-01), Bowsky
Askin Laramie E.
Roston Ellsworth R.
Schwartz Charles H.
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