Electrical contacts for electrically conductive carbon glasses
AssigneeCorning Glass Works
InventorRaymond E. Szupillo
Life of this patent
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Abstract
High-use-temperature electrical contacts for carbon-containing glasses which include a soft, glass-adherent metal layer in contact with the carbon phase in the glass and a compression electrode positioned over the metal layer which maintains compressive stress between the layer and the glass at temperatures up to and including the contact use temperature are described. Electrical circuit elements comprising one or more of such contacts offer stable electrical performance after repeated cycling to high temperatures.
Claims17
A high-use-temperature electrical contact for carbon-containing glass which comprises:
- (a) a continuous layer of a soft glass-adherent metal positioned on the carbon-containing glass and in contact with a conductive carbon phase therein, the layer providing electrical contact with the carbon phase;
- and
- (b) a metallic compression electrode positioned over the layer of soft, glass-adherent metal and in electrical contact therewith, the compression electrode being adapted to maintain compressive stress between the layer and the carbon-containing glass at temperatures up to and including the use temperature of the electrical contact.
An electrical circuit element consisting of a carbon-containing glass body to which is attached at least one high-use-temperature electrical contact comprising:
- (a) a continuous layer of a soft, glass-adherent metal positioned on the carbon-containing glass body and in contact with a conductive carbon phase therein, the layer providing electrical contact with the carbon phase;
- and
- (b) a metallic compression electrode positioned over the layer of soft, glass-adherent metal and in electrical contact therewith, the compression electrode being adapted to maintain compressive stress between the layer and the carbon-containing glass body at temperatures up to and including the use temperature of the electrical contact.
An electrical heating element consisting of a cylindrical carbon-containing glass body to which is attached at least one high-use-temperature electrical contact comprising:
- (a) a continuous layer of a soft, glass-adherent metal forming a circumferential band around the cylindrical porous glass body and providing electrical contact with a conductive carbon phase therein;
- and
- (b) a metallic compression electrode positioned over and in electrical contact with said layer, the compression electrode consisting of a circumferential ring structure adapted to maintain compressive stress between said circumferential band of soft, glass-adherent metal and the carbon-containing glass body at temperatures up to and including the use temperature of the electrical contact.
Dependencies are inferred from the claim text.