Arc containment system for lightning surge resistor networks
First Claim
1. A lightning surge resistor network comprising:
- a substrate;
a thick-film resistor deposited on said substrate; and
a cover overlying and being spaced a distance above said thick-film resistor so that said thick-film resistor is between said substrate and said cover.
6 Assignments
0 Petitions
Accused Products
Abstract
A lightning surge resistor network includes a ceramic substrate and a thick-film resistor deposited onto the substrate. To prevent material spatter and to contain and isolate any arcing that can occur in the event the thick-film resistor opens during a severe over voltage condition, a ceramic cover is mounted over the thick-film resistor. The thick-film resistor is thus fully contained between the ceramic substrate and the ceramic cover. Preferably, the ceramic cover is adhered to the ceramic substrate by means of an adhesive film deposited onto either the cover or the substrate adjacent the outer periphery of the cover. Preferably, the mount of adhesive is reduced at preselected locations along the outer periphery of the cover to form weakened areas in the seal between the cover and the substrate. The weakened areas permit gasses to escape in a predetermined direction in the event excessive pressures are formed under the cover when the thick-film resistor opens under an over voltage condition. Preferably, the adhesive is deposited in a pattern that subdivides the volume under the cover into a plurality of cells or isolation areas. The isolation areas form pockets that contain the arcing and help provide faster clearing times.
15 Citations
29 Claims
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1. A lightning surge resistor network comprising:
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a substrate; a thick-film resistor deposited on said substrate; and a cover overlying and being spaced a distance above said thick-film resistor so that said thick-film resistor is between said substrate and said cover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 21)
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16. A method of containing arcing in a lightning surge resistor network of the type having a thick-film resistor deposited onto a substantially planar substrate, said method comprising the steps of:
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providing a cover of sufficient dimension to overlie substantially the entire thick-film resistor; and
,mounting the cover over and being spaced a distance above the thick-film resistor. - View Dependent Claims (17, 18, 19, 20)
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22. A lightning surge network comprising:
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a substantially planar substrate; a thick-film resistor deposited on said substrate; and a cover planar on said substrate and overlying at a distance spaced above said thick-film resistor, said cover adhered to said substrate with an adhesive located adjacent to the outer periphery of said cover, such that said outer periphery of said cover completely surrounds said resistor and said resistor is enclosed between said substrate and said cover. - View Dependent Claims (23, 24, 25, 26)
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27. A method of containing arcing in a lightning surge resistor network of the type having a thick-film resistor deposited onto a substantially planar substrate, said method comprising:
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providing a cover of sufficient dimension to overly and to be spaced a distance above the thick-film resistor; depositing an adhesive on said cover in a predetermined pattern; mounting said cover over the thick-film resistor; and adhering said cover to said substrate with said adhesive. - View Dependent Claims (28, 29)
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Specification