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US 3,955,167 AGranted
Encapsulated vacuum fuse assembly
AssigneeMcGraw-Edison Company
InventorDavid G. Kumbera
Life of this patent
Estimating the term…
Abstract
Fuse adapters are connected to the contact rods of a vacuum fuse. A rubber coating is provided over the entire outer surface of the vacuum fuse, but not over the fuse adapters. An epoxy body is molded over the coated fuse and the fuse adapters. Cavities are provided in the body to define wells, the fuse adapters being exposed in the wells to permit electrical connection to the fuse through the adapters.
Claims7
An encapsulated vacuum fuse assembly comprising, in combination,
- a body of electrical insulating material,
- a vacuum fuse including a housing and a fuse element in said housing, said vacuum fuse embedded in said body and also including first and second spaced terminal means for connecting said fuse element in an electrical circuit,
- said body having generally close engagement over the outer surface of said vacuum fuse,
- a coating of flexible material extending over the housing of said vacuum fuse, said coating in intimate engagement with said body and accomodating relative expansion and contraction movement between said vacuum fuse housing and said body due to temperature variations to thereby maintain generally void free engagement therebetween,
- and means in said body for providing conductive access to said terminal means for making electrical connections thereto and including fuse adapter means electrically and mechanically connected to said vacuum fuse terminal means and through which current exchange to said vacuum fuse is made,
- means defining first and second openings in said body open to the fuse assembly ambient, and said fuse adapter means projecting into said openings for accepting external circuit connections.
3 more elements
Dependencies are inferred from the claim text.