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US 4,047,142 AGranted
Breather assembly for electrical apparatus
AssigneeS&C Electric Company
InventorsJoseph Bernatt, John E. Guleserian
Life of this patent
Estimating the term…
Abstract
A breather assembly for permitting atmospheric venting to the interior of electrical apparatus such as a high voltage fuse while preventing moisture from entering the fuse comprises three separate chambers communicating in such a way that the atmosphere can be vented to the interior of the fuse but moisture is precluded from entering the interior of the fuse regardless of the orientation of the fuse body.
Claims10
A breather assembly for permitting atmospheric venting to the interior of electrical apparatus comprising:
- a first chamber means for communicating with the interior of the apparatus;
- a second chamber means for communicating with said first chamber means;
- a third chamber means for communicating with said second chamber means and with the atmosphere in such a manner that moisture cannot flow directly in a straight line from the atmosphere to said first chamber irrespective of the positional orientation of the apparatus whereby moisture is prevented from entering the apparatus but the atmosphere is freely vented thereto.
A breather assembly for atmospheric venting to the interior of a high voltage fuse comprising:
- a base member mounted over an open end of the fuse, said base member having at least one opening therethrough communicating with the interior of the fuse;
- first wall means extending from said base member and surrounding said opening;
- second wall means extending from said base member and surrounding said first wall means, said second wall means having openings therethrough;
- a cap means overlying said base member including an end wall and a side wall joined to the end wall, said side wall connected to said base member so that an interior surface of said end wall engages the extending edge of said second wall means but not the edge of said first wall means, said side wall having openings therethrough aligned at a position away from said openings in said second wall means so that moisture cannot flow in a straight line directly through said openings in said side wall and said second wall means to said opening in said base member whereby moisture is prevented from entering the fuse but the atmosphere is freely vented thereto.
1 more element
A breather assembly for atmospheric venting of the interior of a high voltage fuse comprising:
- a base member having threads formed thereon for being screwed onto threads in an open end of the fuse to attach said base member to the fuse, said base member having at least one opening centrally located therethrough for communicating with the interior of the fuse, said base member having a first circular wall extending essentially perpendicularly therefrom positioned around said at least one opening, and having a second circular wall extending essentially perpendicularly therefrom and positioned away from and around said first circular wall, said second circular wall having at least one opening therethrough;
- a cap member having a flat circular end wall and a curved side wall joined to the peripheral edge of said end wall and extending essentially perpendicularly therefrom, said cap member overlying said base member and said first and second circular walls so that the extending edge of said second circular wall engages an interior surface of said end wall but leaves a gap between the interior surface of said end wall and the extending edge of said first circular wall, said side wall having at least one opening therefrom positioned away from said at least one opening in said second circular wall so that moisture cannot flow directly in a straight line through said openings in said side wall and said second circular wall to said at least one opening in said base member whereby moisture is prevented from entering the fuse but the atmosphere is freely vented thereto.
In a circuit interrupter including a high voltage fuse having an interior space, and an exhaust ferrule mounted at one end;
- an improved breather assembly comprising:
- a base member connected to and substantially closing an open end of the exhaust ferrule, said base member having a vent opening to permit limited flow of gas therethrough,
- a body sealingly joined to said base member to define an enclosed hollow space, said body having openings therethrough constituting passages between said hollow space and the exterior of said breather assembly, said passages providing communicating channels between said vent opening and the exterior of said breather assembly that prevent moisture from gaining access to said vent openings, said breather assembly normally providing for limited gas flow between said interior space and the ambient atmosphere during fuse operation but which may be expelled from said exhaust ferrule when circuit interruption produces a predetermined gas pressure, thereby substantially opening said exhaust ferrule.
In a circuit interrupter including a high voltage fuse having an interior space, and an exhaust ferrule mounted at one end;
- an improved breather assembly comprising:
- a base member connected to and substantially closing an open end of the exhaust ferrule, said base member having a vent opening to permit limited flow of gas therethrough, said base member further having a reduced section adjacent said exhaust ferrule,
- a body sealingly joined to said base member to define an enclosed hollow space, said body having openings therethrough constituting passages between said hollow space and the exterior of said breather assembly, said passages providing communicating channels between said vent opening and the exterior of said breather assembly but which prevent moisture from gaining access to said vent opening, said breather assembly normally providing for limited gas flow between said interior space and the ambient atmosphere during fuse operation, but said reduced section being fracturable allowing said breather assembly to be expelled from said exhaust ferrule when circuit interruption produces a predetermined gas pressure, thereby substantially opening said exhaust ferrule.
Dependencies are inferred from the claim text.