AMF CONTACT FOR VACUUM INTERRUPTER WITH INFORCEMENT ELEMENT
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United States of America Patent
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Issued Date -
Jun 11, 2015
app pub date -
Dec 11, 2014
filing date -
Dec 11, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An AMF contact for a vacuum interrupter includes concentric opposing contact pieces. The contact pieces include an external electrode shaped like a coil with a plate as a bottom plate of the external electrode, which generates a strong axial magnetic field, and an inner internal electrode as a top electrode carrying the nominal current. To enable the outer electrode to generate the axial magnetic field as requested for an application, a rod is arranged between the top electrode and the bottom plate. A first end of the rod is fixed at a lower side of the top electrode, and a second end of the rod is guided through an opening of the bottom plate. The second end of the rod has an extended head which locks or tightens the rod in a defined axial position. The disclosed embodiments are applicable for standard AMF or TMF (cup) contacts to reinforce them.
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