The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2018
Filed:
Mar. 27, 2014
Schneider Electric Usa, Inc., Andover, MA (US);
Hamid S. Abroy, Murfreesboro, TN (US);
SCHNEIDER ELECTRIC USA, INC., Andover, MA (US);
Abstract
The invention disclosed is a knife blade switchhaving copper jawsand a copper bladewith a steel end-platefastened to the free end of the blade, the steel end-plate having a higher resistivity than the resistivity of the copper blade and copper jaws. As the copper blade is withdrawn from the copper jaws, the steel end-plate of the blade remains in contact with a higher resistivity steel jaw-spring mounted on and electrically connected to the copper jaws. The connection of the steel end-plateof the blade with the steel jaw-springimposes a greater resistance path for the current flowing through the switch than through the copper bladeand copper jaws, so that an arc formed at the plate and jaw-spring has a diminished current, over what would otherwise occur with a copper blade and jaws, when the contact separation occurs.