ELECTRICAL SWITCH WITH SHEAR FORCE CONTACT WELD RELEASE

An electrical switch provides a center contact moving between two outer contacts, at least one of which is mounted on a lever. In the event of a contact weld forming between the center contact and the lever mounted contact, unison motion of the lever mounted contact following the center contact duri...

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Bibliographic Details
Main Authors OSVATIC MICHAEL S, TENGLER ADRIAN J, HINTZ MICHAEL K
Format Patent
LanguageEnglish
Published 17.01.2013
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
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Summary:An electrical switch provides a center contact moving between two outer contacts, at least one of which is mounted on a lever. In the event of a contact weld forming between the center contact and the lever mounted contact, unison motion of the lever mounted contact following the center contact during switching causes a strong shear force tending to break the weld. In one embodiment, a fulcrum wall striking the lever of the lever mounted contact causes increased angulation between the contacts so that unison motion rotates and peels the contacts apart.
Bibliography:Application Number: US201213462576