Double break disconnect switch
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United States of America Patent
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Dec 23, 2014
Grant Date -
N/A
app pub date -
Oct 13, 2012
filing date -
Oct 13, 2012
priority date (Note) -
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Abstract
A double break disconnect switch with a novel drive mechanism that swings the blade open and closed in a conventional manner but the rotation with respect to its longitudinal axis is unique. This mechanism uses a unique cam to rotate the blade about a hinge axis. The blade bearings are of very small diameter to reduce friction and are offset from the blade center of gravity so as to use the blade's weight to keep the blade in disengagement with the break jaw contacts when the switch is opened. The blade bearings are not around the diameter of the blade, the friction does not increase as current rating increases. A camming mechanism is profiled to give maximum rotational torque to the blade as it compresses the contact fingers as the switch closes to its final position.
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