Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1979-02-16
1981-05-12
Shepperd, John W.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200288, 200275, 200243, 200241, H01H 138
Patent
active
042674182
ABSTRACT:
An electric switch device is provided having angled contact surfaces. First and second contact members are supported for movement of the second member relative to the first between open and closed positions. Planar contact surfaces of the members are in flush engagement in the closed position with such surfaces being at an acute angle, preferably between five and ten degrees, relative to the direction of movement. The contact members are substantially rigid and are so guided that the contact surfaces are at the same acute angle at impact. Preferably, the second contact member has another contact surface engageable with a contact surface of another contact member with such contact surfaces being at the same acute angle and cooperating in the same manner. The angle is such as to prevent contact bounce and prevent separation under high surge currents providing low contact resistance and minimizing operating forces.
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