Racking mechanism for motor control center

Details Racking mechanism for motor control center Racking mechanism for motor control center

1982-04-28

1984-01-24

Goldberg, E. A.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

335189, 361337, H01H 920

Patent

active

044278543

ABSTRACT:
An improved mechanism for racking a contactor mechanism within an enclosure. The mechanism is urged into a fully-engaged position by an arm extending from a rotatable cross shaft which in turn is operated by a pair of complementary four-bar linkages. The first linkage in effect consists of a handle, connecting rod and bellcrank, the second consisting of the bellcrank and another arm, affixed to the cross shaft. An improved spring-loaded detent arm assists in holding the handle in the "racked on" position and a pivoted interlock engages the bellcrank in two positions.

REFERENCES:
patent: 3469043 (1969-09-01), Wilson
patent: 3588398 (1971-06-01), Siviy
patent: 3914659 (1975-10-01), May et al.

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