Eaton Corporation

Richard J Holland

Ronald J Fritsch

James A Becker

Robert F Klobuchar

A manually rotatable latch of a control unit has an oblong cross-section shalt extending through a keyhole slot in a slider, the wide dimension of the shaft being greater than the narrow portion of the slider, to block movement of the slider when the latch is extended to lock the unit to the cabinet or block insertion of the unit to the cabinet. A link from the slider extends into the path of movement of an operator to block movement of the operator to an ON position of switching apparatus of the control unit when the latch is extended. The link takes advantage of optimal latch location substantially centered in the control unit to minimize twisting of the unit within the cabinet when removal is attempted without releasing the latch.

Motor control center removable control unit interlock

A plate pivotally mounted to a padlock hasp adjacent a reciprocally movable operator handle is pivotable from a stored position to one covering the opening of the hasp, the plate having a hole aligned with the opening and smaller than the opening to receive the shackle of a single, scissors-type safety lockout and maintain the shackle in position to block movement of the operator handle to an operated position. The hole is preferably rectangular to conform to the flat, thin shape of the safety lockout shackle to maintain the shackle properly oriented. An additional round hole for a smaller diameter padlock shackle may be provided in said plate.

Growing community of inventors

Glendale, WI, United States of America

Richard J Holland