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US 5,844,186 AGranted
Motor contractor with mechanical lock-out
AssigneeAllen-Bradley Company, Inc.
InventorJames H. Meriwether
Life of this patent
Estimating the term…
Abstract
A contactor for use in controlling electrical motors may include a mechanical stop engaging the armature of the contactor and having an eyebar receiving one or more shackles of padlocks to prevent closure of the contactor contacts despite the application of an actuation current. An auxiliary switch may disconnect the coil of the contactor when the stop is positioned to lock the contactor providing additional resistance to actuation of the contactor 10.
Claims8
In an electrical contactor of the type having
- a contactor coil having terminals to receive an activation current and a tab for movement along an actuation direction when the activation current is received by the terminals to activate the contactor, the improvement comprising:
- a stationary plate fixed with respect to the coil and providing a jamb;
- a sliding plate held by the stationary plate to slide along an axis with respect thereto, the axis being substantially perpendicular to the actuation direction of the armature;
- a movable stop attached to the sliding plate and having a first position blocking movement of the tab and a second position permitting movement of the tab;
- and
- an eye bar attached to the movable stop and having at least one eye passing through the jamb with motion of the stop, the eye sized to receive a shackle of a padlock, the jamb preventing motion of the eye bar and stop when the shackle is so received.
3 more elements
Dependencies are inferred from the claim text.