Electricity: circuit makers and breakers – Switch activation inhibitor – Actuator locking device
Patent
1997-04-08
1998-10-06
Walczak, David J.
Electricity: circuit makers and breakers
Switch activation inhibitor
Actuator locking device
200 4316, H01H 928
Patent
active
058179984
ABSTRACT:
The present invention provides an electrical switch locking assembly for inhibiting movement of a switch handle. The switch handle is enclosed in a casing or housing and moves operatively along a path between first and second positions to open or close electrical contacts for opening or closing a circuit. First and second recesses are molded into the casing to receive a locking device across the path of the switch handle. The locking device has first and second legs pivotally connected like scissors. The first leg has an integral first foot projecting away from the second leg, and the second leg has an integral second foot projecting away from the first leg, like scissor-blade tips having opposing projections. The first and second legs each have an opening opposite the first and second foot, respectively, somewhat like scissor handles. The first foot is inserted into the first recess and the second foot is inserted into the second recess. A locking shaft, such as a padlock or screw, is secured in the opening to hold the feet in engagement with the recesses. The locking device is thus engaged across the path of movement of the switch handle so that the switch handle can be locked in a desired position. In this manner a circuit can be maintained in either a de-energized or energized state until a change is authorized.
REFERENCES:
patent: 3076876 (1963-02-01), Stanback et al.
patent: 3376400 (1968-04-01), Batt et al.
patent: 3426164 (1969-02-01), Dessert
patent: 3595040 (1971-07-01), Curl
patent: 4677261 (1987-06-01), Nourry
patent: 5412167 (1995-05-01), Mueller et al.
Francis, Jr. Donald Charles
Siebels Randall Luther
Van Waart Douglas Paul
Golden Larry I.
Irfan Kareem M.
Square D Company
Walczak David J.
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