Actuator-controlled keylock switch
AssigneeLa Telemecanique Electrique
InventorsDenis Berthaud, Andre Vergez
Life of this patent
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Abstract
A key attached, for example, to the door of an electrical equipment cubicle is capable of sliding within a passageway so as to cause pivotal displacement of a cam and upward displacement of a push-rod, thus releasing a switch lug. A locking rod forming part of a slide-block which is coupled with the push-rod is capable of moving between a locking position in which an annular channel permits displacement of the key and an unlocking position in which the locking rod is engaged within a key notch. One end of the slide-block projects from the top face of the switching unit head in order to be downwardly displaced by an actuator, whereupon the key can be withdrawn without difficulty or danger.
Claims12
A keylock safety switching unit, comprising a key selectively insertable within a key-receiving assembly, said assembly comprising:
- at least one switch provided with a control member movable between two control positions corresponding to two conditions of the switch;
- a movable component mounted within said assembly and displaceable by said key between an inserted-key position and a withdrawn-key position;
- a transmission member mounted operatively between said movable component and said control member of said switch for displacing said control member between the two control positions thereof;
- a locking member connected to said transmission member for displacement therewith, said locking member being in a key-locking position when said transmission member is in a position allowed by the movable component when said movable component is in the inserted-key position, and said locking member being in a key-release position when said movable component is in the withdrawn-key position;
- and
- means for selectively urging said locking member to the key release position when said movable component is in the inserted-key position.
Dependencies are inferred from the claim text.