Switch operator and interlock mechanism
AssigneeABB Power T&D Company Inc.
InventorsLeo E. Blom, Eldridge R. Byron
Life of this patent
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Abstract
Switch operator having an actuator, a drive mechanism coupled to the switch for actuating a switch in response to a rotational force applied to the drive mechanism, and a flexible shaft which couples the actuator to the drive mechanism and communicates the rotational motion of the actuator to the drive mechanism. An interlock mechanism prevents the actuation of a second switch as a function of a first switch and prevents the opening of a door as a function of the position of the first switch.
Claims3
An interlock mechanism for an electrical cabinet having first and second switches and a door, said door having a hasp, said interlock mechanism comprising:
- switch interlock means for preventing the actuation of said second switch as a function of said first switch;
- and
- prevention means for preventing the opening of said door as a function of the position of said first switch, said prevention means comprising a cam having a hook for engaging the hasp of said door, the hook being adapted to engage the hasp of said door when said first switch is in a first position, but to disengage the hasp when said first switch is in a second position,
- said cam having a slot, and said interlock mechanism further comprising:
- a plunger having a spring and a first extension for engaging the slot of said cam as a function of the position of said first switch, and a second extension for engaging said door as a function of the position of the door.
Dependencies are inferred from the claim text.