Examples from the Web for actuator
The "internal controller," the actuator of all spirits, according to the text: Who abiding in the soul, rules the soul within.The Sarva-Darsana-Samgraha|Madhava Acharya
He struggled with his vulcanized suit, trying to squeeze from under the actuator.
When I put enough voltage across its terminals, the actuator clicked down through the core.The Trouble with Telstar|John Berryman
The tape moved on unperturbedly, reminding him to inspect the actuator bearings and extension rods.
Obviously, the actuator had smashed his transmitter, but left the receiver section intact.