(under subclass 592) Elevating devices comprising means to automatically cut off the power, usually controlled by the movement of the carrier, or to not only stop but reverse the movement of the carrier.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type,
358+, and 392+ for expansible chamber motors having means to stop the motor by controlling the motive fluid therefor in response to the position of the working member (e.g., piston).
187, Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle,
282+, and 302+ for control means for the drive of an elevator car actuated by the car contacting a trip in the elevator shaft.
192, Clutches and Power-Stop Control, 125, for stop mechanism, per se.
212, Traversing Hoists,
276+, for automatic stops for traversing hoists.
318, Electricity: Motive Power Systems,
286, for electric motor reversing control in response to movement or position of motor or device driven thereby; subclasses 466+ for electric motor starting and stopping in response to movement, position, or limit of travel of motor or other body or device.
