Improvements in the object of the principal patent number 517,396 issued by: safety device for the evacuation of elevators in emergencies

摘要

Safety device of Elevator evacuation in case of Emergency (Certificate of addition of main Patent no. 517.396).Wherein is inserted in series with the Power wires of the Electric Brake Reducer driven by a centrifugal Relay System, regulated so that the open circuit from a Predetermined number of revolutions of the motor, Stopping the Movement of the cab; and because Eventually activates the contact of the relay to open the power supply to the Electric Brake,By a tachometric Dynamos, or with a Pulse Generator, which are proportional to the speed of the motor.