KRAFTBETRIEBENES TÜRÖFFNUNGS- UND -SCHLIESSSYSTEM

摘要

The power-operated door opening and closing system ( 10 ) of the present invention is of the kind adapted to be attached to the ceiling and comprises: an electric motor, an electric motor control unit, an electric push-button (P) actuating switch to control the motor operation, a string ( 30 ) or the like, and a mechanism adapted to convert the pulling of the string into a pressure upon the push-button switch or a pull of the pull-type switch.