Improvements in the construction of electromechanical devices intended for the operation of swinging barriers (Machine-translation by Google Translate, not legally binding)

摘要

Electromechanical operation of swing barriers. A length of fixed length, articulated by one of its limbs to a crank moved by a motorreductor is articulated by the other extreme with the approximate mid point of another crankcase that rotates freely on the driving axle of the barrier, carrying together such a crank for its internal face a piece that is solidarized to the driving axis, both parts and joints are united between their corresponding superior extremes through a helicoidal spring. (Machine-translation by Google Translate, not legally binding)