Variable drive mechanism for the panel of a gate or similar structure

Abstract From the Canadian patent

Variable electrically motorized drive mechanism for gates or similar structure close-off devices that can be installed for the purpose of an assembly operation that is as heavyduty as possible and without fine adjustments for which, purpose the gate is provided with controls that essentially comprise a position detector, a memory and a reference-, point indicator, the last of which is positioned between the gate-panel limiting positions and outside of any stop positions or defines a corresponding gate-panel referencepoint position and synchronizes the position detector at each stroke such that the path that the panel is to travel along from the reference-point position into a particular …