the contact returning to its original state a predetermined time interval after removal of operating force, e.g. for staircase lighting

Full Title

Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch (wherein the operating part is flexible H01H17/00) > having a single operating member > the contact returning to its original state a predetermined time interval after removal of operating force, e.g. for staircase lighting