An operator presence control assembly for a walk-behind greens mower includes a handle supported on a frame of the walk-behind greens mower, a ribbon switch on the outer perimeter of the handle, and a circuit including the ribbon switch. The circuit is completed by applying a threshold pressure to the...http://www.google.ca/patents/US7228679?utm_source=gb-gplus-sharePatent US7228679 - Electrical method of sensing operator presence on a walk-behind mower
