A control circuit for a speed governor is disclosed which provides governing action of one type for operation in a normal engine speed governing mode and governing action of a different type for engine operation in a power take off (PTO) mode. In the normal mode, the throttle control means is actuated...http://www.google.com/patents/US4372265?utm_source=gb-gplus-sharePatent US4372265 - Control circuit for engine speed governor with power take off
