(under subclass 2) Apparatus wherein the condition sensed is the location of an obstruction or plant.
(1) Note. A stake or other object which has been previously placed in position for the purpose of controlling an earth working implement which is intended to approach such object is not considered to be an obstruction within this definition since its sensing is not considered to be a condition which may or may not occur. See search notes below for such apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
23+, for a stake or other object which has been previously placed in position for the purpose of controlling an earth working implement which is intended to approach an object
38, for driven tools having an obstruction feeling device which moves the implement.
233+, for apparatus having an obstruction feeler for moving an implement to avoid the obstruction, the obstruction feeler providing the power necessary to move the implement or merely unlatching the implement so that it may move. SEE OR SEARCH CLASS
56, Harvesters,
121.4+, for harvester cutters with plant or crop contacting gauges.
