(under subclass 492) Apparatus wherein means are provided to positively disengage the actuating means from the source of power when the earth working element has reached a predetermined position.
(1) Note. A simple slip clutch is not included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
129, for means utilizing the power from a ground wheel to adjust an earth marker.
410, for apparatus comprising a frame vertically adjustable relative to a wheel mounted on a crank axle and having a self-interrupted clutch.
SEE OR SEARCH CLASS
192, Clutches and Power-Stop Control, 33, for an automatic clutch having a manual control and definite position release.
