The mold board, together with the pull rod extendingfrom the front end of the wheel frame, constitutes a bellcrank, which is under tension when the plow is liftedout of the ground and under pressure when the plow islowered. For lifting the plow, use is made of the handwheel b with a threaded shank… … Depth adjustment on plow built by P. Stumpf beam front end, the same as with a horse plow. Whenlifting the plow, the nut c travels upward and pulls a steelcable e leading over pulleys thereby also raising the rearend of the plow. This operation is facilitated by the coun-terweight / at the other…
Automobiles · Aeronautics
Internet Archive · University of Toronto Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-336-151.webp)
