. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . Fig. 2.—Hand plow. than to a hard-tempered surface passing through it. The mould-board particularly should,therefore, be not only well shaped but well tempered to scour and prove durable. Thelarge permanent plow manufacturing establishments now keep stocks of duplicate parts formodern-made plows, readily obtained and applied even years after the plow was made. Im-provement in outline also marks the products of all t
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . Fig. 2.—Hand plow. than to a hard-tempered surface passing through it. The mould-board particularly should,therefore, be not only well shaped but well tempered to scour and prove durable. Thelarge permanent plow manufacturing establishments now keep stocks of duplicate parts formodern-made plows, readily obtained and applied even years after the plow was made. Im-provement in outline also marks the products of all the great factories, as will be evident byinspection of the modern hand plow (Pig. 2). Deeres Riding Plow (Fig. 3) is a light, three-wheeled implement made of wrought andmalleable iron and steel. The wheels are steel and carry the heel of the land-side clear of thefurrow bottom, so that there is no weight except on the wheels. The swing of the tongue to. Fig. 3.—Deeres lidiug plow. right or left unlocks the spindle of the rear furrow wheel, which then becomes a caster,admitting of a square turn of the plow at eornei-s. When the horses are again straightenedout this wheel returns directly aft and locks itself rigidly in line with the furrow until againunlocked by the swing of thetongue at the next corner. The plow bottom draws by a steelbeam pivoted to the front of the frame, and is thus self-lining. The bottom on this class ofplows can be changed to suit different sorts of plowing. In opening a furrow the frontfurrow wheel is lifted and held up by a suitable lever. The depth of plowing is regulated by 636 PLOWS. the left-hand lever. The amount of land taken is regulated by adjustment of the tongueslightly toward right or left by appropriate means. On arriving at a corner the end of thefurrow can still be kept down to standard depth by raising the front furrow wheel slightlyat the moment of turning. GaWs Riding or Walking Plow, illus
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
