Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . Norfolk, Eng-land, contrived several ingenious improvements tothe machine, the first of which was in making asliding axletree, by which the carriage-wheL-l couldbe extended when necessary to the width of thestitches (), and so enable another with cupsand more colters to be used. A drill containingfourteen colters could be thus enlarged to containeight
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . Norfolk, Eng-land, contrived several ingenious improvements tothe machine, the first of which was in making asliding axletree, by which the carriage-wheL-l couldbe extended when necessary to the width of thestitches (), and so enable another with cupsand more colters to be used. A drill containingfourteen colters could be thus enlarged to containeighteen, or even twenty. They also constructed self-regulating levers, towhich the colters were attached ; by hanging eachcolter on a se]iarate lever, each lever swinging byan ordinary hinge-joint, and having a iiiovaljleweight at the outer end to press the colter into thesoil to the reipiired de]itli. After Tull, the machine was much improved byJames Cooke, a clergyman, of Lancashire, England ;his improvements have been adopted in almost allof the subse(juent machines used in English hus-bandry. Mr. Ran some states : — The is of a peculiar ., the hinderpart extending lower than the forepart. It is di- Fig. Enslisit Grain-DiiU. GRAIIT-DRILL. 1003 GRAIX-DRILL. Tided by partitions, and sujiported by adjustablebearings so as to preserve a regular delivery of theseed, while the machine is passing over unevenground. The feeding cylinder is made to revolveby a toothed wheel, which is fixed on each end ofthe main axle, and gears with other toothed wheelson each end of the cylinder ; the surface of the cyl-inder is furnished with a series of cups, whicli re-volve with it, and are of various sizes, accordingto the different seeds intended to be sown. Thesedeposit the seed regularly in funnels, the lower endsof which lead immediately behind the coltei-s, Fig. 2279.
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Keywords: ., bookcentury1800, booksubjectin, booksubjectmechanicalengineering
