Mechanical exercises, or, The elements and practice of carpentry, joinery, bricklaying, masonry, slating, plastering, painting, smithing, and turning . he manner of fixing theTreadle to the floor. C the Crank Hook, hooked into a staple, andthe end of the piece A. D the Crank for turning the Fly with theupper part of the crank hook formed into a collarembracing the Crank. E the Fly Wheel with several angular groovescut in its circumference, in order to hold theband and keep it from sliding. F the Pillar for supporting the end of theMandrel. G the Puppet supporting the end of the Man-drel, which
Mechanical exercises, or, The elements and practice of carpentry, joinery, bricklaying, masonry, slating, plastering, painting, smithing, and turning . he manner of fixing theTreadle to the floor. C the Crank Hook, hooked into a staple, andthe end of the piece A. D the Crank for turning the Fly with theupper part of the crank hook formed into a collarembracing the Crank. E the Fly Wheel with several angular groovescut in its circumference, in order to hold theband and keep it from sliding. F the Pillar for supporting the end of theMandrel. G the Puppet supporting the end of the Man-drel, which holds the Chuck. Hthe Right Hand Puppet, containing the forecentre which is tightened by means of a screw. I, K the Legs, the Fly being supported by thatof I, the other end is supported by an uprightbetween the legs. L the Mandrel, shewing the end of the Spin-dle projecting over the Puppet G in order to re-ceive 4he Chuck. M the Rest, tightened below by means of ascrew, and made so as to be fixed in any positionto the Chuck. N a Foot Board. O several of the most useful tools employed inTurning. • § 24, ELLIPTIC ^-^/i^^r?z6<?i^ J^lcti^e ^.. XonJonJ^tili/he/fMaTr7i gG-J,<iM 7_,,i7or-m,/7iJR7hom. \ 33 TURNING. 375 § 24. ELLIPTIC TURNING. Definition. If there be a plane with any indefinite outlineaand two inflexible right lines at right angles toeach other, and if the plane be fixed to an axisat right angles therewith, and if the two in-flexible lines be made to coincide with the planCiand be so moveable on its surface, that one ofthem, which we shall call the primary line, mayalways pass through two fixed points in theplane, and through the point where the plane isintersected by the axis, and if the other trans-verse line be made to pass or slide along a givenpoint, which is not attached to the plane, butwould remain stationary, even though the planewere in motion; and if a secondary plane be fixedto the inflexible lines parallel to the primaryplane, then if the ax
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Keywords: ., bookcentury1800, books, booksubjectcarpentry, booksubjectgeometry
