. Appleton's dictionary of machines, mechanics, engine-work, and engineering. olt-head, as shown in the transverse section, Fig. 3094. Theprojecting part of the bolt passes through a hole in the end of the connecting-rod H, the opposite endof which is attached by another bolt to a rectangular cast-iron piece I, fixed to the end of the driving-spindle, and acting as a crank for converting the rotary into a rectilinear motion. The crank I istraversed throughout its whole length by a slot i, the form of which, as well as of that in the slide E, isshown in the section, Kg. 3094. By means of these
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. olt-head, as shown in the transverse section, Fig. 3094. Theprojecting part of the bolt passes through a hole in the end of the connecting-rod H, the opposite endof which is attached by another bolt to a rectangular cast-iron piece I, fixed to the end of the driving-spindle, and acting as a crank for converting the rotary into a rectilinear motion. The crank I istraversed throughout its whole length by a slot i, the form of which, as well as of that in the slide E, isshown in the section, Kg. 3094. By means of these slots the length of the stroke and the position o*the tool may be easily and accurately adjusted to suit the work, as will be sufficiently obvious byinspection of Fig. 3088. The driving-spindle works in two bearings, one of which, as before mentioned,is cast on the bed of the machine B, and the other is formed in the extremity of a bracket bolted to theside of it. The velocity of the driving-spindle is varied and regulated by means of the cone-pulley Jand fly-wheel K The planing of circular surfaces is effected, in this machine, by means of a hollow cylindrical cast-ironmandrel L, Figs. 3091 and 3092, accurately turned and fitted into the body of the machine, the centrebeing exactly under that of the square slide E. This mandrel is provided with a conical bearing on thefront end, and is traversed by a malleable iron bolt I, secured to its opposite extremity by a nut. Thehead of the bolt I is formed into a cylindrical socket, into which, by means of a cotter, is fixed anotherbolt, having two conical pieces m m, one of which is immovable, and forms part of the bolt, while theother slides upon it, and is adjusted by means of the nut n. These pieces are used for the purpose offixing the work M, upon which the machine is to operate; and from their conical form, adapt themselvesto any required diameter, so as to insure, without any trouble in setting, the concentricity of the
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
