Specification of Thomas Bushby : pill-making machine.

  • Bushby, Thomas.
Date:
1868
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Thomas Bushby : pill-making machine. Source: Wellcome Collection.

    5/8 (page 3)
    ■ _Bushbys Improvements in Pill-making Machines. strips or bars by means of a self-acting knife or grooved rollers, and the bars one after the other fall upon a number of circular grooved cutters. At a portion of the circumference of each grooved cutter there is a stationary grooved cutter, the grooves being opposite each other forming a circle in transverse section, §o that when revolving motion is given to the circular grooved cutters the bars shall be cut and shaped into pills. On the accompanying Sheet of Drawings Fig, 1 is a side elevation of the apparatus for forming the mass into sheets, and Fig. % a cross section of the rollers ; Figs, 3 and 4 are longitudinal and front elevations, and Fig. 5 a 10 longitudinal section of the machine for forming each sheet first into bars and then into pills. In Fig, 1 a represents the table on which the mass is placed, to each side of which table are fixed small frames h, each having a stationary bearing and an adjustable bearing d for carrying the plain rollers <?,/, Figs. 1 and 2, fixed J5 to the shafts gf h, which rollers can be adjusted to any required distance apart by adjusting screws i, To one end of both shafts are fixed toothed wheels j, k> and at ope end of one shaft the driving handle l, and when the mass is pushed against the rollers, and the rollers turned, the mass is formed into a sheet of uniform thickness, 20 In Figs. 3, 4, and 5, m represents the side frames of the machine, each frame having at the top a slot or groove n in which is placed the knife o, and to the frames is fixed the table p, on which is placed the sheet to be formed into pills. The frames carry the grooved roller $ fixed on the shaft r, the grooves being of a semicircular form for the purpose of acting as revolving 25 cutters and shapers, and to the frames is fixed the segment or shell s, havin'' as many semicircular grooves t as there are grooves in the roller, the grooves in the segment being opposite to and corresponding with the grooves in the roller for acting as stationary grooved cutters and shapers. On the shaft r there are two eccentrics u connected by eccentric rods v to a pin w at each end of the 30 knife o, so that when the shaft is turned by the handle x the knife will move up and down. For feeding the sheet to the knife I employ a bar y bolted to levers z, each having ope end placed in supports a1 fixed to the side frames, and carrying at the other end two bowls b1 and a projecting plate c1; and on the shaft outside each side frame there are two cams d1, e\ for giving upward 35 and to.and-fro motions to the levers and bar, the downward motion bein'' given by the springs/1 when the bowls and plates are free of the cams°. When the machines are worked conjointly.a continuous sheet is formed and advanced to the knife, but when they are worked separately (which is preferred) the sheets one after the other are placed on the table p of the