Patent GB-190108980-A (GB)
Title: Improvements in or relating to Fluid Metal Injecting Mechanism for Type Casting and other Machines.
Inventor: BOULT ALFRED JULIUS
Filed: 1901-05-01
Granted: 1901-11-09
Abstract: 8980. Boult, A. J., [Lanston Monotype Machine Co.]. May 1. Monotype and like machines; linotype machines; type.-Relates to fluid-metal injecting-mechanism of " monotype," type-casting, and like machines, and is described as designed for the type casting and composing machine described in Specification No. 8633, A.D. 1899. Fig. 6 shows a vertical section of the metal pot and pump, which is carried by a frame 2 mounted to swing upon a fixed part of the framing of the machine. On the frame 2 is mounted a casing comprising inner and outer sections 4, 5 with a space between them for a non- conducting packing such as asbestos. The outer casing has an inturned edge or flange formed with a seat for the upper edge of the inner casing 4, and at the base it is furnished with lugs 7 for attachment to the frame 2, and with detachable clamping- sections 8 for holding the inner section in place. The inner section is formed with an open top, and with downwardly-projecting flanges 9 for admission of the burners, and at one end it is formed with a flue 10 on which is placed the pipe 11. The melting- pot 12 is an open vessel fitting into the inner casing 4. The pump 15 is separate from the melting-pot and is immersed in the molten metal. It comprises a cylinder 16 with an arm 17 formed with a passage leading from the cylinder to the nozzle 18 on the end of the arm, and a piston 15 with a passage 20 which registers with an inlet passage 21 when the cylinder is in its raised position. The piston is stopped in its raised position by a stop plate 22 engaging a shoulder thereon. The pump is supported, and moved to bring its nozzle 18 up p to the mould, by two levers 23, 24 in bearings on the part 5 of the casing. The end 25 of the lever 23 engages a socket 26 in the end of the arm 17, and the lever 24 has two forked arms 27 engaging a flange 28 on the pump frame. A latch holds the lever in engagement with the flange 28, and may be disengaged for removal of the pump from the melting-pot. The rear ends of the levers 23, 24 are forked, and engage a vertical rod 30 having an adjusting-nut 32 above each lever. The rod 30 is pulled downwardly to lift the pump by a spiral spring, when such downward movement is permitted by a lever 52 engaging one of the levers by which the pump piston is actuated. The mechanism for operating the pump plunger comprises a pair of levers substantially the same as those described in the prior Specification referred to. The levers loosely engage seats formed on the pump frame and plunger, respectively, so that, when the frame 2 is swung on its pivot, the levers are withdrawn from their seats, and, when the frame 2 is swung back, they will be re-engaged. The upper lever is pivotally connected through a springrod with an arm secured to the upper end of a shaft mounted to slide vertically in the main frame. The lower lever is connected by a swivel joint to an arm on a second shaft sliding vertically in the frame and pressed downwardly by a spring. Part of the arm on the second vertical shaft engages under that on the first shaft. A foot extending laterally from the first shaft engages under the pressing-spring on the second shaft. When the first shaft is moved up, it carries with it the second until the latter is stopped by a nut thereon engaging the framing, when the further upward movement of the first shaft operates the upper pump lever independently and gives the stroke to the piston. The stop 22 acts as a clamp against which the piston is clamped or held firmly as the nozzle leaves its seat, preventing accidental movement of the piston and consequent scattering of metal. The vertical shaft is lifted for operating the pump and plunger, by a bell-crank lever connected by a rod to an arm of a sleeve 63, Fig. 8, loose on a shaft 69. A second arm 64 on the sleeve 63 is provided with a pivoted latch 65 for engaging it with an arm 67 on the shaft 69. The arm 67 is connected by a rod 68 with the main pump-actuating lever. The latch 65 is lifted to disengage the arms 64, 67 when a collar 73 on a longitudinally-movable shaft 72 is moved into the path of the latch. The shaft 72 is moved to trip the latch by an arm 77 on the sliding galley trip shaft 76. On an extension from the shaft 76 is a pivoted bar 79 engaging, on opposite sides of its pivot, the lower ends of the two justifying- wedge levers 80. When either or both of the levers 80 is actuated, to set the justifying-wedges, the arm 77 will be advanced and the shaft 72 moved into position to trip the latch 65 and suspend the action of the pump during the next movement of the arm 67.