Arrangement for discharging predetermined amounts of molten metal from a vessel

Claim 1

A device for discharging a predetermined quantity of molten metal comprises a vessel for holding the molten metal to be discharged, a discharge conduit connected to said vessel for discharging molten metal from said vessel, sensing means arranged to generate an output signal representing the velocity of flow of the molten metal from said discharge conduit, an integrating mechanism arranged to receive and integrate the output signal from said sensing means, control means in operative communication with said integrating mechanism for interrupting the discharge of molten metal through said conduit in response to a signal from said integrating mechanism when the cumulative output signal directed to said integrating mechanism has attained a predetermined value, said integrating mechanism comprises a motor having a motor shaft arranged to rotate at a speed in relationship to the output signal representative of the velocity flow of the molten metal from said vessel, a variable revolution counter in communication with the motor shaft of said motor for counting the revolutions thereof, said counter in operative communication with said control means for discontinuing the discharge of molten metal when said counter has counted a predetermined number of revolutions, a threaded spindle secured to and extending axially from the motor shaft of said motor, a slide member mounted on said spindle and movable longitudinally therealong as said spindle rotates, a pair of limit switches disposed in spaced relationship in the axial direction of said spindle and one of said limit switches being arranged to be contacted by said slide member at the end of a predetermined number of revolutions by said spindle whereby said control means are operable for interrupting the discharge of molten metal through said discharge conduit.

Claim 2

A device for discharging a predetermined quantity of molten metal comprises a vessel for holding the molten metal to be discharged, a discharge conduit connected to said vessel for discharging molten metal from said vessel, sensing means arranged to generate an output signal representing the velocity of flow of the molten metal from said discharge conduit, an integrating mechanism arranged to receive and integrate the output signal from said sensing means, control means in operative communication with said integrating mechanism for interrupting the discharge of molten metal through said conduit in response to a signal from said integrating mechanism when the cumulative output signal directed to said integrating mechanism has attained a predetermined value, said integrating mechanism comprises a motor having a motor shaft arranged to rotate at a speed in relationship to the output signal representative of the velocity flow of the molten metal from said vessel, a variable revolution counter in communication with the motor shaft of said motor for counting the revolutions thereof, said counter in operative communication with said control means for discontinuing the discharge of molten metal when said counter has counted a predetermined number of revolutions, a threaded spindle secured to and extending axially from the motor shaft of said motor, a slide member mounted on said spindle and movable longitudinally therealong as said spindle rotates, a pair of limit switches disposed in spaced relationship in the axial direction of said spindle and one of said limit switches being arranged to be contacted by said slide member at the end of a predetermined number of revolutions by said spindle whereby said control means are operable for interrupting the discharge of molten metal through said discharge conduit.