Patents Assigned to Lester Engineering Company
  • Patent number: 4356940
    Abstract: Apparatus for dispensing measured amounts of molten metal to a metal casting operation which is automatic in operation and capable of delivering extremely accurately controlled amounts of metal to the casting operation. A positive displacement pump delivers the molten metal from below the surface of the metal to a dispensing point and a pulse generator generates pulses in exact proportion to the displacement of the pump and delivers such pulses to counters, the counters being started in operation when the metal being pumped contacts a probe at the dispensing point, the counters stopping the pump when an exact amount of displacement of the pump has occurred. Rate multipliers are provided between the pulse generator and the counters to compensate for leakage in the pump, variations in volume delivered for a given displacement of the pump or other unanticipated variables.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: November 2, 1982
    Assignee: Lester Engineering Company
    Inventor: Al Ansorge