Patents Represented by Attorney Joseph J. Kaliko

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  • High speed accurate low frequency counter
    Patent number: 4027146
    Abstract: A frequency counter is disclosed which determines the frequency of an input signal in a high speed and accurate manner. High speed is achieved by utilizing electronic digital processing circuitry. The high degree of accuracy is achieved by a combination of elements which perform period averaging of an integral number of periods of the input signal over a flexible measurement interval. The counter is particularly useful in accurately measuring low frequency signals.
    Type: Grant
    Filed: March 23, 1976
    Date of Patent: May 31, 1977
    Assignee: Heath Company
    Inventor: Charles Minot Gilmore
  • Motor speed control circuit
    Patent number: 4011491
    Abstract: A speed-controlling circuit for controlling the rotational speed of a D.C. electric motor in which the electric current is supplied to the D.C. motor through a switching circuit which is periodically open for a predetermined fixed time interval. The switching circuit is controlled by electrical pulses having a repetition rate which varies in dependence upon the rotational speed of the motor, whereby to periodically interrupt the supply of current to the motor.
    Type: Grant
    Filed: March 21, 1975
    Date of Patent: March 8, 1977
    Assignee: Heath Company
    Inventors: Lawrence L. Grover, David L. Plangger