Patents Assigned to Metrotech, Inc.
  • Apparatus including a pair of automatic gain controlled amplifiers for determining the lateral direction to a concealed conductive object
    Patent number: 4520317
    Abstract: An apparatus to measure the distance to a concealed conductive object, radiating an electromagnetic signal, has two sensors, each adapted to receive the signal and to produce an output voltage proportional to the amount of signal received. Amplifier means amplify the output voltage. Automatic gain control means automatically controls the gain to the amplifier means such that the gain of the amplification of one of the output voltages is the same as the gain of the amplification of the other output voltage. Computing means calculate the distance based upon the two amplified output voltages. Display means display the calculated value.
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: May 28, 1985
    Assignee: Metrotech, Inc.
    Inventor: Earl J. Peterman
  • Apparatus for determining the distance to a concealed conductive object which is radiating an alternating current signal
    Patent number: 4387340
    Abstract: An apparatus to measure the distance to a concealed conductive object, radiating an electromagnetic signal, has two sensors, each adapted to receive the signal and to produce an output voltage proportional to the amount of signal received. Amplifier means amplify the output voltage. Automatic gain control means automatically controls the gain to the amplifier means such that the gain of the amplification of one of the output voltages is the same as the gain of the amplification of the other output voltage. Computing means calculate the distance based upon the two amplified output voltages. Display means display the calculated value.
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: June 7, 1983
    Assignee: Metrotech, Inc.
    Inventor: Earl J. Peterman