Patents Assigned to Power Instruments, Inc.
  • Digital stroboscope-tachometer
    Patent number: 4117395
    Abstract: A stroboscope which generates high intensity light flashes may be manually adjusted to the speed of a rotating object and provides an indication of the speed of the rotating object in revolutions per minute. Connection of an external synchronizing unit into the stroboscope automatically disables the manually-controlled oscillator and substitutes synchronizing control pulses derived from a rotating object which is to be synchronized, these control pulses occurring at a frequency which is sixty times the frequency of the rotating object.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: September 26, 1978
    Assignee: Power Instruments, Inc.
    Inventor: Robert H. Redfield