NASA NTRS · 19670000284
Vibrator elapsed time is automatically controlled
Abstract
Circuit determines elapsed operating time for vibrators when three vibrators are located in one room and are powered by two amplifiers through either of two control systems. It operates the control system elapsed time clocks only when voltage is applied to the vibrator armatures.
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Burowick, E. A.. 1967-08-01. Vibrator elapsed time is automatically controlled. https://ntrs.nasa.gov/citations/19670000284
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