| 摘要 |
<p>Appts. for use in the control of a mixing system, e.g. controlling the rate of flow of resin and additives by the counting of pulses representative of flow of the components is designed to multiply a predetermined number of pulses by a frequency function, and comprises a timer for defining a predetermined time interval, a sampling device responsive to an input frequency for determining the number of pulses appearing at this input frequency during the pretermined interval, and a multiplying device giving the product of the number of input frequency pulses and the predetermined number of pulses.</p> |
