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| Automatic Sequence Switchers |
| A system is provided for automatically controlling the number and sequence of operation of a plurality of motive devices such as pump motors in a common pumping system. The flow rate of a pumped liquid or other medium is monitored by a flow meter which generates a frequency output related to the flow rate. The flow meter output is converted to digital form to drive a counter having an output to a storage register. Timing controls operate the counter, storage register and logic gates receiving the output of the storage register and these in turn operate the motors controlling both the sequence of their operation and number in operation according to demand requirements as monitored by the flow meter. Switching means are provided to automatically by-pass disabled equipment and cyclically to vary the operating sequence so as to distribute uniformally use of the motors, pumps and the like.
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