| 摘要 |
PURPOSE:To improve response performance by inserting a d.c. voltage controlling circuit for feeding a high d.c. voltage on starting of electric conduction and for feeding the rated voltage, subsequently, between a d.c. power source and the solenoid of an electromagnetic slector valve. CONSTITUTION:When a starting switch 2 is closed, the second timer is driven, keeping each contact point 4-1, 4-2 of the second timer in ON state, and then the first timer 3 is driven to close the contact point 3-1. Therefore, the solenoid 5 of a d.c.-type electromagnetic selector valve is applied with the voltage twice as large as the rated voltage during a short time restricted by the first timer 3. when the first timer 3 stops, the contact point 3-1 opens, and the rated voltage is supplied into the solenoid 5 from a (b) terminal. |
