| 摘要 |
<p>PURPOSE:To constitute a POS terminal with no need for special construction by giving a function of supervising the state of a meter to a meter side and by making a signal line serve for the driving line of a motor. CONSTITUTION:When contents read out by card reader 11 are correct, a permission signal is transmitted to motor 13 and gate 14 is opened to send a signal of cycle (f) from oscillator 15 to a receiver inside of an office. At this time, relay 18 is still open and the signal is under no influence of disturbance. With the relay closed, gasolene is supplied by motor 13. When the user after gasolene supply opens switch 22 of the nuzzle, its variation is detected by detector 23, thereby opening relay 18. Detector 24 also exercises a supervision over the operation state to prevent trouble due to an improper operation.</p> |
