| 摘要 |
This is related with an acoustic depth-finder and a fish finder. This is composed of a pen(5) which moves to the direction of the width of paper(7) fixed on a stepless belt(1), a circuit which supplies a pen with the record singnal during the movement of a pen from the first column to another, a single stability circuit(11) which is operated by the waves of a pulse circuit generating pulse output during the said motion of a pen and measures how long it will take a pen to return to the first column, a pulse motor which is operated by pulse heat and moves the paper, a drive pulse generation circuit(15), and a gate circuit(13) which supply a pulse motor with the output of pulse heat.
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