| 摘要 |
The printer has a set of needles (1) attached to a support (2) at one end, each comprising an electrical conductor formed in two symmetrical parts angled in opposite directions relative to the straight line between the two ends of the needle. The needle is connected at opposite ends of the angled central part to opposite poles of a current source (8,9). The needle (1) is acted on by a magnetic field provided by a permanent magnet (7) which exerts a force tending to straighten it when a current is passed through it, to effect printing. - The current source (8,9) pref. comprises a pulse generator (8) coupled to the primary winding of a transformer (9) which has a secondary winding connected across the needle (1).
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