| 摘要 |
A stepping motor is disclosed for use in imparting to a rotatable member an intermittent step-by-step rotating motion by means of a linearly reciprocating driving member. The driven, rotatable member has a shaft which carries a ratchet wheel and is advanced intermittently by two oppositely positioned pawls, mounted on a reciprocating driving member so that both movements of the driver will rotate the driven member another step. Means are also provided for preventing undesirable rotation of the ratchet, not only in the drive direction thereof, but also in the reverse direction, and may include a stop block cooperating with each pawl or a second ratchet wheel cooperating with other stop members. Furthermore, novel means for reciprocating the driver which may include electrical, pneumatic or mechanical means or a combination thereof is also disclosed.
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