| 摘要 |
<p>A double-lever hammer operating according to the inertia principle--at the end of a first lever operated as an armature lies the fulcrum of a second lever, and when the first lever hits a stop, the inertial forces encountered cause the upper lever arm of the second lever, carrying the print head, to be moved increased velocity in the direction of the record carrier; and a double-lever hammer operating operated as an armature lies the fulcrum of a second lever, and when the first lever hits a stop, the second lever is of the lever ratio, the upper lever arm of the second lever, carrying the print head, moves at increased velocity in the direction of the record carrier.</p> |
