| 摘要 |
A drawing device for reproduction of divergent cubic parabolas comprises a lever, whose first arm is connected by the first dyad of slides to a beam and a vertical guide mounted by means of the first T-shaped slide with a stop on a fixed horizontal ruler, on which a lever is articulated, whose second arm by the second dyad of slides is connected to the beam, third dyad of slide and second T-shaped slide with a stop, has a horizontal guide mounted with possibility of vertical movement, and an additional beam. The lever comprises a third arm that by third dyad of slides is connected to the additional beam, which by the second T-shaped slide with stop is connected to a horizontal guide installed in the second dyad of slides. |
