| 摘要 |
329,286. Webb, H. R., and Webb, H. N. Feb. 5, 1929. Balancing-apparatus for adjustable suspension. -A balancing device for rising and falling bodies, of the kind comprising a spring or the like exerting a varying force and a cam compensating device adapted to produce equilibrium, is provided with an adjustable lever connection 9 between the spring and the cord 8. A pulley system of equal mechanical advantage may be substituted for the lever 5 connected to the cam 7. The movement of the cam is limited to 180‹. |
