秤台衡器的首次改进出现在1855年,弗兰克·M·斯通及托马斯·罗斯设计滚球轴承,并且申请了专利。在此发明之前,秤台上的锋利枢轴由于重复使用受到磨损,从而导致衡器随着时间的推移精度降低。滚球轴承结构为枢轴提供减震器,用于减少衡器上的应力,并且提高其精度。1857年,小约翰·豪购买斯通及罗斯的专利,并且通过豪衡器公司生产具有这种专利结构的衡 The first improvement to the weighing platform appeared in 1855 when Frank M. Stone and Thomas Rose designed ball bearings and patented. Prior to this invention, the sharp pivot on the weighing platform was worn out due to repeated use, resulting in reduced accuracy of the scale over time. Ball bearing structure for the pivot to provide shock absorbers, used to reduce the stress on the weighing instrument, and improve its accuracy. In 1857, John Howe purchased the patents of Stone and Rose and produced the balance of this patented structure