| 摘要 |
1,138,328. Rocking chairs. AMERICAN METAL PRODUCTS CO. 6 Sept., 1966, No. 39692/66. Heading A4J. In a chair rocking mechanism, the rocking pivots 16 are positioned towards the rear of plate members 8 and 14, which they interconnect, and the rocking action is controlled by springs 29, which are effective both in tension and compression. A further compression spring 32 is adjustable by means of a wing-nut 34, to vary the resistance to rocking. The plates are carried on a ball-race 9 for swivelling about the axis of vertical pivot 10. |
