| 摘要 |
699,487. Windows. YOUNG, W. Sept. 29, 1952 [Oct. 10, 1951], No. 23588/51. Class 20(iii) In a window having a counterbalancing spring wound and unwound by a, rod c formed with a scroll with which the nut to which one end of the spring is anchored engages, the rod, Fig. 1, on the casing e, f, Fig. 5, containing the nut and spring is secured to and depends substantially centrally from the bottom glazing channel b so that it not only actuates the counterbalance but also stabilizes or helps to guide the window during opening and closing. |
