| 摘要 |
346,873. Window wedges. STANLEY, J. M., 41, Mayville Road, Leytonstone, London. Jan. 27, 1930. No. 2733. [Class 89 (ii).] A window wedge is formed as a tapered semicircular member a, serrated along the wedge face b, and has a central boss e adapted to take a pivot pin. At one end of the wedge is a projection c for moving it into and out of action. For locking the wedge, a spring- pressed ball h is provided. |
