| 摘要 |
345,769. Roll-film cameras. THORNTON PICKARD MANUFACTURING CO., Ltd., PICKARD, A. G., and SLINGER, F., Altrincham, Cheshire. Feb. 17, 1930, No. 5190. [Class 98 (i).) The removable spool or roll-film carrier frame for cameras of the box type is fitted with two hinged or pivoted flaps B, Fig. 5, for varying the focal plane area used. The flaps may be independently adjusted by hand, or, as illustrated, mounted on shafts a connected by links c to a rod C. This rod has a pin E, which, when the frame A is inserted into the camera, is engaged by a fork G, Fig. 6, pivoted on the camera case D, and provided with an external adjusting knob d. |
