| 摘要 |
374,786. Optical-projection apparatus. I. G. FARBENINDUSTRIE AKT.-GES., Frankfort-on-Main, Germany. Dec. 12, 1931, No. 34524. Convention date, Dec. 23, 1930. [Class 97 (i).] The filaments 4 of a lamp 3 in a kinematograph projector are adjusted into position such that their images, formed by a fixed mirror 5, lie between them, by tilting the lamp bulb about its socket, the holder being fixed. The bulb may be moved by a set-screw 6 against the action of a spring 9, or, as shown, by two relatively inclined set-screws, lock-nuts 8 being provided on the set-screws. |
