| 摘要 |
946,438. Photo-electric exposure control. P.GROSSEN & CO. G.m.b.H. June 1,1960 [June 2, 1959], No. 19378/60. Heading G2A. The pointer of an exposure meter in a camera arrests a cam plate which in turn arrests a scanning pointer controlling the position of an aperture setting ring. When the camera release 32, Fig. 1, is pressed, the plate 27 moves until its edge 27a engages the pointer of an exposure meter 2. Further pressing results in compression of the weak spring 38 and the rotation of a lever 18 to free a pawl 16 which is rotated by a spring 17. Pawl 16 is connected through gears 12, 14 to the scanning pointer 13 which rotates freely about a shaft 3 until engaging edge 27a. Further movement of the release actuates a lever 22 to free the ring 20 which rotates until the racket 24 engages pawl 16. The angular position of meter 2 is adjusted through shaft 3 in accordance with exposure time and film sensitivity set on rings 11 and 6 respectively. In a modification, Fig. 4, the release 32 is perpendicular to the lens axis and the ring 52 is directly coupled to pointer 13 through bevel gears 49, 50. When ring 52 stops, a ring 51 continues to rotate under the action of a spring 64 until the lug 53 releases the shutter. |
