| 摘要 |
1,087,190. Camera cassettes. PENTACON DRESDEN VEB. Nov.3, 1965, No.46531/65. Heading G2A. A cassette (11) Fig. 2 (not shown) (e.g. for cinematographic film) has a contact strip (12a, 12d) whose position is indicative of an exposure factor such as film speed, or the filter factor. When it is inserted into the camera housing Fig. 1 and is correctly located by engagement of stops (12b, 12c) on the cassette with stops 8b, 8c on the camera, the strip (12a, 12d) makes contact from a common contact bar 8a to one of a number of contacts 9. Each of the contacts 9 is in series with a resistance 10 in the energizing circuit of a photo-electric cell 6 which controls the lens diaphragm 3, a measuring instrument 5 also being in the circuit. The resistances 10 are all of different magnitudes, so that insertion of the cassette into the camera completes the photo-cell circuit through a particular resistance which adapts the cell to the film speed, according to the position of the strip (12a, 12d). The dashed lines show alternative positions for other film speeds.
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