Photographic cameras having built-in exposure meters
943,429. Photographic cameras. KAMERAUND KINOWERKE DRESDEN VEB. June 29, 1961, No. 23581/61. Heading G2A. A photographic camera has a built-in exposure meter, including a photo-electric cell, which is coupled with at least one exposure factor setting member, a detachable or hinged rear wall which on...
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Zusammenfassung: | 943,429. Photographic cameras. KAMERAUND KINOWERKE DRESDEN VEB. June 29, 1961, No. 23581/61. Heading G2A. A photographic camera has a built-in exposure meter, including a photo-electric cell, which is coupled with at least one exposure factor setting member, a detachable or hinged rear wall which on removal or hingeing open effects the rebore of a film sensitivity setting member which returns to an unset rest position, a switch in circuit with the photo-electric cell and a cam disc operatively connected with said film sensitivity setting member, said cam disc having a nose which, on return of said film sensitivity setting member into its rest position, actuates said switch. As shown, a spring urged follow-up pointer 6 is coupled to an exposure time setting number 3 and to a diaphragm setting member 35 by way of a pivoted lever 5, a nut 4 in screw threaded engagement with an axially movable and rotatable spindle 2, the nut being constrained to move only axially by a pin 25 engaging in a slot 24, a pinion 26 on the spindle 2 and a cam surface 27 on the member 35. In order that film sensitivities may be taken into account, the lever 5 is mounted on a slide 7 which adopts a position determined by the angular position of a cam disc 108, as set by a knob 33. The disc 108 is loaded by a spring 11 and connected to a pinion 9, the arrangement being such that upon opening or removing a rear wall 13, a member 14 is pivoted outwards by a spring 15, a spring catch 10 is removed from engagement with the pinion 9 and the pinion and disc 108 run down to their inoperative position determined by the engagement of a nose 108a with a stop 12 as shown in Fig. 2. In this inoperative position, a switch 45a is closed to short circuit the exposure meter moving coil 46. The meter pointer 36, as a result, moves out of the field of view of a window 34. |
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