Patent GB-936568-A (GB)
Title: Photographic camera
IPC: G03B7/12
Filed: 1962-04-24
Abstract: 936,568. Photographic cameras. AGFA A.G. April 24, 1962 [April 29, 1961; Sept. 22, 1961], No. 15651/62. Class 98 (1). The camera has an automatic exposure control, a shutter release, a general camera release for operating both and a delayed action mechanism for delaying the shutter release after actuation of the camera release to operate the exposure control, the delayed action mechanism having setting means whereby it can be rendered operative or inoperative as desired. In the camera of Fig. 1, depression of a camera release rod 12 frees a spring-loaded member 9 which explores the needle 10 of the exposure meter and through a linkage 6, 7, means arm 5 to set the diaphragm aperture and shutter speed in lens housing 2. Further depression of release rod 12 causes an arm 16 thereon to press downwardly on a cam 21 so that, if the delayed action mechanism is inoperative, the shutter release arm 4 is immediately moved to release position. This delayed action mechanism includes a spindle 20, movable in a slot 22 and carrying the cam 21, a cam 25 for freeing a camera release latch 41 after an exposure, and a gear 26 which supports a lever 27 and meshes with an escapement mechanism of which the escapement 35 is pivoted on a lever 37, itself pivoted at 36 and having a bent-over end 38. This mechanism is brought into use by rotating lever 27 counterclockwise to the position shown whereby it is pressed against the end 38 of lever 37 so as to lift the escapement 35 from wheel 34. If, now, the camera release rod 12 is depressed, the exploring member 9 is released as before and the cam 21 is brought by movement of spindle 20 in the slot 22 into the range of shutter release arm 4. The lever 27 now rotates clockwise through 90 degrees, under spring loading 28 and at a rate controlled by the escapement mechanism until the high point of cam 21 operates the shutter release arm 4. In another form, Fig. 2, depression of the camera release 104 frees arm 106, to explore exposure meter needle 103 and set the exposure value at 108, 108a, and causes a spring-loaded sleeve 110 to move downwardly whereby an arm 110a thereof contacts shutter release trigger 14. Another arm 110b of sleeve 110 rides on a delayed action setting cam 114 which is shown in its operative position. This cam has teeth 114d meshing with the gear train of an escapement mechanism and a pin 114c for co-operation with a spring-loaded latch 122. When in the position shown, cam 114 prevents downward movement of sleeve 110 to release the shutter trigger until the delayed action mechanism has run down. When this occurs, arm 110b moves into the recess 1146 and spring 120 is released from pin 114c so that it can release the latch 122. If the delayed action mechanism is not set, arm 110b can move into the recess 114b so that arm 110a will operate the shutter trigger immediately the release rod 104 is depressed. In another modification, Fig. 3 (not shown), the camera release arm is pivoted coaxially with the shutter release arm and the catch is caused to follow the movement of the camera release to operate the shutter trigger. When the delayed action mechanism is in use, such follow-up movement is temporarily arrested by engagement of a lug on the shutter release arm with a cam on the setting lever of the delayed action mechanism, or, as in Fig. 4 (not shown), by engagement of a pin on the shutter release arm with a pivoted lever connected to the delayed action setting lever so as to be moved out of the path of the pin when the delayed action mechanism runs down. The two release arms may be slidable in pin-and-slot guides, Fig. 5 (not shown).