Patent GB-920262-A (GB)
Title: Improvements in winding and operating means for photographic cameras
IPC: G03B17/42
Filed: 1959-12-14
Abstract: 920,262. Photographic cameras. R. GRUTER, W. MEIXER, and A. NOLTE, [trading as BALDA-KAMERAWERK R. GRUTER KOMM.-GES.]. Dec. 14, 1959 [Dec. 27, 1958], No. 42358/59. Class 98 (1). A photographic camera has a spool-winding means, an electric motor, a winding drive mechanism between the motor and winding means, a mechanical hand-operable shutter release means, a mechanically operated connection between the motor and the release means for actuating the latter by the motor and electric contact means operated partly by hand and partly by the motor through said connection whereby exposure-actuation as well as rewinding of the camera can take place selectively either mechanically only by hand or electrically by actuating a contact for the electric motor. In the embodiment shown in Fig. 3 the control device is initially in position shown in the Figure with electrical contacts 40, 59 and 39, 58 closed. When the release button on camera is manually operated, rods 25, 24 are moved downwards which cause a lever 34 to rotate about a pivot 31 to close contacts 33 and move contact 36 further from contact 39. The motor 8 is thus started and causes cam 45 to rotate anticlockwise thereby moving rod 15 to the left so that a nosepiece 21 thereon passes over a nosepiece 22 on lever 22 (see dotted position). On releasing rod 25 and closing the shutter the nose 22 engages nosepiece 21 and holds lever 15 fast and simultaneously projection 37 engages cam 60 which causes contacts 36, 39 and 40, 58 to close and thereby reversing the motor current and the direction of rotation of disc 45 so that spring 16 can pull rod 15 to the right and surface 47 moves it laterally so that nosepieces 22, 21 no longer engage. The motor is driven in a reversed direction until projection 62 engages notch 49. During this movement this film is wound on. By closing a remotely controlled switch 63 or by holding the release rod down a series of photographs may be taken. In the embodiment shown in Fig. 4 fingers on strip 74, 73 can move on a metal strip 71 on a rotatable cam 67. In the initial position strip 74 is on an insulated part 72 of the cam. On operating the release knob 79 electrical contacts 77 are closed, the motor is started and cam 67 rotates anticlockwise which (a) releases strips 73, 74 (b) causes rod 65 to be released so that spring 64 can move it to the right so that it engages a nosepiece 80 on a release extension rod 68 and 78 is freed to open the contact 75a, 74a and stop the motor. A projection 81 on rod 65 is engaged by a bolt 82 until the shutter is closed. After a while a projection 84 on rod 65 engages spring contact 74 to close contacts 75a, 74a and restarts the motor. The rod 65 is then moved to the right by the next curved part of cam 67. The strip 73 then slides on to the cam and connection 73, 85 is closed. 85 is electrically connected to 74 which removes the necessity of 77 being closed. The cam 67 then rotates until it is in its initial position. A remotely controlled contact 76 enables a series of photographs to be taken. If the end 66 of rod 65 is made conducting, strip contact 74 may be dispensed with. The arrangement may be such that the rod 65 is parallel to the spring contacts 73, 74 (Fig. 9, not shown).