Patent GB-1105343-A (GB)
Title: Improvements in or relating to photographic film cameras
IPC: G03B27/46
Filed: 1963-10-28
Abstract: 1,105,343. Photographic cameras. MAGNAFONE RECORDER CO. Ltd. W.F.J. KING and J. SMITH. Jan.28, 1965 [Oct.28, 1963], No.41561/63. Heading G2A. In a photographic camera in which the shutter 55 is operable only when a cover has been secured in light tight manner over a film loading opening and film traversing mechanism has brought an unexposed portion of the film 21 into register with an aperture 31, a microswitch (73) Fig. 4 (not shown) is open when the cover (63) is not in position, hence the solenoid 53 is not energized and rollers 28, 29 are spaced apart thus facilitating the threading of the film from a spool on a holder 19 through a gate 27 to a spool on a holder 20. The cover plate (63) is then placed in position and a bore in a screw (64) (Fig.4) thereon engages a threaded post 65, the plate swinging levers 37, 35 downwardly so as to press a pad 33 against film passing through the gate. Movement of the lever 35 causes a contact 44 to take up a position opposite a contact 45, the film being therebetween. The screw (64) is then screwed on to the post 65 thus clamping the cover in a light tight manner over casing 18 and operating the microswitch (73) to activate the solenoid 53 to bring the rollers 29, 28 together. Film Feed Mechanism. A lever (97) Fig. 3 (not shown) is moved to the solid line position of Fig. 3 so as to bring a member (77) opposite an aperture in the cover plate into which aperture the member (77) is screwed. This rotates a cam 78 which operates a microswitch 84 connected in circuit with a rotary solenoid 47 coaxial with the roller 28. Each operation of the microswitch 84 steps the film 21 forward so as to feed all the film exposed during loading through the gate 27. After a predetermined number of rotations of the cam 78, microswitches (87), (88) Fig.5 (not shown) are operated. The microswitch (88) is connected with a shutter operating solenoid 59 and the shutter thus made operable. The microswitch (87) is connected in a circuit with a microswitch (13) Fig.1 (not shown) so that upon operation of the switch (87), operation of the switch (13) is effective in operating the camera. The whole camera is now ready for use. Photo-copying apparatus. A document to be copied is laid face down against a window (11) (Fig.1) of a cabinet (10) which has the camera (14) mounted in one wall, which window is pressed down to close the microswitch (13) which operates a change over relay (not shown) to energize the solenoid 59 to open the shutter 55. As the shutter opens microswitches 62, 62a are operated successively to respectively set off a flash device (17) (Fig.1) and energize the solenoid 47 so as to move the film on a step, the image of the document being transmitted by mirrors (16), (15), 54 to the film 21. When the film is completely used up, the contacts 44, 45 close and illuminate a warning lamp on the apparatus. To remove the film from the camera the member (77) is first unscrewed thus operating the microswitch 84 so that any film lying between the gate and the take up spool is fed into the take up spool so that when the cover plate is eventually removed by unscrewing the clamping knob (66) there is no danger of exposed film becoming fogged. A device is provided to prevent clamping on the cover when the apparatus is not connected to a source of electric current, since if the cover were to be clamped on, film exposed during loading would not have been passed through the gate due to non-rotation of the solenoid 47.