Patent GB-401543-A (GB)
Title: Improvements in or relating to photographic cameras
IPC: G03B19/02
Filed: 1933-02-16
Abstract: 401,543. Photographic cameras. RIXEN, C. J., 2, Vester Voldgade, Copenhagen. Feb. 16, 1933, No. 4769. Convention date, Aug. 9, 1932. [Classes 97 (i) and 98 (i).] A photographic camera for the exposure of several photographs on one and the same plate is characterised by the combination of a holder for the plate, the holder being adapted to displace the plate in its own plane, and a tube or the like containing the lens, the tube being adapted to move to and from the surface of the plate in such a manner that the inner end of the tube rests against the plate when exposed, and is apart therefrom when the plate is moving. As shown in Figs. 1 and 2, to the wall of the camera box 1 is attached a metal body with a circular bore in which moves a tube 4 supporting at one end the lens 5 and encircling at the other a tube 6. A pin 7 on the tube 4 moves in a slot 8 in the metal body 9, which has four lugs 10 for attachment to the box 9 and four lugs 11 to which are attached two parallel rails 12 forming guides for two other rails 13 interconnected by two rails 14 to form guides for the frame 15. The rails 13 have rack-teeth with which the toothed segment 16 attached to the wheel 18 on the hub 17 is adapted to engage. The wheel 18 has twelve pins 19 on one side and a pin 20 on the other. On the shaft 21 are disposed four rigidly interconnected members 22, 23, 24 and 25. The member 22 is a bevel-gear engaging another bevel-gear 26 movable by the crank handle 28, while the gear member 23 engages another gear 29. The member 24 has on one side two face cams 30 engaging the pin 7 to reciprocate the lens tube 4, and on the other a circular flange 31 able to encircle three of the pins 19 on the wheel 18, and having four recesses 32. The member 25 has two gear-teeth 33 and a cam portion 34. The gear 29 is on a shaft 35 carrying a disc shutter 36 having an aperture 37 moving past the aperture 38 in a disc 39 between which and the lens tube 4 is a spring 40 pressing the disc 39 against the disc 36 and causing the pin 7 to press against the cams 30. Sliding in guides 41 on the rail 12 under pressure of a spring 44 and controlled by a pin 45 engaging the cam 34 is a pawl 42 engaging notches 43 in the rail 13. Pawls 48, 49 on the rails 14 engage notches 46, 47, under pressure of springs 54 to hold the frame 15, which also has two rows of cams 50, 51. The pawls 48, 49 are rigidly connected to arms 52, 53 adapted to contact with the pin 20 when the frame 15 is in an extreme position. On the left rail 14 is a lever with arms 55, 56, the arm 55 resting on the pawl 48 while 56 successively contacts with the cams 50. The slide-cover 59 is long enough to project outside the box 1. The frame 15 has a tappet 61 aligning with the pin 62 with the frame 15 in lowermost position. A sliding rod 64 aligning with the frame 15 is provided in the bottom of the box 1. Fitting into the opposite end of the tube 4 to the lens 5 is a tube 6 having a pin 65, Fig. 3, engaging recesses 66 of various depths in the tube 4 for focusing purposes. Rotation of the crankhandle 28 effects stepwise movement of the frame 15 with exposure through the aperture 37 in the shutter 36 at each step, the spring 40 being allowed by release of the pin 7 by the cams 30 to press the tube 6 against the plate. The engagement of the pawl 42 with the notches 43 determines the motion in each step. At the end of a horizontal movement the pin 20 engages either the pawl 48 or 49 to free the frame 15, and then moves down the frame by engagement with one of the cams 50, 51. When the frame 15 reaches its lowermost position the tappet 61 forces the rod 62 into the path of the handle 28 and stops the motion.