Patent GB-190018007-A (GB)
Title: Improvements in or relating to Photographic Cameras.
Filed: 1900-10-10
Granted: 1901-08-24
Abstract: 18,007. Kodak (Limited), [Brownell, F. A.]. Oct. 10. Cameras; lens fittings.-Relates mainly to folding-cameras in which the lens is adjusted upon the door 2, Fig. 1, hinged at 5 to the frame 1. The lens frame 40, Fig. 2, is adjustable vertically upon the uprights 42 by spring thumb-catches 67, 68 engaging with the annular grooves 65. The lens may be placed in a central position by placing the lower ends of the springs in the notches 69. The uprights 42 are carried by a slotted plate 45, which may be adjusted laterally on the carriage 29. The plate 45 is clamped by a grooved cam plate 54, which may be rotated slightly between the grooved head 50 of a pin 49 and a fixed plate 53. The cam plate 51 is rotated by a spring lever 56 with a thumb-piece at 58. The carriage 29 slides longitudinally on the plates 27, 28, fixed together, and is clamped in position thereon by cam plates 60 on the pin 49 in a similar way to the plate 45. The cam plates have thumb -pieces, and act to press down the block 63 on the plate 28. The plates 27, 28 slide between flanges on the plate 28. The plates 27, 28 slide between flanges on the way 14, which itself can be adjusted between flanged plates 13, fixed to the base 2, by a rack and a pinion 16 on a spindle with a milled head 18. A tubular screw with a milled head 23 clamps the way 14. Thus, by using all the slides, the lens can be advanced about three times the length of the base 2. The slide 27, Fig 6, has slots 131, 31* at its ends for a spring catch 36 fixed to the way 14. The catch prevents the slide 27 from moving on the way 14 until the carriage 29 has reached the end of the slide so as to depress the catch. The carriage engages a flange 32 on one end of the slide ; at the other end the flange is replaced by a spring latch, which is liberated when the latch strikes a fixed pin 36*, and thus allows the carriage to pass on to the supplementary way 31, Fig. 1, within the frame 1. The frame 1 is connected to the swing back 3 so that the swing back may be drawn out and tilted as required. This is done by segmental plates 75, 77 which have a sliding engagement. The centre of these plates lies on the surface of the focussing screen 105 and the sensitive film. The plate 75 is fixed to the back 3, and the plate 77 has flanges engaging with grooves 79 and is slotted for the screw 81. The plates are clamped together by screws 86 with thumb-pieces outside the back 3. The screws 86 pass through the plates and slotted links 83. The reversible rear frame 90 is fixed to the swing back 3 by hooked catches at the corners of a sliding frame 94, operated by a spring and by the pivoted thumb lever 100. The frame 90 is guided in place by lugs 96. The frame 104, Figs. 1 and 16, carrying the focussing-screen 105 is removably connected to the hinged bars 107 by pins 106 engaging in notches. The bars 107 are pivoted at 108 to the frame 110 and urged inwards by springs 109. The frame is notched at 111 so that the pins 106 may be readily slipped into place. Fig. 16 shows the plate holder P inserted between the swing back and the screen. The screen carries a spring-hinged folding hood 117, 113 to take the place of a focussing-cloth. A finder 121, Fig. 2, is pivoted at 122, and held by a spring 126 so that it may be turned into the position shown in dotted lines, in which the opening lies at the top.