Patent GB-841047-A (GB)
Title: Improvements in or relating to a device for displaying coded information
IPC: G03B27/465
Filed: 1956-05-11
Abstract: 841,047. Coded data, display devices for photographic recordings. EASTMAN KODAK CO. May 11, 1956 [May 13, 1955], No. 14819/56. Class 98(1) In a device for displaying coded data for photographic purposes, a pattern of light corresponding to coded data respecting characters and arranged in successive lines on an information bearing medium is formed by means of a plate provided with an elongated aperture, means arranged on one side of the plate for illuminating the aperture, a number of shutter members arranged side-by-side adjacent to the aperture for preventing transmission of light through the aperture, each shutter member being associated with a coded data position on the information bearing medium, actuating means connected to each shutter member for moving the shutter member to a position in which the portion of the aperture normally obstructed thereby is free to transmit light, means for sensing the successive lines of coded data on the information bearing medium, and means responsive to the sensing means for rendering simultaneously operative the actuating means associated with the shutter members corresponding to the sensed coded data positions in each line. The information bearing medium may consist of punched tape, magnetic tape, punched cards or the like. As shown in Fig. 7, the tape 28 has holes 80 for engaging a driving sprocket, and apertures 81 formed transversally of the tape in positions which vary according to the character to be incoded. Thus, each character can be represented by a seven element code. The display device comprises a box like structure 30, Fig. 4, having mounted therein an elongated plate 31 with an elongated aperture 32 formed therein. The slot is illuminated by a lamp 33 and a condenser lens 38. Light from the slot emerges through an opening 36 in the wall 30 of the display device, and is reflected by a mirror 24 to e.g. the optical system of a photographic recording aperture such as is described in Specification 841,046. The slot 32 may be blocked a number of pins 39 (see also Fig. 6) which are arranged side-by-side and are mounted on arms 40. As shown in Figs. 4 and 5 the arms 40 extend alternately in opposite directions and. are pivoted on rods 41, 42. Each arm 40 is held in its lowermost position against action of the spring 51 by a latch member 43 pivoted on a rod 47. Each arm 43 is connected by a link 67 to the armature 64 of a solenoid 62. The solenoids 62 are mounted on bracket 63, which also carry the pivots 65 for the armature 64. When a solenoid 62 is actuated, the corresponding lever 43 is rocked backward against action of the spring 48 until it reaches the end of a slot 70 in a plate 68. As soon as the arm 43 is disengaged, the arm 40 is rocked upwards by the spring 51 and the pin 39 is removed from the vincinity of the slot 32. A slot plate 73 extends completely through the device, and is fixed at its extremities outside the walls 53, 54 to armatures 74, 75 of solenoids 76, 77 respectively the plate 73 serves as a stop to limit the movement of upward movement or arms 40 and also serves to reset all the arms 40 after the pattern of light has been completed, upon energization of solenoids 76, 77. The sensing means for the tape 28 consist of a number of normally open contacts, which are moved to a closed position whenever an aperture 81 is sensed. The contacts are connected in a relay circuit, Figs. 9a to 9c (not shown), which control the operation of the pins 39 and also control the camera and a tape typewriter. When the tape has been correctly positioned and started, and the first line of coded data is sensed, the closure of selected contacts causes the printing of a character in the typewriter, and the energization of selected solnoid 62 to remove from the vincinity of the slot 32 those pins of the first fixed pins 39 which correspond to the coded character. The next line of coded data on the tape 28 causes the printing of the next character, and also actuates the corresponding pins in the next six pins 39. This continues until all the pins 39 (of which there may be seven sets of six) have been neutralized. At this point, no further action can take place until the camera has been operated to photograph the light pattern presented at the slot 32. When this has been accomplished, the solenoids 76, 77 are energized, and the arms 40 are re-set the process is repeated, the coded data being displayed lineby-line at the slot 32 and photographed. When the last character is reached, a special signal on the tape 28 stops the actuation of pins 39, causes the photographing of the last line or part of the line, and prepares the photographic recording apparatus for its next operation. Specification 750,454 also is referred to.