Patent GB-1152085-A (GB)
Title: Event Recorder and Web Take-up Apparatus
IPC: G06K1/10
Filed: 1966-08-18
Abstract: 1,152,085. Selective punching. COMMONWEALTH SCIENTIFIC & INDUSTRIAL RESEARCH ORGANISATION and H. R. MORTLEY. 18 Aug., 1966 [23 Aug., 1965(2)], No. 37138/66. Heading B4B. [Also in Divisions G4 and G5] An event recorder includes a first punch which punches sprocket holes in a tape, the punch being interconnected with the tape feed arrangements so that the tape advances by a fixed distance after each punch operation, and a second punch, aligned with the first transversely relative to the direction of tape feed, which punches information holes in the tape. The second punch is interconnected with the first so that the first is operated simultaneously with it. The first punch is also operated independently at the ends of predetermined time intervals so that sprocket holes with no information holes adjacent are punched to provide a timing record. General (Fig. 1).-The tape 28 is fed from a spool 27 via guide rollers 38, 39 to a punch head 41 where sprocket holes are punched at fixed intervals, and information holes together with sprocket holes may be punched when required. The tape is moved by a toothed feed roller, which engages sprocket holes punched at the head, via a tensioning system 98 and further guide rollers 124, 125, 126 to a take up spool 192. Punch head and tape feed (Fig. 3, 4 and 5).- The punch incorporates notched plates 42 which hold vertical die plates 43, 44. Rearwardly extending bars 48 are mounted in grooves in the die plate faces, which are spaced apart by shims 47, so that between the bars is a narrow gap through which the tape passes. Four punches 51-54 register with holes in the die plates, being mounted in the side plates 49, and are operated by the solenoids, 61 63, 71, 71 being the sprocket hole punching solenoid. Punch 54 is manually actuable by a lever 65. Mounted between the plates 42 rearwardly of the punches is a toothed sprocket roller 97 (Fig. 5). This is operated through a ratchet 84 to move the tape in synchronism with the operation of the sprocket solenoid by the rod 92 (Fig. 3) and member 85 journalled into the shaft of the roller 79. The rod 92 is moved by an arm 77 actuated by the solenoid 71. Prior to this movement the tape is held stationary by an indexing device 80 engaging the lower end of the roller shaft, to ensure the movement of the tape in exact increments. Uniform tension is maintained by passing the tape round a peg 102 which is mounted on a spring loaded plunger 93 via further spring loading 101. As the tape is moved intermittently forward by the sprocket drive the slack is taken up by the movement of the spring loaded plunger 93 &c. As the plunger moves back, the arm 108 is rotated so as to release the spring loaded pawl arm 105 into engagement with the ratchet 103, which is coupled to the tape take up spool. When next the arm 77 moves forward at a punching operation, the arm 105 causes the take-up spool to rotate. The take-up of tape draws the plunger 93 forward again and the system returns to its original position. Control system.-The system is controlled by a clock 142 which every 6 minutes operates the switch 143 (Fig. 14) to momentarily connect the capacitor 144, changed to the potential of battery 132 to SCR 154, thereby energizing the solenoid 71 to punch a sprocket hole. If terminals 162, 161 are bridged, both SCR's 145, 155 are fired to cause simultaneous operation of solenoids 71 and 61. Bridging of 162 with other terminals 160, 159 causes other operating patterns. The contacts 153 and 158 are opened by the movement of the lever arm 77 associated with solenoid 71 to prevent further punching until the tape has been advanced When used in association with a tilting bucket rain gauge, the gauge contacts, which close after each fall of one point of rain, are connected across 162 and 161. The number of points falling in any six minute period will be indicated by the number of accompanied sprocket holes lying between unaccompanied holes. Closing contacts across the other terminals enable further data, or the sign of the first variable, e.g. water level changes, to be recorded.