Patent GB-790926-A (GB)
Title: Improvements in or relating to tape control for typographical line casting machines
IPC: B41B27/10
Filed: 1955-06-01
Abstract: 790,926. Type-bar-making machines. DOW JONES & CO., Inc. June 1, 1955 [June 2, 1954], No. 15707/55. Class 100(3) Driving-mechanism. A method of tape control for a typographical line-casting machine comprises punching two tapes in accordance with a predetermined code system to provide in each tape control perforations corresponding with only a portion of the matter to be cast in each of a plurality of lines, and controlling the operation of the line-casting machine at different times first by the perforations in one tape and then in the other in cyclic succession to set up and cast successive lines of matter to be printed. The invention is especially applicable to the printing of information regarding stock market transactions. A "standing' tape carries in the form of code perforations information available at the close of the previous day, and a "variable" tape carries information on the activities of stocks during the day, if any. Each tape has a line of central feed perforations and six code perforation positions. The tapes are fed through separate tape boxes 10, 16 in synchronism at first. The first signal on the standing tape is a line-feed signal, which is made and causes a line feed of a record strip in a telegraphic printer operating at the same time that the tape is being punched. The variable tape has no signial. Columns 2-6 'on both tapes are occupied by signal representing numerals making up a four figure code number for the stock. Columns 7 and 8 on the standing tape are blank, while the variable tape has an "accept" or "reject" signal, according to whether or not there is any current information on the stock in question. If there is a "reject" signal, the standing tape is fed rapidly without any effect on the line-casting machine 15 referred to as an "electrotypesetter" until at the end off the. stock information there is a "carriage return" signal. The effect of this, apart from the operation of thetelegraphic printer carriage during punching of the tape, is to begin the normal feed of both tapes for the next stock. If there is an "accept" signal, the standing tape will then be fed under the control of the typesetter and itself control the typesetter so that all the information on the stock will be composed. The "carriage return'' signal will then transfer control to the variable tape, and the information thereon on the same stock will be composed. The final line feed signal in the variable tape operates the elevator raising mechanism and returns the circuits to normal ready for the next stock. If the code number on the two tapes is not the same, the feed is stopped and a red lamp is lighted. The mechanism includes a continuously rotating shaft 37 carrying dams 38-40, and a slower shaft 44 carrying cams 52-56 and rotated for one revolution by the shaft 37 through a friction clutch when permitted by the release of a detent when a solenoid 51 is energized. The tape boxes 10, 16 are connected by multi-wire cables 11, 17 and relay systems 12, 18 to the electrotypesetter 15, so that the closing of the contacts in relays 12, 18 places the typesetter under the, control of the tape' box 10, 16 respectively. The tape boxes are also each connected by five wires to five solenoids controlling a contact "tree," constituting a decoder 21 or 25. The decoder 21 thus makes 'contact from a line 71 either to a line 87 to a relay 88 or to one of ten wires in a cable 69. The decoder 25 makes contact from positive supply either to line 78a, line 93 to a relay 92 or one of ten wires in the cable 69 and so to the corresponding contact in decoder 21. The cams 52-56 have respectively one, seven, four, four, one lobes. Each lobe of cam 53 causes a feed step of the tapes through lines 68, 67 by means of a switch arm 66, provided that a relay 74 is not energized. When the stock code numbers are analyzed, if they are the same on the two tapes, a circuit is completed from positive supply, 'through decoder 25, one of the wires in cable 69, decoder 21 switch arm 70, and relay 72 to negative supply. Energization of.relay-'72' breaks circuit to relay 74. Switch arm 70  is operated after the 2nd-5th operations of switch arm 66. If, however, the figures do not agree, relay 74 is energized when a switch arm 73 is operated by cam 55 (at the same time as switch arm 70 is operated), to break 'the circuit to switch arm 66 and stop the feed, also to light a red lamp 77. The operation of the machine is begun by opening switches 60, 61 to break certain holding circuits, including one for relay 74, and. closing starting switch 62, which, energizes a relay 91 and also the solenoid 51 so os to initiate a cycle of rotation of the shaft 44. Comparison of the code numbers follows as described above. If the variable tape then has a " reject " signal, circuit is made through switch arm 78 when the cam 56 closes the contacts near the end of the cycle to a relay 103. Relay 105 is then energized through cams 39,40 in parallel, whereupon circuit is made through cam 38 to the feed solenoid of tape box 10, whereupon the standing tape is fed under control of the rapid shaft 37, without effect on the typesetter. When the "carriage return" signal is reached, circuit is made through de-: coder 21 to relay 88. Cam 38 then completes a circuit to a coil of relay group 84, whereupon relay 91 is again energized,  thereby releasing relay 103 to remove control from the shaft 37, and energizing solenoid 51 to start a new cycle of shaft 44 and begin the comparison of the code numbers of the next stocks. If, on the other hand, the variable tape has an "accept" signal, circuit is made' by the cam 56 to the relay 80, and the relay 82 and one coil of the relay group 84 are also energized, the latter completing a circuit to the relay system 12, for which the relay' 80 establishes a holding circuit. The standing tape now controls the typesetter. to compose its information until the " carriage return " signal is reached, which through the decoder 21 and switch arm 70 energizes the relay 88, to break the circuit to the relay system 12, and energize relay 91 and one of the coils of group 84, through which latter and relay 82 'circuit is made to relay 92 and the relay group 18, for which the relay 92 establishes a holding circuit. The variable tape now controls the typesetter to compose its information until the "line feed" signal is reached, which controls the elevator, and energizes relay 94, thus breaking the holding circuit for relays 18 and 92, which are, however, kept energized by a circuit through contacts of a coil of relay group 95. Energization of relay 94 releases relays-82 and 91. On the final stepping of the tape, a circuit is established to a second coil of relay group 95, and through the latter coil to the first coil of said group to release the relays 18 and 92, all the circuits now being in their original condition. Energization of said first coil also completes a circuit to the solenoid 51 to initiate a further rotation of the shaft and a comparison of the code numbers of the next stock. Specification 735,206 is referred to.