Patent GB-604297-A (GB)
Title: Improvements in or relating to communication and posting systems
IPC: G08G5/00
Filed: 1945-07-02
Abstract: 604,297. Electric indicator systems. TELEREGISTER CORPORATION. July 2, 1945, No. 16750. Convention date, Sept. 2, 1944. [Class 40 (i)] An indicator assembly, particularly for displaying information about the progress of a number of aircraft flights, comprises a record board in which numerical indicators are arranged in horizontal rows, each of which is assigned to a particular flight, and the indicators in which are operated in accordance with an incoming message. According to the invention, one element (e.g. time) of the incoming message is compared with the similar elements recorded on the board to choose the row to display the incoming signal in chronological order. General description of system.-Each signal comprises a series of numerals transmitted as .five unit code signals; the first two numerals indicate the identification number, the third the fix (e.g. destination), the fourth is a code signal to indicate the character of the fifth and sixth numerals (e.g. whether altitude or time). The signals are recorded as tape perforations and, eventually, indicators IT, IU, TT, TU, AT, AU in a display board, Fig. 11, and a record board, Figs. 6, 7, are operated in the appropriate row. Recording and registering incoming message.-Starting magnet SM1, Fig. 1, unlocks the brush B 1 ... 6 of a distributer DR1, Fig. 1, to apply the first recorded signal corresponding to the tens digit of the identification number lever segment 2 of DR1 to actuate register relays IT1 ... 5, Fig. 3, to connect one line in cable 303, Fig. 3, to the apex 305 of contact pyramid PR1 and to set the contacts in PR2, Fig. 3. Similarly, the second signal is applied over segments 4 of DR1, Fig. 1, to the units digit of the register assembly Second Digit Ident., Fig. 3. The third signal corresponding to fix (e.g. destination) is applied over segments 6 of DR1, Fig. 1, to register relays F1 ... 5, Fig. 3, to connect one line in cable 309 to earth at 301, Fig. 3. The fourth signal is applied to relays R1 ... 5, Fig. 1, to actuate either relay T or A, Fig. 2, and the fifth and sixth signals are applied to register relay assemblies 302, Fig. 3, and 401, Fig. 4, which are similar to assembly Second Digit Ident., Fig. 3. Selection of record board row when incoming message relates to a flight already recorded on record board.-Cables 303, 304 and 309, Fig. 3, are connected to contact banks 601, 603, 606, Fig. 6, of switches connected mechanically to the indicators in each row of the record board so that if, e.g. the received fix is 8 and the received identification number is 08, terminals 8, 0, 8 of banks 606, 601, 603, Fig. 6, in all rows are earthed. If this combination already exists on one row of the record board, wipers in that row will rest on these contacts to operate a circuit for relays FC, UC, TC, Fig. 6, in that row and complete a circuit for relay AGA14, Fig. 6, in that row which actuates relay GA14, Fig. 5, in that row which in turn operates relay GOT, Fig. 1, so that when the brush B6 reaches segment 7 of DR1, Fig. 1, no circuit is completed. Brush B6 then proceeds to segment 14 of DR1 to operate the start magnet SM2 of distributer DR2, Fig. 2, which de-energizes SM1 until distributer DR2 has completed its cycle. Brush B6 also actuates relay RLSB, Fig. 1, to release relays BRS, Fig. 2, and BRL, Fig. 8, if these relays had actuated. Distributer DR2 then energizes pulsing relays P1, P2, P4, P7, Fig. 2, to operate the indicators IT, IU, Fig. 6, TT, TU, AT, AU, Fig. 7, over contacts of relay GA14, Fig. 5, as described below. Selection of record board row if incoming message relates to a new flight.-If the received combination of fix and identification member does not exist on the record board, relays FC, UC, TC, Fig. 6, do not operate in any row so that relay GOT, Fig. 1, remains unoperated, and when brush B6 reaches segment 7 of DR1, relay BRS, Fig. 2, operates to actuate relay I, Fig. 2, and also to earth all B lines in banks 601, 603, Fig. 6, in all rows of the record board. Thus, all rows which register the desired fix, but have wipers 601, 603, Fig. 6, resting on " Blank " (i.e. contact B) have their relays FC, TC, UC, Fig. 6, operated to actuate one of the relays BRT0 ... 9, B, Fig. 8, over a circuit prepared by relay BRS, Fig. 2, and including wiper and contact bank 615, Fig. 6. Relays BRT0 ... 9, B are connected so that operation of one breaks the circuit for all higher numbered relays and therefore only the lowest numbered relay'as determined by the setting of wiper 803, Fig. 8, can operate. The actuation of one relay BRT selectively energizes relay BT6, Fig. 6, in those rows of the record board whose wipers 615 rest on contact numbered as the number of the BRT relay operated. Relays PTC, Fig. 6, complete a circuit over wipers 619 for relays BRUO ... 9, B, Fig. 5, which are connected so that only one can operate to actuate relay PTU, Fig. 6, in that row of the record -board which has wiper 619 resting on the lowest numbered contact. Relay PTU, Fig. 6, actuates relay AG14, Fig. 6, in the selected row, which actuates relay GA14 to connect the indicators IT, IU, Fig. 6, TT, TU, AT, AU, Fig: 7, in the record board for operation over the contacts of relays A, T, I, Fig. 2, from the pulsing relays P1, P2, P4, P7, Fig. 2. Selection of row in display board.-The rows in the display board grouped in a predetermined fix and a relay FX (shown as FX9, Fig. 10) is common to all rows in one fix group. The appropriate FX relay (e.g. FX9) is operated by the setting of fixed register relays F1 ... F5, Fig. 3, to operate a switch BRLS, Fig. 10, to step wiper,1001 over a contact bank connected to the off-normal contacts of the indicators IT, Fig. 11, in those rows of the display board allotted to fix 9. Any row exhibiting a display earths the corresponding contact on the bank 1001, and the wiper rests'on an open contact which is made the lowest by bringing the wiper back to O before each selection. Wipers 1004 ... 1008, Fig. 10, thus take up a corresponding position and selectively energize relays 701, Fig. 7, over contacts of GA14, Fig. 5, to selectively operate relays DGU1, 2, 4, 7, Fig. 10, and DGT1, 2, 4 to energize one of the relays DGA0 ... 14 in the display board so that indicators IT, IU, TT, TU, AT, AU, Fig. 11, in the lowest blank row of the group assigned to the received fix are connected in parallel with the corresponding indicators in the record board, Figs. 6 and 7. Pulsing of indicators.-Assuming that the received message contains altitude data, the fourth signal, applied to relays R1 ... R5, Fig. 1, operates relay A, Fig. 2, thus channelling the pulses from relays P1, P2, P4, P7, Fig. 2, to indicators IT, IU, AT, AU in both the record and display boards. Segment 2 of distributer DR2, Fig. 2, operates relay M, Fig. 11, to connect together the corresponding indicators in each row of the display board. Segments 4 ... 22 of distributer DR2, Fig. 2, actuate relay P1, Fig. 2, to pulse the indicators IT, IU, AT, AU back to zero when they are not already at zero. Segments 24 of distributer DR2 then actuates relay AG, Fig. 2, to connect the contacts of pulsing relays P1, P2, P4, P7, Fig. 2, to the contact assemblies PR2 in the register relay sets 301, 302, 401, Figs. 3 and 4, and to actuate relay AG14, Fig. 11, to prepare an earth circuit for the display board indicators in the selected row. Segments 26 ... 34 of distributer DR2 actuate pulsing relays P1, P2, P4, P7 to generate pulses corresponding to the settings of contacts in PR2 of 301, 302, 401, Figs. 3 and 4, to actuate the indicators IT, .IU, AT, AU in both record and display boards. Segment 45 of distributer DR2, Fig. 2, then actuates relay RAGA, Fig. 2, to unlock relay AGA14, Fig. 6, and release register relays F1 ... F5, Fig. 3, IT1 ... IT5, &c. Relay P, Fig. 3, is operated from segment 46 of distributer DR2 to provide a pulse for impulsing NPT and NPU, Fig. 6, when these have to be changed as described below, while segment 47 actuates relay REL, Fig. 2, to release relays AG, Fig. 11, I, Fig. 2, GA14, Fig. 5, which last releases relays 701, Fig. 7, DGT, DGU, Fig. 10, thus releasing relay DGA14, Fig. 11. Operation when received time signal is same as recorded time signal.-Time is received as two digits, the first representing ten minutes, and the second representing 0 ... 9 minutes. Base time is therefore established by a relay BT, Fig. 4, actuated by a clock T to step on a wiper every ten minutes and actuate successively one of relays BTTO ... 5, Fig. 4. If the fourth incoming signal indicates that the fifth and sixth signals represent time, register relays R1 ... R5, Fig. 1, actuate relay T, Fig. 2, so that the start magnet SM4. of distributer DR4, Fig. 1, is energized from segment 7 of distributer DR1, Fig. 1, instead of start magnet SM2, Fig. 2. Segment 2 of distributer DR4, Fig. 2, operates relay CMP, Fig. 4, to connect the contacts of relays ETUO ... 9, Fig. 4, and and NTTO ... 5 (which are selectively energized by the incoming time signal) to contact banks 707, 706, Fig. 7, in all rows of the record board. Relay PC, Fig. 9, is also energized from segment 2 of distributer DR4 to connect the contact banks 615, 619, Fig. 6, in all rows of the record board to relays PTO ... 9, B and PUO ... 9, B, Fig. 9. Segment 3 of distributer DR4 operates relay C, Fig. 1, to earth the wipers 623, 619, Fig. 6 (ganged with the wipers operated by switches NPT to provide comparison circuits) in that row of the record board whose GA relay, Fig. 5, has been operated as described above, so that one relay in each of the groups PTO ... 9, B, PU0 ... 9, B, Fig. 9, is operated in accordance with the position of wipers 623, 619, Fig. 6; as shown, relays PTO and PU9 will operate. Relay C, Fig. 1, also earths wipers 706, 707, Fig. 7, in the selected row, so that if the time set by the message in relays NTU0 ... 9 and NTTO ... 5 is the same as that recorded by the wipers 706, 707, Fig. 7,