Fuente: Wipo "digitalization" 1,142,622. Monitoring systems. TELECONTROL CORP. 7 March, 1966 [8 March, 1965], No. 9961/66. Heading G4H. A monitoring system in which a plurality of machine stations 50 (Fig. 2C) are connected to a data recorder at a central station for continuously accumulating and processing information relating to events occurring at each machine includes an address register generating address signals identifying each station so that data from the addressed station is entered, a memory 90 connected to the addidss register in which the data accumulated from each station is stored and processing apparatus 66, 70 (Figs. 2A, 2C) updating the stored data in repsonse to incoming data. Address signal generator.-A magnetic drum store 90 (Fig. 2A) which stores 100 seven-digit five-bit binary coded decimal words on each track has a track 90a on which the two digit addresses of 100 machines are stored (each address being in digit positions C, D of the seven digit positions A-G). The addresses are read out serially by head 94 via an address reshape circuit to a parity flip-flop (ATF, Fig. 9, not shown) in a parity check circuit. The set output of the flip-flop is applied to a parity check flip-flop (ATC), set at the beginning of each digit time slot and, with an odd parity check, if set at the end of each digit time slot enables shift registers (228, Fig. 9, not shown), (229, Fig. 10, not shown) to which the two fourbit address digits are fed. The shift registers feed gating amplifiers (236, Fig. 9, not shown), (238, Fig. 10, not shown) so that each digit is converted first to a signal on two out of seven leads (QUA-QUG, Fig. 9, not shown) (QTAQTG, Fig. 10, not shown) and then by twelve banks of NAND gates to an output on one of a hundred lines which enables one of the hundred switching circuits (270-272, Fig. 14, not shown) to transmit data from its associated machine or from the console (56). Transfer of data from the console.-All information relating to one machine is stored in the same bit positions on the tracks of the magnetic drum 90 (Fig. 2A) apart from the address data on track 90a which is shifted by one word length. Data is entered from the console by operating one of a hundred push-button switches (280, Fig. 14, not shown) on the control panel 108 (Fig. 2C) of the console to operate a relay (274, Fig. 14, not shown) at the associated switching circuit together with a button representing the type of data to be entered, e.g. machine number and also a data entry button. The data is set up on seven uniselectors (such as 376-378, Fig. 18, not shown) which are sequentially pulsed when the data entry flip-flop is set to cause read-out on one of ten lines (S1A-S1L). These signals are converted to binary coded decimal signals (Fig. 19, not shown) together with a parity bit and then fed to the read/write amplifier 104 (Fig. 2A) which is enabled by a gating signal, the timing of which is dependent on when the address signal from address track 90a passes through the closed contact of the relay 274 (Fig. 14, not shown) operated by the push-button (280). One of the reading heads is enabled in accordance with the type of data button operated. To automatically enter data for all machines an additional flip-flop (ALS, Fig. 15, not shown) is set to initiate a cycle of stepping switch (286) which first operates the address relay (274, Fig. 14, not shown) at the first station and when all the data for that station has been entered steps to its next position. Entry of data from machine station.-Data transmitted from the machine station 50 (Fig. 2C) comprises a piece count input on lead 51a and a time count input on cable 53a. The first is either a binary " 1 " or " 0 ", a change from " 0 " to " 1 " between two successive interrogations indicating that a piece has been made. The time count input comprises a two-channel signal, 0, 0; 0, 1 or 1, 0 indicating that the machine is switched off, that it is making a piece or that it is not making a piece respectively.