Patent GB-733795-A (GB)
Title: Improvements relating to translating apparatus as employed in automatic telephone and like selective systems
Inventor: STALLWORTHY FRANK ALLEN
IPC: H04Q3/42
Filed: 1952-08-15
Abstract: 733,795. Automatic exchange systems. SIEMENS BROS. & CO., Ltd. Aug. 14, 1953 [Aug. 15, 1952], No. 20607/52. Class 40 (4). In a translator translating code signals representing decimal numbers into other code signals representing decimal numbers, the cross-connections determining the decoding and encoding are between terminals identifiable on a decimal basis. The translator is common to a number of register senders. The cross-connections are effected by strappings on terminal blocks-consisting of terminal strips interleaved with insulating strips, there being one block for each digit place of each translation. Thus for each translation there are three incoming digit blocks ATS, BTS, CTS, Fig. 4, three main route digit blocks FTS, STS, TTS, three alternative route digit blocks and two spare digit blocks and a block MTS which signals the number of digits replaced by the translation, arranged in a horizontal row. The corresponding blocks of all the translations are stacked vertically and the code terminals of each stack are multipled. -Each terminal block comprises two groups of code terminal strips WA ... ZA, WB .. ZB, each group being associated with a common terminal strip CA, CB and a spare digit terminal strip SA, SB. .On the code side, Fig. 7, of the block each strip has one projecting terminal, the terminals apart from those of the strips CA, CB being staggered to facilitate multipling. On the other side, Fig. 6, there are eleven vertically spaced terminal positions, ten digit positions and one spare digit position. The common strips CA, CB have a terminal in each position, each group of strips WA ... ZA, WB ... ZB has one terminal in each digit position and the spare digit strips SA, SB each have a terminal in the last position. By connecting two strappings between the common strips CA, CB and the code strips or spare digit strips in one of the vertical positions the block is connected for encoding or decoding the digit corresponding to that position (e.g. digit S corresponds to fifth position) or for indicating a spare digit place. The incoming digits, say 572, are signalled by earthing one or two of leads W ... Z, Fig. 1, of the digit groups AG, BG, CG. The operated code relays AWA, AWB, AZA, AZB representing the first digit S apply battery and earth to the code terminal strips WA and ZB respectively of the terminal blocks ATS and the relays ADR connected between the common terminals CA, CB and associated with terminal blocks having strappings in the fifth position operate to prepare circuits for similar relays BDR associated with the terminal blocks BTS. The operated code relays of the second group BG corresponding to the digit 7 apply battery and earth to terminal strips YA, ZB of the terminal blocks BTS and all relays BDR associated with translations having the first two incoming digits S7 operate to prepare the corresponding relays TRR associated with the terminal blocks CTS. Similarly the operated coder relays of the third group energize the relay TRR corresponding to the required translation whereupon the common terminal strips of the eight outgoing digit blocks associated with this relay are earthed. Only the three main route digit blocks TFS, STS, TTS are shown in Fig. 1. Depending on the position of the strappings on the blocks FTS, STS, TTS earth is applied to one or two of the leads W ... Z of the outgoing code digit groups FG, SG, TG respectively. Similarly the five other outgoing code digit groups relating to alternative routes and extra digits are marked. The relay TRR makes a connection between leads DGX connected to a supervisor's position and leads DG connected to the register sender so that alternative route and other control signals may be sent to the register sender. The terminal block MTS associated with the translation earths one of the wires MG to signal to the register sender the number of digits which the translation replaces. If the translation is produced by a single incoming digit only one relay ADR is energized. The spare digit strips SA, SB of the terminal blocks BTS, CTS associated with the translation are strapped by strappings in the eleventh position to the common terminal strips CA, CB so that ADR brings up BDR and TRR follows to effect translation.