Engineering works Didcot, Newbury and Southampton Railway

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grounded sr freight wagons on road-under bridge near river test viaduct.


there tunnel @ winchester leading chesil street terminus. engineering drawings tunnel put length @ 439 yards. navvies , railway workers paid tunnel allowance (a wage bonus) working in tunnels 440 yards or more in length. after protests workforce, tunnel re-measured. tunnel constructed on curve, , outside edge of tunnel found 441 yards in length, allowing money paid workers.


the line claimed first employ steam navvy (a steam-powered mechanical digger) in construction.


winchester chesil station chosen innovative system of signalling, developed in 1923 l m g ferreira of siemens brothers , co ltd , r j insell of gwr. route setting frame installed, miniature levers: frame small, measuring 2 ft 10 in 2 ft 4 in (863 mm 711 mm). forerunner of 1 control switch system; levers set routes; when lever moved mid-stroke interlocking proved route free , no conflicting move had been set up; , points moved required position, after lever moved reverse position , signal cleared. there 16 miniature levers , 15 routes selected; sixteenth king lever. points operated 120-volt supply signal box. track circuits provided @ points: described point protection tracks , is, route locking track circuits, there no track circuits in plain line. night illumination provided oil lamps except 2 signals located in tunnel; ground signals miniature semaphores of novel design.


the installation proved system implementation @ larger centres, in particular newport (monmouthshire, later gwent); winchester system replaced conventional lever frame in 1933.








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