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railways: history, signalling, engineering see the new articles on french, belgian and german signalling. for information on telegraphs and railways, please refer to telegraphs. for an explanation of the animated signals at the right, click here. photographs of signals these photographs concentrate on historical and mechanical signalling, though some light signals are included. the files require so much storage space that american, british, and continental photos will be rotated at intervals through the year. the active link show the photos that are currently online. american signals british signals continental signals typical signal aspects pennsylvania railroad position-light signals three-arm color-light signals phantom aspects the sun gets in light signals operations and safety an n.y.c.&st.l rule book from 1913 a brief history of the nickel plate, and an analysis of its rule book from the pre-van sweringen era, with several surprises. how interurbans operated, concrete examples from the icc accident reports. false clear, accidents due to signal failures. train order accidents, a discussion of failures of time table and train order operation from icc accident reports sabotage!, accidents due to malicious tampering from the icc accident reports unexpected diversion accidents, switches thrown in the face of speeding trains a bad day at si, how train orders and manual block failed railway accidents in indiana the abc system, an early form of ctc the x-response, its proper use the ctc machine, how it was operated canadian operation under the standard code signalling in europe railway signalling in france, belgium, germany and austria has many similarities to american and british signalling, but many interesting differences as well. information is not widely available in english, so this section is intended to correct this deficiency. most of the information comes from original sources in french and german, and the emphasis is historical. modern russian signalling signal code of 1885 the french signal code that governed from 1885 until 1934, in english. le crocodile an introduction to the french crocodile and speed recorders. the lartigue electro-semaphore the block system introduced by the nord in 1872. a french railway vocabulary help in reading french railway literature. french railway signalling mechanical and colour-light aspects and their meanings. a german railway vocabulary help in reading german railway literature. early german signalling a report from saxony in 1867 german and austrian signalling explaining german and austrian signalling. belgian signals, from disques to colour-lights. the disque rouge: early french and german signals have many descendants. signaux électriques à cloches an early alternative to the block system for single track. signalling in america and britain the c&nw distant signal lamp, red/green used instead of yellow. notes on pennsylvania railroad signaling and operation (1846-1950). preliminary edition. the origin of the railway semaphore from general pasley's optical telegraph. fixed signals in 1875: based on j. dutton steele's report. tidal ball signals, prototype of the railway ball signal. railway lamps in 1881, from a contemporary report. the beginnings of railways william strickland's report: to the pennsylvania society for the promotion of internal improvements, 1825. nicholas wood's and thomas tredgold's: treatises on rail roads, 1825--the state of the art. american wooden track: an adaptation to american conditions developed by j. b. jervis in the 1830's. the liverpool and manchester railway: henry booth's 1830 account of the first modern railway. railway civil engineering, historical and current turnouts: all about turnouts, points and aguillage. the slip switch: how slip switches are operated and designed. the wharton safety switch: the reasons for it, and how it worked. degree of curvature: an american practice that was a great convenience to the transitman. transition spiral: a novel way of calculating the spiral using bessel functions. wellington's economic theory of railway location: engineering at its best. track circuit: how it really works, knowing which makes it easier to manage. the second section the articles in this section are stored in another dirctory than my usual html directory to obtain additional disk space. these articles include those that appeared on my english website of a few years ago, that i think might be interesting to make available again. new york central signalling in 1912-1918 the webb "tumbler" interlocking the midland "tumbler" interlocking great western railway atc double-wire transmission french interlocking the toucey and buchanan interlocking of 1875 the ohio broad gauge and other fables history of the block system; tyer, sykes and siemens and halske bootjack signals of the lake shore and michigan southern early railway signals: vanes and semaphores principles of interlocking power interlocking from the centennial to ctc train order signals manual block in the united states electric railways interurbans in the u.s.: electric railway technology. links to other railway and signaling sites: eric schmelz's semaphores john hinson's signalbox an excellent, informative site with a clear explanation of how the british manual block system worked. david dupler's railroad page exeter west box colorado railroad museum, golden, co the european railway server modratec an australian site offering interlocking frames for modellers. return to home page
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