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The Aiken code differs from the standard 8421 BCD code in that the Aiken code does not weight the fourth digit as 8 as with the standard BCD code but with 2. Aiken code (symmetry property) Aiken code in hexadecimal coding. The following weighting is obtained for the Aiken code: 2-4-2-1. One might think that double codes are possible for a ...
Swiss classification: 4/5+4/4+4/6. The equivalent UIC classification is to be refined to (1'D)D(D2') for these engines. Only one 2-8-8-8-4 was ever built, a Mallet-type for the Virginian Railway in 1916. [1] Built by Baldwin Locomotive Works, it became the only example of their class XA, so named due to the experimental nature of the locomotive.
Box B sends 4 bells to box A. (Acknowledgement, if in the position to accept the train giving permission for box A to signal the train into the block controlled by B.) (when the signalled train enters the portion of line between A and B.) Box A sends 2 bells to box B (Train entering section) as the train passes box A and enters the block ...
Start train 2—2: Do not open doors: Passing automatic signal at 'on' 3: Set Back: Guard required by driver 3—1: Lock central door locking: 3—2—1: Testing doors: 3—3: Guard required by driver, or guard or driver to speak on the telephone: Guard's warning when the motorman exceeds the speed prescribed 3—3—1: Release central door ...
Rail joints and squats on the rail cause a familiar "clickety-clack" sound as train wheels roll over them. Rail corrugation (a periodic wear pattern resembling corrugated metal) causes tonal noise and vibration; fine, short-wavelength corrugation is known as "roaring rails" due to its high-pitched sound, whereas coarse, long-wavelength ...
Doorbell mechanism from 1884 in Andrássy Avenue, Budapest Antique mechanically operated shop doorbell on a torsion spring. William Murdoch, a Scottish inventor, installed a number of his own innovations in his house, built in Birmingham in 1817; one of these was a loud doorbell, that worked using a piped system of compressed air. [1]
Digits 1–2 are the type code, 3–4 the country of origin (where the vehicle is registered), 5–11 are defined by the country concerned, 12 is the check digit calculated via the Luhn algorithm. [4] It is followed by abbreviations for the country of origin and the owner of the vehicle.
The earliest British use of the 2-4-2 wheel arrangement appears to have been no. 21 White Raven, supplied to the St Helens Railway by James Cross of Sutton Works in 1863. It was soon rebuilt as a 2-4-0 tender locomotive and eventually passed into the stock of the London and North Western Railway (L&NWR).