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Hackworth Valve Gear
The Hackworth valve gear is a design of valve gear used to regulate the flow of steam to the pistons in steam engines. It is a radial gear, with an actuating lever driven from the crank. The drive may be taken directly from the crank or indirectly via a return crank (as in all pictures). The other end of the actuating lever is attached to a die block which slides in a slotted link. When the link is vertical, the engine is in mid-gear. Forward, reverse and cut-off adjustments are made by moving the link away from the vertical. The valve rod is pivoted to a point on the actuating lever. History The gear was patented by John Wesley Hackworth (1820-1891), son of Timothy Hackworth, in 1859. Klug's valve gear Hackworth valve gear was a precursor to Klug's valve gear, but it differs from the latter in that the eccentric rod's suspension point moves to-and-fro in a straight line by means of a die block sliding in a slotted guide. See also * Joy valve gear - a design used extensively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hackworth Valvegear, Lydia, Perrygrove Railway
Hackworth is a surname. Notable people with the surname include: *Ben Hackworth (born 1977), Australian writer and film director *David Hackworth (1930–2005), United States Army colonel and prominent military journalist *Green Hackworth (1883–1973), American jurist of international law *John Hackworth (born 1970), American soccer coach *John Wesley Hackworth (19th century), inventor of Hackworth valve gear *Thomas Hackworth (died 1877), engineer and brother of Timothy Hackworth *Timothy Hackworth (1786–1850), steam locomotive mechanical engineer *Tony Hackworth (born 1980), English footballer *Travis Hackworth, American politician See also *Hackworth valve gear, locomotive valve gear {{surname, Hackworth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London And North Western Railway
The London and North Western Railway (LNWR, L&NWR) was a British railway company between 1846 and 1922. In the late 19th century, the L&NWR was the largest joint stock company in the United Kingdom. In 1923, it became a constituent of the London, Midland and Scottish (LMS) railway, and, in 1948, the London Midland Region of British Railways: the LNWR is effectively an ancestor of today's West Coast Main Line. History The company was formed on 16 July 1846 by the amalgamation of the Grand Junction Railway, London and Birmingham Railway and the Manchester and Birmingham Railway. This move was prompted, in part, by the Great Western Railway's plans for a railway north from Oxford to Birmingham. The company initially had a network of approximately , connecting London with Birmingham, Crewe, Chester, Liverpool and Manchester. The headquarters were at Euston railway station. As traffic increased, it was greatly expanded with the opening in 1849 of the Great Hall, designed by P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baker Valve Gear
After about 1910, the Baker valve gear was the main competitor to Walschaerts valve gear for steam locomotives in the United States. Strictly speaking it was not a valve gear but a variable expansion mechanism adapted to the Walschaerts layout replacing the expansion link and sliding die block. The Baker arrangement used more pivot bearings or ''pin joints'', but avoided the die slip inherent to the expansion link, with the aim of lessening wear and the need for service; it could also facilitate longer valve travel. History In the early 1900s there were many efforts to create a new valve gear to replace the by-then-standard Walschaerts valve gear. In the United States the Young, Southern, Caprotti and Franklin patterns were used on a few classes, but only the Baker pattern won more than limited acceptance. The design originated in the A.D. Baker Company, of Swanton, Ohio; a builder of steam traction engines. The idea came from an employee called Gifford but was developed by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walschaerts Valve Gear
The Walschaerts valve gear is a type of valve gear used to regulate the flow of steam to the pistons in steam locomotives, invented by Belgium, Belgian railway mechanical engineering, engineer Egide Walschaerts in 1844. The gear is sometimes named without the final "s", since it was incorrectly patented under that name. It was extensively used in steam locomotives from the late 19th century until the end of the steam era. History The Walschaerts valve gear was slow to gain popularity. The Stephenson valve gear remained the most commonly used valve gear on 19th-century locomotives. However, the Walschaerts valve gear had the advantage that it could be mounted entirely on the outside of the locomotives, leaving the space between the locomotive frame, frames clear and allowing easy access for service and adjustment, which resulted in it being adopted in some articulated locomotives. The first locomotive fitted with the Walschaerts valve gear was built at the Belgian Tubize worksh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Valve Gear
Southern valve gear was briefly popular on steam locomotives in the United States. It combines elements of the Walschaerts and Baker patterns. History Southern valve gear was devised by locomotive designers on the Southern Railway and used on many locomotives on that line. The first patent was issued to Wm. Sherman Brown in 1906. He continued work and another patent was issued July 23, 1912. The gear was first tested on Mikado 586 in February, 1913 at Southern Knoxville Shops. It was specified for some USRA standard locomotive designs, though many locomotives constructed to these patterns used Walschaerts or Baker valve gear instead. The Southern valve gear was used on many Southern Railway locomotives, including survivors 630 and 722. It was also used on East Broad Top numbers 16-18, which survive today. Operation Unlike the Walschaerts and Baker systems, the Southern valve gear dispensed with the combination lever which transmitted some of the crosshead motion to the valves. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marshall Valve Gear (Marshall, Sons & Co
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Marshall valve gear may refer to: * Marshall valve gear, a modified Hackworth valve gear, patented in 1879 by Marshall, Sons & Co. * J. T. Marshall valve gear, any of several valve gears invented by James Thompson Marshall See also * Valve gear The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It can also serve as a reversing g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LNWR G Class
The London and North Western Railway (LNWR) Class G were several related classes of 0-8-0 steam locomotives. These 0-8-0s were the principal work-horses for freight traffic on the latter-day London & North Western. History 32 of this class were rebuilt from 4-cylinder compound Class B between 1906 and 1917. The outside high-pressure cylinders were removed and the inside low-pressure cylinders were re-used, in their original position, to make a two-cylinder simple expansion engine. The boiler pressure was reduced from 200 psi to 160 psi to keep the tractive effort approximately the same. The rebuilt engines retained their old numbers. Additionally, 60 new Gs were built in 1910. The rebuilt engines were easily distinguished from the new builds by having "piano fronts". Rebuilding The first of the class, LNWR No. 2653, was rebuilt to Class G1 in 1912. The remaining 91 engines were inherited by the LMS in 1923. LMS numbers were 9077-9144. The LMS rebuilt them all to C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lancashire And Yorkshire Railway
The Lancashire and Yorkshire Railway (L&YR) was a major British railway company before the 1923 Grouping. It was incorporated in 1847 from an amalgamation of several existing railways. It was the third-largest railway system based in northern England (after the Midland and North Eastern Railways). The intensity of its service was reflected in the 1,650 locomotives it owned – it was by far the most densely-trafficked system in the British Isles with more locomotives per mile than any other company – and that one third of its 738 signal boxes controlled junctions averaging one every . No two adjacent stations were more than apart and its 1,904 passenger services occupied 57 pages in '' Bradshaw'', a number exceeded only by the Great Western Railway, the London and North Western Railway, and the Midland Railway. It was the first mainline railway to introduce electrification of some of its lines, and it also ran steamboat services across the Irish Sea an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Apedale Narrow Gauge (5549206341)
''The'' () is a grammatical article in English, denoting persons or things that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the most frequently used word in the English language; studies and analyses of texts have found it to account for seven percent of all printed English-language words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with nouns of any gender. The word can be used with both singular and plural nouns, and with a noun that starts with any letter. This is different from many other languages, which have different forms of the definite article for different genders or numbers. Pronunciation In most dialects, "the" is pronounced as (with the voiced dental fricative followed by a schwa) when followed by a consonant sound, and as (homophone of the archaic pron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timothy Hackworth
Timothy Hackworth (22 December 1786 – 7 July 1850) was an English steam locomotive engineer who lived in Shildon, County Durham, England and was the first locomotive superintendent of the Stockton and Darlington Railway. Youth and early work Timothy Hackworth was born in Wylam in 1786, five years after his fellow railway pioneer George Stephenson had been born in the same village. Hackworth was the eldest son of John Hackworth who occupied the position of foreman blacksmith at Wylam Colliery until his death in 1804; the father had already acquired a considerable reputation as a mechanical worker and boiler maker. At the end of his apprenticeship in 1810 Timothy took over his father's position. Since 1804, the mine owner, Christopher Blackett had been investigating the possibilities of working the mine's short colliery tramroad by steam traction. Blackett set up a four-man working group including himself, William Hedley, the viewer; Timothy Hackworth, the new foreman smith an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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