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The lever running forward across the outside cylinder is part of the Holcroft valve gear which drives the valve of the inside cylinder. The Holcroft valve gear was a type of conjugated valve gear designed and patented by Harold Holcroft and used on three-cylinder steam locomotives of the South Eastern & Chatham Railway (SECR).
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. As with those systems it used a return crank on a driver (instead of the eccentrics used by the Stephenson valve gear). The return crank attached to the eccentric rod, which hung ...
Yale & Towne Manufacturing Co, 1897. In 1868, the business was established in Stamford, Connecticut, by Henry R. Towne and Linus Yale Sr., an inventor renowned for creating the pin tumbler lock. Initially known as Yale Lock Manufacturing Co., the company later adopted the name Yale & Towne, with its base in Newport, New York. [3]
The Baker valve gear replaces the expansion link of the Walschaerts gear with an assembly of levers and links which produces the same effect of allowing continuous variation valve travel. The remainder of the gear is the same, so that the return crank and combination lever take the same form, although the proportions are usually modified.
The valve gear operation combines two motions; one is the primary lead motion which is imparted at the bottom of the combination lever (12). The secondary is the directional/amplitude motion which is imparted at the top. Consider that the driver has adjusted the reversing lever such that the die block is at mid-gear. In this position the ...
The outer layers, known as the wheel case, contain the gate and surround the externally-toothed wheel center, change key cam, and lever arms. When a change key is inserted into the lock mechanism, it forces apart the lever arms, which then permits the wheel center to rotate freely. This in turn allows the owner to set a custom combination.
Yale (company), a lock manufacturer Yale (automobile), by the Kirk Manufacturing Company, 1901–1905 Yale (1916 automobile), by the Saginaw Motor Company, 1916-1918 Yale Motor Company [], an American car manufacturer in New Haven, Connecticut, 1898–1902
Linus Yale (April 27, 1797 – August 8, 1858) was an American businessman, inventor, metalsmith, and politician. He was a founder of Lamson, Goodnow, and Yale, an American manufacturer of bank locks, and served as the first Mayor of Newport, New York. His patents were signed by President Andrew Jackson.
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