000			02994cam a22003373u 4500
001			76510
003			UtSlPG
005			20260610134754.0
006			m
007			cr n
008			260607r20251899utu|||||o|||||||||||||| d
010			_a99004121
040			_aUtSlPG
041		7	_aen _2iso639-1
050		4	_aTJ
100	1		_aTennant, William John, _d1866-1951
245	1	4	_aThe slide valve, simply explained
264		1	_aSalt Lake City, UT : _bProject Gutenberg, _c2025
300			_a1 online resource : _bmultiple file formats
336			_atext _btxt _2rdacontent
337			_acomputer _bc _2rdamedia
338			_aonline resource _bcr _2rdacarrier
500			_aRelease date is 2025-07-16
508			_adeaurider, Matthew Everett and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive)
520			_a"The slide valve, simply explained by William John Tennant" is a technical engineering guide from the late 19th century, within the Victorian era. Aimed at students and practitioners, it explains how steam-engine slide valves work and how to set and modify them, using clear diagrams and a simple hands-on model to visualize motion. The book focuses on valve motion fundamentals—lap, lead, travel, eccentric advance, compression, and expansion—while also surveying practical valve types and gears used on locomotives and stationary and marine engines. The book progresses from the plain D-slide valve to a cardboard-disc model that treats the eccentric as a crank, letting readers trace admission, cut-off, release, and compression. It introduces lead and cushioning at dead centres, then shows how outside lap yields expansion and how inside lap or inside lead changes exhaust timing; “free exhaust” is explained by widening ports without changing events. It then covers double-ported valves (and similar forms like the Giddings), multiple-admission designs (such as the Straight Line/Sweet and Woodbury), and piston valves with external or internal admission (including types used on the Ide/Ideal engines). A central section demonstrates how advancing the eccentric, shifting the valve, or adding lap alters timing and duration of events. The link motion is treated as a variable eccentric—contrasting open and crossed rods, full gear, linked up, mid-gear, and back gear—with concise distribution diagrams. Finally, it addresses very early cut-off using separate cut-off gear (Meyer, Buckeye) and the Allen/Trick passage, and closes with a clear explanation of why reversing gears are needed, plus a template to build the instructional model. (This is an automatically generated summary.)
534			_pOriginally published: _cNew York: Spon & Chamberlain, 1899
653			_aSlide-valves
700	1		_aKinealy, J. H. _q(John Henry), _d1864-1928
856	4		_uhttps://archive.org/details/slidevalvesimply00tenn
856	4	0	_uhttps://www.gutenberg.org/ebooks/76510
999			_c117235 _d117235