137:, the latter because the reversing lever could be held in precise positions by means of a catch on the lever engaging notches in a quadrant; the term stuck even after the introduction of the screw reverser. A further intrinsic advantage of the Stephenson gear not found in most other types was variable lead. Depending on how the gear was laid out, it was possible to considerably reduce compression and back pressure at the end of each piston stroke when working at low speed in full gear; once again as momentum was gained and cutoff shortened, so lead was automatically advanced and compression increased, cushioning the piston at the end of each stroke and heating the remaining trapped steam in order to avoid temperature drop in the fresh charge of incoming admission steam.
183:
known respectively as the 'locomotive link' and the 'launch link'. The launch link superseded the locomotive type as it allows more direct linear drive to the piston rod in full gear and permits a longer valve travel within a given space by reducing the size of eccentric required for a given travel. Launch-type links were pretty well universal for
American locomotives right from the 1850s but, in Europe, although occurring as early as 1846, they did not become widespread until around 1900. Larger marine engines generally used the bulkier and more expensive marine double-bar link, which has greater wearing surfaces and which improved valve events by minimising geometric compromises inherent in the launch link.
228:
the weight of the radius rod. This meant that the link was convex (in relation to the eccentrics) instead of concave. Gooch valve gear had the disadvantage of angularity between the valve spindle and the eccentric rod in full gear, whereas the best forms of the
Stephenson gear, the thrust was in a straight line. The Gooch gear gave constant lead at whatever cutoff. This was observed to be a disadvantage when similar locomotives fitted with either Gooch or Stephenson gear were compared in service Gooch gear was never popular in Britain except with one or two engineers down to the 1860s, but it was quite common in France.
31:
198:, had Stephenson valve gear mounted outside the wheels and frames. Instead of eccentrics, double return cranks were used to drive the eccentric rods, and a launch-type expansion link was used. This one cost ÂŁ13,278, which was about ÂŁ600 more than those built at the same time with Walschaerts' valve gear. The aim of the experiment was to find out if a valve gear having variable lead (as opposed to the constant lead of the Walschaerts' motion) would affect performance. On trial, it proved to have no advantage, although in normal service it did gain a reputation as a good performer on banks.
161:"(...) the most universally suitable valve gear of all, for it can be worked out for a long engine structure or a short one. It can be a very simple valve gear and still be very accurate, but its great advantage is that its accuracy is self-contained, for the exact relationship between its points of support (eccentrics on shaft, valve crosshead, and link hanger arm) have but little effect on the motion of the valve. Its use on engines in which all the cylinders lie in one plane, represents, in the belief of the writer, the best choice."
39:
100:. The gab motion incorporated two sets of eccentrics and rods for each cylinder; one eccentric was set to give forward and the other backwards motion to the engine and one or the other could accordingly engage with a pin driving the distribution valve by means of the gabs: - vee-shaped ends to the eccentric rods supposed to catch the rocker driving the valve rod whatever its position. It was a clumsy mechanism, difficult to operate, and only gave fixed valve events.
104:
207:
to keep the centre of gravity, and therefore the boiler centre line as low as possible. Because valve gears in
Britain were generally placed between the frames beneath the boiler, the extremely cramped conditions made the valve gear inaccessible for servicing. Also reversing could be a strenuous occupation as it entailed lifting the weight of the link plus eccentric rod ends. In order to address these problems two main variants were developed:
216:
115:, draughtsman William Howe and pattern-maker William Williams, suggested the simple expedient of replacing the gabs with a vertical slotted link, pivoted at both ends to the tips of the eccentric rods. To change direction, the link and rod ends were bodily raised or lowered by means of a counterbalanced
227:
in 1843) the reversing and cut-off functions were achieved by raising or lowering a radius rod which connected the valve-rod to a "stationary" link pivoting around a fixed point. The advantages sought were reduced height for the gear and lighter action as the reversing lever was only required to lift
206:
As a harmonic valve gear, the
Stephenson arrangement may be considered as optimum. Nevertheless, the fact the link needed to be bodily displaced in order to reverse meant that it required considerable vertical clearance. At the time of its introduction, it was deemed important in the locomotive world
163:
Another benefit of the
Stephenson gear, intrinsic to the system, is variable lead: usually zero in full gear and increasing as cutoff is shortened. One consequent disadvantage of the Stephenson gear is that it has a tendency to over-compression at the end of the stroke when very short cut-offs are
128:
admission steam earlier in the stroke and using a smaller amount steam expansively in the cylinder, using its own energy rather than continuing to draw from the boiler. It became the practice to start the engine or climb gradients at long cutoff, usually about 70-80% maximum of the power stroke and
182:
Details of the gear differ principally in the arrangement of the expansion link. In early locomotive practice, the eccentric rod ends were pivoted at the ends of the link while, in marine engines, the eccentric rod pivots were set behind the link slot (or below on a vertical engine). These became
123:
that connected it to the reversing lever. This not only simplified reversing but it was realised that the gear could be raised or lowered in small increments, and thus the combined motion from the “forward” and “back” eccentrics in differing proportions would impart shorter travel to the valve,
240:
in 1855) combined the features of the
Stephenson and Gooch gears. The reversing and cut-off functions were achieved by simultaneously raising the radius rod and lowering the link or vice versa. As with the Gooch gear, this saved space but the Allan gear gave performance closer to that of the
129:
to shorten the cutoff as momentum was gained to benefit from the economy of expansive working and the effect of increased lead and higher compression at the end of each stroke. This process was popularly known as
241:
Stephenson. Moreover, the straight expansion link simplified manufacture. Once again, the Allan gear was not often used in the UK but fairly common on the
Continent. Notable UK examples are the
89:
164:
used, and therefore the minimum cut-off cannot be as low as on a locomotive with
Walschaerts gear. Longer eccentric rods and a shorter link reduce this effect.
1070:
175:
engines and to stationary engines that needed to reverse, such as rolling-mill engines. It was used on the overwhelming majority of marine engines. The
97:
670:
140:
American locomotives universally employed inside
Stephenson valve gear placed between the frames until around 1900 when it quickly gave way to outside
1785:
675:
577:
186:
In the United
Kingdom, locomotives having Stephenson valve gear normally had this mounted in between the locomotive frames. In 1947, the
34:
British LMS Stanier Class 5 4-6-0 Locomotive no. 44767 showing experimental Stephenson valve gear unusually mounted outside the frames
167:
Stephenson valve gear is a convenient arrangement for any engine that needs to reverse and was widely applied to railway locomotives,
1063:
531:
Holcroft, Harold (1957). An outline of Great Western locomotive practice, 1837-1947; Locomotive Publishing Co Ltd, London, U.K. p.20.
508:
1945:
1818:
1955:
148:
or return cranks or else between the frames driven from the axle through eccentrics, as was mostly the case in Great Britain.
516:
237:
341:
1851:
1624:
1056:
187:
361:
White, John H. Jr. (1968): A History of the American locomotive, its development: 1830-1880; Dover republication of 1979,
1520:
543:
480:
Pictorial Supplement to LMS Locomotive Profile no. 6 – The Mixed Traffic Class 5s – part 2, nos. 5225–5499 and 4658–4999
179:
used Stephenson gear on most of its locomotives, although the later four-cylinder engines used inside Walschaerts gear.
107:
Inside Stephenson valve gear as applied to a French 0-6-0 outside cylinder mixed traffic locomotive (Midi 801) in 1867
1515:
487:
458:
429:
401:
366:
1663:
1979:
1891:
378:
Walton J.N. (1965–74) Doble Steam Cars, Buses, Lorries, and Railcars . "Light Steam Power" Isle of Man, UK; p. 196.
17:
1018:
973:
858:
719:
570:
1845:
311:
based on automotive valves it uses camshafts and poppet valves. Considered more efficient than any other method.
2020:
1950:
1594:
219:
Gooch outside valve gear as applied to a French 2-4-0 outside cylinder express locomotive (Midi no. 51) in 1878
195:
1839:
1238:
739:
112:
1826:
194:
locomotives, most of which had the Walschaerts' valve gear that was normal for this class, but one of them,
1614:
709:
1964:
144:
motion. In Europe, Stephenson gear could be placed either outside the driving wheels and driven by either
1682:
1654:
1538:
1150:
1093:
276:
1553:
1432:
563:
1984:
1973:
1831:
1530:
1143:
963:
793:
258:
191:
1758:
1690:
1994:
1989:
1910:
1779:
1634:
1579:
1301:
1257:
549:
1797:
1558:
1999:
1897:
1771:
1738:
1619:
1321:
1270:
1208:
869:
833:
774:
288:
262:
141:
1864:
1589:
1510:
1483:
1280:
1108:
948:
848:
665:
242:
176:
145:
125:
1924:
1609:
1548:
1409:
1275:
1223:
1160:
1113:
1037:
744:
270:
30:
933:
505:
A detailed history of The Stanier Class Five 4-6-0s Volume 2 – on 45472–45499, 44658–44999
451:
LMS Locomotive Profiles, no. 6 – The Mixed Traffic Class 5s – Nos. 5225–5499 and 4658–4999
8:
1918:
1452:
1326:
1243:
1233:
764:
724:
304:
997:
1414:
923:
714:
647:
393:
254:
1715:
1563:
1502:
1457:
1437:
1424:
1404:
1386:
1331:
1285:
1155:
1098:
803:
657:
512:
483:
454:
425:
397:
362:
292:
67:
1791:
1752:
1478:
1396:
1366:
1218:
759:
704:
595:
298:
266:
79:
913:
1697:
1639:
1447:
1442:
1356:
1311:
1007:
908:
337:
308:
168:
1883:
1732:
1704:
1381:
1203:
1193:
1103:
1002:
992:
953:
893:
888:
853:
749:
729:
680:
250:
246:
84:
818:
279:) is provided with Fletcher's patent arrangement of Allan straight link gear.
2014:
1671:
1644:
1543:
1462:
1298:
982:
928:
903:
898:
823:
798:
327:
Snell, J B (1971). Mechanical Engineering: Railways, Longman & Co, London
295:
in 1844 becoming the most widely used valve gear in Europe and North America.
103:
38:
1872:
1629:
1376:
1361:
1316:
1170:
1165:
1079:
943:
828:
808:
224:
63:
1724:
1295:
1265:
1138:
958:
938:
918:
838:
612:
301:
invented by American engineers in 1903 and widely used in North America.
156:
1803:
1746:
1371:
1306:
1290:
1228:
1185:
1175:
878:
843:
813:
754:
690:
622:
600:
586:
475:
446:
417:
116:
59:
1599:
1584:
1027:
637:
632:
617:
604:
172:
555:
1488:
1032:
627:
215:
987:
883:
1048:
1604:
1341:
642:
62:
that was widely used throughout the world for various kinds of
307:
invented in the early 1920s by Italian architect and engineer
1123:
784:
474:
Jennison, John; Clarke, David; Hunt, David; James, Fred;
424:. Wellingborough: Patrick Stephens Ltd. pp. 256–7.
473:
444:
388:
Rowledge, John Westbury Peter; Reed, Brian (1984) .
1213:
699:
338:"Basic info' on the Stephensons (Fact file 2 of 8)"
78:During the 1830s, the most popular valve drive for
231:
2012:
369:, original published by the Johns Hopkins Press.
291:invented by Belgian railway mechanical engineer
236:The Allan straight link valve gear (invented by
1064:
571:
387:
1071:
1057:
578:
564:
42:A simple Stephenson gear in partial cutoff
482:. Didcot: Wild Swan. pp. 28–29, 31.
453:. Didcot: Wild Swan. pp. 39–43, 85.
502:
449:; Jennison, John; Clarke, David (2004).
214:
102:
73:
37:
29:
1946:Glossary of steam locomotive components
14:
2013:
507:. Locomotives of the LMS. Maidenhead:
1052:
734:
585:
559:
552:Stephenson valve gear, with diagrams.
223:In the Gooch valve gear (invented by
416:
188:London, Midland and Scottish Railway
210:
70:but was invented by his employees.
24:
1798:National Museum of Scotland engine
546:of standard Stephenson valve gear.
159:considered Stephenson valve gear:
25:
2032:
1078:
537:
1980:List of steam technology patents
859:Schwartzkopff-Eckhardt II bogie
525:
344:from the original on 2015-11-15
151:
1965:Murdoch's model steam carriage
1951:History of steam road vehicles
496:
467:
438:
410:
381:
372:
355:
330:
321:
261:class (which were produced by
253:classes, and the narrow-gauge
232:Allan straight link valve gear
201:
13:
1:
1892:Murray's Hypocycloidal Engine
390:The Stanier 4-6-0s of the LMS
315:
113:Robert Stephenson and Company
1615:Return connecting rod engine
422:Great Locomotives of the LMS
277:Fletcher, Jennings & Co.
7:
1539:Condensing steam locomotive
282:
27:Simple design of valve gear
10:
2037:
1846:"Coalbrookdale Locomotive"
445:Hunt, David; James, Fred;
111:In 1841, two employees of
1938:
1909:
1882:
1863:
1852:"Pen-y-Darren" locomotive
1817:
1770:
1723:
1714:
1681:
1662:
1653:
1572:
1529:
1521:Single- and double-acting
1501:
1471:
1423:
1395:
1349:
1340:
1256:
1184:
1131:
1122:
1086:
1016:
972:
867:
794:AAR type A switcher truck
783:
689:
656:
594:
1691:Newcomen Memorial Engine
190:built a series of their
1995:Timeline of steam power
1990:Stationary steam engine
1873:Woolf's compound engine
1780:Soho Manufactory engine
1635:Steeple compound engine
1302:straight line mechanism
503:Jennison, John (2015).
275:(which was produced by
2000:Water-returning engine
1974:Lean's Engine Reporter
1747:Chacewater Mine engine
1620:Six-column beam engine
834:Krauss-Helmholtz bogie
511:. pp. 13, 92–94.
289:Walschaerts valve gear
269:'s second locomotive,
263:George England and Co.
220:
108:
58:is a simple design of
43:
35:
2021:Locomotive valve gear
1840:London Steam Carriage
849:Radial steering truck
666:AAR wheel arrangement
243:Great Western Railway
218:
192:Stanier Class 5 4-6-0
177:Great Western Railway
106:
74:Historical background
48:Stephenson valve gear
41:
33:
1786:Bradley Works engine
1610:Reciprocating engine
1433:Babcock & Wilcox
1276:Centrifugal governor
676:Swiss classification
66:. It is named after
1327:Sun and planet gear
394:David & Charles
305:Caprotti valve gear
1827:Richard Trevithick
1425:Water-tube boilers
1239:Gresley conjugated
924:Klien-Lindner axle
671:UIC classification
648:Dual Control Stand
396:. pp. 62–63.
255:Ffestiniog Railway
221:
109:
44:
36:
2008:
2007:
1934:
1933:
1813:
1812:
1497:
1496:
1397:Fire-tube boilers
1252:
1251:
1046:
1045:
949:Road–rail vehicle
934:Luttermöller axle
804:Articulated bogie
658:Wheel arrangement
518:978-0-901115-99-7
293:Egide Walschaerts
80:steam locomotives
68:Robert Stephenson
16:(Redirected from
2028:
1958:fardier Ă vapeur
1792:Whitbread Engine
1753:Smethwick Engine
1721:
1720:
1660:
1659:
1479:Feedwater heater
1347:
1346:
1129:
1128:
1073:
1066:
1059:
1050:
1049:
819:Cleminson system
580:
573:
566:
557:
556:
550:Trouble shooting
532:
529:
523:
522:
500:
494:
493:
471:
465:
464:
442:
436:
435:
414:
408:
407:
392:. Newton Abbot:
385:
379:
376:
370:
359:
353:
352:
350:
349:
334:
328:
325:
299:Baker valve gear
267:Talyllyn Railway
211:Gooch valve gear
169:traction engines
21:
18:Allan valve gear
2036:
2035:
2031:
2030:
2029:
2027:
2026:
2025:
2011:
2010:
2009:
2004:
1930:
1905:
1878:
1859:
1809:
1766:
1710:
1698:Fairbottom Bobs
1683:Newcomen engine
1677:
1649:
1595:Expansion valve
1568:
1554:Watt's separate
1525:
1493:
1467:
1419:
1391:
1336:
1312:Parallel motion
1248:
1199:Stephenson link
1180:
1118:
1087:Operating cycle
1082:
1077:
1047:
1042:
1012:
968:
909:Equalising beam
863:
779:
685:
652:
599:
590:
584:
540:
535:
530:
526:
519:
501:
497:
490:
472:
468:
461:
443:
439:
432:
415:
411:
404:
386:
382:
377:
373:
360:
356:
347:
345:
336:
335:
331:
326:
322:
318:
309:Arturo Caprotti
285:
238:Alexander Allan
234:
213:
204:
154:
76:
52:Stephenson link
28:
23:
22:
15:
12:
11:
5:
2034:
2024:
2023:
2006:
2005:
2003:
2002:
1997:
1992:
1987:
1982:
1977:
1970:
1969:
1968:
1962:
1948:
1942:
1940:
1936:
1935:
1932:
1931:
1929:
1928:
1922:
1915:
1913:
1907:
1906:
1904:
1903:
1895:
1888:
1886:
1880:
1879:
1877:
1876:
1869:
1867:
1861:
1860:
1858:
1857:
1856:
1855:
1849:
1843:
1837:
1823:
1821:
1815:
1814:
1811:
1810:
1808:
1807:
1801:
1795:
1789:
1783:
1776:
1774:
1768:
1767:
1765:
1764:
1756:
1750:
1744:
1736:
1733:Kinneil Engine
1729:
1727:
1718:
1712:
1711:
1709:
1708:
1705:Elsecar Engine
1702:
1694:
1687:
1685:
1679:
1678:
1676:
1675:
1668:
1666:
1657:
1651:
1650:
1648:
1647:
1642:
1637:
1632:
1627:
1625:Steeple engine
1622:
1617:
1612:
1607:
1602:
1597:
1592:
1587:
1582:
1576:
1574:
1570:
1569:
1567:
1566:
1561:
1556:
1551:
1546:
1541:
1535:
1533:
1527:
1526:
1524:
1523:
1518:
1513:
1507:
1505:
1499:
1498:
1495:
1494:
1492:
1491:
1486:
1484:Feedwater pump
1481:
1475:
1473:
1469:
1468:
1466:
1465:
1460:
1455:
1450:
1445:
1440:
1435:
1429:
1427:
1421:
1420:
1418:
1417:
1412:
1407:
1401:
1399:
1393:
1392:
1390:
1389:
1384:
1379:
1374:
1369:
1364:
1359:
1353:
1351:
1350:Simple boilers
1344:
1338:
1337:
1335:
1334:
1332:Watt's linkage
1329:
1324:
1319:
1314:
1309:
1304:
1293:
1288:
1283:
1281:Connecting rod
1278:
1273:
1268:
1262:
1260:
1254:
1253:
1250:
1249:
1247:
1246:
1241:
1236:
1231:
1226:
1221:
1216:
1211:
1206:
1201:
1196:
1190:
1188:
1182:
1181:
1179:
1178:
1173:
1168:
1163:
1158:
1153:
1148:
1147:
1146:
1135:
1133:
1126:
1120:
1119:
1117:
1116:
1111:
1106:
1101:
1096:
1090:
1088:
1084:
1083:
1076:
1075:
1068:
1061:
1053:
1044:
1043:
1041:
1040:
1035:
1030:
1024:
1022:
1019:exhaust system
1014:
1013:
1011:
1010:
1005:
1000:
995:
990:
985:
979:
977:
974:Exhaust system
970:
969:
967:
966:
961:
956:
954:Trailing wheel
951:
946:
941:
936:
931:
926:
921:
916:
911:
906:
901:
896:
894:Carrying wheel
891:
889:Beugniot lever
886:
881:
875:
873:
865:
864:
862:
861:
856:
854:Scheffel bogie
851:
846:
841:
836:
831:
826:
821:
816:
811:
806:
801:
796:
790:
788:
781:
780:
778:
777:
772:
767:
762:
757:
752:
747:
742:
737:
732:
727:
722:
717:
712:
707:
702:
696:
694:
687:
686:
684:
683:
681:Whyte notation
678:
673:
668:
662:
660:
654:
653:
651:
650:
645:
640:
635:
630:
625:
620:
615:
609:
607:
592:
591:
583:
582:
575:
568:
560:
554:
553:
547:
539:
538:External links
536:
534:
533:
524:
517:
495:
488:
466:
459:
437:
430:
409:
402:
380:
371:
354:
329:
319:
317:
314:
313:
312:
302:
296:
284:
281:
233:
230:
212:
209:
203:
200:
153:
150:
90:United Kingdom
75:
72:
26:
9:
6:
4:
3:
2:
2033:
2022:
2019:
2018:
2016:
2001:
1998:
1996:
1993:
1991:
1988:
1986:
1983:
1981:
1978:
1976:
1975:
1971:
1966:
1963:
1960:
1959:
1954:
1953:
1952:
1949:
1947:
1944:
1943:
1941:
1937:
1926:
1923:
1920:
1917:
1916:
1914:
1912:
1908:
1901:
1900:
1896:
1893:
1890:
1889:
1887:
1885:
1881:
1874:
1871:
1870:
1868:
1866:
1862:
1853:
1850:
1847:
1844:
1841:
1838:
1835:
1834:
1833:Puffing Devil
1830:
1829:
1828:
1825:
1824:
1822:
1820:
1819:High-pressure
1816:
1805:
1802:
1799:
1796:
1793:
1790:
1787:
1784:
1781:
1778:
1777:
1775:
1773:
1772:Rotative beam
1769:
1762:
1761:
1757:
1754:
1751:
1748:
1745:
1742:
1741:
1737:
1734:
1731:
1730:
1728:
1726:
1722:
1719:
1717:
1713:
1706:
1703:
1700:
1699:
1695:
1692:
1689:
1688:
1686:
1684:
1680:
1673:
1672:Savery Engine
1670:
1669:
1667:
1665:
1661:
1658:
1656:
1652:
1646:
1645:Working fluid
1643:
1641:
1638:
1636:
1633:
1631:
1628:
1626:
1623:
1621:
1618:
1616:
1613:
1611:
1608:
1606:
1603:
1601:
1598:
1596:
1593:
1591:
1588:
1586:
1583:
1581:
1578:
1577:
1575:
1571:
1565:
1562:
1560:
1557:
1555:
1552:
1550:
1547:
1545:
1542:
1540:
1537:
1536:
1534:
1532:
1528:
1522:
1519:
1517:
1514:
1512:
1509:
1508:
1506:
1504:
1500:
1490:
1487:
1485:
1482:
1480:
1477:
1476:
1474:
1470:
1464:
1461:
1459:
1456:
1454:
1451:
1449:
1446:
1444:
1441:
1439:
1436:
1434:
1431:
1430:
1428:
1426:
1422:
1416:
1413:
1411:
1408:
1406:
1403:
1402:
1400:
1398:
1394:
1388:
1385:
1383:
1380:
1378:
1375:
1373:
1370:
1368:
1365:
1363:
1360:
1358:
1355:
1354:
1352:
1348:
1345:
1343:
1339:
1333:
1330:
1328:
1325:
1323:
1322:Rotative beam
1320:
1318:
1315:
1313:
1310:
1308:
1305:
1303:
1300:
1299:hypocycloidal
1297:
1294:
1292:
1289:
1287:
1284:
1282:
1279:
1277:
1274:
1272:
1269:
1267:
1264:
1263:
1261:
1259:
1255:
1245:
1242:
1240:
1237:
1235:
1232:
1230:
1227:
1225:
1222:
1220:
1217:
1215:
1212:
1210:
1207:
1205:
1202:
1200:
1197:
1195:
1192:
1191:
1189:
1187:
1183:
1177:
1174:
1172:
1169:
1167:
1164:
1162:
1159:
1157:
1154:
1152:
1149:
1145:
1142:
1141:
1140:
1137:
1136:
1134:
1130:
1127:
1125:
1121:
1115:
1112:
1110:
1107:
1105:
1102:
1100:
1097:
1095:
1092:
1091:
1089:
1085:
1081:
1080:Steam engines
1074:
1069:
1067:
1062:
1060:
1055:
1054:
1051:
1039:
1036:
1034:
1031:
1029:
1026:
1025:
1023:
1020:
1015:
1009:
1006:
1004:
1001:
999:
996:
994:
991:
989:
986:
984:
981:
980:
978:
975:
971:
965:
962:
960:
957:
955:
952:
950:
947:
945:
942:
940:
937:
935:
932:
930:
929:Leading wheel
927:
925:
922:
920:
917:
915:
914:Gölsdorf axle
912:
910:
907:
905:
904:Driving wheel
902:
900:
899:Coupled wheel
897:
895:
892:
890:
887:
885:
882:
880:
877:
876:
874:
871:
866:
860:
857:
855:
852:
850:
847:
845:
842:
840:
837:
835:
832:
830:
827:
825:
824:Grovers bogie
822:
820:
817:
815:
812:
810:
807:
805:
802:
800:
799:Arnoux system
797:
795:
792:
791:
789:
786:
782:
776:
773:
771:
768:
766:
763:
761:
758:
756:
753:
751:
748:
746:
743:
741:
738:
736:
733:
731:
728:
726:
723:
721:
718:
716:
713:
711:
710:Bagnall–Price
708:
706:
703:
701:
698:
697:
695:
692:
688:
682:
679:
677:
674:
672:
669:
667:
664:
663:
661:
659:
655:
649:
646:
644:
641:
639:
636:
634:
631:
629:
626:
624:
621:
619:
616:
614:
611:
610:
608:
606:
602:
597:
593:
588:
581:
576:
574:
569:
567:
562:
561:
558:
551:
548:
545:
542:
541:
528:
520:
514:
510:
506:
499:
491:
489:1-874103-98-4
485:
481:
477:
470:
462:
460:1-874103-93-3
456:
452:
448:
441:
433:
431:1-85260-020-9
427:
423:
419:
413:
405:
403:0-7153-7385-4
399:
395:
391:
384:
375:
368:
367:0-486-23818-0
364:
358:
343:
339:
333:
324:
320:
310:
306:
303:
300:
297:
294:
290:
287:
286:
280:
278:
274:
273:
268:
264:
260:
256:
252:
248:
244:
239:
229:
226:
217:
208:
199:
197:
193:
189:
184:
180:
178:
174:
170:
165:
162:
158:
149:
147:
143:
138:
136:
135:“notching up”
132:
127:
122:
118:
114:
105:
101:
99:
98:United States
95:
94:V-hook motion
91:
87:
86:
82:was known as
81:
71:
69:
65:
64:steam engines
61:
57:
56:shifting link
53:
49:
40:
32:
19:
1985:Modern steam
1972:
1957:
1919:Porter-Allen
1898:
1832:
1759:
1739:
1696:
1630:Safety valve
1559:"Pickle-pot"
1453:Thimble tube
1198:
944:Railway tire
870:running gear
829:Jacobs bogie
809:Bissel truck
769:
598:positioning
527:
504:
498:
479:
476:Essery, R.J.
469:
450:
447:Essery, R.J.
440:
421:
412:
389:
383:
374:
357:
346:. Retrieved
332:
323:
271:
235:
225:Daniel Gooch
222:
205:
185:
181:
166:
160:
155:
152:Applications
139:
134:
131:"linking up"
130:
120:
119:worked by a
110:
93:
83:
77:
55:
51:
47:
45:
1716:Watt engine
1516:Oscillating
1472:Boiler feed
1317:Plate chain
1296:Tusi couple
1209:Walschaerts
1094:Atmospheric
959:Train wheel
939:Radial axle
919:Journal box
839:Mason Bogie
775:Walschaerts
613:Cab forward
202:Derivatives
157:Abner Doble
142:Walschaerts
126:cutting off
1925:Ljungström
1911:High-speed
1804:Lap Engine
1760:Resolution
1664:Precursors
1549:Kirchweger
1511:Locomotive
1458:Three-drum
1438:Field-tube
1405:Locomotive
1387:Lancashire
1307:Link chain
1291:Crankshaft
1258:Mechanisms
1186:Valve gear
879:Adams axle
844:Pony truck
814:Blomberg B
770:Stephenson
755:Kuhn slide
691:Valve gear
623:Steeplecab
601:Short hood
587:Locomotive
418:Nock, O.S.
348:2015-11-05
316:References
146:eccentrics
117:bell crank
85:gab motion
60:valve gear
1956:Cugnot's
1899:Salamanca
1600:Hydrolock
1585:Crosshead
1531:Condenser
1367:Egg-ended
1028:Blastpipe
745:Hackworth
638:Cowl unit
633:Hood unit
618:Sharknose
605:Long hood
173:steam car
121:reach rod
2015:Category
1939:See also
1865:Compound
1740:Old Bess
1580:Blowback
1503:Cylinder
1489:Injector
1448:Stirling
1443:Sentinel
1357:Haystack
1271:Cataract
1244:Southern
1234:Caprotti
1109:Compound
1033:Smokebox
1021:elements
998:Lemaître
964:Wheelset
872:elements
765:Southern
725:Caprotti
628:Cab unit
478:(2004).
420:(1989).
342:Archived
283:See also
196:no. 4767
1655:History
1564:Surface
1382:Cornish
1342:Boilers
1224:Corliss
1161:Corliss
1144:D slide
1114:Uniflow
1104:Cornish
1038:Chimney
1017:Common
1008:Lemprex
988:Kylchap
884:Axlebox
740:Gresley
720:Bulleid
715:Baguley
544:Diagram
272:Dolgoch
259:0-4-0TT
96:in the
88:in the
1967:(1784)
1961:(1769)
1927:(1908)
1921:(1862)
1902:(1812)
1894:(1805)
1884:Murray
1875:(1803)
1854:(1804)
1848:(1803)
1842:(1803)
1836:(1801)
1806:(1788)
1800:(1786)
1794:(1785)
1788:(1783)
1782:(1782)
1763:(1781)
1755:(1779)
1749:(1778)
1743:(1777)
1735:(1768)
1707:(1795)
1701:(1760)
1693:(1725)
1674:(1698)
1640:Stroke
1605:Piston
1590:Cutoff
1463:Yarrow
1415:Launch
1410:Scotch
1171:Sleeve
1166:Poppet
1151:Piston
1132:Valves
1124:Valves
1003:Lempor
993:Kylpor
868:Other
643:Boxcab
589:design
515:
486:
457:
428:
400:
365:
1573:Other
1377:Flued
1362:Wagon
1286:Crank
1229:Lentz
1219:Baker
1214:Allan
1139:Slide
983:Giesl
976:types
787:types
785:Bogie
760:Lentz
735:Gooch
705:Baker
700:Allan
693:types
1725:Beam
1266:Beam
1176:Bash
1156:Drop
1099:Watt
513:ISBN
509:RCTS
484:ISBN
455:ISBN
426:ISBN
398:ISBN
363:ISBN
251:1366
249:and
247:1361
46:The
1544:Jet
1372:Box
1204:Joy
1194:Gab
750:Joy
730:Gab
596:Cab
265:).
257:'s
245:'s
133:or
92:and
54:or
50:or
2017::
603:/
340:.
171:,
1072:e
1065:t
1058:v
579:e
572:t
565:v
521:.
492:.
463:.
434:.
406:.
351:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
.jpg)
