GB Patent: GB-184,108,998
|
| Arrangement and combination of the parts of locomotive-engines
|
|
Patentee:
|
|
| Robert Stephenson (exact or similar names) - Westminster, England |
| Manufacturer: |
| Not known to have been produced |
|
|
Patent Dates:
|
| Granted: |
Jun. 23, 1841 |
Espacenet patent
Report data errors or omissions to steward
Jeff Joslin
|
|
Description: |
| From 1841 Mechanics' Magazine, volume 36 page 30: "The first of these improvements relates to the disposition and arrangement of the wheels of six-wheeled engines, and consists in disposing the axis of the hinder wheels beneath the hindmost end of the cylindrical part of the boiler; the said axis passing horizontally across in front of the foremost end of the fire-box, instead of behind the hindmost end thereof. But the straight axis of the foremost wheels is disposed as usual, or nearly so, that is, horizontally across beneath the foremost end of the cylindrical part of the boiler, so as to be beneath the stuff-boxes of the steam cylinder. The cranked axis of the main or propelling wheels is disposed horizontally across, beneath the cylindrical part of the boiler, at a suitable place in the interval between the foremost and the hindmost axles; such interval being that usually observed in six-wheeled engines. In a locomotive engine constructed agreeable to this improvement, the boiler will be longer than in the ordinary six-wheeled engines, and it evaporative powers proportionally increased."The second improvement is equally applicable to both four and six wheeled engines. It relates to the position of the slide-valves, steam-chest, &c., and consists in placing the slide-valves in vertical planes at the sides of the steam cylinders, so that the direction of the sliding motion of such valve, and the central line of each valve-rod, will intersect the central line of the main axis of the crank at the point where the eccentric is placed. In this case the eccentric rods are joined directly to prolongations of the valve-rods, without the usual intermediate levers or axes; and one steam-chest, placed between the two cylinders, contains the slide-valves belonging to each."The third improvement relates to a method of working the feed-pumps for supplying the boiler with water, and is applicable to all engines having two sets of eccentrics for working the slide-valves; it consists in jointing the piston-rods of the two feed-pumps to the half-hoops belonging to the eccentric rods, which are only used to work the slide-valves when the motion of the engine is reversed; so that the short reciprocating motion of these two eccentrics works the feed-pumps and keep the boiler supplied with water." |
|
