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Title: |
1891 Article-Charles Burrell & Sons, Ltd., 8 H. P. Compound Steam Road Locomotive |
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Source: |
Engineering Magazine, V 72, 11 Sep 1891 pg. 210 |
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Insert Date: |
3/14/2013 1:10:18 PM |
EIGHT-HORSE COMPOUND ROAD LOCOMOTIVE.
The engine which we illustrate above was shown at the last Royal Agricultural Society's show, and was built to the following specification :—
General construction.—The engine to be of improved construction, with a locomotive boiler, patent compound cylinders—single-crank system--and mounted on springs, Burrell's patent. The engine to be of extra strength through-out, to stand continuous heavy haulage.
Overall dimensions.—Extreme length of engine over all, 17 ft. 9 in.; extreme width over driving-wheels, 7 ft. 7 in.; extreme height to top of fly-wheel, 9 ft. 1 in.
Boiler.—To be of the most improved locomotive type, with internal fire-box suitable for burning coal as fuel, strongly stayed at the ends and sides by 7/8 in. screwed stays, and at the top by girder stays connected to a T-iron, riveted to the shell-plate above. Shell-plates to be of best mild steel 3/8 in. thick. Fire-box plates to be of special steel 3/8 in. thick, with solid foundation and fire-door rings, and a 3 in. water space. All plates to be planed on the edges, and riveted by hydraulic machinery. Longitudinal seems to be double riveted, and the boiler to be of sufficient strength throughout to with-stand 5 continuous working pressure of 160 lbs. per square inch, and to be tested with water pressure to 275 lbs. per square inch. To be lagged with wood, and neatly cased with sheet iron. To be fitted with forty-one best high-pressure lap-welded iron tubes, 2 in. external diameter and 5 ft. 8 in. long, a strong smoke-box with circular door and tightening screws, furnace bars, small manhole in smoke-box, and mud-holes for washing out, metallic packed water gauge, all fittings to be of best gun-metal and gland packed, two gauge cocks, fusible plug in crown of fire-box, sliding fire door worked by levers, wrought iron chimney bolted to cast base.
Proportions—Heating surface of fire-box, 32 square feet; heating surface of tubes, 119 square feet; total, 151 square feet. Grate area, 5.37 square feet.
Cylinders—To be upon the compound system—Burrell's patent—arranged diagonally one over the other, high-pressure cylinder 6¼ in., and low-pressure cylinder 11 in. diameter, each with stroke of 12 in. To be steam jacketed and having the stop valve and equilibrium throttle contained in one casting, and arranged to carry two Ramsbottom spring safety valves, each 2 in. diameter. Cylinders to be of the very best cold blast cast iron, as hard as can be bored.
Slide valves—The slide valves to be of the same class of iron as the cylinders, to insure uniformity of wear, and to be driven by one link motion, valve rods of steel, with solid ends in valve chests, avoiding the use of nuts.
Pistons.—To be metallic packed, and fitted with hand cast iron rings, of the Ramsbottom type.
Piston-rods and crosshead.—Both piston-rods of steel 1½ in. diameter, connected to one crosshead of best malleable iron lined with cast iron metal, the guide blocks of which to be 12 in. long over all.
Link motion.—The link motion reversing gear to be of the best faggotted scrap Yorkshire iron, with extra large wearing surfaces and pins, to be carefully fitted, deeply case-hardened, and finished bright.
Motion bars.—To be four in number, of best mild steel, each 2 in. by 13/8 in., accurately planed and fitted with lubricators, supported by the cylinder cover at one end and by a strong cast bracket at the other.
Governors.—-High speed governors of the cross-arm type, with a powerful spring and large wearing surfaces, to be fitted so as to control the engine for stationary purposes with great sensitiveness. All levers and joints to be deeply case-hardened and finished bright.
Feed pumps.—A continuous acting feed pump, to be placed in a convenient position, and worked from the foot-plate. To be fitted with valves of large area and short lift, so as to reduce wear and tear and work quietly. Pump plunger, valves, and cocks to he of gun-metal.
Connecting rod.—To be of best forged scrap iron, turned and polished, and fitted with large adjustable bearings at both ends. The large end bearing to be 4 in. wide, and adjustable with a cotter strap secured by two turned bolts in the most solid manner.
Lubrication.—Two large lubricators to be fitted to the cylinders, and all bearings to be provided with efficient lubricating arrangements throughout the engine.
Crank-shaft.—To be of wrought iron, in one piece, without a weld, 3¾ in. in diameter, and carried in gun-metal adjustable bearings 6 in. and 8 in. long. Crank pin to be 4¾ in. diameter by 4 in. long.
Counter-shaft and. cannon bracket.—To be of steel, and carried by a crucible steel cannon bracket extending across the engine, and accurately turned to fit holes in the horn plates, which are thus rigidly supported. One end to be carried through the plates, to form a bearing for the spur-wheel, and the other enclosing the sliding bearing of the 12 in. long. These brackets are to be carried by two volute springs, and arranged on Burrell’s patent.
Gearing.—First motion 2 in. pitch, 3 in. wide on teeth; second motion 2 in. pitch, 3 in. wide on teeth; last motion 2¼ in. pitch, 4 in. wide on teeth. Compensating gear fitted with three pinions instead of two. The whole of the gearing throughout the engine to be of crucible cast steel.
Wheels.—The driving-wheels to be Boulton'a patent, 6 ft. 6 in. diameter and 16 in. wide, with cast bosses and specially strong spokes, and fitted with brass bushes. Front wheels to be 4 ft. 1¼ in. diameter and 9 in. wide, with rims of strong T section, and bosses fitted with chilled cast iron bushes 12 in.
long, and to be riveted throughout.
Fly-wheel.—F1y-wheel 4 ft. 4 in. diameter upon the crank shaft, by 6 in. wide, and arranged to run at 170 revolutions per minute when driving stationary machinery.
Fore carriage.—To be entirely of iron, and carried under the smoke-box by a stout plate, and arranged to control the locking of the wheels, thus dispensing with lock chains. Front axle arranged to rook upon a horizontal pin, to give a true mechanical motion on uneven ground.
Steerage.—The steering gear to be conveniently placed for working from the foot-plate.
Brake.—A powerful hand-screw brake to be fitted upon shaft.
Main axle.—The main axle to be of Kirkstall rolled iron, turned to 5½ in. diameter, and carried by two brackets of crucible cast steel, with bearings of Richards’ patent metal, soft ground and pins for ditto, a. set of frost studs and cotters, complete set of firing tools, clinker shovel, mud rake, tube brush and rod, bucket, funnel, hand hammer, crowbar, spare fusible plug, cold chisels, half gallon tin of oil and oil feeder, Main axle.—The main axle to be of Kirkstall rolled iron, turned to 5½ in. diameter, and carried by two brackets of crucible cast steel, with bearings of Richards’ patent metal, soft ground and pins for ditto, a. set of frost studs and cotters, complete set of firing tools, clinker shovel, mud rake, tube brush and rod, bucket, funnel, hand hammer, crowbar, spare fusible plug, cold chisels, half gallon tin of oil and oil feeder,
three spare gauge glasses end rings.
General remarks.—The whole of the above to be of the very best materials, and the workmanship throughout to be of the highest description. The engine to be painted with three coats of best oil colour, neatly lined and finished with two coats of varnish in superior style.
three spare gauge glasses end rings.
General remarks.—The whole of the above to be of the very best materials, and the workmanship throughout to be of the highest description. The engine to be painted with three coats of best oil colour, neatly lined and finished with two coats of varnish in superior style.
Image Courtesy Grace's Guide
http://www.gracesguide.co.uk/File:Im1891EnV72-p210.jpg |
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1891 Charles Burrell & Sons, Ltd., 8 H. P. Compound Steam Road Locomotive
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