238 Class 5.— MACHINES FOR DIRECT USE, INCLUDING CARRIAGES, [United
Noeth Akeas A. B. 10 to 34; C. D. E. 1 to 10, & 19 to 33 ; F. 1 to 32 ; G. H. 1 to 13, & 19 to 26.
principal dimensions are the following:—Cylinders, 9inches in diameter; stroke, 12 inches; driving-wheels,4 feet 6 inches; and weight, in full working order, 13tons. It has been proved that this engine is capable ofworking express trains, of six first-class carriages, at aspeed of 60 miles per hour, consuming only 8 lbs. of cokeper mile; while, from the centre of gravity being verylow, and from the consequent steadiness of working atthe highest velocities, an increased degree of safety isobtained, besides doing little injury to the permanentway. It carries coke and water for stages of 50 miles,and is capable of ascending an incline with a greater loadthan any other engine, in proportion to the size of cylin-ders or expenditure of fuel.
510 Adams, W. Bridges, 1 Adam Street , Adelphi —Patentee and Designer.
Light locomotive engine for railways, named “ Ariel’sGirdle,” on four wheels, coupled to a four-wheeled com-posite tender ; it makes a steady eight-wheeled machine,capable of lateral flexure for sharp curves. The tendercontains water beneath the floor, and has a sledge break ofpeculiar construction, acting with friction on the rails tosave the wheels; its handle being within reach of the driver.
Eight-wheeled double railway carriage for first andsecond-class passengers. The wheels are left free tomove laterally by means of swinging links and shackles,which enable the carriage to run round curves of 250 feetradius. A sledge break of peculiar construction is sus-pended from this carriage. The locomotive engine pro-duced at the Airedale Foundry, Leeds, by Kitson, Thomp-son, and Hewitson; the carriage portion produced at Bir-mingham by Brown and Marshall.
A spring for the locomotive engine, formed of patentribbed steel; the rib, working in a corresponding hollowof the adjoining plate, reduces the friction and preservesthe parallelism of the plates.
Patent grease-tight axle-box.
Model of a patent fish-jointed rail, bedded to the upperlip in longitudinal timber .sleepers. Drawings illustratingthe mode of forming this railway. Drawings of patentcarriages, &c., low hung for agricultural railways. Anon-recoiling patent atmospheric railway buffer for ter-minal stations. _
512 London andNorth Western Railway Company—Stewart, C. E., Euston Square Station —Secretary.
Patent express locomotive engine, “ Liverpool,”—dia-meter of cylinders, 18 inches; length of stroke, 24 inches;diameter of driving wheels, 8 feet; heating surface intubes, 2136 feet; and in fire-box, 154 feet; weight inworking order, 32 tons; coke and water, 4 tons. Theevaporation of the boiler dt full work is equal to 1,140-horse power. Pressure of steam 120 lbs. per square inch.The engine has a very low boiler, and the greatest weightis on the extreme wheels, which insures steadiness. Ex-hibited for the great amount of heating surface, and thegeneral construction. Made by Messrs. Bury, Curtis,and Kennedy, of Liverpool. The patentee, T. R. Cramp-ton, 15 Buckingham Street, Adelphi, London . (SeePlate 23.) _
513 London and Northwestern Railway Company—Stewart, C. E., Euston Square Station —Secretary.
Narrow-gauge express engine, the “ Cornwall” (seethe following engraving), designed by Mr. Trevithick ,one of the locomotive superintendents of the London and Northwestern Railway. Cylinders, 17J inches indiameter; length of stroke, 2 feet; diameter of drivingwheels, 8 feet 6 inches; weight, 27 tons. Exhibited forimproved construction, in the form and position of theboiler, the size of wheels, &c. Made at the LocomotiveWorks of the London and North Western Railway atCrewe.
[The amount of power obtainable in a locomotive steam-engine is to be measured by the diameter of the cylinder,or rather by the area of the piston working in the cylinder,and the pressure of the steam; and the effect with whichthe power can be applied to produce speed as a result isdependent upon the rapidity with which steam can be pro-duced in the boiler; whilst the economy with which powercan be obtained and effect given to it are estimated by the
fuel consumed and by the absorption of power by the ma-chinery, together with the demand which the engine itselfand its tender make upon the otherwise available power.
The high pressure which yields power, and the rapidevaporation which gives the means of applying the powerdirectly to obtain speed, are dependent upon the effect withwhich heat can be applied to the water in the boiler ; andhence the amount of surface exposed by a boiler, in any