Kingdom. 1 RAILWAY AND MARINE MECHANISM. 215
North Areas A. B. 10 to 34 ; C. D. E. 1 to 10,
in one direction throughout the pipes, it has not to bestopped and started at every return-stroke, and is there-fore better able instantly to follow the pump-ram themoment it changes the direction of its motion.]
A portable high-pressure boiler of two-horse power,weighing 6 cwt. Complete in itself, and independent ofall fixings and foundations. Constructed for working thesteam-pump, and for several other engineering, agricul-tural, and domestic uses. The funnel is capable of beingunshipped and stowed away, thus rendering the wholeeasy of removal from place to place.—Provisionally regis-tered.
A portable high-pressure boiler, so constructed as tobe convenient for removal from place to place.
37 Evans, John, & Son, 104 Wardour Street , Oxford
Street —Manufacturers.
Six-horse power high-pressure oscillating steam-engine.Exhibited for simplicity of construction, economy inworking, and portability.—Patentees, Richard Want andGeorge Vernum, Enfield Lock, Middlesex.
38 Maudslay, Sons, 8 c Field, Lambeth — Designers,
Manufacturers, and Proprietors.
A small double cylinder direct-acting high-pressuresteam-engine, for working a coming-press .—See No. 228,Class 6.
A model of a gun metal screw-propeller, so con-structed that the blades can be turned fore and aft fromtheir proper position for propelling, and thus assume aline with the keel of the ship, so that, when steam-powerls not used, and the vessel is put under canvas alone, nonecessity exists for taking the propeller out of the water,as the blades will not offer any resistance to the progressof the ship.. The exhibitors have fitted 23 vessels withscrew machinery (some of the screw propellers being onthis plan) of the collective nominal power of 4,380 horses.
Patented by Joseph Maudslay.
Fig. 1 represents this screw-propeller when in use.Fig. 2 shows it when the vessel is under canvas alone.
A connecting rod, fitted with its bolts and brasses ;the latter lined with soft metal, and adapted to a pair ofpatent double cylinder marine steam-engines, of the col-lective nominal power of 800 horses.
A. model of a pair of direct-acting double cylindermarine steam-engines, fitted with paddle-wheels and im-
19 to 33; F. 1 to 32 ; G. H. 1 to 13, & 19 to 26.
proved feathering floats. On this plan the exhibitorshave constructed marine machinery, since the patentwas taken out, of the aggregate power of 19,130 horses,and some of them of 800 horses collective nominal power.—Joseph Maudslay and Joshua Field, patentees.
Figs. 3 and 4 represent these engines.
A model of a pair of direct-acting marine steam-engines, with oscillating cylinders; on which principlethe exhibitors have constructed engines of the aggre-gate nominal power of 2,100 horses.—Joseph Maudslay,patentee.
Figs. 5 and 6 represent these engines.
A model of a pair of direct-acting double piston-rod marine steam-engines, peculiarly adapted to shallowriver navigation. The exhibitors have made engines onthis plan for the Rhone, Indus, and Sutlej , of the aggre-gate nominal power of 545 horses.—Joseph Maudslay &Joshua Field, patentees.
Figs. 7 and 8 represent these engines.
A model of a pair of marine beam steam-engines, onwhich plan the exhibitors have completed 103 pairs, ofthe aggregate nominal power of 11,358 horses.
Figs. 9 and 10 represent an end and side elevation ofthese engines.
A model of a pair of direct-acting annular cylindermarine steam-engines, fitted with paddle-wheels andimproved feathering floats. These engines have beenfitted to some of the fastest packets in the Channel, andon this principle the exhibitors have manufactured 23pairs, of the aggregate nominal power of 2,250 horses.—Joseph Maudslay, patentee.
Figs. 11 and 12 represent these engines.
A model of a pair of horizontal cylinder direct-actingmarine steam-engines for driving a screw-propeller; soconstructed as to occupy little space, and to be altogetherbelow the water line.
Figs. 13 and 14 represent an end and side elevation ofthese direct-acting engines.
[These models are extremely interesting as illustrationsof the various forms of the steam-engine applied inmodem times to navigation. Propulsion by the paddleand by the screw, each require a peculiar adaptation ofprime movers; and those forms exhibited appear tocombine the features of construction deemed best adaptedfor these purposes. The connecting rod gives a forcibleimpression of the power of these stupendous engines.]
Fig. 1.
Maudslay's Patent Feathering Screw-propeller in Action.
Fig. 2. f