Patents Completed.
Page 24
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Complete specifications of the following patents will be sent to any address in the United Kingdom upon receipt of eightpence per copy at the Sale Branch, Patent Office, Holborn, W.C.
INTERNAL COMBUSTION LOCOMOTIV E.—Leroux and Another.—No. 24.851, dated 28th October, 1909. Date claimed under Convention, 28th October,
1908.—This specification describes an internal-combustion locomotive which is :11) arranged that it may be used in such places as mines, powder magazines and oil mills. The motor and magneto are completely cased, and safety devices are provided. The air inlet passes through a nest of fine tubes which prevent any flame's passing outwards in the event of hack-firing. A flap valve similarly prevents any flame's passing to the carluiretter. The exhaust gases are cooled y passing them through a chamber in which water is splashed about by a paddle-wheel which is made to revolve by the flow of the exhaust gases themselves. After passing through another nest of fine tubes, the exhaust is allowed to escape. The fuel reservoir is constructed of a number of tubes connected to a receiver, the whole being contained in a sheet-iron case which is filled with sand. A filling device is described in which various valves automatically prevent the loss or leakage of fuel.
SCAVENGING OF ENGINES. — Wolseley Tool and Motor Car Co., Ltd. —No. 15,805, dated 7th July. 1909.—In this specification is described a valve gear and the general arrangement uf an engine in which compressed-air supply is obtained for scavenging and for supply ing the fuel. The distribution valve for the air and fuel, which is driven by a two-to-one gear, consists of two concentric tubes, forming a central space through which fuel is delivered, and an
annular space through which the compressed am is delivered. Air is compressed in the crankcase, and is delivered by means of suitable ports in the annular space to the cylinder at the end of the combustion stroke. Additional air is delivered through the annular space to a reservoir, and it is there stored under pressure. The air entering the cylinder for scavenging purposes acts as a cushion on the return stroke, and at the end of the next outward stroke escapes through the exhaust. At the same time, the compressed air from the reservoir passes through the carburetter and the central
valve space into the cylinder by the inlet port, carrying with it a fuel charge ready for compression. It will be seen that by this construction there is no valve, or port in the combustion chamber.
MOTOR-DRIVEN ROAD ROLLER.— A. Laffly.—No. 21,571 of 1909. Dated 21st September, 1909. Date claimed under the Convention, 2nd April, 1909.— The road roller as described is actuated by an explosion motor. The general ap
pearance is similar to that of a steam roller, the cylindrical body corresponding to the boiler forms a large tank for the cooling water and thereby necessitates only a comparatively-small radiator. The '-'hole of the driving gear—comprising the motor, clutches and change-speed and reversielll mechani.sm—tegether with the controlling levers, as so arranged in one block between the driving wheels that it can readily be dismounted for repairs. The speed-change and reversing mechanism is adapted to give the same two speeds in both directions. The two bevel wheels (J1 J2) on the shaft (J) are driven from the engine shaft in opposite directions. The clutch (j) which is situa.ted between them enables the shaft (J) and the gears (j1 j2) to be driven in either direction. The high or low speed is then obtained by putting the clutch (k) into connection with k1 or k2.
STEAM BOILER.—Drummond.—No. 13,102, dated 3rd June. 1909.—In this boiler is arranged a series of water tubes in parallel, and special devices are provided to ensure the uniform supply of water to the evaporating element. The feed water enters by way of a pipe to the feed heater, which latter consists of a tube of small bore that is arranged in several transverse loops in the boiler. This tube is made small, so that the water passing through at a high velocity does not deposit any impurities, but carries them into the larger tube. Such deposit can then be blown off at intervals through the blow-cock. The water afterwards enters the heating tubes proper, past a ball-valve, This valve is opened by the expansion of a metal rod inside the tube, the expansion being due to the increase in temperature consequent upon the water's being evaporated. Thus these tubes cannot be overheate.:4, as more water is supplied as soon as the temperature rises. The steam which may not be quite dry. passes by certain tubes, where most of the moisture is evaporated, through the ball valve to another tube, from which in turn it is led to the superheater. The heating ele ment proper consists of a down-take pine and of upwardly-sloping tubes where the main formation of steam takes place.