Patents Completed.
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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,
TWO-CYCLE ENGINE. -Valente fla Cruz.—No. 11,363, 13th May, 1909.— This invention relates to two-cycle engines of the type in which the cylinder is scavenged by the fresh explosive mixture's being admitted to the latter before the inert gases have been completely exhausted from the cylinder. One of its principal objects is to prevent premature ignition. Within the usual ater-jacketed cylinder is arranged a second cylinder, which is adapted to reciprocate within the first cylinder and which drives a crankshaft by means of connecting-rods situated at opposite points of the reciprocating cylinder. Mounted within the reciprocating cylin der is a stationary piston, which is pre
ferably water-cooled. To one side of the engine a piston and a cylindrical sleeve valve is arranged within a suitable 'valve-casing, the two valves being connected so as to slide together by means of a suitable spindle. The cylindrical sleeve valve is connected by a rod to an eccentric mounted on a countershaft that is in gear with the crankshaft. Within the sleeve valve is a piston which is also attached, by means of a connecting-rod to a crank on the countershaft. The cylinders are provided with two in let ports and one exhaust port, a separate inlet port being provided for the fuel and the air respectively ; these
ports are adapted to be uncovered it the proper moment by the stationary piston.
The operation of the engine is as follows. Assuming the parts to be in the position shown in the left-hand drawing, and that, at this stage, the explosive mixture is compressed between the stationary piston and the reciprocating cylinder, on ignition taking place, the reciprocating cylinder is forced upwards and the air contained within the space above the reciprocating cylinder is compressed and forced into the valvechamber. During this time, fuel is admitted between the sliding sleeve valve and the piston within the latter, where it is compressed and forced into a re servoir that partly surrounds the engine cylinder. On the reCiprocating cylin der nearing the limit of its upward stroke, the exhaust port is uncovered and the inert gases at once start to escape ; further movement of the piston in its upward direction uncovers the inner port for the compressed air, which latter expels the remaining inert gases. Finally, the second inlet port is opened aunt tbe fuel is thus admitted to the cylinder. On the downward stroke of the reciprocating cylinder, the mixture of air and fuel is compressed and the cycle of operations is repeated.
TIRE LEVER.—Bobbett and Others. —No. 1,250, dated 18th January, 1909.— This lever is provided with a hooked end which is adapted to engage the rim of the wheel as shown. In order to prevent it from slipping further inside the rim, an arm is pivoted to the lever, and this arm is adapted to abut against the rim and to act as a fulcrum when the tire is being forced on to the rim by the lever. The pivoted arm may be adjustable on the lever.
ELECTRIC HAND LAMP—Fuller.---No. 803, dated 13th January, 1909.— This lamp comprises a wooden handle which is centrally bored to receive the flex or electrical conductors, and it terminates in an enlarged head. The head of the handle is recessed to receive the lamp-holder and is also provided with an external groove adapted to accommodate the inturned edges of an expanded-metal guard. The guard is firmly held in place by a suitable clamping ring, but, should this clamping ring become loose, the guard will not become displaced owing to its inturned edges' engaging the aforementioned groove in the handle. A suitable cord-grip is provided for the purpose of gripping the flex where it enters the handle ; it thus prevents the latter from being accidentally discon nected from the terminals of the lampholder. A strip of leather is threaded through holes in the handle, and the ends of this strip are riveted together so as to form a loop whereby the lamp may be suspended.
INTERNAL COMBUSTION ENGIN-ES.— Cleaver.— No. 22,643, dated 24th October, 1908.—The invention relates to internal-combustion engines of the type having a rotating sleeve valve
which controls the inlet and exhaust ports. According to the present invention, the sleeve is interposed between the outer cylinder and an inner cylinder. The piston reciprocates in the usual manner within the inner cylinder. The sleeve valve is provided at its lower end with a bevelled gear, which meshes with a bevelled wheel that is driven from the crankshaft. In a multi-cylinder engine, the sleeves may all be geared together so that only one set of gearing from the crankshaft is necessary. It will be seen that, when the exhaust and inlet ports are covered by the sleeve valve (as. for instance, when explosion takes place within the cylinder), un equal pressure will be exerted on the valve, and, in order to compensate for this, a hole may be provided in the inner cylinder wall at a point opposite the inlet and exhaust ports.