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.
TIRES.—Wells and Ballard.—No. 2.289, dated 29th January, 1910.—This invention relates to tires of the type consisting of wooden blocks separated cir cumferentially by indiarnbber cushions. The blocks are arranged in channels on the rim and are formed with their ends concave to one another. The indiarubber pieces are held in place by convex wedge-shaped pieces.
BRAKES FOR STEERING WHEELS. —Allen and Another.—No. 17,352. dated 26th July, 1909.—In this arrangement the vertical fixed steering pivot has
formed on it at its upper end a quick. pitch thread. The actuating lever of the brake is arranged to give a partial rotation of a screwed cap. The longitudinal motion of this cap is transmitted to the expanding brake shoes by a lever and cam in the ordinary manner.
VALVES.—Robb and Another.—No. 10,874, dated 7th May, 1909.—This valve gear is particularly applicable to a fourcylinder engine in which the four valves are disposed at the four corners of a square. The essential features are the use of a central distributing valve and mushroom valves on each cylinder which are operated once in each complete cycle. The central valve consists of a diaphragm which divides its housing into an upper inlet portion and a lower exhaust portion. A pocket is formed in this valve, and a port. on the face of the pecket registers in turn with the various cylinder ports. The rotating valve is
connected to the cams which operate the cylinder valves. At the end of the explosion stroke the mushroom valve is opened and is kept open and a clear way left to the exhaust. As the central valve rotates the pocket first closes the cylinder port to the exhaust, then opens it to the inlet and finally closes it to the inlet; the mushroom valve is then closed and the Mixture in the cylinder is ready for ignition. As shown in the drawings, the central valve rotates clockwise and the charges in the
cylinders are ignited in the same order. Baffles or shields are provided to prevent circulation of the exhaust gases between the cylinders and to protect the surfaces of the central valve. This central valve which controls the supply of the mixture in the exhaust, is not subjected to the explosion pressure.
INTERNAL COMBUSTION ENGINES.—Robb and Another.—No. 10,763, dated 6th May, 1909.—This specification describes a balanced fourcylinder engine. The cylinders are arranged in two pairs and built up in sections. The lower section comprises the four cylinders proper and their waterjacket, the middle section the four combustion chambers and their water-jacket and the upper section the valve-chest
and its water-jacket. Baffles are arranged in the water-jackets which cause the water to circulate from the lower end of the cylinders round each section in turn and out at the top. Each transverse pair of cylinders operates a rocking lever which oscillates on a shaft fixed in the upper portion of the crankcase. These levers are coupled to the crankshaft by coupling rods connected near their ends. These rods are secured to the rocking lever by pins which are held in place by a collar on the pin and a bevelled plate which is held up by a stud against a bevel on the pin. When there is only one pin to be held up, as at one end of the
rocking lever, a bevelled atop is formed on the lever. The cranks are set et. 180 degrees to secure the balance of the engine,