Patents Completed.
Page 28
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Another Sleeve Engine.
J. D. Roots.—No. 20,256, dated 12th September, 1911.—In an engine constructed according to this invention, the cylinder is provided with two pairs of ports situated opposite one another, in two transverse planes. The upper pair of these ports registers with ports formed in the cylinder head, and the lower pair enters the cylinder at about the top of the piston stroke. A sleeve, with two ports diametrically opposite one another, controls the inlet and exhaust. Preferably the upper pair of cylinder ports is used for the exhaust, and the lower pair for the inlet. When used for a multicylinder engine, an exhaust and an inlet pipe are run along each side of the engine. so providing the necessary communication with all the cylinders.
Sell-starting Gear.
Sulzer Brothers, No. 3314 of 1912, dated under the International Convention, 15th April, 1911.—This invention consists in valve-operating gear for application to internal-combustion engines, which are started up by compressed air. The object of the invention is to provide mechanism by which the compression-releasing valve, and the compressedair-inlet valve which is used for starting,
can be regulated simultaneously. On the bell-crank there is pivoted an arm
which has a roller at one end which can be interposed between the cam and the valve-operating lever for the compressed air-inlet. In starting up, this member is pushed forward and causes the valve to be operated by the cam. The same member can also be used to engage the operating lever for the compressionrelease valve. The amount by which the bell-crank is rotated determines the extent to which the operation of the valves is removed from the normal.
A Governor-controlled Ignition.
G. W. Hutchinson, No. 8206, dated 26th September, 1911.—According to this invention, a centrifugal governor driven by the engine is coupled to a distributing switch which controls the sparking, thus,. as the speed of the engine varies, the time of sparking is also varied.
An Adjustable Worm Drive.
G. Kryn, No. 6288/12, dated under International Convention 26th August, 1911.—The worm-driven differential gear described in this specification is arranged to permit of the regulation of the distance between the axes of the worm and the worm wheel, and also to permit of the substitution for one worm and worm wheel of others, so giving a different speed ratio. The worm spindle is carried in an eccentric sleeve bearing.
A Duplicate-point Plug.
A. E. Fletcher.—No. 24,941, dated 9th November, 1911.--In this sparking plug the central terminal is forked, and the ends separated in a V so as to ap
proach a curved blade or tongue forming the other electrode. This tongue extends downwardly towards the centre of the plug, and so affords protection from any oil thrown up by the piston. Since the sparking points are duplicated, Ulf second gap is available for use when the first is burnt away.
A Novel Ignition.
A. H. Ott, H. Fanta and A. Ott.—No. 13.688/12, dated under International Convention, 12th July, 1911.—The ignition in a cylinder is provided by the use of ignition pins of pyrophorous material, preferably a hard alloy. A frictional surface is formed on a block
welded to the top of the piston, and this is arranged to engage the ignition pin at the top of every stroke so as to produce a series of sparks to ignite the charge. The top of the block is tapered so as to force back the ignition pin on the upward stroke of the piston. A stop is provided to limit the inward movement of the ignition pin, which is controlled by a spring so as to give the necessary pressure to produce the sparks. Various slight modifications of the general arrangement are described in the specification.
Hydraulic Operation of Brakes.
S. H. Shepherd, No. 20,173, dated 11th September, 1911.—According to the invention described in this specification, the pump normally. used to circulate the lubricating oil is arranged so that on certain occasions it may be used to apply a braking force to the vehicle. In the illustration given, the pump is shown towards the left-hand side, while at the centre of the figure there is shown a braking-cylinder which is coupled by a link to suitable braking mechanism, such as brake blocks. The pump and brake cylinder are connected by a conduit in which is situated a valve controlled by the driver, so that, at, will, the pump may be made to deliver oil to the brake cylinder to move the ram.