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 Sales Branch, Patent Office, Holborn,
WRENCHES.—Thomas Smith and and Son, of Saltley. Ltd.—No. 1,929, dated 25th January, 1910.—This invention relates to wrenches, and it consists in substituting pieces of soft metal such as copper, delta metal, aluminium or lead for the usual tooth gripping portion of the jaws. When the wrench is used for the purpose of turning a nut or other article, the milled portion of the nut bites the soft portion of the jaw, thus enabling a firm grip of the nut to be obtained without damaging its edges. Several methods are suggested for securing the soft pieces of the metal to the of the wrench.
AUTOMOBILES. — Wilford. — No. 23,363, dated 12th October, 1909.—A road vehicle is here shown having an internal-combustion engine situated over the rear wheels. The four road wheels of the vehicle are driven by worm gearing, an intermediate link of hard rubber being provided between the driving shaft and the worm, in order to obtain an elastic drive. The vehicle is steered through the front axle and a special water-cooling device for the cylinders is shown above the engine.
INTERNAL-COMBUSTION ENGINE. —Richards and Another.—No. 28.767. dated 9th December, 1909.—This engine is provided with a reciprocating piston valve, adapted to control both the inlet and the exhaust ports. The piston is arranged in the head of the cylinder and is provided with a reduced portion that
extends into an extension of the cylinder head. The piston is actuated by a rocking lever, which is in turn operated from a cam on the half-time shaft. The inlet port is situated in the wall of the extension of the cylinder, and the exhaust port. is arranged in the main wall of the cylinder. These ports are covered and uncovered at the proper moment by the reciprocating piston valve, which latter has an inlet port communicating with a central passage within the piston that communicates with the combustion chamber. In order to equalize the pressure on both sides of the piston valve, a number of holes is provided in the piston, and these communicate with the upper side of the piston ; they are conveniently employed to convey the exhaust gases to the exhaust port.
INFLATION OF PNEUMATIC TIRES.--Maxim.—No. 8.703;1910, dated under Convention 13th July, 1909.—According to this invention, provision is made for inflating the tires of a vehicle with the exhaust gases from the engine A tube is led from the exhaust chamber
to one of the cylinders and is carried te the dashboard, where it is wound in the form of a coil. A flexible tube is employed for connecting this point with the tire, suitable cocks being provided. In order that the engine should develop sufficient power to overcome back pressure on the exhaust, it is desirable that the engine should be running under load. It is therefore arranged, according to this invention, that three of the cylinders (in the ease of a four-cylinder en
gine) should be cut out and should be employed to load the fourth cylinder, the exhaust of which is used for inflating the tire. A suitable switch, which can be operated from the dashboard, and which cuts off the ignition to the three cylinders, is provided.
COMPOUND STEAM MOTOR.— Lamplough and Others.—No. 17,607. dated 29th July, 1909.—This invention relates to a steam motor which is adapted for use with steam at a very-high pressure, say, anything up to 1,000 lb. per sq. in.. or even higher. The high-pressure.
cylinder is situated within the low-pressure piston, and the bigh-pressure piston: is fixed. A suitable arrangement of tappet valves serves to control the admission and the exhaust for the cylinders.