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.
INTERNAL COMBUSTION ENGINE.—Burt and Argylls, Ltd.—No. 18,140, dated 6th August, 1909.—This invention relates to an internal-combustion engine which is stated to he simple, efficient and practically noiseless. It is of the type in which a valve sleeve is arranged in the cylinder and in which the piston works. This sleeve provides the inlet and exhaust ports by moving so as to register its ports with the ports in the cylinder wall. The particular feature of this engine is that the valve sleeve is given both a longitudinal and a rotative reciprocating motion. This is accomplished by coupling it to a pin which is socketed in a rotating disc, chain driven at half speed from the crankshaft. The lateral motion of the pin provides the slight rotative movement, while the vertical motion of the pin provides the longitudinal movement of the sleeve. The cylinder bead is arranged to project well into the cylinder and is provided with a recess round it into which the valve sleeve can move. During the compression and explosion strokes. the sleeve is moved up into this recess far enough to cover the ports in the sleeve, so that the cylinder walls present an unbroken surface to the highpressure gas.
WORM GEARS.— Lamplongh.— No. 23.959, dated 19th October, 1909.—lit transmitting power by worm gearing. the end thrust obtained where a single
worm is used is obviated by using two worms, one right-handed and one lefthanded on the same shaft. Worm wheels on the opposite sides of the shaft engage with each of these. Gear wheels fast on the worm-wheel shafts mesh with a gear on the driven shaft. For motor vehicles, a differential gear is incorporated in the worm wheels or else iii the gear wheel oil the driven shaft.
DETACHABLE WHEEL—Alldays and Onions Engineering Company.—No. 22,949, dated 7th October, 1909.—This specification describes a method for locking wheels on to hubs or live axles. It is described and illustrated in the case of a hub. A screw thread is formed on the inner portion of that part of the hub which projects from the detachable wheel. The outer portion of the same part is turned down level with the bottom of the thread. A screw nut or cap is screwed on to the hub and is prevented from rotating by a helical spring, preferably of square-section wire, which is fixed at one end to the cap, and whose other end lies in a recess in the cap. This spring is so arranged that, if a force is applied to twist the cap off, the spring binds on to the hub a ad locks the cap. When it is necessary to remove the cap, the free end of the spring is lifted by a cam clear of the huh. This prevents its binding when the cap is unscrewed. An alternative arrangement is described in which the outer portion of the hub is all screwed, and the spring of suitable section is laid in the threads.
CARBURETTER. — Parker. — No. 19,076, dated 19th August, 1909.—In this specification is described a carburetter for use with an engine which uses either light or heavy hydrocarbons according to circumstances. A method of regulating the primary and additional air inlets is also described. Two float chambers. for the two kinds of fuel are situated diametrically opposite one another. In the conduit between them a three-way conical cock is provided, which also has a vertical outlet to the jet, so that it may thereby be placed in communication with either float chamber. The jet is surrounded by a tube which is conical or has helical grooves formed in it to lead the primary air in an eddy round the jet. The secondary air supply is taken through two large tubes which surround the jet. These tubes are relatively rotatable for the purpose of bringing the ports with which they are furnished more or less into register to vary the air supply. A throttle valve is described but not claimed, in which two plates with square holes are super-imposed and are movable relatively to vary the orifice.
DRIVING MOTOR PLOUGHS.— Kohn and Another.—No. 28,932, 10th December, 1909.—This invention relates to improvements in motor ploughs, such as are described in PatentNo. 15.310;1909; it consists in providing a pair of endless parallel chains carried on chain wheels fixed to the frame. These chains carry sprags which can be held vertically or tilted backwards or forwards. The sprags enter the ground and, on driving the chain wheels round, the vehicle is made to travel. Suitable guides are provided underneath the vehicle on which the sprags are supported, and which take the thrust due to the driving effort. There is also provided a belt or chain drive from the chain wheels on the rear road wheels and this is used when crossing or travelling on roads. The power is obtained from an ordinary motor fixed on the front of the vehicle and driving through speed-reducing and reversing gear.