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Patents Completed.

8th June 1916, Page 22
8th June 1916
Page 22
Page 22, 8th June 1916 — Patents Completed.
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A de Dion Four-pole Magneto. Reinforced K.T. Tires. Using the Magneto as a Coil. Single-jet Carburetter Construction.

Copies of complete specifications of the patents published on this pare can be obtained from the Sales Branch, Patent Office, Holborn, W.C., at the cost of sixpence for each specification.

ErkBussEmENTs DE DION BOTITON, No. 16,614, dated under International Convention 17th June, 1915.—With an eightcylinder four-cycle engine it is necessary to produce four sparks per revolution of the engine, and since the ordinary construction of the magneto will only .give two sparks per revolution, it has been necessary to use a multiplying gear between the engine shaft and the magneto shaft. This additional gearing is rendered unnecessary by making a magneto which will give four sparks per revolution. At least two horseshoe magnets are mounted side by aide, and each magnet has a long and a short limb. The long limb• of one is magnetized similarly to the short limb of the other, and they are placed side by side. Pole-pieces are provided on all the limbs, and each is of a sufficient length axially to extend across both of the magnets. There are therefore provided two north poles on one side and two,south poles on the other side. The upper north pole is on the short arm of one magnet and the lower south pole is on the long arm of the same magnet-, the other south and north poles being similarly arranged on the other magnet.

E. B. KILLEN AND THE COMMERCIAL TYRE Co., No. 11,070, dated 30th July, 1915.—This invention consists of improvements in the construction of tires of the type in which air-filled studs are used. Movement and friction take place around the base of the studs, and according to this improvement a reinforcing ring is inserted at this 'rink The ring is of metal or other hard substance, and it is incoporated with the tire and vulcanized with it at the base of the air cells or cavities. The ring may be notched on its inner or outer edge, or on

both edges, These notches become filled with rubber and render the ring more secure.

In tires which are designed to carry only light loads a plug of wood may be inserted in the base of the air cavity instead of the reinforcing ring described above, J. W. T. CADETS AND C. PERCY, No. 5168, dated 6th April, 1915.—The object of this invention is to use the primary and secondary windings of a magneto like a coil when the engine is at rest so that the engine can be started on the switch alone. An auxiliary battery is provided and it is conneeted to a, trembler-coil which is in parallel with the primary winding of the magneto. .

A non-inductive resistance is kept in series with the primary winding in order to prevent excessive current being taken from the battery when the circuit is closed. The trembler on the auxiliary coil is arranged to make and break both of the parallel circuits so that an intermittent current ia supplied to the primary winding of the magneto. The secondary winding therefore gives a high voltage current which is conducted to the sparking plugs by the ordinary distributor. Instead of using a single battery, separate batteries may be used, one for operating the trembler coil and the other for supplying -the primary winding of the magneto, but for simplicity a single battery is used for both. purposes.

D. T. BROOK, No. 5503, dated. 12th April, 1915.—In this carburetter the fuel passes from the bat-feed-chamber into an auxiliary reservoir and. then into a circumferential channel around the air-inlet. The jets form, radial passages from this channel opening into the air-inlet, and they are controlled by

An auxiliary reservoir containing petrol for starting purposes is employed. • the throttle-valve. An auxiliary air,inlet is formed in the float-feed-chamber and the air is introduced by it to the top of the auxiliary reservoir. A salve controls this air and is operated at the same time as the throttle-valve, but in the reverse direction, so that the auxiliary air in shut off as the throttle-valve is opened. This construction is stated to give a rich mixture on starting as a result of the fuel standing in the auxiliary reservoir.

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