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PATENTS SUMMARIZED.

29th November 1917
Page 24
Page 24, 29th November 1917 — PATENTS SUMMARIZED.
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Which of the following most accurately describes the problem?

A Three-jet Paraffin Carburetter.

The main claim which is made by Henry Garner, of Alcester -Road, Birmingham, .in connectionwith his carburetter, is the incorporation of especial starting . carburetter. for using, petrel, Which is placed between the vaporizer and the engine, thus avoiding the possibility of trouble when it is necessary to use petrolalone for a period. In Stiell eases, whenever this provision is not made, there is trouble owing to excessive heating of the more volatile fuel.

• We TeOroduce one of four drawings • which are published 'with the specification. The petrol-carburetter is shown at the top; on the right, and it should be :noted that Cominunication between it and the engine is controlled by means of a, small cock. The paraffin carburetter is shown at the li3wer end, and the vaporizer, consisting of a chamber which is crossed by a number of tubes, through which the exhaust gases circulate, at the left.. The paraffin carburetterhas a cylindrical throttle valve and three jets. The smallest jet of the three is for starting, only, and is cut off as the second comes into operation. The two main jets are brought into use as the e,emand for power arises.

Mixing Heavy .Fuels in the Cylinder. .

Patent No. 110,175, byV. G. Lironi, ci 21, Cousins Grove, Southaea, is quite

inven

tions from the normal run of in connection with the use of

heavy .fuel. It dep.ends-for its success npun the principle of stratification of the

incoming ncoming.supplies of .fuel. The inventor does not concern himself with the carburetter at all, but with the valve gear of 'the engine. " His construction involves the use of three valves per Cylinder, two inlet valves,' and one exhaust. The latter is operated in the normal manner (the engine opexates on the usual Otto or four. stroke cycle). Of the two inlet valves, one opens at the usual time and admits the mixture containing the heavier fuel ; it closes before the cud of the induction stroke, simultaneously with, or a little before, the-opening of the other, which admits a mixture Containing petrol vapour.

The :result, it is claimed, is that a layer of easily exploded gas surrounds the sparking plug, which, on ignition,. sets fire to the heavier fuel.

A Novel Heavy Fuel Vaporizer.

Considerable. activity is still to be noted amoivist the world of inventors in connection with the vaporization of heavy fuels, particularly in regard to means of utilizing oils in petrol engines. Specification No. 110,199, published under the name of E. C. R. Marks, of 57, Lincoln's Inn Fields, ,W.C., but really describing the .invention by the Thurston Motor Fuel Gasifier Co., an American company, concerns a vaporiier iit which thescombined effeets of heat and ntzchanical interruption,, of the flow: of the fuel are together utilized iii order to form a combustible mixture The " upper Part of .the illustration which we .publish is principally affected by the patent under review, the lower portion being a carburetter of quite normal' and usual design. Carried on a flange above the throttle valve of the carburetter is a cylindrical chamber.. The construction of this chamber embodies an exhaust-heated jacket and a central passage tor -the mixture of air and oil fuel. Within, the intier chamber is an inverted truncated cone, the upper portion' of which is formed of wire. gauze or similar material, ud the

largest diameter of this is such that it practically closes the passage through the vaporizer, making it necessary for all the mixture to pass through the, gauze. , As the upper surface of this conical part is also of mesh, it follows that the mixture, on its way to the engine, has to pass through the gauze twice. With the exception of a few small holes,' which allow of very small portions of the mix

ture to enter, thus avoiding the possibility of the formation of a partial vacuum, and resultant turbulence, the lower, surface of this truncated cone is closed.

Thefl mixture then, deflected by the shape of the passage from the carburetter to the vaporizer, enters the latter at an angle and first strikes the heated inner walls of the exhaust jacket, where it is mainly gasified. It then has to pass twice through the gauze, which is itself, owing to its Proximity to the exhaust jacket, at a high temperature, and further conduces to the gasification of

A further advantage claimed for this arrangement is that any re-condensed mixture, flowing back from the induction manifold after a stoppage of the engine, is caught by the upper surface of the gauze, and is there retained until the engine is started again, when it serves as additional fuel to enrich the mixture for starting purposes.

Copies of complete specifications of each patent published on this page can be obtained from the Sales Branch, Patent Office, Chancery Lane, 1V.C., at a cost of 6d. for each specification.

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Organisations: Patent Office
Locations: Lincoln, Birmingham

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