Patents Completed.
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A Drummond Tool Holder. A " G.C." Vaporizer. Variable-stroke Engines.
SOC. ANON. DES AUTOM OBITS DELA1.7NAY-BELLEVILLE, No. 11,456/1913, dated under International Convention let August, 1912.—Difficulty is experienced with the brake lining of internal brake shoes in that, as wear takes place, the rivets
which hold the lining in position stand out and score the brake drum; the ends of the material are also liable to be torn away. According to this invention an odd number of recesses are provided on the surface of the brake shoe to accommodate the rivets which hold the lining in place.
The method of attaching the lining to the shoe is of some importance. It is first fitted to the lowered surface of the shoe at one end and then stretched tightly to the other end and there secnred. The remainder of the fixing bolts are then tightened up in the recesses provided. This method ensures that the tension on the brake-hung is uniform.
G. CONSTANTINRSCO, No. 22,259, dated 30th September, 1912.—The object of this vaporizer is to provide means for easily starting an exhaust-heated vaporizer from cold and for maintaining a proportionate mixture to varying loads. In starting up, petrol or benzole is supplied to the float-feed chamber on the left and passes from there to the top of the chamber on the right and is controlled by a needle valve. When the engine is cranked round, some of. the fuel is drawn through and drops upon the cone-piece illustrated. Some of it is evaporated and passes to the engine, and the remainder is drained off by a conduit to an exhaust-heated vaporizer and is there vaporized, returning through the central passage into the cone. The vaporized mixture escapes from the cone and passes to the engine in the usual way. As soon as the vaporizer has been sufficiently warmed the spirit may be cut oft and heavier oil substituted. A. DRUMMOND, No. 20,187, dated 4th September, 1912.-This invention relates to the tool holders of turret lathes. The lathe-bed is fitted with a fixed guide bar and the ring turret, which is provided with holes to take the different tools, is accommodated on its periphery with projections having in them angular notches. These notches arc spaced in exact relationship to the holes which take the tools, so that when they slide on the fixed guide bar the tool will be in its correct position for use. The ring turret runs on a central shaft, and a locating stop is provided so that when it is required to change over a tool, the stops will always come against the guide bar in correct relation with the tool position.
T. S. JAmEs, No. 14,060, dated 17th June, 1912.—This invention relates to an internal-combustion engine in which the piston has a stroke of variable length for the purpose of completely freeing the cylinder from burnt gases, and also to increase the suction stroke so as to enable a greater charge of combustible gas than is usual to be drawn in the cylinder. The drawing shows a connecting rod of telescopic construction consisting of two parts, one of which is connected to the piston through a gudgeon pin in the usual manner, whilst the other part which telescopes within this is connected to the crankpin bearing; the arrangement being such that the two parts move in relation to each other. The lower end of the rod is increased in diameter to receive a drum on which a cam-face has been machined which engages with a roller. As the crankshaft revolves, motion is transmitted through bevel-gears to the cam-drum which will impart variable motion to the piston ; the lengthening of the stroke occurring on the exhaust-stroke. The next stroke being suction, a larger volume of gas will he drawn into the cylinder.