Patents Completed.
Page 28
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Mushroom Valve Adjustment. Assisting the Water Circulation.
J. TAN BOOT DONK, No. 27,099, dated 25th November, 1912. —The stem of a mushroom valve is made adjustable by forming it in two parts. The upper part which bears the mushloom head is screwed at its lower end, and the lower portion of the spindle, which is the adjusting piece, is bored centrally and screwed internally to fit the upper part of the spindle. The adjusting piece is partially split so that it can be bored
somewhat small and when fitted will lock itself in position. The upper part is tapered and a sleeve is fitted over, this sleeve providing a face for the valve-spring seat. In assembling the valve, the head and its spindle are first placed in position, the spring is then threaded on to it and the tapered sleeve held up against the spring. The sleeve is lifted so as to compress the spring, and the adjusting piece is screwed on to the upper part of the spindle until it is set at the required length. The sleeve is then released and it seats itself on the tapered portion of the adjusting piece.
THE BRISTOL CARRIAGE AND WAGON WORKS CO, LTD., and W. A. B. COPSEY, No. 25,374, dated 5th November, 1911 —This invention relates to wipe-contacts for magnetos. The accompanying drawing shows the particular method adopted. Fitted to the camshaft is an eccentric and sheave, which can be mounted on ball-bearings. The sheave is provided with two arms, one of which is pivoted to a lever which in turn is pivoted to a lug on the crankcase, thus anchoring the sheave. The other lever is so shaped that, when travelling in the path of the extension from the bell-crank lever on the make-and-break mechanism of the magneto, it will impart a trip motion which gives the desired interruption of current. Owing to the sheave being anchored by the lever in the manner described, the trip lever will travel in an elliptical path. and if the other sheave-extension be provided with an eccentric boss a variation of the timing could be obtained.
H. JOYCE, No. 20,898, dated 13th September, 1912.—Acccrding to this invention the water circulation in a thermosyphon system is assisted by a small propeller pump mounted in the conduit connecting the radiator with the cylinder jackets, NO special chamber is provided for this propeller. It may be mounted directly on the rear end of the fan. spindle, which passes through a suitable stuffing box, or it may be belt-driven from that spindle. In the latter case a joc6y pulley would be provided to enable the belt to be slackened so that the pump can be thrown out of action if desired. Any form of propeller may be used, and the original specification illustrates ordinary propeller blades in one case and helical blades in another.
J. D. Ewen, No. 20,305, dated 6th September, 1911—This invention is to minimize noise and vibration set up in internalcombustion engines due to the action of poppet valves, and consists in providing a resilient valve seating. The valve seating is provided on the top of a cylindrical member capable of sliding, beneath which is a spring, the necessary strength of which can be found by experiment. A slot is provided in the wall of the valve-seating member which engages with the end of a set screw, and limits the travel of the valve seat. The valve stem is made in one continuous piece, and the valve is worked in the usual way by a cam from the half-time shaft. It will be seen that owing to the coil-spring being situated beneath the valve seat, the latter will travel with the valve until the edge of the slot comes in contact with the set screw, and then the valve itself will open. Similarly, when the valve is closing it will come in contact with the sliding valve-seating, and will press this down gradually, preventing any sudden jar, directly on to a rigid seating.