Novel Piston-ring Design.
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Although considerable study has been devoted to the perfection of the method of producing the conventional cast-iron piston ring, with which the users of internal-combustion engines are familiar, very little advance has been made in respect of the actual design of this component. Manufacturers have been very conservative in their adherence to the eccentricturned cast-iron cylindrical ring, although alteration has been frequently made in the disposition and grouping of the sets
We have had our attention drawn recently to a new form of construction which, on the face of it, will yield distinct advantages... Principally a great saving of weight is effected by this method, and there should be an ending to _the almost inevitable and frequent fracture to which the more ordinary type of rin_g is subject. Owing to the fact that the patents are not fully secured in certain foreign countries, we are not at liberty, at the time of writing, to describe or to illustrate this interesting departure, which is the result of experiment by a' distinguished Belgian engineer of great experience, who has 'had under particular consideration the problem of securing effective gas-tight piston jointson high-speed" rotary aviation engines. So soon as we are at liberty to describe this interesting and withal simple departure, we shall do so in our columns. In the meantime, we shall be happy to put any manufacturer or other definitely-interested party into communication with the inventor himself.