NEW " FLOATING-BOSS" PISTON
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SEVERAL important claims are made for a design of piston recently introduced by Welhvorthy, Ltd., Lyming-ton, Hants. Described as the Floatingboss piston, it has, as its name implies, gudgeon-pin bosses whichare separate from the skirt, a trepanning operation, in the machining of the die casting, removing all the metal joining the outer extremities of the bosses with the skirt.
Merging at their lower ends with the base of the skirt and at their tops with the piston crown, two robust struts carry the bosses. These transmit the power thrust directly from the crown, which, bythem, is reinforced,
to the centres of the bosses, and any compression or extension of the struts that may take place through explosion, compression or inertia forces, is not imparted to the piston walls.
Furthermore, the struts act as supplementary heat conductors, whilst oil-cooling is promoted by the space provided between them and the. body at the piston.
We understand that these pistons have proved notably successful in oil engines, and their maker's name is sufficient guarantee of the quality of the alloy of which they are composed and of the precision of their manufacture.