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Equipment Used Afloat, Ashore A New Type of Balanced Piston Ring—Wire That Does Not Unstrand | —Powerful English Lifeboat—Electric Motor Driven Valve Refacer O ELIMINATE the commonly known defects of the average piston ring in order to make an improved ring, which would give long- er service and require less care and which would work in itself, indepen- dent of additional contrivances, such as springs, John L. Gibson, an engi- neer, has devised a new type of ring and piston, patent for which is now pending. The main feature of this ring is that it does not depend on springs, for its tightness, but it is completely bal- anced and gives the correct pressure against the cylinder walls, by the pressure of whatever element may be introduced into the cylinder, be it steam, water, oil, ammonia or gas. Many rings of special design in two or more parts have been developed and used with different degrees of success. The construction of this ring differs from the rest in so far as it is thoroughly balanced by the pressure of the medium used. The balancing is arrived at in the following manner: A series of ports on the top and bottom sides of piston 1—ENTIRE PISTON ASSEMBLED 2—SECTION SHOWING RINGS’ IN PLACE—PART SECTION SHOWING RINGS REMOVED FOR INSERTION OF TONGUE PIECE FIG. 83—ENLARGED SKETCH OF TONGUE PIECE FIG. FIG. as indicated in Fig. 1 admit the full pressure to their respective rings and to both the back and front grooves of these rings. The center chimes are cut away to receive tongue pieces, which are so constructed as to make up for the removed parts and so make the chimes continuous, whether the rings are in two or more segments as - FIG. 4—PLAN OF PISTON AND RINGS conditions warrant. This will be seen by reference to Figs. 1, 2 and 3. The segmental part of the rings overlap the tongue pieces thus making a seal. The tongue pieces are equipped with a small spring on the back to keep same pressed up against the inner bedded surfaces of the ring. It will be seen that there is no pres- sure admitted to inside top and bot- tom of these rings, pressure only be- ing used between center part of chime and corresponding back of rings. A series of holes through each _ seg- Ee bbbhbeborbbkibiprbeckibietheestettonpeboehidtieetacamem > as ment of ring communicating to an outer groove on said segments of the ring, which, due to the difference of outside and inside areas causes a bal- ancing effect which insures long life and the least amount of friction and wear. In this way the continuous in- convenience of constant watchfulness, removal and changing of rings is eli- minated. Wire Cable Developed-Will Not Unstrand What is stated to be the first basic change in wire rope for marine and shipping use in more than acentury of marine cable history has been brought. out by the American Cable Co. in the manufacture of a new wire rope. The new principle developed in the mak- ing of the rope is the “preforming” of wires and strands to the exact shape they must have to fit correctly in the completed product. . The rope is being made in Lang and regular lays up to one inch in diameter and engineers concerned with its develop- ment for general marine purposes ex- press satisfaction with its perform- ance under exacting and _ strenuous tests. It is now being used extensively with special fittings in the rigging of coast patrol boats built for the United States government. The new rope is not only designed for use on board ship as part of its equipment but is also adaptable as a reliable rope for UPPER—HEXAGON FITTING ADAPTING WIRE ROPE FOR USE IN PLACE OF RODS FOR VARIOUS PURPOSES LOWER—A WIRE FITTING SPLIT OPEN TO SHOW HOW METAL GRIPS STRANDS AND HELPS TO EQUALIZE LOAD 230 Oe ea sii eat "ee Ae