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Show ring hr their perfect conformation. Being Be-ing practically one solid unit they possess pos-sess maximum strength. . "Also in air compressors this ring has proved of exceptional value. A test carried out recently by a manufacturer manu-facturer of air compressors proved that Leak-proof packing rings produced ninety pounds pressure from zero in two-thirds of the time required by the segment type of packing ring and, with cb3ck valve removed, held the pressure one-third longer. These rings, on street cars, eliminate the danger of air-brake failure and its attendant liability to accident ac-cident and, damage." tflUF IS JIM FAVOR tal Electric Company's S Ian. Praises Popular Piston Rings. no, inconsiderable amount of 1 ,j trouble is due to leaky compres-, compres-, the belief of H. K. Scheiber, pur-t pur-t agent, for the Capital' Electric ly, who received word yesterday eroMe McQuay-Norris Manufacturing ly that Leak-proof piston rings n made in 1000 different sizes: Leak-proof piston ring won ercBj'avor during the war," declared heiber. "About 90 per cent of Ion rings in use bore this well-trade well-trade mark. They performed 'ork efficiently, releasing more "''and cutting down materially oil loline consumption. ! uso of the Leak-proof piston not confined to the automobile Wherever compression is re-or re-or the conservation of power im-ujht im-ujht for that is, wherever a head packing is used the Leak-i.jiK Leak-i.jiK will be found perfectly 3lc and permanently efficient. yi n all makes of steam engines it )ve greatly superior to any othor Piston head packing in' checker check-er waste. The segmental type ! in eencral use, in which elas-,eisn elas-,eisn secured by setting out springs the segment ends is only ef-r ef-r a short time. The springs Zt, maintain equal strength, and as weakness develops the ring must Perfect roundness. Gaps occur ircumforence and power escapes, commence scoring the cylinder lj it out of ground. Proof rings cannot lose their J because the spring is in tlo |