Word: cords
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Dates: during 1960-1969
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Their concern is understandable. For even in childhood, mumps may occasionally cause complications leading to permanent deafness, impairment of vision, or inflammation of the brain and spinal cord. Such difficulties are more common and are likely to be more severe among adults. Grown men face the added risk that inflammation of the testicles may affect fertility...
Prodded by the press, by state governments and by Congress, which is holding hearings on a tire-safety bill, the rubber companies are rolling out a whole batch of new tires that have some of the most important changes since the introduction of rayon cord (1938), nylon cord (1947) and tubeless tires (1947). Compared with existing tires, they wear longer, are less likely to blow out, grip the road more strongly, and keep their shape better...
Warning Signs. Led by Goodrich and Goodyear, tiremakers this fall will introduce "the wear bar," a device adapted from aircraft tires, which have a red cord imbedded in the rubber to show when the tread is becoming worn. In auto tires, small portions of the tread will be cut one-sixteenth of an inch less deep than the rest of the grooves, and will show up as bald spots when the tire needs replacing...
This week in Kansas City, Goodyear also will begin test marketing "radial-ply" tires, which have been popular in Europe for years, but are new to the U.S. Normally the layers of cord in a tire are set at 30° angles to one another, forming a diamond pattern around the wheel, but in a radial tire the cords are at 90° angles, forming a pattern of crosses. With this structure, the faster a car goes, the more tread is slapped onto the ground. The result is better road grip and up to 100% longer tread life-but also...
Trouble Spot. The greatest changes are in the cord fibers used to make the carcass of a tire. Nylon is a particularly admirable cord, but automakers are not fond of it. Only 6% of the nation's new cars carry nylon tires as original equipment, though 80% of the tires sold in the replacement market are nylon. Detroit's resistance derives largely from the fact that nylon tires tend to make a thumping noise for the first few blocks or miles of a ride-and auto dealers can have a difficult time convincing customers that the thump comes...