Word: nut
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Dates: during 1930-1939
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...McCann had been with Standard Oil, and the Standard Oil Companies of New Jersey, Ohio, California, Indiana, Nebraska and Pennsylvania, together with Stance, Inc. are still among his biggest clients, along with California Packing Corp., Devoe & Raynolds (in part), Canadian National Railways, Zonite, Borden (in part), Beech-Nut, Encyclopedia Britannica and many another...
Round nails supplanted square nails; welding is taking the place of rivets. Yet brash would seem the man who would change the other vital method of joining parts to parts, the nut & bolt. As old as the Christian era is the principle of the screwthread, discovered by Archimedes, elaborated by Hero of Alexandria. But bolting is far from perfect. Vibration shakes loose the tightest of nuts, and just as for want of a nail the battle was lost, many a time for want of a bolt the airplane has crashed, the train has been wrecked, the powerplant shut down...
...wrecks motivated him, but the fact that many shells became loose in their whirling trip through the air, became duds instead of explosive missiles. No mechanic, never having touched a monkey-wrench, he set about the problem in a purely theoretical way, writing upon a piece of paper "bolt, nut, parts joined...
...principle of the Dardelet Threadlock is that a nut remains fixed when its friction on a bolt is greater than its friction against the face of the part that is being clamped. By mathematically designed taperings on the thread, the Dardelet nut and bolt become wedged into one mass, cannot possibly shake loose, yet are uninjured when separated. Separation is accomplished easily with a wrench...
Flexibility. Jealous of the President's power to flex tariff rates 50%, the Senate amended the bill to nut flexibility entirely in the hands of Congress. Aware of President Hoover's liking for this flexing power Chairman Hawley rounded up a substantial House majority to exclude the Senate provision from the bill...