Word: electromagnetic
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...gives little idea of the machine's talents. Its strong point is its "inner memory." This "memory" consists of nine big aluminum cylinders revolving up to 7,200 r.p.m. Their surfaces are coated with black magnetic material. Huddled around them are staggered rows of little brass blocks enclosing electromagnets. When a brief electric impulse flashes through an electromagnet, it prints a dot of magnetism on the spinning cylinder's surface. The dot stands for part of a coded number for the machine to store in its memory...
...player; accumulating free games was a matter of luck. But the new machines incorporate a pair of mechanical devices which have taken pinball out of the shoot-and-pray classification and given the player a show for his money. One of these is the "live" bumper, essentially an electromagnet surrounding a spring; when touched by a ball it promptly squats down and sends the ball hurtling around the board. The other is the flipper, a little plastic arm controlled by buttons on the flanks of the machine, with which the player can achieve considerable control of the ball...
...Although many scientists would consider it too optimistic, Minister Howe thought the practical everyday application of atomic energy was only about five years off. "The science is in about the same position today as electricity occupied when Faraday discovered the electromagnet about 100 years ago . . . but practical application of this energy will probably move faster than in Faraday's time...
...betatron, a close relative of the ordinary transformer which raises or lowers the voltage of an alternating current, is an electron accelerator. A whopping electromagnet (130 tons) is energized by a heavy current flowing through two coils made of one-inch copper rods...
Processes & Places. There were many possible ways of separating U-235 from natural uranium. Two processes at least were found to work well. In the first (mass spectrograph), uranium particles were electrically charged, fired through a huge electromagnet, sent into a curving course. The lighter U-235 swung more widely on the curve. Traps were set at the end of the turn, and U-235 was caught there, while U-238 was discarded...