Word: magnetizers
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...record both intensity and duration of the flash. Electric-eye cameras reveal the number of separate pulses within a single stroke. Another device (the fulchronograph) clocks the quickest stroke and measures the amount of current. Its heart is an ever-turning aluminum wheel, with hundreds of small strips of magnet steel projecting from its rim. Lightning, when it strikes, creates an electrical field in coils which magnetize the strips. When the fins are removed in the laboratory their magnetism is measured, gives the strength of the stroke charted...
...like it, they push the left button. Each button is electrically connected with a pen which draws a continuous line on a moving paper tape pulled under it at a constant speed of approximately one inch every five seconds. When a button is pressed, an electric magnet jogs the pen a quarter of an inch, keeps it off the apathy line until the button is released. Working from a timed script, researchers interview the subjects after the program, ask the cause for their likes & dislikes...
...stepping up an ordinary 110-volt current to perhaps 1,000,000 volts in a transformer, then jumping it through a straight vacuum tube at a target from which X-rays are emitted. Now, in effect, the betatron combines transformer and vacuum tube. Instead of circling round & round a magnet in a coil of wire, as in a transformer, the electrons whirl through the empty space inside the doughnut-shaped vacuum while their voltage increases...
...Arthur H. du Grenier Co. of Haverhill, Mass, (vending machines for candy, gum, cigarets) has had to cut production 30-50%, employment one-third, not only because of the die-casting shortage but for lack of steel and of cobalt nickel for the magnet that rejects phony coins. Du Grenier has no defense business. Says Treasurer Bouchard: "We are very much worried about the future...
...19th-Century science pushed the emigrants, for progress in medicine, sanitation and transportation helped increase the European population in 100 years from 187 million to 400 million. One attraction of the New World magnet was its boundless forests. Wars factories and railroads had made free firewood scarce in 19th-Century Europe...