Word: vacuums
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Dates: during 1940-1949
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...Transportation Coordinator Joe Eastman said there would be no truck production for civilian use after March 1. > Vending-machine makers next month will get 50% less iron and steel than last year, 75% less zinc. > Vacuum-cleaner production for the first quarter will be cut 25-40%. > Electric-light-bulb output will be cut to 1940 volume, about 20% under 1941. Purpose : to save brass and tungsten. > OPM, in a precedent-setting move, ordered all sulphite pulp producers to set aside a monthly pool for allocation to 120 customers of three competing manufacturers (Rayonier, Eastern Corp., Brown...
...aircraft and warships, for the control of planes and ships, and for communications. Men are needed for the operation, repair, and development of these instruments in numbers far greater than the colleges can possibly supply. This means, first of all, men with fairly advanced training in the field of vacuum tube physics and vacuum tube engineering popularly known as 'electronics.' The estimate of 10,000 men who know their way around in this field for the needs of aircraft warning services alone during the coming year is considered conservative. The Department of Physics is besieged with requests...
...heart of the betatron," explains Inventor Kerst, "is a doughnut-shaped glass vacuum tube between the poles of a large electromagnet" (see cut). Inside the tube, a hot filament gives off electrons. Magnetically guided, each electron circles about the tube 400,000 times, accelerated at each rotation by small 70-volt kicks whose cumulative push gives the particle an energy of 20,000,000 volts within a fraction of a second. These fiercely energized electrons are then either: 1) Released continuously from the tube as a beam of beta rays-whence the betatron's name-which...
Hitherto X-rays have been produced by 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...
...isolating them from the rear; then split and hurried along the coast, isolating coastal strongholds like Bardia and Gambut. In that operation the Fleet assisted. With control of land highways, with control of the sea, with initial control of the air, the British had the Axis forces in a vacuum...