Word: styluses
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Dates: during 1960-1969
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...beat the language barrier between man and machine. Itek has, in effect, hitched the digital computer to the draftsman's stylus. With a photoelectric light pen, the operator of an EDM can formulate engineering problems graphically (instead of reducing them to equations) on a console that looks like a flat, unflickering television screen. The operator's designs pass through the console into an inexpensive computer, which solves the problems and stores the answers in its memory banks in both digitalized form and on microfilm. By simply pressing buttons and sketching with the light pen, the engineer may enter...
...practice, smoothly polished, spherically tipped diamond is the actual groove runner (or, if you have weak floors, groove hopper). It is connected to a control rod, or "stylus arm" which wiggles along with its maneuverings. This stylus arm is in turn either connected to a crystal against which it vibrates, causing voltages to appear across it, or it in some way moves a coil through a magnetic field, cutting lines of force, and again causing voltages to arise...
...first type of cartridge--in which the stylus arm, or shank, presses on a crystal--is called the "ceramic" type. Because they are consistently prone to distortions of the true signal and because they sually entail the necessitty of higher stylus pressures, ceramic cartridges are not popularly used today in custom audio circles, and must of our cartridges employ the electrically less efficient magnetic principle...
Anytime you move a magnet in the close proximity of a coiled wire (or vice versa) you cause a current to flow through the coil. In the stereo cartridge we can either attach a magnet to the stylus arm and hold two coils stationary in the body of the device, or we can wind two coils onto the arm in different directions and mount a stationary magnet in the body. Either way (one is called "moving magnet", the other "moving coil" for obcious reasons), when the needle does its mazurka in the groove the stylus arms follows, and the groove...
...competitive scramble among TV-phonograph makers, any new sales idea is as good as gold. Last week Magnavox Co. announced one that it hopes will win nuggets of customer good will: a ten-year unconditional guarantee on its diamond stylus phonograph needles. The guarantee was possible because of the development of an automatic record changer with a tone arm that rests so lightly on records that the company says both needle and record will last longer...