Word: disks
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Dates: during 1930-1939
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...touch code may read any book he chooses. After it is adjusted for proper spacing, a scanner supported on tiny rollers moves back & forth across the printed page examining one letter after another in rapid succession. The light passes through a lens, thence to a slotted, motor-driven disk which analyzes the shape of the letter. Then a photo-electric cell converts the light into electric current. The reader places his hand on a wooden box so that it rests against a row of nine small glass beads. The electric current causes tiny rods to push up momentarily through holes...
...material to be centrifuged is placed in a tiny windowed cell in the rim of the disk. What goes on in the cell while the machine is spinning can be seen by stroboscopic light-extremely rapid, brief flashes from a mercury vapor arc. The flashes are timed to illuminate the cell at precisely the same point of every revolution and thus the cell appears motionless. A Zeiss camera nine feet long is trained on it to take pictures...
Festooned with a maze of cables, wires, tanks, cylinders, hand-wheels, steel support frames bolted to the ceiling, a control board studded with dials, the underground laboratory looked something like the inside of a submarine. The Svedberg centrifuge's 7-in. disk rotates at 60,000 r.p.m., has a peripheral speed of about 24 miles a minute, one-third greater than that of Earth at the Equator. Particles whirled at that rate are subjected to a force 250,000 times that of gravity. In short spurts the centrifuge can rotate up to 160,000 r.p.m., exaggerating gravity...
...Filatov cuts two short slots in the opaque cornea, one on each side of the hidden pupil. Through those slots he slides a thin blade of ivory. This protects the patient's crystalline lens and prevents aqueous humor from escaping when Dr. Filatov cuts out a small disk from the cornea directly over the pupil...
Last week Mr. Ketcham announced and demonstrated "Colorcable," his patented method of transmitting color from any where to anywhere in a matter of minutes. Confronted with a color sample at the transmitting end, the operator takes a number of variously colored disks, inserts them in a calibrated, electrically driven wheel. Whirling the wheel resolves the disks into one tone. Disks are added or subtracted until the color appearing on the wheel matches that of the sample. Then the number and color-designations of the disks are wired to the receiver, who has a disk-&-wheel...