Word: coiling
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Dates: during 1960-1969
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Guarding against such an accident is easy. In the Annals of Surgery, Dr. C. Paul Boyan of Manhattan's Memorial Sloan-Kettering Cancer Center describes a plastic coil immersed in a bath of water kept at blood heat. The blood, passing through the coil on its way from the transfusion bottle to the patient's arm, reaches his heart at just the right temperature. Heart stoppage used to occur in about 50% of patients who got six pints or more of chilled blood; it occurs in only 7% now that they get coil-warmed blood...
Meanwhile, a nurse from the Brigham has put sterile coils in the tank's bath of dialysate (filtering solution) and added chemicals. She uses about l½ pints of the lawyer's blood, stored from the last treatment, to prime the coil. Then she connects a thin hose from the artificial kidney to the artery tube in his arm. He bleeds a little to finish the priming and the nurse hooks another hose to his vein tube. That completes the liquid circuit, and she switches on the machine. When all is going well, the doctor leaves...
After his return to the U.S., Parker read about a new, inexpensive contraceptive device consisting of a pliable, doubleS plastic coil (TIME, July 31). "When I learned it worked on women," says Parker, "I thought: why won't it work on cows?" It does. After elaborate experiments at the Beltsville, Md., agricultural research center, India's Food and Agricultural Ministry enthusiastically launched a pilot project in the northern province of Uttar Pradesh. Of the country's 200 million cattle, some 75% are used as beasts of burden or as milk producers. The remaining 50 million are mostly...
...taught Columbus engineer, the "Sentronic" book detector works on the ancient principle of magnetism. A sliver of magnetized metal is hidden somewhere in a book's spine or binding, and the librarian who checks the book out simply demagnetizes the metal insert by passing the book through a coil carrying an electric current. If a thief bolts for the exit instead of the check-out desk, the magnetized metal inside his book is detected by an instrument that trips a solenoid hidden at the door; the turnstile is automatically locked and the librarian alerted. A sign over the door...
...high-power pulses of electrical energy throbbing through intricate circuitry are the heartbeats of modern radar. But they are the bane of many an electronics engineer. Sometimes the high-frequency currents that are crammed into a pulse swirl through a simple resistance as if it were also a small coil (inductance); sometimes the pulses treat the resistance as if it were a capacitor. Either way, coil or capacitor, those unwanted effects introduce annoying problems...