Word: detector
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Dates: during 1970-1979
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...Dynamite Detector. One result of the crime and violence is that companies supplying guards, watchdogs, alarms, surveillance devices and identification systems can barely keep up with the demand. The U.S. Department of Commerce estimates that the number of detective agencies and protective services has grown by 40% since 1965, to more than 3,000. In the sluggish mid-February stock market, a $15 million issue of stock in Brink's, the armored-car company, sold easily and rose to a 10% premium. Pinkerton's, which has the largest U.S. private detective force, reported that 1969 revenues increased...
...identify "dynamite and other explosive vapors diffusing out of closed baggage." The implication of the notice was plain. Alarmed by the recent rash of bombings, on the ground and in the air, the Government is stepping up its efforts to encourage the design and manufacture of an effective bomb detector...
...prototype "bomb sniffer" that scents incriminating odors with all the dispatch of a highly trained bloodhound. In fact, the system has so impressed the Israelis that they have adapted and improved the design for their own harassed airliners, though they have not officially acknowledged the use of such a detector...
Golden Tube. The target of the chromatographic detective work performed by the bomb sniffer is the vapor from a chemical called ethylene glycol dinitrate (EGDN), one of the principal components of emissions given off by dynamite. With the aid of a small internal fan, the detector samples air in the vicinity of a suspect object and passes the vapors over a modern equivalent of Tsvett's limestone-a rough gold-plated copper surface that has a special affinity for EGDN. As the molecules adhere to it, their concentration increases. The special surface is then heated...