. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 388 BELL SYSTEM TECHNICAL JOURNAL In Fig. 5 is shown the result of plotting Brem/BrVs. {L/D)ylHc(T/Toy for the same set of bars. This combination of variables was arrived at purely by a cut and try method, but as shown, a surprisingly good correlation is obtained. It should be mentioned in connection with Fig. 4 that it was found that the data relating to some of the bars did not fit the curve satis- factorily if Brem/Br was plotted against L^HdD, but in each case. 4 5
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 388 BELL SYSTEM TECHNICAL JOURNAL In Fig. 5 is shown the result of plotting Brem/BrVs. {L/D)ylHc(T/Toy for the same set of bars. This combination of variables was arrived at purely by a cut and try method, but as shown, a surprisingly good correlation is obtained. It should be mentioned in connection with Fig. 4 that it was found that the data relating to some of the bars did not fit the curve satis- factorily if Brem/Br was plotted against L^HdD, but in each case. 4 5 6 7 8 LENGTH OF BAR IN INCHES Fig. 4—Curves of remanence vs. length for straight bar magnets of different cross- sections and materials. where this was so the bar had been quenched from above or below the optimum hardening temperature. It was found, however, that the data from these bars could be correlated with those from the properly hardened bars if Brem/Br were plotted against {LID)^Hc{TITqY in which T is the actual, and Tq is the optimum hardening temperature on the absolute scale. The ratio TJTq is, of course, equal to unity for bars properly hardened. The definition of the optimum hardening temperature will be given Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Telephone and Telegraph Company. [Short Hills, N. J. , etc. , American Telephone and Telegraph Co. ]
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
