. The design and test of a new type of telephone repeating coil . 0F LUftOlS <7. Stromberg-CarlBon iPhe plus sign indicates that the coils are in the same directionAnd the minus si£n indicates that they are opposed. The valueof M is found as follows: let Li and L- be the inductance ofthe two coils, M the mutual inductance, L* aid LM the inductancesof the two coils in series when the; are aiding -•.nd in oppositionreflectively, then lf = Li + L2 + 2 M B • li 4 Ifi - UK M = (L - 1) / 4As an example take the Last pair of readings. = ( - .418) / 4 = .67 = I-TlJlT iin. 1 Coil. Section Coi
. The design and test of a new type of telephone repeating coil . 0F LUftOlS <7. Stromberg-CarlBon iPhe plus sign indicates that the coils are in the same directionAnd the minus si£n indicates that they are opposed. The valueof M is found as follows: let Li and L- be the inductance ofthe two coils, M the mutual inductance, L* aid LM the inductancesof the two coils in series when the; are aiding -•.nd in oppositionreflectively, then lf = Li + L2 + 2 M B • li 4 Ifi - UK M = (L - 1) / 4As an example take the Last pair of readings. = ( - .418) / 4 = .67 = I-TlJlT iin. 1 Coil. Section Coil He s • r I °mf L 1 1470 110 11 1000 1 .189 2 £6,4 1570 110 11 1000 » 1 .177 3 2660 110 11 1000 1 ^£333 4 2820 110 11 1000 1 | & & * 4120 160 16 1000 1 .741 1 £ 2 - C 160 16 1000 .5 .008 3 & 4 * 7420 160 16 1000 1 3 & 4 C 160 16 1000 .5 .008 1 & 3 4620 160 16 1000 1 . 828 I & 4 4620 160 16 1000 1 .828 (1,3) & (2,4) + 12450 240 24 1000 1 (1,5) & (2,4) - 0 240 1000 .5 .012 £ T xnu 3? 1/ ie {1,3 ) and tJ ie se c c
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelephone, bookyear19
