. The Bell System technical journal . 4 - ENVELOPE OF VARYING 60 CYCLE WAVEFILM SPEED 20 INCHES PER MINUTE 5 - ENVELOPE OF WAVE . FILM SPEED 1-1/2 INCHES PER MINUTE. AAA/WMAAA 6-RECORD SHOWING OPERATION OF SAMPLING DEVICE. A A A A A A (aa^A AWtfOf^^^(^A^-f # 7-RECORD MADE WITH TWO VIBRATOR ELEMENTS. ■ •■■■•■••■1 ■ ■ ■ ■ ■ 1 ■■■: -- ~>/\-X/X^-\/Xy-^^-^ .,^N^V- ■ \. y V /> ^ I • • ■ ■ 1 e-WAVE. OF 60CYCLE AND 25 CYCLE COMPONENTS SUPERPOSED, Fig. 19—Samples of continuous oscillograms. 388 BELL SYSTEM TECHNICAL JOURNAL rotating mirror, and if the film speed is doubled, one wave in every 6
. The Bell System technical journal . 4 - ENVELOPE OF VARYING 60 CYCLE WAVEFILM SPEED 20 INCHES PER MINUTE 5 - ENVELOPE OF WAVE . FILM SPEED 1-1/2 INCHES PER MINUTE. AAA/WMAAA 6-RECORD SHOWING OPERATION OF SAMPLING DEVICE. A A A A A A (aa^A AWtfOf^^^(^A^-f # 7-RECORD MADE WITH TWO VIBRATOR ELEMENTS. ■ •■■■•■••■1 ■ ■ ■ ■ ■ 1 ■■■: -- ~>/\-X/X^-\/Xy-^^-^ .,^N^V- ■ \. y V /> ^ I • • ■ ■ 1 e-WAVE. OF 60CYCLE AND 25 CYCLE COMPONENTS SUPERPOSED, Fig. 19—Samples of continuous oscillograms. 388 BELL SYSTEM TECHNICAL JOURNAL rotating mirror, and if the film speed is doubled, one wave in every 60will be recorded. Individual facets on the revolving mirror may be inclined to theaxis of rotation in order that successive exposures may be made fromdifferent vibrator elements. For example, three facets suitablymounted could be employed to show in succession sample waves of.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
