Determination of current and candle power curves of the alternating current arc under impressed voltage of various wave forms . ndardized. This necessitates the balancing of a yellowlight against that of the arc which varies in color froma yellowish V7hite through a white to a bluish white. Toaccomplish this comparison and also obtain instantaneousvalues, if possible, of the light emitted by the arc asthe current passes through a complete cycle, a form offlicker photometer is used in this work. The flicker photometer as here used is shown com-plete in Print 2. The steel frame, d, rests upon th
Determination of current and candle power curves of the alternating current arc under impressed voltage of various wave forms . ndardized. This necessitates the balancing of a yellowlight against that of the arc which varies in color froma yellowish V7hite through a white to a bluish white. Toaccomplish this comparison and also obtain instantaneousvalues, if possible, of the light emitted by the arc asthe current passes through a complete cycle, a form offlicker photometer is used in this work. The flicker photometer as here used is shown com-plete in Print 2. The steel frame, d, rests upon the table,c. This fra,me serves as a runway for the two carriages, eand i, the former carrying a Lummer-Brodhun screen, f, andthe latter carrying the standard lamp, b. The arc lightis placed at the opposite end of the bench, at a. This isthe machine as described above. The discs, g and h, aresecured to the shaft, 1, which runs in the bearings, m, nand 0. These discs are better shov/n by Print 4. Theyare made of aluminum, and are 20 inches in diameter by 3/52of an inch thick. Two of these discs are mounted on the eo3lb 38 15. PRIHT 2 _.*^^-- 15a
Size: 1352px × 1848px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookiddeterminatio, bookyear1905
