Electrical news and engineering . of the tube unless the deposit be isively thick, in which case the bulb will overheat ami mayhave a short life. The life of a bulb varies from six hundred to three thous-and hours. Some bulbs, however, have been known toover eighteen months of nearly continuous service. The failure always aecurs in the filaments, and in order to givethe bulb a long life the filament is made particularly , there are several designs for different current,capacities as follows: 1. The 2-ampere unit, which when operating on 115 (single phase) will charg
Electrical news and engineering . of the tube unless the deposit be isively thick, in which case the bulb will overheat ami mayhave a short life. The life of a bulb varies from six hundred to three thous-and hours. Some bulbs, however, have been known toover eighteen months of nearly continuous service. The failure always aecurs in the filaments, and in order to givethe bulb a long life the filament is made particularly , there are several designs for different current,capacities as follows: 1. The 2-ampere unit, which when operating on 115 (single phase) will charge three cells at 2 amperes, sixcells at about 1 ampere, and eight cells at about ampere. 2. The 6-ampere, volt unit is for charging eitherthree or six cells of lead battery at 6 amperes when operatedon 115 volts (single phase). 3. The 6-ampere, volt unit is for charging fromthree to thirty cells of lead plate battery at from one to sixamperes. As it is evident that No. 2 size of rectifier will be the size. Fig. (above)—T8 (Below)- of most interest to automobile owners and. in fact, to themajority of people using storage batteries where they desireto charge the cells themselves, we will hereinafter confineour statements to this size, as designed for 115 volts, 25cycle, realizing at the same time that what is said regardinga ; cycle rectifier applies equally well to a 60 cycle rectifiersince frequency does not in any way influence the characteris-tic iif he r-eetifiying bulbs themselves and need only be tak-en into account in the auto-transformers supplied as part ofthe rectifier. Fig. 7 shows the rectifier (No. 2 size, 25 cycle) as sup-plied by the General Electric Co. Fig. 8 shows the disassem-bled parts of the same rectifier, giving their relative 9 is the small auto-transformer alone, while Fig. 10shows two bulbs of the same size. The dark discolorationalready referred to may be observed in the dark bulbs inthis photograph. Form Factor
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen28donm
