. Popular electricity magazine in plain English. /%. 3 Amp:Fuses Fig. 2. Micrometer Spark Gap inch brass rods about two inches long. Thelength of the gap between the rods should bevery small — about ^ of an inch or less. Thegap should also be protected by three amperefuses connected in series with the line and rods,as otherwise, if an arc is started across the gap,quite a pyrotechnic exhibition will be sure tofollow with disastrous results. A combinationof the condenser method and micrometer gapmay be employed to good advantage. The graphite-rod preventer, as used by theAmerican Marconi Compan
. Popular electricity magazine in plain English. /%. 3 Amp:Fuses Fig. 2. Micrometer Spark Gap inch brass rods about two inches long. Thelength of the gap between the rods should bevery small — about ^ of an inch or less. Thegap should also be protected by three amperefuses connected in series with the line and rods,as otherwise, if an arc is started across the gap,quite a pyrotechnic exhibition will be sure tofollow with disastrous results. A combinationof the condenser method and micrometer gapmay be employed to good advantage. The graphite-rod preventer, as used by theAmerican Marconi Company, is coming moreand more extensively into use on account of itssimplicity and cheapness. It consists of twohigh resistance graphite rods (or one with a con-nection in the middle of its length) connectedin series and shunted across the line with themiddle connection grounded, Fig. 3. The
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1912
