Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 440
put it in place.If desired to clean the re- ^ ^^t- flector remove only the top guide by-loosening the thumb nut at the end ofthe upper arm, then remove the guide carbon andcarbon holder. The tension spring in the lamp is for two purposes,it brings together the points of the carbons, so as… … 434 LOCOMOTIVE ENGINEERING because the current will not jump across the separation.Sometimes there will be a deposit of scale on thepoint of the lower copper electrode which preventsthe top carbon touching the copper, and as the currentwill not go through this scale there will be no lightuntil this…
Locomotives
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