[Bubier], Edward Trevert, 1858- [from old catalog] · Lynn, Mass., Bubier pub. co. · leaf 222
220 ELECTRICITY AND ITS the bearings which hold the cutter bar, the bar hasto withstand not only the strain due to the resist-ance of the coal being cut, but also that which thechain itself has to overcome. In the Edison Machine a counter shaft is placedbehind the cutter bar to which the power is… … THOMSON-VAN DEPOELE MINING LOCOMOTIVE. chains. The power is then transmitted to the barby means of gears, so protected as to prevent thecoal dust from settling between them. The ma-chine is especially adapted to withstand the roughuses to which it is subjected in mines, and it enjoysthe advantage…
Electricity
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