Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 363
N u nj … 13 the current being fed to the rod by means of a slidino- contact.Fig. 14: shows the arrangement of this type of feed. The rod isshown at R, the sliding contact at B, and the carbon is attached tothe rod at C. These lamps have the advantage that carbons, which do nothave a uniform cross-section or…
Architecture · Building · Carpentry
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