International Library of Technology · Scranton, International Textbook Co. · leaf 209
the brass ring t[. This basehas the advantage that the outer shell, if one is used, is inno way connected to the circuit, and there is, therefore, lessdanger of receiving a shock by touching the lamp; it hasbeen, and still is, used to a considerable extent, though it isgradually going out of use,… … Pig. 8. n ELECTRIC LIGHTING. 16 screws on a projecting stud, thus making one connec-tion; the other connection is made by the ring f com-ing into contact with a corresponding ring or terminalin the socket. The later types of T. H. base are madeof porcelain with a brass center piece and outside…
Electrical engineering
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