International Library of Technology · Scranton, International Textbook Co. · leaf 370
n called, and the cop-per or platinum for the lower electrode. This arrange-ment has been used in a few isolated cases. For example,an upper positive carbon and lower copper electrode havebeen used in one form of locomotive headlight. It is im-portant when this arrangement is used to see that… … 3. After the carbons have been separated for a timethey take on the appearance shown in Fig. 2. This repre-sents an open arc, or an arc formed in the open air, asdistinguished from one that is formed in a confined space § is ELECTRIC LIGHTING. where very little oxygen is present. The term arc came…
Electrical engineering
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