International Library of Technology · Scranton, International Textbook Co. · leaf 435
18 ELECTRIC LIGHTING. G7 76. Direct-Current Constant-Potential Enclosed-Arc Lamps.—Fig. 38 shows a lamp that is similar in manyrespects to the constant-current lamp previously described.The general features, such as the framework, clutch, methodof carrying current into the upper carbon, etc., are… … fig. 39. so as to pull up the plunger p. This plunger operates theclutch rod and its movements are dampened by means ofthe dashpot d. R is the resistance wound on an insulatingcylinder and connected in series to take up the excessvoltage and steady the action of the lamp. Fig. 39 showsthe general…
Electrical engineering
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