n could never be regarded as en- embracing a number of small horns communicating at adapted to circuits of a given voltage, is the subject tirely faultless. What is known as the "hairpin" their smaller ends with a transmitter having a mouth. of the patent granted to Mr. Hanks. The adaptability… … requisition. THE IMPROVED FORM OF INCANDESCENT LAMP FILA- A device by which this change is at all times readily MENT COMPARED WITH ONE OF THE "HAIRPIN" accomplished is shown in the accompanying cut. The CHAIN-PULL ELECTRIC LIGHT. TYPE. lamp is provided with about ten feet of flexible cord, vocal or…
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-205-117.webp)
