Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 334
ed by this lamp is white, and more powerfulthan the incandescent. Some improvements have lately beeneffected in this lamp, which was patented in 1878. Figures 167and 16S will illustrate the principle and form of the originallamp, which may be briefly described as follows: If a smallcarbon pencil is… … g^m Fig, 168. will become incandescent in that part, and will burn and growthinner towards the end. The objections to these lamps are:the contacts make too much shadow, derive a certain degree ofheat by conductibility, and the action of the lateral contact isvery delicate. The elevation of the…
Electrical engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-125-104.webp)
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-237-103.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-401-266.webp)
