The investigations of the sub-committee on electrical measurements

✍ Scribed by Edwin J. Houston; Elihu Thomson

• Book ID: 103086233
• Publisher: Elsevier Science
• Year: 1878
• Tongue: English
• Weight: 853 KB
• Volume: 105
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(78)90377-0

✦ Synopsis

Now that the conversion of motive power into electricity, and the use of the latter for lighting, the deposition of metals, etc., are rapidly gaining in importance, it has become desirable that reliable data be obtained as to the efficiency of the va~'ious types of machines designed for producing electrical current from motive power.

In entering this comparatively new field of research, we have been met by peculiar difficulties, owing to conditions, that do not exist in the various forms of batteries used as sources of electrical power.

In many battery circuits a high external resistance may be employed, and the electromotive force remain comparatively constant, while in dynamo-electric machines, in which the reaction principle is employed, the introduction of a very high external resistance into the circuit must be necessarily attended by decided variations in the