File:Carlisle and Finch 30-inch lamp mechanism.jpg

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English: Fig. 244: Lamp Mechanism. Carlisle and Finch 30-inch search-light.

Fig.244 shows the general appearance of the lamp mechanism. This is mounted in the drum. The entire working part may be moved forward or backward in the containing box by means of a screw spindle operated by an external hand wheel. This permits setting the arc in the focus of the mirror. Carbon electrodes with soft cores are used, the larger being made the positive

because it burns more rapidly. The life of a pair of carbons is about seven hours.
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Naval Electricians' Text Book: Volume II Practical Fourth Edition, 1917 United States Naval Institute Annapolis, Maryland Captain W. H. G. Bullard, U.S.N Revised by Department of Electrical Engineering and Physics, U.S. Naval Academy Page 381

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https://www.google.com/books/edition/Naval_Electricians_Text_Book/t1BGAAAAYAAJ?hl=en&gbpv=0
Author Unknown authorUnknown author

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Carlisle_and_Finch_30-inch_lamp_mechanism.jpg

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current17:24, 12 November 2020Thumbnail for version as of 17:24, 12 November 20201,161 × 1,477 (815 KB)RoySmith (talk | contribs)Uploaded a work by Unknown from Naval Electricians' Text Book: Volume II Practical Fourth Edition, 1917 United States Naval Institute Annapolis, Maryland Captain W. H. G. Bullard, U.S.N Revised by Department of Electrical Engineering and Physics, U.S. Naval Academy Page 381 Via Google Books https://www.google.com/books/edition/Naval_Electricians_Text_Book/t1BGAAAAYAAJ?hl=en&gbpv=0 with UploadWizard

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