| 单词 |
Pointolite |
| 释义 |
Pointolite|ˈpɔɪntəlaɪt|
Also pointolite.
A proprietary name for a type of lamp containing a small but bright source of light, produced by the incandescence of a small knob of tungsten heated by an arc struck between it and a cathode.
1916Illuminating Engineer IX. 32/1 A very interesting new form of lamp for projection purposes..has just been brought out by the Edison and Swan United Electric Light Co., Ltd. The ‘Pointolite’ lamp is in reality an arc within a sealed bulb. 1923Trade Marks Jrnl. 25 July 1558 Pointolite... Electric lamps... The Edison Swan Electric Company, Limited,..London..; manufacturers. 1926W. E. Woodward Metallogr. Steel & Cast Iron i. 42 For taking photomicrographs a 500 c.p. ‘pointolite’ gives excellent results. 1949A. Pereira Man. Sub-Standard Cinematogr. vi. 234 A form of arc light which has found wide application for comparatively low power projection is the enclosed tungsten arc known as Pointolite. 1964M. Hynes Med. Bacteriol. (ed. 8) v. 57 A good illumination of sufficient intensity is essential. This is given by an arc-light or a ‘pointolite’ lamp. |
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