...A lamp used for lighting inside coal mines, with a structure that is safe against methane gas explosions. In the past, Wulf safety lamps that used volatile oil as fuel were used, but now electric safety lamps are widely used, and in Japan, cap lamps are widely used because they are lightweight, have a strong light, and always illuminate the direction you are facing, making them convenient for work. The Wulf safety lamp was invented in 1883 by Wulf C. Wulf of Germany, and is designed so that the heat generated by combustion inside the lamp is removed as it passes through a wire mesh installed around it, so that it is below the ignition temperature of the outside air flow. ... *Some of the terminology that refers to "Wolf Safety Lights" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…炭鉱の坑内で照明に用いられる灯で,メタンガス爆発に対して安全な構造になっているもの。以前は揮発油を燃料とするウルフ安全灯を用いていたが,現在では電気安全灯が広く用いられ,日本では,軽便で光力が強く,つねに顔の向く方向が照らされるので作業上便利なキャップランプcap lamp(帽上電灯)が広く普及している。ウルフ安全灯は,ドイツのウルフC.Wulfによって1883年に考案されたもので,灯内部での燃焼によって発生した熱が,周囲に設けられた金網を通る際に奪われて,外気流の着火温度以下になるように設計されている。… ※「ウルフ安全灯」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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