| 31. | In an era before the invention of the safety lamp, the only practical source of light was a candle.
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| 32. | Combined with new battery technologies, such as the lithium battery, it gives much better performance in safety lamp applications.
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| 33. | These required Mine Deputies to undertake statutory examinations and to carry flame safety lamps and gas detectors during inspections.
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| 34. | After the widespread introduction of the safety lamp, explosions continued because the early Davy lamps were fragile and easily damaged.
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| 35. | As a new light source, LED has many advantages for safety lamps, including longer illumination times and reduced energy requirements.
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| 36. | By 1886 a lamp with better light output than a flame safety lamp was in production by the Edison-Swan Company.
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| 37. | A safety lamp has to ensure that the triangle of fire is maintained inside the lamp, but cannot pass to the outside.
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| 38. | Elliot was keen to try new mining technologies and was an advocate of improved safety lamps, shaft detaching hooks, and coal-cutting machinery.
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| 39. | Stephenson designed a safety lamp, known as the Geordie lamp, with air fed through narrow tubes, down which a flame could not move.
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| 40. | It also led Sir Humphry Davy to devise another safety lamp, the Davy lamp, in which the flame was surrounded by iron gauze.
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