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Expired
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Frederick John Tregoning
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Individual
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Individual
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Publication of GB190228140ApublicationCriticalpatent/GB190228140A/en
28,140. Tregoning, F. J. Dec. 20. Laying dust in mines; rock drills.-Dust, made in rock-drilling, is arrested at the mouth of the hole by a wet sponge held by a metal skeleton inside a perforated casing a, which surrounds the drill f. The casing is fixed over the hole by means of the rod g and bracket h on the drill cradle, with adjusting-screws at m, p.
GB190228140D1902-12-201902-12-20An Improved Means for the Prevention of Dust in Connection with Rock-drill Operations
ExpiredGB190228140A
(en)
An improvement in and relating to the means of safeguarding those workmen engaged inthe operation of machine-boring into rock, coal or the like solid matter from the dangers of dust