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Expired
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Henry Bell
John Bell
Robert Airth
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Individual
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Individual
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Publication of GB190809064ApublicationCriticalpatent/GB190809064A/en
9064. Bell, H., Bell, J., and Airth, R. April 25. Fly-wheels.-In a rock drill to which the principle of the ordinary steam engine is adapted, an eccentric 47 is formed on one of the fly-wheels 27 to operate the slide-valve 39. The shafts 26 of the fly-wheels 27 are carried in recesses in bosses 24 on the casing 3. A square hole 28 is formed in one shaft, and a handle is provided to rotate the flywheels past dead-centres.
GB190809064D1908-04-251908-04-25Improvements in Rock-drilling Machines.
ExpiredGB190809064A
(en)
A new and improved means of converting rotary into reciprocating motion, the said means being especially applicable to percussion rock drills or the like