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Expired
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George Robert Rich
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Individual
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Individual
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Publication of GB190412542ApublicationCriticalpatent/GB190412542A/en
12,542. Rich, G. R. June 2. Chucks.-The body A of a chuck for holding drills has a tapered shank and a flat upper end, and is provided with a conical socket terminating in a flat, transversely-extending slot. The lower end is externally screw-threaded to receive a conical nut D, and has a conical end a<3> having a groove a<4>, which receives, and may be larger than, the bead c of a split bushing C, the lower bead c<1> of which engages the groove b in the drill B.
GB190412542D1904-06-021904-06-02Improvements in Chucks.
ExpiredGB190412542A
(en)