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James Neilson Buchanan
John Wilson
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Individual
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Individual
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Publication of GB190827073ApublicationCriticalpatent/GB190827073A/en
27,073. Buchanan, J. N., and Wilson, J. Dec. 14. Punching.-Removable bolsters e are held by screw couplings h<1> provided with tommy holes h<2>. Punches are similarly held and are shaped as shown ; the dies are tapered over part of their length both inside and outside.
GB190827073D1908-12-141908-12-14Improvements relating to Metal Punching Machines
ExpiredGB190827073A
(en)