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Expired
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John Alexander Rooney
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Individual
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Individual
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Publication of GB189806243ApublicationCriticalpatent/GB189806243A/en
6243. Rooney, J. A. March 14. Squares; protractors.- A protractor B is fixed to a head A which is made i two disconnectible parts. When the instrument is used as a protractor, the lower part is removed so that the instrument can lie flat on the paper. A graduated blade C is hinged to the head by a hollow pivot c, and can be clamped at D at any required angle. The blade may have one edge radial, or it may be slotted and one edge of the slot may be radial.
GB189806243D1898-03-141898-03-14An Improved Combined Square and Protractor.
ExpiredGB189806243A
(en)