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Alphonsus Joseph Bull
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Gripping Jigs, Holding Jigs, And Positioning Jigs
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Abstract
11,929. Bull, A. J. May 25. Compasses, drawing. - Relates to beam compasses. The clamp a of the adjustable leg has a guide-bar g, preferably of equilateral triangular section, on which slides the block f as it is moved by the fine adjustment screw c.
GB189811929D1898-05-251898-05-25An Improvement in Beam Compasses.
ExpiredGB189811929A
(en)