Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 375
disc by moving the screw arm arounda fixed centre describes a helical curve. 1519- GREAT CURVETOR.- DELINEA-Thin-edgeddiscs of different di-ameters are attachedto a bar or tube at adistance apart,so thattheir relative diam-ters and distance will correspond to the required radius, which maybe…
Mechanical movements
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