Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 373
crew arm arounda fixed centre describes a helical curve. c k^^^ kxxxx^vr I5I9. GREAT CURVE DELINEA-TOR. — Thin-edged ^ discs 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… … 1520. CONCHOID DELINEATOR,of Nicomedes. A slotted head T-piece,A, B; a slotted arm, G H, with traversepin at F. Distance between F, H, andpin at E may be variable to suit therequired condition of curve. Pencil atH delineates a conchoidal curve, usedin architectural drawings for the linesof columns.…
Mechanical movements
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