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Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 372

An illustration from Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary, 1917, leaf 372
1522. TRAMMEL FOR DRAWING ELLIPSES. —^Grooves at right angles direct two studs on aencil bar for the elliptical motion of the pencil.Also called an ellipsograph.

Mechanical movements

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