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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 376

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 376
1531/. REFLECTING DRAW-ING BOARD.—A vertical plate ofglass in a frame on a drawing board.The picture on one side and a plainsheet of paper on the other side ofthe glass. On looking into theglass on one side the picture isplainly projected on the other, andcan be readily traced with a pencil. … tEe graduated paper on 1531^. SELF REGIS-TERING BAROMETER.—Four aneroid disks are con-nected in series and in contactwith the lever R and linked tothe index lever L, its endholding a pencil that marksthe variation of pressure ona drum driven by a clock. 370 DRAUGHTING DEVICES. 1531A. DOTTING…

Mechanical movements

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