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2 definitions found
 for Rotary shears
From The Collaborative International Dictionary of English v.0.48 :

  Shears \Shears\, n. pl. [Formerly used also in the singular. See
     Shear, n., 1.]
     1. A cutting instrument. Specifically:
        (a) An instrument consisting of two blades, commonly with
            bevel edges, connected by a pivot, and working on both
            sides of the material to be cut, -- used for cutting
            cloth and other substances.
            [1913 Webster]
  
                  Fate urged the shears, and cut the sylph in
                  twain.                            --Pope.
            [1913 Webster]
        (b) A similar instrument the blades of which are
            extensions of a curved spring, -- used for shearing
            sheep or skins.
        (c) A shearing machine; a blade, or a set of blades,
            working against a resisting edge.
            [1913 Webster]
  
     2. Anything in the form of shears. Specifically:
        (a) A pair of wings. [Obs.] --Spenser.
        (b) An apparatus for raising heavy weights, and especially
            for stepping and unstepping the lower masts of ships.
            It consists of two or more spars or pieces of timber,
            fastened together near the top, steadied by a guy or
            guys, and furnished with the necessary tackle.
            [Written also sheers.]
            [1913 Webster]
  
     3. (Mach.) The bedpiece of a machine tool, upon which a table
        or slide rest is secured; as, the shears of a lathe or
        planer. See Illust. under Lathe.
        [1913 Webster]
  
     Rotary shears. See under Rotary.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Rotary \Ro"ta*ry\, a. [L. rota a wheel. See Roll, v., and cf.
     barouche, Rodomontade, Rou['e], Round, a., Rowel.]
     Turning, as a wheel on its axis; pertaining to, or
     resembling, the motion of a wheel on its axis; rotatory; as,
     rotary motion.
     [1913 Webster]
  
     Rotary engine, steam engine in which the continuous
        rotation of the shaft is produced by the direct action of
        the steam upon rotating devices which serve as pistons,
        instead of being derived from a reciprocating motion, as
        in the ordinary engine; a steam turbine; -- called also
        rotatory engine.
  
     Rotary pump, a pump in which the fluid is impelled by
        rotating devices which take the place of reciprocating
        buckets or pistons.
  
     Rotary shears, shears, as for cloth, metal, etc., in which
        revolving sharp-edged or sharp-cornered wheels do the
        cutting.
  
     Rotary valve, a valve acting by continuous or partial
        rotation, as in the four-way cock.
        [1913 Webster]

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