Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 465
ortising ma-chine forms an exception among wood-working tools, as it is the only machine that performs itswork by positive and intermittent blows. In other machines, when the resistance is too great, thebelts yield and no damage occurs; but with the mortiser all parts must be so proportioned and… … 1. Machines having a fixed position of the eccentric-shaft, with a positive and continuous motionof the chisel-bar, where the wood has to be raised or brought to the chisel to receive its action.These machines have a great advantage in the simplicity of their construction and the high speed atwhich…
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