Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 121
two upright screws of equal pitch, which are containedwithin the uprights and work in nuts, forming part of the tool-box. Thepieces carrying the tools are moved horizontally by the screws which areseen to pass along the tool-box, and these screws receive a certain regu-lated amount of motion at… … 94. TOOLS. of the cylinders which carry the cutters is drawn in alternate directions atthe end of each stroke, the effect being to turn the cutters half round, soas always to present their cutting edges to the work. There are also con-trivances for maintaining the requisite steadiness in the tools…
Inventions
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