engages the cutting of these cards in the the toothed rack on the outer copper plate of the chart be- surface of ring 8. Turning this comes not only a matter of milled wheel 18 thus revolves skilled labor, but also a respon- the tool carrier at the will of the sibility, notwithstanding that… … and the other 7, sions. The Ourdan Engraving Machine in Use. The Machine Set for Engraving the Compass Card. and either can Now the work be used at will. is done by ma- One revolves the chinery, the deli- rings 3 and 2 c a t e, accurate (here mechanic- little apparatus ally one piece) employed…
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