Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 368
cumference the teeth planed off so as to permit of the return ofthe table without moving the impression cylinder, which is again throwninto gear with the rack by a catch, so that the same tooth of the rack alwaysenters the same space on the toothed wheel, and thus a good register issecured. The… … Fig. i6o.—Napiers Platen Machi7ie. construction,but driven by steam power, are used in lithographic printing;and in some of these machines advantage is elegantly taken of the factthat, when a wheel rolls along, the uppermost point of its circumference isalways moving forward at exactly twice the…
Inventions
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