A Dictionary of Arts, Manufactures, and Mines, Vol. 2 of 2: Containing a Clear Exposition of Their Principles and Practice (Classic Reprint) - Tapa dura

Sinopsis

Excerpt from A Dictionary of Arts, Manufactures, and Mines, Vol. 2 of 2: Containing a Clear Exposition of Their Principles and Practice

Messrs. Schlesin zer Ce. Also exhibited a paging machine, the capabilities of which are similar to the above, but somewhat difi'erentl y obtained. The numbering discs in this instance are provided with ten teeth, with a raised figure on the end of each tooth; and they receive the change motion from cog-wheels mounted below them on the same frame. At. Each descent of the frame a stationary s ring-catch or hook-piece drives round the wheel one tooth, that gears into the tecti of the units disc, and thereby causes the units disc to bring forward a fresh figure. The toothed wheels are some what narrower than the numbering discs, but one tooth of each wheel is enlarged late rally to about double the size of the other teeth; so that at the completion of every revolution of the wheel the projecting tooth shall act 0 on a tooth of the next disc, and carry that disc forward one tenth of a revolution. Y this means the requisite movements of the discs for effecting the regular progression of the numbers are re daood; the first wheel driving its own disc, and communicating motion at interv to the next disc, and the other wheels each receiving motion at intervals from the disc with which it is connected, and transmitting motion, at still greater intervals of time, to the next disc.

The machine is caused to print the figures in duplicate by drawing the spring-catch out of action at every alternate descent of the frame, and thereby preventing any change of the figures taking place until after the next impression.

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