The principles and progress of printing machinery (1900)
Southward, John, 1840-1902, Wilson, Frederick John Farlow. Account of modern printed machine · London : E. Menken · leaf 77
Fig. 28. —Portion of Rack showing position of Teeth and Driving-cog;;^ D, Pinion wheel. L, Teeth of rack. J, Width of rack. M, End of rack supported K, Rack end. between bars. 74 PRI^X[FLES AND PROGRESS OF this cross-bar to work freely. As the correct working ofthe rack depends greatly upon this… … Fig. 29.—Upper side of Rack, showing Parallel Motion. M M, ) Long and Short C, Pulley of Upright Spindle. N N / Bars. A B, Extreme ends of Rack. machines have been condemned as being almost useless,through the parallel motion being wrongly calculated.It will be seen that without this, the rack…
Printing machinery and supplies
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