US Patent 913,546, Type-Casting Machine
This is a US patent specification, number 913,546, for a type-casting machine, filed in 1908 and granted in 1909 to Philip G. Nuernberger and George Rettig, Jr., for typefounders and printers. Its pictures are mechanical elevations and plan drawings of a vertical metal pot, plunger, mould and lever linkage, drawn in fine black line on white with reference numerals and lettering; a designer could take the clean technical line work and the dense, orderly arrangement of parts as a model for diagrammatic illustration.
