[Graphophone patents]

United States. Patent Office · 1878 · Washington, D.C., Govt. Print. Off. · 18 pictures

A United States Patent Office collection of patent drawings from 1878, issued by the Government Printing Office in Washington, D.C., for inventors and engineers working on sound recording machines. The pictures are black-and-white line drawings of mechanical parts such as styli, diaphragms, cylinders, levers and frames, drawn with precise hatching and lettered reference numerals. A designer might take from them the clean technical diagram style, with fine cross-hatching, labelled callouts and exploded side views of early machinery.

Phonograph · Patents

Internet Archive · Smithsonian Libraries · Public domain (published before 1931) · More from this library