[Graphophone patents]

United States. Patent Office · 1878 · Washington, D.C., Govt. Print. Off. · 17 pictures

A United States Patent Office compilation of graphophone patent drawings, published in Washington, D.C. in 1878 for patent examiners, inventors and the phonograph trade. The pictures are mechanical line drawings of numbered figures, with lettered parts, cutaway sections and signed witness and inventor blocks at the foot of the page. A designer could draw on their clean, technical diagram style, with labelled parts and exploded views of early sound-recording machinery.

Phonograph · Patents

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