United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 433
hamber, astylus-lever pivoted between its ends on said casing and having one arm engaging the dia-phragm, and a stylus on the other arm vi-brating perpendicular to the record. Jn testimony whereof I have signed thisspecification in the presence of two subscrib-ing wit noses. THOMAS II. MACDONALD.… … v»>>>>>ym>^ Fig 10
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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