United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 729
aid pivot, one arm of which le-ver is attached to the diaphragm, the otherand shorter arm carrying a stylus, and a cen-tering-spring attached at one end to saidsound-box and bearing at its other endagainst a flattened portion on the pivot. In testimony whereof I affix my signaturein presence of two…
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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