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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 974
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W. S. O'BRIEN. AUTOMATIC STOPPING AND RELEASING MECHANISM FOR PHONOGRAPHS. APPLICATION FILED APR. 17, 1917. 1,248,533. Patented Dec 4, 1917. 3 SHEETS-SHEET 3. Fjct // … F/Cf. 13 f}<f.l6 jZfe&W J. 0'/&U+*, ATTORNEYPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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