United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 1069
being constrainedby the movement of the diaphragm to movewith relation to the photo-sensitive surface 50to cause the light beam to travel in a sinuouspath corresponding to sound waves. In testimony that I claim the foregoing asmy own, I have hereto affixed my signaturein the presence of two… … -^^ 3.
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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