United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 374
grooved surface of thecylinder and engages therewith, a stationarjshaft on which the cylinder may turn andslide, a diaphragm-holder hinged to the pho-nograph-frame and adapted to be automati- 125cally raised by the movement of the said cyl-inder and thereby successively raise the re-producing… … ri^.2.
Phonograph · Patents
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