United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 364
he com-bination with a diaphragm composed of a plu-rality of disks, or plates, of the same diameterand having a common point of support, of apoint, or stylus, connecting all of said dia-phragm plates, or disks, substantially as de-scribed. In testimony whereof I have affixed my sig-nature in… … Em.3. (No Model.) No. 503,610. J. W. MACKINTOSH. PHONOGRAPH. 3 Sheets—Sheet 2. Patented Aug. 22, 1893. jv ,M- -Jl-
Phonograph · Patents
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