United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 957
moving the same in theopposite direction, said wire being so ten-sioned that the force exerted thereby on saidmovable electrode varies for all positions ofsaid electrode directly as the force exerted 55thereon by said magnetic means. In testimony whereof, I have hereuntosubscribed my name this 17th… … .WITNESSES
Phonograph · Patents
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