File:US14917 David E. Hughes Patent.pdf
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US14917_David_E._Hughes_Patent.pdf (file size: 487 KB, MIME type: application/pdf)
Summary
To all whom it may concern.: Be it known that I, David E. Hughes, of Louisville, in the State of Kentucky, have invented a new and Improved Mode of Electro Magnetic Telegraphic Communication, which I term or designate as "Hughes' Compound Magnetic and Vibrating Printing-Instrument.” The nature of my invention consists in the manner of using natural and electromagnetism in its application to machinery for telegraphic purposes, and in the employment of a vibrating spring for the regulation of this and other machinery.
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current | 17:03, 12 December 2019 | (487 KB) | Hswarford (talk | contribs) | To all whom it may concern.: Be it known that I, David E. Hughes, of Louisville, in the State of Kentucky, have invented a new and Improved Mode of Electro Magnetic Telegraphic Communication, which I term or designate as "Hughes' Compound Magnetic and... |
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