US Patent: 879,532
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| Space Telegraphy
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Patentee:
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| Lee De Forest (exact or similar names) - New York, NY |
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Patent Dates:
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| Applied: |
Jan. 29, 1907 |
| Granted: |
Feb. 18, 1908 |
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Patent Pictures:
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Joel Havens
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Description: |
| This was the first patent for a Electronic Vacuum Tube.
Abstract:
My invention will be described with reference to the drawings which accompany and form a part of the present specification, although it is to be understood that many modifications may be made in the apparatus and systems herein described without departing from the principles of my invention.
Claim:
An oscillation detector comprising an evacuated vessel, an electrode enclosed there-in, means for heating said electrode, a second electrode enclosed within said vessel, a local circuit having its terminals electrically connected to said electrodes, a conducting member enclosed within. said vessel and located between said electrodes, and means for conveying the oscillations to be detected to the first mentioned electrode and said conducting member.
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