[PT032AAHx], Technical Note, Thomas Alva Edison, July 25th, 1887
https://edisondigital.rutgers.edu/document/PT032AAHx
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Metadata
- Title
- [PT032AAHx], Technical Note, Thomas Alva Edison, July 25th, 1887
- Editor's Notes
- Dyer Patent Railway signals-- I put a large permanent magnet on Locomotive with poles of iron flush with Rail in center track In a closed box between the ties is an electromagnet the box is poured full insulating compound-- The poles project above box & are about 3 or 4 inches from the polar faces of magnet on Locomotive-- when Loco is running the passage of the permanent magnet induces a powerful current into the fixed rail magnet & the current passing along the track to any required distance to control a semaphore signal when the train enters it sets up a current which blocks both one energizing the magnet that is fixed has its coils reversed & hence sends reverse current to unblock-- An electromagnet could be used on Loco energized by battery or dynamo-- and any form of fixed magnet could be used-- I want claim broad principle of actuating signals by induced current without electrical or mechanical contacts & by motion of train.
- Author
- Edison, Thomas Alva
- Mentioned
- Seely, Henry W
- Date
- 1887-07-25
- Type
- Technical Note
- Folder ID
- PT032AAH-F
- Microfilm ID
- 114:108
- Document ID
- PT032AAHx
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- Has Version
- Archive.org Viewer, Microfilm Series Reel 114
- Item sets
- [PT032AAH-F] Railway Signaling (1887)