Episode 1 of 3
Davy Invents Practical Relay
- When
- 1837
- Where
- unknown
Edward Davy invented the practical metallic make-and-break relay in 1837, which became the relay of choice for telegraph systems.
In 1837, Edward Davy invented the much more practical metallic make-and-break relay. This device became the relay of choice in telegraph systems and a key component for periodically renewing weak signals, improving the reliability of electrical telegraphy.
Sources
- Electrical telegraph Wikipedia, revision of 2026-10-04
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.