Morse code is named after Samuel F. B. Morse, who led the project and held the patents, but the dot-and-dash alphabet we recognise owes most to his partner Alfred Vail, and the version used across the world today is Friedrich Gerke's 1848 revision of Vail's code. Like most inventions, it had several fathers.
Here is who did what.
Samuel Morse, the painter who wanted a telegraph
Samuel Finley Breese Morse (1791 to 1872) was a successful painter before he was an inventor. He helped found the National Academy of Design in New York in 1826 and was its president for many years, and in 1832 he became professor of painting and sculpture at what is now New York University.
In the 1830s he became convinced that messages could be sent along a wire by electricity. He was not a trained scientist, and the hard technical problem, getting a signal to travel a long way, was solved with help. Leonard Gale, who taught chemistry at New York University, helped him make the signal carry over long wires, and the physicist Joseph Henry's work on electromagnets and the relay was the basis of the practical telegraph.
Morse's own first plan for a code was a numbered dictionary: the telegraph would send numbers, and the receiver would look up the word that each number stood for.
Alfred Vail, the engineer
Alfred Vail (1807 to 1859) was a young machinist from Morristown, New Jersey. In September 1837 he happened to see one of Morse's telegraph experiments, was fascinated, and arranged to develop the system with Morse at the Speedwell Ironworks in Morristown, bringing skill, insight and money. On 11 January 1838 the two of them gave the first public demonstration of the telegraph at Speedwell.
According to most accounts, it was Vail who replaced Morse's numbered dictionary with an alphabet code: one pattern of short and long signals for each letter. To decide which letters deserved the shortest patterns, he estimated how often each was used by counting the type in a local newspaper's type cases. The commonest, E, got a single dot, ., and T a single dash, -.
Vail also invented the first telegraph sending key and improved the receiving equipment. Yet Morse kept the patent rights to all of the apparatus and to the code. Vail left the telegraph business in 1848, feeling that his contributions were not valued, and spent his last years in Morristown researching genealogy. A 1980 publication by Morristown's parks put it bluntly: "History glorifies Morse but credits little, or nothing, to Alfred."
Historians still argue about exactly how the work was divided, and it is fair to say Morse had the idea of a dot-and-dash telegraph and drove the project. But the alphabet itself looks like Vail's work.
Friedrich Gerke, who made it international
Vail's code, now called American Morse, used three lengths of dash and gaps inside some letters. In 1848 Friedrich Gerke simplified it for use in Germany: one length of dash, no internal gaps, and new codes for several letters and for German umlauts. His version was adopted in Germany and Austria in 1851, and in 1865 an international conference adopted a code based mostly on it. Most of the alphabet in today's International Morse code is copied from Gerke's revision, with O and P taken from a system devised by Carl August von Steinheil. The differences are covered in International vs American Morse code.
So who invented Morse code?
The fairest answer is a team:
| Person | Contribution |
|---|---|
| Samuel Morse | The idea of a single-wire electric telegraph, the project, the patents, the funding from Congress |
| Joseph Henry | The electromagnet and relay research that made long telegraph lines possible |
| Leonard Gale | Practical help getting the signal to travel long distances |
| Alfred Vail | The alphabet code, the frequency-based design, the sending key |
| Friedrich Gerke | The simplified 1848 code that became the international standard |
Morse's name stuck because he was the public face of the telegraph and the holder of its patents. That is not unusual. Plenty of inventions carry the name of the person who brought them to the world rather than everyone who made them work.
The name lives on
Whoever deserves the credit, the code is a remarkable piece of design: a full alphabet made of two signals, arranged so that the commonest letters cost the least time. You can hear how quick the short letters are by playing . - (E and T) next to --.- -.-- (Q and Y), or by typing anything into the translator.
For the wider timeline, from 1837 to today, see a short history of Morse code.