As early as 1934, the precision of a quartz clock made it possible to detect variations in the rotation rate of the Earth. However, it was only with the first miniature batteries that quartz was able to enter the wristwatch.
Engineers from Lip (France) and Elgin (US) worked together to produce the first prototype electric wristwatches. Although differently constructed, both contained an electric circuit comprising a battery, a coil and a microcontact. They were as accurate as a mechanical watch thanks to their conventional balance and spring. They were commercially launched five years later.
February 6th, American electrical engineer Jack St. Clair Kilby filed a patent for the first integrated circuit. While he is credited with the invention of the integrated circuit, a more reliable version that was patented around the same time by Robert Noyce would be the basis for all future developments.
Electrical watches were as accurate as a mechanical chronometer.
Commercial launch of the Dynotron electronic wristwatch with balance and spring.
The Centre Electronique Horloger in Neuchâtel, Switzerland, produced the first prototype quartz wristwatch, Bêta 1, which was entered into chronometry competitions the following year. Results showed its precision to be twelve times that of mechanical chronometers and six times that of tuning-fork chronometers.