The Shortt–Synchronome free pendulum clock is a complex precision electromechanical pendulum clock invented in 1921 by British railway engineer William...

Riefler pendulum clocks, accurate to about 10 milliseconds per day. In 1929 it switched to the Shortt-Synchronome free pendulum clock before phasing in...

the founder of the electronic clock company Synchronome, which found success in 1921 with the Shortt-Synchronome clock. He was also influential in the...

phase-locked loop was used in 1921 in the Shortt-Synchronome clock. Spontaneous synchronization of weakly coupled pendulum clocks was noted by the Dutch physicist...

Surrey, Synchronome Ltd of Alperton, north-west London, and Gillett and Johnson. Shortt–Synchronome clock Pendulum clock Escapement "USNO Master Clock". Archived...

of power interruption. Master clock Shortt-Synchronome clock Automatic watch Elliott, Rod. "Build a Synchronous Clock". Elliott Sound. Archived from...

Yvonne Shortt (born 1972), American social practice installation artist. Shortt-Synchronome clock, a free pendulum clock, patented in 1921. Polly Shortts, a...

1920s with the very accurate Shortt-Synchronome clock and later in the 1930s when quartz clocks began to replace pendulum clocks as time standards. Apparent...

Hamilton Shortt (1881–1971) was a railway engineer and noted horologist, responsible for the design of the Shortt-Synchronome free pendulum clock, a widely...

pendulum clocks were controlled electrically. The Shortt–Synchronome clock, an electrically-driven pendulum clock designed in 1921, was the first clock to be...

The most accurate commercially produced pendulum clock was the Shortt-Synchronome free pendulum clock, invented in 1921. Its Invar master pendulum swinging...

Invar and Elinvar 1931 William Hamilton Shortt (1881-1971) - noted horologist who devised the Shortt–Synchronome clock 1946 Frank Hope-Jones (1867–1950) -...

commercially produced mechanical clock was the electromechanical Shortt-Synchronome free pendulum clock invented by W. H. Shortt in 1921, which had an uncertainty...

Gascoigne reestablished the Time Service at Mount Stromlo, using two Shortt-Synchronome clocks and astronomical observing equipment that he and his colleagues...

North America: Railroad chronometers 1921 - The Shortt-Synchronome free pendulum clock becomes the first clock more accurate than the rotation of the Earth...

He served in this post until his death in 1941. Clock-wise, the Shortt Synchronome Free Pendulum clock entered service at the Royal Observatory in 1923...