isochronism

Thus, in 1720, Julien Leroy occupied himself working out the proper shapes for the inclines to produce this desired isochronism.

From Watch and Clock Escapements A Complete Study in Theory and Practice of the Lever, Cylinder and Chronometer Escapements, Together with a Brief Account of the Origin and Evolution of the Escapement in Horology by Anonymous

To achieve this it was necessary to have a watch or clock which should preserve a perfect isochronism, in defiance of the state of the sea or differences of temperature.

From Celebrated Travels and Travellers Part 2. The Great Navigators of the Eighteenth Century by Léon Benett

The discovery by Galileo of the isochronism of the pendulum, followed by Huyghens’s adaptation of that principle to clocks, has been one of the greatest aids to accurate observation.

From History of Astronomy by George Forbes

The isochronism of the vibrations of the pendulum inferred from this observation was not published or put to practical application in clocks for nearly sixty years afterward.

From Inventions in the Century by William Henry Doolittle

Effects produced when the isochronism of the shocks is not perfect.

From Scientific American Supplement, No. 401, September 8, 1883 by Various