isochronism

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

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

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 Doolittle, William Henry

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

If the isochronism is but little impaired, we obtain a note corresponding to the mean interval of the shocks.

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

Clocks provided with this escapement keep reasonably good time; the resistance of the recoils compensate in a measure for the want of isochronism in the oscillations of the pendulum.

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