isochronism

It was thus with the application of the isochronism of the pendulum to the making of instruments for measuring intervals, astronomical and other.

From Essays on Education and Kindred Subjects Everyman's Library by Herbert Spencer

In order to produce a note, the succession of shocks must not deviate much from isochronism.

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

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

And it was not until the close of the year 1750 that Pierre Le Roy and Ferdinand Berthoud studied the conditions of isochronism pertaining to the spiral.

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

We obtain the notes of both circles, one of which is the octave of the other, if there is no isochronism between the shocks.

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