Abstract
In this mechanism none of the sort of gear and escapement is used. At every swing of the pendulum, it receives impulse by the falling weight which is raised by means of an electromagnet. That is, in the same direction of the pendulum, the top of suspension chop is carried a short distance (2 or 3 microns), immediately before the pendulum almost immediately crossed the line of center. The pendulum is entirely free, and the principal part of the mechanism is free from friction, therefore it does not need any supply of oil. The pendulum is suspended in an air-tight case placed in a room maintained at constant temperature, so that it is subjected to low air pressure. Therefore the period of the pendulum is rendered free from the effect of the disturbing influences due to fluctuation of air pressure, temperature, escapement friction, motive force, etc.
