Rhythm Watch Co., Ltd.

Masaru Itami

Yasue Ashibe

Kunio Tatusawa

A pendulum arrangement for a clock movement in which such arrangement has a pendulum arm being mounted to swing freely at a pendulum arm supporting means which is installed on a clock movement housing, and said pendulum arm supporting means consists of a pendulum arm supporter which is pivotally held with free rotation on the clock movement housing so that the pendulum arm supporter can rotate and adjust its supporting position in accordance with the swinging state of the pendulum arm in the inclination of the clock movement.

Pendulum arrangement for clock movement

In a pendulum arrangement of a pendulum clock having a pendulum arm hanging a pendulum disc on one end and being pivotally and swingingly supported at a supporting portion of a base plate, an electromagnet fixed to the base plate and a permanent magnet arranged facingly to the electromagnet and swinging together with the pendulum arm for the purpose of swinging a pendulum by means of electromagnet force of the electromagnet and the permanent magnet, a pendulum arrangement further comprising a slip arm one end of which the permanent magnet is fixed and on the other end of which is loosely engaged with the pendulum arm at a little larger slipping torque than a driving torque which said permanent magnet receives from the electromagnet, and a pair of limit pins fixed on the both side of the swinging region of the slip arm on the base plate, wherein either one of the limit pins touches the slip arm to slip the slip arm away from the pendulum arm and the permanent magnet always swings so that it can center the electromagnet.

Growing community of inventors

Nagano, Japan

Masaru Itami