Rocking motor for low cost quartz watch

US4128992A · kind A · utility

Assignee

• Timex Corporation · US

Inventors

• Joseph Egger · Pforzheim, DE
• Franz Mayer · Birkenfeld, DE
• Herbert Schwartz · Wurmberg, DE
• Walter Sodler · Göttingen, DE
• Jean Suard · Besançon, FR
• Wilhelm Tilse · Birkenfeld, DE

Key dates

• Filing date: Mar 21, 1977
• Grant date: Dec 12, 1978
• Expiry date: Mar 21, 1997

Classification

• Technology area (CPC G): Physics
• CPC primary: G04C13/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A rocking motor for driving an indexing element in a quartz controlled analog wristwatch is impulsed once per minute. The indexing element and the indexed "center" wheel are carried between parallel shunt plates holding the permanent magnet. The driving element is deflected by a pulse from its rest position to tension a spring, and the minute wheel is indexed when the driving element is returned by the reset spring.