Patents by Inventor Alphonse Ernst Zumsteg

Alphonse Ernst Zumsteg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Quartz piezo-electric element vibrating in a coupled mode
    Patent number: 4071797
    Abstract: This specification describes a rectangular quartz crystal which has been igned with specific length-width-thickness ratios whereby vibration takes place in the thickness shear mode strongly coupled with flexural vibrations. The choice of the specific ratios permits an improved performance insofar as dynamic capacitance range, temperature dependent variations of frequency and finally quality factor are concerned. The dimensions and proportions make the crystal suitable for use as a high frequency time piece resonator.
    Type: Grant
    Filed: January 20, 1976
    Date of Patent: January 31, 1978
    Assignee: Societe Suisse pour l'Industrie Horlogere Management Services S.A.
    Inventors: Alphonse Ernst Zumsteg, Jean Engdahl, Raymond Huguenin