Patents by Inventor Kazushi Fujiwara

Kazushi Fujiwara 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).

  • Reed switch
    Patent number: 4063203
    Abstract: In a reed switch comprising an envelope, first and second stationary terminals, and an armature supported elastically on the second stationary terminals in such a manner that the innermost end portion of the second stationary terminal and one end portion of the armature are opposite to each other with a magnetic gap, each of the one end portion of the armature and the innermost end portion of the second stationary terminal is larger in sectional area than the other portion thereof, thereby to decrease the magnetic resistance of the magnetic gap and to increase the closing power of the switch. According to another aspect of the invention, the reed switch has a back stop for detaining the armature when the switch is opened.
    Type: Grant
    Filed: April 7, 1976
    Date of Patent: December 13, 1977
    Assignee: Kabushiki Kaisha Yaskawa Denki Seisakusho
    Inventors: Kazushi Fujiwara, Mituyuki Asai, Susumu Aoki