Patents Assigned to Kabushiki-Kaisha Kinsekisha-Kenkyujo
  • Mounting for plural piezoelectric vibrator units
    Patent number: 4112324
    Abstract: A piezoelectric vibrator unit has a substantially flat holder case which is provided on one side with a recess or recesses each encasing a piezoelectric vibrator plate. The bottom wall of each recess is provided therethrough with a port or ports each at a position which corresponds to an excitation electrode formed on the vibrator plate. Another side of the holder case is used for masking means for forming, for the micro-adjustment of vibration frequency, a vacuum evaporated film on the excitation electrode.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: September 5, 1978
    Assignee: Kabushiki-Kaisha Kinsekisha-Kenkyujo
    Inventors: Kazumasa Yamaguchi, Kunio Nasaki, Masanori Ohshiro