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Method of adjusting resonant frequency of a coupling resonator

  • US 4,484,382 A
  • Filed: 03/30/1982
  • Issued: 11/27/1984
  • Est. Priority Date: 05/15/1981
  • Status: Expired due to Term
First Claim
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1. A method of adjusting the resonant frequency of a resonator having a plurality of coupled vibrational modes which comprises the steps of:

  • measuring the resonant frequency of the fundamental vibration at a plurality of different temperatures;

    calculating a frequency-temperature coefficient of the first order α

    by use of said different temperatures and respective resonant frequencies of the fundamental vibration;

    adding weights to or removing weights from the vibrational portion of the resonator at a first predetermined portion thereof so as to adjust the first order temperature coefficient α

    to almost zero; and

    thereafter adding weights to or removing weights from the vibrational portion at a second predetermined portion thereof so as to adjust the resonant frequency of the fundamental vibration in such manner that the frequency-temperature coefficient of the first order α

    hardly shifts.

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