Title:
【発明の名称】釣り合わされた正規化温度係数を有する質量測定装置
Document Type and Number:
Japanese Patent JP3398865
Kind Code:
B2
Abstract:
A mass determination device includes a combination of an elastic element connected with a mass holder. The combination has a normalized temperature coefficient of frequency substantially equal to zero over a temperature range of intended use for the mass determination device, whereby mass determination accuracy of the device during temperature change in the range is enhanced. The elastic element has a first normalized temperature coefficient of frequency over the temperature range. A second normalized temperature coefficient of frequency over the temperature range attributable to the mass holder is determined. The first normalized temperature coefficient and the second normalized temperature coefficient are substantially counterbalanced over the temperature range, for example, through material selection and/or heat treatment of the elastic element and/or material or geometry variation of the mass holder.
Inventors:
Hassel, David, Earl.
Application Number:
JP2000553775A
Publication Date:
April 21, 2003
Filing Date:
May 18, 1999
Export Citation:
Assignee:
Raplet and Patashnik Company, Incorporated
International Classes:
G01G3/16; G01G3/18; G01N5/02; (IPC1-7): G01G3/16; G01G3/18; G01N5/02
Domestic Patent References:
| JP56154644A | ||||
| JP2161323A | ||||
| JP9196741A | ||||
| JP9218080A | ||||
| JP247690B2 | ||||
| JP26334Y2 | ||||
| JP3502369A |
Other References:
【文献】特許3314187(JP,B2)
【文献】特許2622763(JP,B2)
【文献】米国特許3926271(US,A)
【文献】特許2622763(JP,B2)
【文献】米国特許3926271(US,A)
Attorney, Agent or Firm:
Hirotsugu Yoshioka (1 person outside)
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