Method and apparatus for reducing error when measuring...

Details Method and apparatus for reducing error when measuring... Method and apparatus for reducing error when measuring...

2005-06-07

2005-06-07

Gibson, Randy W. (Department: 2841)

Weighing scales

Self-positioning

Repositioning in response to deflection under load

C177S245000, C177S253000, C177S262000, C374S014000, C073S073000

Reexamination Certificate

active

06903281

ABSTRACT:
The invention relates to an instrument and method for measuring minute quantities of weight, including a pan for holding a sample to be weighed, a chamber for forming an enclosure about the pan, and a hang-down wire coupled to the pan for suspending the pan within the chamber. The pan has volume less than 0.020 cm3and the hang-down wire has a volume less than 0.01 cm3. The invention may also include a carrier gas, placed within the chamber, having a generally consistent density over changes in temperature.

REFERENCES:
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patent: 5055264 (1991-10-01), Czarnecki
patent: 5368391 (1994-11-01), Crowe et al.
patent: 5440120 (1995-08-01), Roberts et al.
patent: 5588746 (1996-12-01), Minobe et al.
patent: 6057516 (2000-05-01), Nakamura et al.
patent: 6241876 (2001-06-01), Tsao et al.
patent: 6250799 (2001-06-01), Kinoshita et al.
patent: 6279387 (2001-08-01), Kikuchi

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