Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Reexamination Certificate
2006-09-05
2006-09-05
Kwok, Helen (Department: 2856)
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
C073S514210, C073S514360
Reexamination Certificate
active
07100447
ABSTRACT:
A force rebalance accelerometer (20) includes a silicon dioxide-based proof mass (28) having capacitive elements (40) engaged with excitation rings (61) made from alloys of Super Invar. The magnet assembly includes an excitation ring, a magnet, and a pole piece (65). The Super Invar of the excitation rings (61) substantially matches the coefficient of thermal expansion of the silicon dioxide-based proof mass (28) to substantially reduce distortion signals caused by temperature changes. Movement of the accelerometer causes the capacitive elements (40) to produce a signal proportional to the movement acceleration and not by temperature changes experienced by the accelerometer.
REFERENCES:
patent: 1689814 (1928-10-01), Brace
patent: 3702073 (1972-11-01), Jacobs
patent: 3999700 (1976-12-01), Chalmers
patent: 4182187 (1980-01-01), Hanson
patent: 4250757 (1981-02-01), Hanson
patent: 4394405 (1983-07-01), Atherton
patent: 4400979 (1983-08-01), Hanson et al.
patent: 4441366 (1984-04-01), Hanson
patent: 4555944 (1985-12-01), Hanson et al.
patent: 4555945 (1985-12-01), Hanson
patent: 4592234 (1986-06-01), Norling
patent: 4620442 (1986-11-01), MacGugan et al.
patent: 4697455 (1987-10-01), Norling
patent: 4726228 (1988-02-01), Norling
patent: 4853298 (1989-08-01), Harner et al.
patent: 4872342 (1989-10-01), Hanson et al.
patent: 4932258 (1990-06-01), Norling
patent: 4944184 (1990-07-01), Blake et al.
patent: 5024089 (1991-06-01), Norling
patent: 5085079 (1992-02-01), Holdren et al.
patent: 5090243 (1992-02-01), Holdren et al.
patent: 5097172 (1992-03-01), Becka
patent: 5111694 (1992-05-01), Foote
patent: 5182949 (1993-02-01), Rupnick et al.
patent: 5203210 (1993-04-01), Terry et al.
patent: 5212984 (1993-05-01), Norling et al.
patent: 5220831 (1993-06-01), Lee
patent: 5532665 (1996-07-01), Foote et al.
patent: 6727787 (2004-04-01), Worth et al.
patent: 6846368 (2005-01-01), Katsuragi et al.
Black Lowe & Graham PLLC
Honeywell International , Inc.
Kwok Helen
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