Methods and systems for adjusting magnetic return path with...

Details Methods and systems for adjusting magnetic return path with... Methods and systems for adjusting magnetic return path with...

2007-03-20

2007-03-20

Kwok, Helen (Department: 2856)

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

C073S514310

Reexamination Certificate

active

11161815

ABSTRACT:
Accelerometers having higher concentration of flux closer to the proof mass. The invention includes a proof mass, an excitation ring, a magnet, a pole piece, and a coil. The excitation ring includes a ring unit and a base unit that are attached and the ring unit or base unit includes an annular groove. The magnet is mounted to the base unit and the pole piece is mounted to the magnet. The coil is attached directly to the proof mass. A gap is formed between the ring unit and the pole piece. The pole piece includes a first section that has a radius smaller than the radius of a second section.

REFERENCES:
patent: 4944184 (1990-07-01), Blake et al.
patent: 5524488 (1996-06-01), Foote
patent: 5557044 (1996-09-01), Foote et al.

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