Electronic compass and other magnetic devices

Details Electronic compass and other magnetic devices Electronic compass and other magnetic devices

1988-03-04

1990-04-17

Cuchlinski, Jr., William A.

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

G01C 1730

Patent

active

049168215

ABSTRACT:
Concentrated lines of flux through two loosely mounted magnetically contacting reeds are intermittently mechanically interrupted by breaking the contact infinitesimally, thus deriving a near-maximum generated EMF in a coil surrounding the contact. A piezo transducer driven in feedback arrangement by an oscillator provides an energy-efficient drive for a hammer that irregularly strikes one of the reeds. A compass based on this noncoherent modulation of a flux path is shown and other devices based upon this principle are mentioned.

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Roland Pease, Nature, Jul. 1987, vol. 328, p. 12.
David Arnold, The Boston Globe, "The Fluxgate, a Compass That Can Do Much More Than Point To North, Getting Cheaper, More Popular", Jun. 1, 1987, p. 41.

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