Appeal No. 96-0998
Application No. 08/180,288
Chapman discloses a motion sensor in which a moveable magnet
in a tube is subject to repelling force between opposing poles of
fixed magnets. An impact or shock to a person wearing the sensor
causes the moveable magnet to move in the tube toward the fixed
magnets. Any movement of the moveable magnet results in a change
in an output signal. A processing circuit can indicate that a
threshold level of motion has been reached or exceeded. Column
1, line 63 through column 2, line 17. Oscillations of the
moveable magnet can be dampened with dampening materials in the
tube. Column 2. Lines 50-52.
Valentini discloses an accelerometer with a moveable magnet
12 subject to repelling force between opposing poles of fixed
magnets. Figure 1 shows inductance coil 8 positioned entirely
between moveable magnet 12 and fixed magnet 6. When the
accelerometer is subject to acceleration, magnet 12 moves in
relation to coil 8. This results in a proportional variation of
the magnetic flow in coil 8. Column 3, lines 18-37. Comparators
can output a signal indicating when a respective reference value
has been exceeded. Column 3, lines 47-57. That output signal
can be employed in the control of actuators used on motor
vehicles (e.g. regulating the vehicle suspension as a function of
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