Appeal No. 96-0998
Application No. 08/180,288
BACKGROUND
The claims
Appellant’s Claim 1 is illustrative of the invention
involved in the present appeal:
1. An impact sensor comprising:
a non-ferrous housing having a passage therein and
an end member provided at each end of said housing for
enclosing said passage at opposite ends thereof;
a first magnetic member mounted in and being
rigidly secured in said housing, a second magnetic
member being slidably positioned in said passage for
movement in an axial path, each of said first and
second magnetic members having opposite magnetic poles
and being positioned in said passage with a pair of
poles of like polarity facing each other and with only
the repelling magnetic force between said poles of like
polarity serving to maintain said spaced relation
between said first and second magnetic members;
voltage generating and pick off means comprising a
single inductance coil winding circumferentially wound
about said housing, said inductance coil winding having
a bore and being positioned intermediate said first and
second magnetic members and so disposed relative to the
path of said magnetic member so that an impulse voltage
is induced in said single winding by movement of said
second magnetic member in said axial path responsive to
an impact force acting on said housing, said impact
force being of a magnitude which causes said second
magnetic member to overcome the repelling magnetic
force between said first and second magnetic members so
that said second magnetic member will move into said
bore of said winding and thereby generate said impulse
voltage; and
2
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