Patent ID: 7565748

Claim:
A portable digital horizontal inclinometer, comprising a housing ( 1 ) having a back cover ( 11 ) with an outer surface and a plurality of cavities; a roller bearing ( 2 ) having a shaft with a tip and a housing, and having a first axis of rotation; a capacitive displacement sensor ( 3 ) having a rotatable disk ( 31 ) and a grounding finger ( 32 ); a supporting plate ( 5 ) for supporting said capacitive displacement sensor ( 3 ); and a damping device ( 4 ) comprising a pendulum ( 41 ), a plurality of magnetic slices ( 42 ) and a plurality of ferrite beads ( 43 , 44 ); wherein said rotatable disk ( 31 ) and said pendulum ( 41 ) are inflexibly attached to said shaft; said grounding finger ( 32 ) is disposed on said tip; at least two said magnetic slices ( 42 ) are inserted into said cavities in a way so that two adjacent magnetic slices ( 42 ) are oriented with the opposite polarity towards said pendulum ( 41 ); at least one said ferrite bead ( 44 ) is inflexibly attached to said supporting plate ( 5 ); and at least one said ferrite bead ( 44 ) parallel to said ferrite bead ( 43 ) is bonded on said back cover ( 11 ).