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SPIRIT LEVEL

  • US 20100257745A1
  • Filed: 12/08/2008
  • Published: 10/14/2010
  • Est. Priority Date: 12/10/2007
  • Status: Abandoned Application
First Claim
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1. A spirit level comprising a planar base that functions, with the level in a first orientation, as a first level face which rests, in use, on a surface of an item whose level is to be determined, the level being further provided with levelling means comprising first and second vials each filled with a liquid to form a bubble, the longitudinal axis of the first vial being substantially parallel to the plane of the planar base, the longitudinal axis of the second vial being substantially perpendicular to the longitudinal axis of the first vial, optical means being provided to provide an image of one of the vials such that the level of the surface can be determined about two axes, with the planar base resting on the surface of the item whose level is to be determined.

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