Spirit level

Details Spirit level Spirit level

2006-10-10

2006-10-10

Smith, R. Alexander (Department: 2859)

Geometrical instruments

Straightedge type

Combined with level

C033S348000

Reexamination Certificate

active

07117608

ABSTRACT:
A spirit level comprising a body having a level face for setting a surface, at least one bubble vial mounted in the body, the bubble vial having a longitudinal axis generally perpendicular to the level face, and an optical transfer element fixed to the body which transfers an image of the bubble vial to a viewing plane generally parallel to the level face.

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