A spirit level

A spirit level (1) comprises a planar base (14) for resting, in use, on a surface whose level is to be determined, and levelling means (27) comprising a vial (41) filled with sufficient liquid that an air bubble (47) is formed within the vial (41). The spirit level (1) comprises indicia (43, 45) rel...

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Bibliographic Details
Main Author SPARROW PAUL ANDREW
Format Patent
LanguageChinese
English
Published 03.06.2009
Subjects
ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL
GYROSCOPIC INSTRUMENTS
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
NAVIGATION
PERFORMING OPERATIONS
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
SURVEYING
TESTING
TRANSPORTING
VEHICLES IN GENERAL
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Summary:A spirit level (1) comprises a planar base (14) for resting, in use, on a surface whose level is to be determined, and levelling means (27) comprising a vial (41) filled with sufficient liquid that an air bubble (47) is formed within the vial (41). The spirit level (1) comprises indicia (43, 45) relative to which the bubble (47) moves as the orientation of the spirit level (1) is altered so as to indicate the orientation of the spirit level. Optical means (29) is provided on the spirit level (1) to provide an image indicative of the position of the bubble (47) relative to the indicia (43, 45).
Bibliography:Application Number: CN2007818467