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US 6,647,634 B2Granted
Reliably sensing bubble leveling means
OwnerSue-Zeng Yang, Hou-Ging Chininventors
Life of this patent
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Abstract
A bubble leveling device includes a bubble level having a gas bubble formed on a liquid surface, an illuminator projecting light through or towards the gas bubble for producing an optical image of the gas bubble, and a sensor having a coordinate screen for locating the image of the gas bubble on the screen for checking the coincidence or deviation of the image with or from the coordinate center of the screen for reliably checking the horizontality or inclination angle as measured by the bubble leveling device.
Claims4
A bubble leveling means comprising:
- a closed bubble level having a liquid filled in the level, a gas bubble floating on the liquid, and a transparent upward-concave arcuate top wall formed on a top of a bottom wall of said level, whereby upon reaching of said gas bubble to a central apex of said upward-concave arcuate top wall, a horizontality is indicated by said level;
- a float normally floating on the lowest position in a downward-concave arcuate surface of the gas bubble for producing an optical image of said float on a sensor when optically projected by an illuminator adjacent to said level;
- and
- said sensor having a screen adjacent to said level for receiving, displaying and indicating said optical image;
- whereby upon obtaining the horizontality by said level, said optical image will be presented at a center of said screen;
- and upon forming an inclination angle as deviated from said horizontality, said optical image will correspondingly move to be deviated from the center on said screen for indicating the inclination angle.
3 more elements
Dependencies are inferred from the claim text.