Automatic optical levelling, plumbing, and verticality-determining apparatus
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United States of America Patent
Stats
-
Mar 14, 2000
Grant Date -
N/A
app pub date -
Feb 17, 1998
filing date -
Jul 10, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic optical levelling, plumbing and verticality-determining appartus includes: a base, a supporting and driving means adjustably standing on the base for supporting a frame having a plumb device secured to a horizontality calibrator universally pendulously mounted on the frame, a pair of plumb-line illuminators respectively secured on a top and a bottom portion of the plumb device for emitting an upper and a lower optical beam towards a ceiling and a ground floor for calibrating a vertical plumb line, a horizontal-line illuminator and a vertical-line illuminator symmetrically disposed on opposite ends of a T-shaped adapter mounted on a top of the plumb device and the horizontality calibrator for respectively emitting a horizontal optical line and a vertical optical line for determining or calibrating a horizontal plane and a vertical plane.
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