The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2001
Filed:
Oct. 28, 1998
Wilfried Piske, Heerbrugg, CH;
Gerhard Predl, Goetzis, AT;
Heinz Bernhard, Berneck, CH;
Martin Koeppel, Widnau, CH;
Leica Geosystems AG, Heerbrugg, CH;
Abstract
A laser levelling instrument with a levelling base (,) and fine self-levelling of the laser beam (,) has an inner cylinder (,) which bears aligning elements and is suspended in an oscillating manner inside an outer cylinder (,). The laser levelling instrument is characterized in that the outer cylinder (,) and the inner cylinder (,) form a capacitor system with opposite electrode faces; the outer cylinder (,) is joined at right angles to the base (,) and is centred with respect to the beam axis (,); and signals for detecting the oscillating position of the inner cylinder (,) may be derived from the capacitor system.