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:
Jul. 16, 1996
Filed:
Feb. 16, 1994
Kaoru Kumagai, Tokyo, JP;
Shinji Kawashima, Tokyo, JP;
Kiichi Furuya, Tokyo, JP;
Fumio Ohtomo, Tokyo, JP;
Kabushiki Kaisha TOPCON, Tokyo, JP;
Abstract
An electronic leveling apparatus and associated leveling staff are capable of measuring the height difference of the positions automatically through the opto-electric conversion of the image of a pattern formed on the leveling staff. The apparatus has a turning drive means for turning it on a horizontal plane, a light emission means for emitting a light beam to the outside, a light reception means for receiving a reflected light of the emitted light beam, and a signal processor for controlling the turning drive means in response to the received signal so that the apparatus is oriented to the leveling staff automatically.