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:
Jan. 09, 2001
Filed:
Nov. 19, 1998
Takaaki Yamazaki, Tokyo, JP;
Kabushiki Kaisha Topcon, Tokyo, JP;
Abstract
Conventional reference beam detecting apparatus require the use of transits and levels in addition to the reference beam detecting apparatus itself to make the operation of determining the height of construction very cumbersome. A reference beam detecting apparatus,according to the invention comprises a first light receiving section,and a second light receiving section,The angle SFH formed by the first light receiving section,and the front surface of the apparatus main body and the angle SFG formed by the second light receiving section,and the front surface of the apparatus main body are same and equal to about 30° . The reference beam detecting apparatus further comprises a light receiving position display section,a notch,and a data display section,An angular displacement computing circuit determines the angular displacement of the reference beam detecting apparatus,on the basis of the output signal of a laser beam detecting circuit to correct the error due to the angular displacement of the reference beam detecting apparatus.