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. 12, 2002
Filed:
Jun. 15, 2000
Kazuaki Kimura, Tokyo, JP;
Yoshiyuki Usami, Tokyo, JP;
Kabushiki Kaisha Topcon, Tokyo, JP;
Abstract
A laser beam detecting device is disclosed for detecting a laser beam which is emitted from a laser beam generator and which forms a reference plane. A power supply for a laser beam sensor used in the laser beam detecting device is turned OFF automatically when a construction machine with the laser beam detecting device attached thereto is not in operation, while upon operation of the construction machine, the resulting vibration is detected by means of a vibration sensor and the power supply for the beam sensor is turned ON. By so doing, there is attained a superior power saving characteristic and it is possible to effect operation over a long time even with use of cells or a battery.