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:
Apr. 21, 1998
Filed:
Jun. 13, 1995
Yuzuru Tanaka, Daito, JP;
Daishowa Seiki Co., Ltd., Osaka, JP;
Abstract
The invention is a level detector having an elongated level tube containing a bubble in a liquid, a detector body enveloping and supporting the level tube, a projector for emitting light, a reflector for directing the emitted light across the level tube, a photoelectric sensor for sensing the light arriving from the level tube, the sensor having a plurality of separate photoelectric receptor elements, a discriminator circuit for identifying selected receptor elements to determine the location of light arriving across the level tube without interference by the bubble therein and thus to detect the levelness of the detector body and of any surface on which the body is disposed, and at least one level indicator for providing a readout of the levelness.