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:
May. 15, 1979
Filed:
Jul. 19, 1977
Melvin G Kramer, Riverton, WY (US);
The Brunton Company, Riverton, WY (US);
Abstract
Concentrated light beams from two or more sources are passed through a spirit level mounted in a portable housing and the presence of the light beam columns after passing through the level is detected to indicate on-level or the direction of off-level for a remote plane or surface. In one form, detection circuitry selectably lights one or a pair of indicator lamps appropriately arrayed on a display panel for establishing that the remote spirit level is in a level orientation or the direction of out-of-level. The detector circuitry can include cross-coupling to prevent an erroneous indication of the direction of out-of-level. In another form, multiple pairs of concentrated light sources and detectors are arrayed along the length of the spirit level and digital circuitry converts the detected outputs into a direct digital display and/or into a format appropriately useful for other digital data handling equipment.