Laser activated audible signal emitting leveler
US7350305B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 2006 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Feb 21, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C9/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention pertains to the leveling device applying the optical interaction between a laser beam and a freely floating air bubble confined in a transparent, liquid-filled vial. When the air bubble is impacted by the laser beam, the curved surface of the air-bubble deflects the beam toward the end of the vial, where a photo-electric device is positioned. The photo-electric device activates a sound emitter such as a buzzer. The function of the level being based on the optical interaction between a laser beam and the curvature of an air-bubble, it is highly accurate and consistent. It is applicable for vertical and horizontal settings, has an adjustable arm for secure attachment to structural frames or other objects. No direct eye and manual contact with the device is needed while in operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.