Level

US5199177A · kind A · utility

Assignee

• Stanley Tools, a Division of The Stanley Works · US

Inventors

• Walter J. Hutchins · Town of West Hartford, US
• John H. Wilcox · Newport, US
• James Jackson · Lexington, US
• John M. Clark · Ann Arbor, US

Key dates

• Filing date: May 14, 1992
• Grant date: Apr 6, 1993
• Expiry date: May 14, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C9/32
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A lighted level including a frame having parallel working surfaces and an inner connecting web having an aperture with a pair of notches for supporting a liquid-containing vial. The level includes a light emitting diode for illuminating the vial. The level is constructed for automatic drop-in assembly of each of the component parts, including a printed circuit board containing the lighting circuitry, without requiring wires, screws, pins, pegs or bolts.