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Level

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Level

Details

Inventors: Hutchins, Walter J.; Wilcox, John H.; Jackson, James M.; Clark, John M.;
Assignee: Stanley Tools, a Division of The Stanley Works (New Britain, CT)
Primary Examiner: Haroian; Harry N.
Assistant Examiner:
Attorney, Agent or Firm: Chilton, Alix & Van Kirk

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.

DETAILED DESCRIPTION An object of the invention is to provide a level that can be conveniently illuminated for use in a dark or shady area.
Another object of the invention is to provide a lighted level that can be produced by automatic drop-in assembly of the lighting hardware.
Yet another object of the invention is to provide a lighted level that can be manufactured economically, requiring a minimum number of component parts.
Other objects will be in part obvious and in part pointed out more in detail hereinafter.
The invention in a preferred form is a level that is adapted for automatic assembly.
The level has a frame provided with parallel working surfaces and an interconnecting web.
The web has an aperture providing a pair of oppositely directed notches for holding a liquid-containing vial.
The vial is positioned with its ends precision fitted in the pair of notches at a preselected relationship relative to the working surfaces with the longitudinal axis of the vial generally parallel to the plane of the web.
The level includes a cover formed from front and back side cover plates mounted on opposite sides of the web.
At least one of the cover plates has an aperture for viewing the vial.
The cover has a circuit board retaining portion for supporting a printed circuit board containing lighting circuitry for illuminating the vial.
The vial is illuminated by a light source, preferably a light emitting diode (LED) which is disposed on the circuit board.
A connector electrically connects the circuit board to a power source.
Preferably, the power source is one or more batteries which are removably mounted in a battery retaining portion between the cover plates.
The connector preferably is a wireless metal device that straddles the circuit board retaining portion and battery retaining portion of the level.
More preferably, the connecting device includes a flange that is fastened to the printed circuit board and a U-shaped portion that is removably mounted on an interior mounting wall formed on one of the cover plates

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