Geometrical instruments – Indicator of direction of force traversing natural media – With viewing aid
Reexamination Certificate
2006-04-11
2006-04-11
Bennett, G. Bradley (Department: 2859)
Geometrical instruments
Indicator of direction of force traversing natural media
With viewing aid
C033S381000
Reexamination Certificate
active
07024781
ABSTRACT:
A vial illumination feature for a tool, such as a level, is configured so as to emit light toward a vial when the tool is used in a darkened environment. The vial extends across an opening or a space defined by the tool, and one or more vial retainer members engage the ends of the vial to maintain the vial in position within the opening or space. The vial illumination feature is carried out by forming the one or more vial retaining members of a luminescent material. The luminescence of the one or more vial retaining members functions to absorb light when the tool is exposed to light, and to emit light toward the surfaces of the vial when the tool is in a darkened environment, to illuminate the vial and to enable the bubble of the vial to easily be viewed.
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International Search Report dated Sep. 4, 2003.
Bennett G. Bradley
Boyle Fredrickson Newholm Stein & Gratz S.C.
Johnson Level & Tool Mfg. Co. Inc.
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