Geometrical instruments – Straight-line light ray type – Alignment device
Reexamination Certificate
2006-11-28
2006-11-28
Bennett, G. Bradley (Department: 2859)
Geometrical instruments
Straight-line light ray type
Alignment device
C033S642000, C033SDIG021
Reexamination Certificate
active
07140118
ABSTRACT:
A precise center and edge finder in which the position of the center or edge of a workpiece is directly located with respect to a work tool, such as a milling machine having a spindle driven chuck. The finder has a housing with a shank at one end for attachment to the chuck and a discharge aperture at the other end for discharging a beam of light toward the center or edge of the workpiece. Disposed within the housing is a source of light, preferably a laser diode module, and batteries to power the light source. The beam of light from the finder projects downward in alignment with the centerline of the spindle to the previously marked center or along the edge of the workpiece. The finder eliminates the need for calculations to find the true edge and the risk of contact damage to the workpiece or precision tool.
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Forest Addy, “Using the Edge Finder”, The Home Shop Machinist, Mar./Apr. 2004, 36-37, vol. 23, No. 2, Village Press, Inc., US.
Forest Addy, “Using the Wiggler for Drilling Accurately Located Holes”, The Home Shop Machinist, Mar./Apr. 2004, 36-37, vol. 23, No. 2, Village Press, Inc., US.
Bennett G. Bradley
Ryan Richard A.
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