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Image projecting device

  • US 5,477,283 A
  • Filed: 08/15/1994
  • Issued: 12/19/1995
  • Est. Priority Date: 05/24/1993
  • Status: Expired due to Fees
First Claim
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1. A device for projecting guide lines on a work surface, the device including (1) a projecting apparatus, (2) an apparatus base adapted to be attached to a table, wall or ceiling, (3) a connecting arm, (4) means for pivotally attaching one end of the connecting arm to the apparatus base, (5) means for swivelly connecting the other end of the connecting arm to the projecting apparatus, the pivotal means permitting the projecting unit to be moved vertically and horizontally relative to the base, the swivel means permitting the projecting apparatus to be rotated, the projecting apparatus (1) including (a) a housing, (b) a light source within the housing, (c) a transparent panel spaced therefrom so that light passes therethrough, and (d) a focusing lens carried by the housing so that the lens is between the transparent panel and the work surface, a retainer adapted to hold the transparent panel, means for rotating the transparent panel so that lines can be projected on the work surface at any angle, the transparent panel having on its surface a set of lines to be projected on the work surface, the lines being a set of nonparallel lines configured to correct for lens aberrations so that the lines are projected on the work surface as parallel guide lines.

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