Microfilm viewer having enlarged copy production attachment

Claim 1

A table-top microfilm viewer and separate attachment device for producing enlarged copies of the microfilm, said viewer including a cabinet containing a light means, a microfilm holding device, a projection lens, means for deflecting a light beam issuing from said lens, and a projection screen onto which the light beam is deflected for viewing the transillumination; said light means and said projection lens being so disposed that an optical axis common to said light means and to said projection lens lies at an angle of between 10° and 30° to a horizontal plan; said deflecting means comprising a single surface first mirror mounted a predetermined spacing from said screen within said cabinet and lying in a substantially vertical plane for deflecting the light beam onto said projection screen; said cabinet having removable means for forming an opening therein below the area between said screen and said first mirror, and said cabinet being formed so as to provide an undercut portion below said opening and above a tabletop; a separate attachment device for producing enlarged copies of the microfilm removably positionable in said undercut portion, said device comprising a housing, means connected to said housing supporting a single surface second mirror, a horizonally disposed platform means in said housing, means for positioning a light-sensitive material on said platform means, and said support means for said second mirror being pivotable so as to position said second mirror through said opening in said cabinet and into said area between said first mirror and said screen so as to deflect the light beam from said first mirror onto said platform to illuminate said light-sensitive material.