Foldable transparency enlarger for overhead projector
AssigneeBuhl Industries, Inc.
InventorHenry Kyhl
Life of this patent
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Abstract
A device for supporting a transparency on a top surface of an overhead projector is foldable from a compact unit into a structure having a planar base with an indentation for receiving a transparency and legs which are pivotally mounted on the base and rest on the top of an overhead projector to position the transparency at a specific spacing therefrom. Other pivotal elements position a lens at a given distance above the base so that light from the overhead projector will pass through the transparency and project it on a remote screen without white light showing around the sides of the transparency.
Claims7
A device for supporting a transparency on a top surface of an overhead projector, the device comprising:
- a planar base having means for receiving a transparency;
- leg means mounted on the base for pivotal movement from a storage position to a support position wherein the leg means supports the base parallel to and spaced a predetermined distance from the top surface of an overhead projector;
- lens holding means pivotally mounted on the base and having a planar lens holding member movable from a storage position to a working position wherein the lens holding member is parallel to and spaced from the base in alignment with the transparency receiving means;
- whereby the device is foldable into a desired working configuration and is collapsible into a compact structure for storage.
Dependencies are inferred from the claim text.