Annotation unit for transparent document on overhead projector - comprises adjustable frame with slideways for transparent panel which can be marked and placed over document

摘要

The unit comprises a frame made from four bars (1 - 4) which surround the projector, and two slideways (8) which are fixed to the frame and enable a flat transparent panel (14) to be moved over the document (17) being projected. The four bars forming the frame have slots (7) in their ends for fixing screws, allowing the frame to be adjusted to suit all types of overhead projector. The two slideways are fixed to one of the bars (4) and adjustably to another (2), so that the two bars can be adjusted to the dimensions of the projector. The transparent panel can be written on or marked with any sort of erasable implement and slid to and fro over the document being projected to draw attention to particular parts of it. ADVANTAGE - More convenient to use.