| 摘要 |
<p>1,244,776. Overhead projection apparatus. J. S. WRIGHT. July 22, 1969 [July 29, 1968], No.36699/69. Headings G2A and G2C. A transparency storage and display device for an overhead projector comprises an auxiliary stage 16 to which is hinged a frame 14 supporting a pack of transparencies 12 secured to the frame by a ring binder 18, register pins 32 being provided on stage 16 to accurately locate the transparencies for projection. Detent 40, 42 releasably holds frame 14 against stage 16, and a cover with tab 54 encloses the pack 12 for storage. In use, the pack 12 rests over front edge 28 of frame 14, the transparency for projection resting over pins 32. Frame 14 is raised to allow that transparency to swing beneath edge 28 away from stage 16.</p> |
