AUDIO-VISUAL APPARATUS

• Main Authors: KATO S,JA, HOKARI S,JA
• Format: Patent
• Language: English
• Published: 14.08.1973
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS

An audio-visual apparatus simultaneously reproduces a sound magnetically recorded on a teaching material or audio-visual sheet and projects onto a screen a writing or picture printed or otherwise superposed on the sheet. The apparatus includes a magnetic sound reproducer having a record mounting surface adapted to support a audio-visual sheet with its magnetic record surface facing downwardly. A head, including a light source, a projecting lens and a reflector is positioned above the sound reproducing means, and directs light rays, reflected from the upper surface of the audio-visual sheet through the projection lens, to a screen. A Fresnel lens is pivotally mounted for pivoting toward the mounting surface to press against the audio-visual sheet carrying audio and visual recorded information, to maintain the sheet in a predetermined position on the sound reproducer. The audio-visual sheet includes a base formed with holes for correctly positioning the sheet on the support surface, a reflector surface provided on one surface of the base and a magnetic recording surface provided on the other surface of the base. A transparent layer is formed on the reflector surface and may carry the graphic material to be projected.