3M 905 Overhead Projector Model 900 AJA 120V 360W Lamp UL Listed USA

3M 905 Overhead Projector Model 900 AJA 120V 360W Lamp UL Listed USA

The 3M 905 is a tabletop overhead projector from 3M's Visual Systems Division, designed to project transparent acetate slides and transparencies onto a wall or projection screen. It uses a transmissive optical system — a high-output tungsten lamp below the stage illuminates transparencies placed on the fresnel lens platen, and the angled mirror head above redirects the image forward onto a surface. The folding projection arm allows the head to be repositioned for focus and image size adjustment.

Specifications & What's Included

• Manufacturer: 3M Visual Systems Division, Austin, TX — Made in USA
• Model: 905 / Model Number: 900 AJA
• Input Power: 120V AC, 60Hz, 4.5A
• Lamp: 360W, 82V (separate lamp type)
• MFG Code: K4
• Certifications: UL Listed (File 316N), CSA
• Form factor: Tabletop/portable with folding projection arm
• Large fresnel lens stage with glass platen for transparency placement
• Angled mirror/lens projection head on adjustable arm
• Front-mounted power switch (red rocker)
• Ventilation grille on right side panel
• Projector only — no transparencies or accessories included

Applications

The 3M 900/905 series overhead projector was a staple of classroom instruction, corporate training rooms, and conference presentations from the 1970s through the 1990s. These projectors were designed to display hand-drawn or photocopied transparencies — acetate sheets — on a large screen, making them the primary visual presentation tool of that era before digital projectors and PowerPoint became standard. The 3M Visual Systems Division was one of the dominant suppliers of overhead projection equipment to schools and businesses in North America during this period. Today, these projectors are still used in some schools, community organizations, and churches that maintain older AV setups, and they are sought by collectors and vintage AV enthusiasts. They are also practical for artists and crafters who use them to trace and enlarge images.