All Slide Cube projectors are compatible with any of the four available lenses. Lens look will depend on age, with the earliest lenses that includes silver-coloured finishes on the focusing (and zoom) ring, coordinating with the earliest Slide Cube projectors; lenses initially offered with the Slide Cube System II may be marked as Lumina II. Mannequin numbers are as written on the nameplate, or stamped on the bottom of the projector. The fashions which take CBA lamps even have the mannequin quantity stamped within the metal lamp shield door. Authentic Slide Cube projectors, c. 1970-1973, characteristic a silver ring across the projection lens mounting barrel and are completed in black plastic or woodgrain vinyl panels; lids are opaque woodgrain vinyl. Slide Cube transitional projectors, c. 1974-1976, characteristic the projector model name on the entrance, a broad, coloured ring around the projection lens mounting barrel, relying on if the lens tilts (chrome) or not (black), and are completed in woodgrain vinyl panels; lids are opaque woodgrain vinyl or black acrylic. Slide Cube II projectors, c. 1977-1982, characteristic a black ring with a coloured stripe around the projection lens mounting barrel matching the color of the mannequin on the entrance nameplate and are completed in woodgrain vinyl panels; lids are translucent black acrylic. Murphy, Burt (February 1973). "Slide projectors get smarter all the time". Widespread Mechanics. April 1970. p. Grimes, William R. (December 1990). "Letters: Projector's Lament".

The Slide Cube Projector is a slide projector and system, manufactured and marketed by Bell & Howell, which was introduced in 1970 and marketed via the 1980s. The projector derived its title from its transparent cubical plastic slide storage journal, roughly 5.5 cm (2.2 in) in every dimension (a bit larger than an ordinary 135 movie slide mount), that held 36 to forty four slides, relying on the mount thickness. The magazine used a sliding lid to carry the slides in place. In contrast to competing methods which used straight tray or carousel magazines, the slides in a Slide Cube are stacked on prime of one another moderately than saved in separate slots. The system consisted of Slide Cubes and a projector designed to use them. When a cube is positioned on the slide Mini projector specifications within the PRE-LOAD position, then slid into the LOAD place, its lid opens. As the advance trigger is activated, a sequence is initiated which starts by dropping a single slide into the slide advance mechanism, which uses a circular turntable with slide-measurement holes.

The turntable is thinner than a single slide, which permits only one slide at a time to drop from the cube into the LOAD place. The PREVIEW position allows the operator to examine if the slide is loaded correctly earlier than advancing into the PROJECTION position, the place the picture is projected onto the display screen for viewing by the viewers. The subsequent position, RETURN, is obtainable so the turntable may be reversed, allowing a slide in RETURN place to maneuver again to PROJECTION, which gives the Mini projector for classroom presentations the aptitude to manually reverse the show by a single slide. After the RETURN position, the turntable finally rotates to the (RE)LOAD place, the place the slide drops out of the turntable into a stack and one other slide is taken from the cube. After the slides have been viewed, the operator presses a lever which lifts the slides again into the cube. A lot of the projectors use a 300 watt a hundred and twenty V multifaceted reflector halogen lamp (ANSI code ELH) as a mild source; early models use a 500 W lamp with out reflector (code CBA) as a substitute.

Along with the on-projector controls, it might optionally be operated by a wired distant control, or the "Time Cube" computerized development accessory. The projector - visit link - had an built-in handle, plastic lid or non-compulsory lid which included additional cube storage. A sliding entrance foot or tilting lens adjustment have been used to alter the elevation of the projected image. Several different projection lenses were offered. Bell & Howell Slide Cubes were cheaper than trays and supplied denser and cheaper storage capacity, with a book or drawer of 16 forty-slide cubes (640 slides) occupying the identical house as a single round tray holding at most 140 slides. Stack storage and preview facilitated enhancing of slideshows; slides could possibly be added to or faraway from the present without having to move all the remaining slides to fill the gap. Some tray-based mostly projectors (e.g. some Kodak spherical-tray and Hähnel straight-tray slide projectors) also could use stack loaders to view a stack of slides, but didn't allow addition or elimination of slides, and did not have an related storage system.