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A spinner rack is a rotating merchandise display, usually placed on a retailer's floor or counter. Often used to display magazines , paperbacks , [ 1 ] greeting cards , postcards , hats , or seeds , the spinner rack is closely associated with the comic book industry .
A close-up view of a sheet of pegboard. Perforated hardboard is tempered hardboard which is pre-drilled with evenly spaced holes. The holes are used to accept pegs or hooks to support various items, and perforated hardboards are therefore used for purposes such as tool boards in workshops.
The game board on the Nickelodeon game show Make the Grade was a 7x7 split-flap display, used to display subjects and wild cards, as well as tracking contestants' progress. The television game show Chain Reaction on Game Show Network features computer-simulated split-flap displays to display the various words in a chain. [citation needed]
Multiple segment alphanumeric displays are nearly as old as the use of electricity. A 1908 textbook [5] describes an alphanumeric display system using incandescent lamps and a mechanical switching arrangement. Each of 21 lamps was connected to a switch operated by a set of slotted bars, installed in a rotating drum.
A display board, also known as poster board, is a board-shaped material that is rigid and strong enough to stand on its own, and generally used paper or other materials affixed to it. Along with quad charts , display boards were an early form of fast communication developed by the National Weather Service of the United States Department of ...
The models are mounted on a rotating base and the light flashes on and off within an extremely small fraction of a second as each successive model passes the same spot. The stroboscopic effect makes each seem to be a single animated object. By allowing the rotation speed to be slightly out of synchronization with the strobe, the animated ...
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