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  2. Simon Willard - Wikipedia

    en.wikipedia.org/wiki/Simon_Willard

    Additionally, he oversaw Harvard's management of its clocks. Willard presented two clocks to Harvard. One was a tall-case clock; the other was a wall-mounted regulator clock that was installed in a room near University Hall. A particular incident relates to Harvard's Great Orrery which was malfunctioning. Many craftsmen had unsuccessfully ...

  3. Musical clock - Wikipedia

    en.wikipedia.org/wiki/Musical_clock

    A musical clock is a clock that marks the hours of the day with a musical tune. They can be considered elaborate versions of striking or chiming clocks. [1] Elaborate large-scale musical clocks with automatons are often installed in public places and are widespread in Japan. Unlike conventional electronic musical clocks, these clocks plays pre ...

  4. Neon sign - Wikipedia

    en.wikipedia.org/wiki/Neon_sign

    The signs – dubbed "liquid fire" – were visible in daylight; people would stop and stare. [21] What may be the oldest surviving neon sign in the United States, still in use for its original purpose, is the sign "Theatre" (1929) at the Lake Worth Playhouse in Lake Worth Beach, Florida.

  5. Clockwork - Wikipedia

    en.wikipedia.org/wiki/Clockwork

    Keys of various sizes for winding up mainsprings on clocks Mechanism of a Wall Clock, Ansonia Co. 1904. The stored amounts of energy used by a given piece during its operation is often housed within it; this frequently happens via a winding device that applies mechanical stress to an energy-storage mechanism such as a mainspring, thus involving some form of escapement.

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  7. LED display - Wikipedia

    en.wikipedia.org/wiki/LED_display

    Detail view of an LED display with a matrix of red, green and blue diodes The 1,500-foot (460 m) long LED display on the Fremont Street Experience in Downtown Las Vegas, Nevada, is currently the largest in the world. A LED display is a flat panel display that uses an array of light-emitting diodes (LEDs) as pixels for a video display.