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  2. Bell & Howell - Wikipedia

    en.wikipedia.org/wiki/Bell_&_Howell

    Bell and Howell is a United States brand of cameras, lenses, and motion picture machinery. It was originally founded as a company in 1907, and headquartered in Wheeling, Illinois . The company was acquired by Böwe Systec in 2003.

  3. Slide cube projector - Wikipedia

    en.wikipedia.org/wiki/Slide_Cube_projector

    The Slide Cube Projector is a slide projector and system, manufactured and marketed by Bell & Howell, which was introduced in 1970 and marketed through the 1980s.The projector derived its name from its transparent cubical plastic slide storage magazine, approximately 5.5 cm (2.2 in) in each dimension (a bit larger than a standard 135 film slide mount), that held 36 to 44 slides, depending on ...

  4. Heathkit - Wikipedia

    en.wikipedia.org/wiki/Heathkit

    Kits brought the convenience of all parts being supplied together, with the assurance of a predictable finished product; many Heathkit model numbers became well known in the ham radio community. The HW-101 HF transceiver became so ubiquitous that even today the "Hot Water One-Oh-One" can be found in use, or purchased as used equipment at ...

  5. Ellipsoidal reflector spotlight - Wikipedia

    en.wikipedia.org/.../Ellipsoidal_reflector_spotlight

    A Colortran ERS. An Ellipsoidal Reflector from a Leko Source Four ERS. Ellipsoidal reflector spot (abbreviated to ERS, or colloquially ellipsoidal or ellipse) is the name for a type of stage lighting instrument, named for the ellipsoidal reflector used to collect and direct the light through a barrel that contains a lens or lens train.

  6. Bell and Howell - Wikipedia

    en.wikipedia.org/?title=Bell_and_Howell&redirect=no

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Bell_and_Howell&oldid=437030451"

  7. Schematic - Wikipedia

    en.wikipedia.org/wiki/Schematic

    A semi-schematic diagram combines some of the abstraction of a purely schematic diagram with other elements displayed as realistically as possible, for various reasons. It is a compromise between a purely abstract diagram (e.g. the schematic of the Washington Metro) and an exclusively realistic representation (e.g. the corresponding aerial view of Washington).

  8. Spotlight (theatre lighting) - Wikipedia

    en.wikipedia.org/wiki/Spotlight_(theatre_lighting)

    Spotlights are sometimes located overhead on catwalks. In some theatres, they may also be located in the control booth or purpose-built "spot booths" in addition to the catwalk. Spotlights may be arranged in a variety of patterns for coverage. For example, they can be located to the back or rear of a theater and aimed at the stage in front of them.

  9. File:Bell & Howell logo 2010s.svg - Wikipedia

    en.wikipedia.org/wiki/File:Bell_&_Howell_logo...

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