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  2. Artcraft Fluorescent Lighting Corporation - Wikipedia

    en.wikipedia.org/wiki/Artcraft_Fluorescent...

    Artcraft Fluorescent Lighting Corporation [2] was an American mass manufacturer of fluorescent lighting fixtures from the time of the public introduction of the fluorescent lamp at the 1939 World's Fair. Artcraft was first to announce and start mass manufacturing of a liner showcase striplight fixture and slimline ballast in 1946. [3] [4]

  3. Fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Fluorescent_lamp

    Electromagnetic ballasts may also cause problems for video recording as there can be a so-called beat effect between the video frame rate and the fluctuations in intensity of the fluorescent lamp. Fluorescent lamps with electronic ballasts do not flicker, since above about 5 kHz, the excited electron state half-life is longer than a half cycle ...

  4. EN 207 - Wikipedia

    en.wikipedia.org/wiki/EN_207

    EN 207 is a European norm for laser safety eyewear (now superseded, together with the EN 208, by the ISO 19818:2021 standard [1]). Any laser eye protection sold within the European Community must be certified and labeled with the CE mark. According to this standard, laser safety glasses should not only absorb laser light of a given wavelength ...

  5. Fire door - Wikipedia

    en.wikipedia.org/wiki/Fire_door

    Fire-resistance rated door, with wire mesh glass vision panel Industrial grade fire door rated to hydrocarbon curve and blast resistance Double fire door immediately after 3-hour fire test inside a 4-hour rated Durasteel wall Double fire door after 3-hour fire test in a 4-hour Durasteel wall, during successful 45PSI (3.1 bar) hose stream test leading to a UL Listing [1]

  6. Newcomb-Macklin Company - Wikipedia

    en.wikipedia.org/wiki/Newcomb-Macklin_Company

    Newcomb-Macklin picture frames were distinguished by their unique, perpendicular corner splines, a construction feature that prevented the corners of a frame from separating over time. [6] Basswood was the company's preferred wood for hand-carving, eventually giving way to poplar as the domestic supply of basswood dwindled in the 1960s.

  7. Artcraft (typeface) - Wikipedia

    en.wikipedia.org/wiki/Artcraft_(typeface)

    Artcraft is an Old Style typeface engraved in 1912 by Robert Wiebking for Wiebking, Hardinge & Company which ran the Advance Type Foundry. It was originally called Craftsman, then Art-Craft, before finally becoming Artcraft. After Advance was sold to the Western Type Foundry in 1914, Wiebking added Artcraft Bold and Artcraft Italic.

  8. Framing (visual arts) - Wikipedia

    en.wikipedia.org/wiki/Framing_(visual_arts)

    Framing: trees focus on the church of Weissenbach an der Triesting, Austria A framing view of the Uetersen Rosarium.. In visual arts and particularly cinematography, framing is the presentation of visual elements in an image, especially the placement of the subject in relation to other objects.

  9. Lois Weber - Wikipedia

    en.wikipedia.org/wiki/Lois_Weber

    Florence Lois Weber was born on June 13, 1879, [24] [25] [26] in Allegheny City, Pennsylvania, [27] the second of three children of Mary Matilda Snaman [28] [29] [30] and George Weber, [31] an upholster and decorator [32] who had spent several years in missionary street work. [33]

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