Inner glass/ mantle protector identification please.

Discussion in 'Open Forum' started by Anthony, Dec 2, 2019.

  1. Anthony

    Anthony Australia Subscriber

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    IMG_2858.JPG

    The light globe shaped ones I'm sure I have seen before but I do not remember what they are.

    Anyone recognise anything in the picture ??
     
  2. Tony Press

    Tony Press Australia Subscriber

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    Town gas lights?

    Cheers

    Tony
     
  3. Graham P Australia

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    Straight sided may be for piped acetylene (carbide) systems,
    (just a vague memory)
     
  4. hillcrosslanes

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    Possibly globes for the Nernst type solid ceramic filament electric lights. They worked at open atmospheric pressure. Many of the globes in your picture look exactly like them. The Nernst lamps had a solid ceramic filament of rare earth oxides like in a mesh gas mantle but an electric current was passed through it instead of a flame to make it glow.
     
  5. hillcrosslanes

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    Nernst lamps had a preheater element or automatic carbon coater that burnt away to get them up conducting temp of the main ceramic element. They had a negative resistance coefficient so, they became more conductive the hotter they got thus, requiring a ballast mechanism.
     
  6. Anthony

    Anthony Australia Subscriber

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    Brilliant.
    Thanks. I'll look into it.
     
  7. WimVe

    WimVe Subscriber

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    (Inner) gas light or as the germans say "Knagenglas".
    In you case the Knagen or three points are made from a metal band. With the bulb shape > gaslight
    The Graetzin spiritus lights also use these more straight ones as a inner globe more straight.

    Hytta still sells them:

    [​IMG]
     

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