Optimus No. 7 cutaway display, 1930's

Discussion in 'Optimus No:7' started by Staffan Rönn, Jan 2, 2021.

  1. Staffan Rönn

    Staffan Rönn SotM Winner SotY Winner Subscriber

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    This is a cutaway display model of Optimus No. 7 with burner 207 from the 1930's. The number on the tank is in the cut-out section, but I am assuming it's the same as the No. 7 presented in this catalogue: https://classiccampstoves.com/threads/1934-catalogue-no-1260.31160/

    These cutaway displays are excellent for showing the design and function of stoves. This one has an early generation 207 burner where the cleaning needle is in the upper position when the burner valve is closed. Other time markers include: tank bottom and side embossing indicate "Stockholm" instead of "Upplands Väsby", air screw is marked Stockholm, dimpled spirit cup and old style cookie cutter with tactile lettering.

    20210101_153518.jpg 20210101_153542.jpg 20210101_164558.jpg 20210101_152852.jpg 20210101_152910.jpg 20210101_152943.jpg 20210101_153015.jpg 20210101_153023.jpg 20210101_153124.jpg 20210101_153159.jpg 20210101_143608.jpg
     
  2. Metropolitantrout

    Metropolitantrout SotM Winner Subscriber

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    Well done. Thanks for posting this! Jerry
     
  3. orsoorso

    orsoorso Subscriber

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    just corious, it seems to me that the jet cleaning needle rise up whem the spindle is turned clockvise, to shut off the flow.
    Am I wrong?
     
  4. Staffan Rönn

    Staffan Rönn SotM Winner SotY Winner Subscriber

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    Hi @orsoorso - You are correct. This is how the first generation of regulating burner 207 was designed. I don't know exactly when, but fairly soon the design was changed to clear the jet when the valve is fully open instead of closed.
     
  5. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    From 1939 Optimus Catalogue:

    upload_2021-1-2_17-9-39.jpeg
     
  6. Staffan Rönn

    Staffan Rönn SotM Winner SotY Winner Subscriber

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    And I also have a cutaway sample of a 207 burner of the later design where cleaning needle is retracted when burner valve is closed:

    IMAG7272.jpg
     
  7. Spiritburner

    Spiritburner Admin SotM Winner Subscriber

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    Very informative & great display piece! :thumbup:
     
  8. BradB

    BradB United States Subscriber

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    Thanks. I have an early burner with the needle up when in the closed position. It is on a 1S with the lion paw feet. Beautiful stove! Brad
     
  9. ROBBO55

    ROBBO55 Subscriber

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    Thanks Staffan, a very useful post. :thumbup:
     
  10. z1ulike

    z1ulike United States SotM Winner Subscriber

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    Wow, I didn't know Optimus painted the inside of their stoves red.

    Ben
     
  11. Tony Press

    Tony Press Australia Subscriber

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    Excellent display. :thumbup:

    Cheers

    Tony
     
  12. Staffan Rönn

    Staffan Rönn SotM Winner SotY Winner Subscriber

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    Hi Ben,
    Yes - the red insides are quite intriguing. Maybe you could help us find out if this was the case also on other models from around the same era? What about cutting the tank and burner open of this one French Optimus 9 (not Halmia) and post photos for all of us to see here? :twisted::twisted::twisted:
    ;)