Thermidor 1/2 pint wickless picnic stove

Discussion in 'Samuel Heath & Sons' started by Go Scout, Sep 2, 2018.

  1. Go Scout

    Go Scout Subscriber

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    20180902_193845.jpg

    Here's another example of a Thermidor picnic stove. As other owners have mentioned, this stove gets very hot during use and it is worth while only doing the air bleed screw / pressure release valve barely finger tight.

    This particular example arrived without pan supports, so the ones shown were made out of tent pegs that were laying around my workshop (benefits of being the Scout Group QM).

    For those that haven't come across these stoves before, they feature a 2 part 'lipstick' arrangement. Below on the left is the Thermidor lipstick and on the right is an example from a Monitor Touring Stove ...

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    The two lipsticks have slightly different threads and are not inter-changeable.

    The travel or reserve cap, unlike the Monitor stove, can be screwed onto a fount mounted holder so that it doesn't get lost and the flame spreader plate is made from cast iron like those on the Primus 96.

    The stove has short fixed legs as opposed to folding legs offered by other manufacturers.

    Jet size appears to be the smaller 0.23mm diameter giving a very intense blue flame initially, but this fades a bit once the stove gets almost too hot to touch.

    20180902_193845.jpg

    Whether this stove was brilliantly designed to get hot and maintain pressure, or whether it gets hot through poor design is debateable, but personally the heat puts me off a little.

    The heat travels down through the metal rather than coming directly from the heat given off through combustion.

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    The nut (bottom right) should be on the left hand side of the picture as its part of the Thermidor. Quite a difference in the size of the spirit cups!

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    The only markings on the fount in this example is the manufacturer ...

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    Full power ...

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    ... and finally, it's storage tin ...

    20180902_173927.jpg

    Go Scout
     
  2. hikerduane

    hikerduane Subscriber

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    Hadn't noticed the lipstick being that way on mine. The bell is stuck, will have to fire it up and twist the bell clockwise to see if I can get it off.
    Duane
     
  3. ROBBO55

    ROBBO55 Subscriber

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    Nice little stove :thumbup:
     
  4. Simes

    Simes Subscriber

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    I have a Monitor Sans lipstick. Have been wondering following recent threads on various replacement options what to do.

    First question would be what was the original thread size? BSP?
     
  5. Tony Press

    Tony Press Australia Subscriber

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    @Go Scout

    Thank you for that detailed exposition.

    Cheers

    Tony