Early Silent Burner Primus No.5

Discussion in 'Stove Forum' started by Dutchmike, Aug 12, 2009.

  1. Dutchmike

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    Hello All, I need your help in determining what is missing on a very early Primus No.5 I picked up recently from a local site in the Netherlands.

    1250109919-Primus_No.5.jpg

    I was curious to see first hand what had looked like a burner I had not seen before.
    I knew it missed a leg, had a slight dent but even so I was disappointed that the whole unit was glass beaded. Also, the outer pump assembly is not original.
    Was the lower priming dish already a pointer, the bottom revealed a maker's mark without a letter and so this stove is likely made prior to 1911.

    1250110286-Primus_No.5_Burner.jpg

    Upon inspection the burner was made up of some parts that do not make sense together.

    1250110446-Primus_No.5_Burnerbasket.jpg

    Under the cap, that merely sat loose on the central vertical riser tube, effectively closing it off, there was the usual internal cup that acts as a baffle, directing hot gas to the peripheral holes. No surprise there.
    But then it gets new to me.
    The rows of flame holes are punched sideways in a ring of strip metal firmly attached perpendicular to the botton of the burner dish. So far this is in line with the build of the most common silent burners we use or know.
    The centre round cap is very much alike the slightly bigger cap I have for my silent burner of the Primus 100; see the picture of both in comparisson. The bigger cap sits perfectly on top of the perforated ring, that is, both have identical diameters, so it has no business there either.

    1250111192-Primus_silent_caps.jpg

    I assume this smaller cap is from that illusive silent burner for the Primus 71 and 96 stoves.
    It measures just over 40,5 mm and is similar in shape as the bigger Model 100 cap.
    It does not connect anywhere with the structures of this burner other than as described. It also allows gas to escape, IF gas could come from out the riser tube.

    Unfortunately I can find no clues in the gallery, with too general a picture of burners that look similar. So who among you has the information?
    Thanks in advance,

    Mike Meijer
     

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  2. Spiritburner

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    Some observation & opinion to keep you going.

    The earliest catalogue for the Swedish models on the site at the moment is from 1903 - that shows the correct burner cap for the 5 with this style burner. There was a smaller burner of this style for the No:4 & 10 - this may be what your cap is from. Looks too thick gauge brass to be from the 96/71 silent adapter. You're also missing the inner cap.

    The spirit cup moved up & down a bit in the first couple decades & I even have a c1910-12 catalogue that has both styles shown on the same 5 models on concurrent pages. I'll need to get the text translated to see if it explains the reason for the 2 styles
     
  3. David Shouksmith

    David Shouksmith Subscriber

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    Further to Ross's post, I'm wondering if you're missing parts 671 and 676 from page 27 of the 1903 catalogue...

    I have a SVEA 14 with the equivalent parts missing - the burner top looks exactly the same as yours, Mike. For either stove, the words "rocking horse droppings" come to mind... :cry:
     
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  4. Spiritburner

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    Yep - you're right David - just me not being as 'helpful' ;) :lol:

    The Primus ones aren't that rare - Svea on the other hand........
     
  5. dspearsy2k United States

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    pg 25 part 133 looks to be same burner, same catalogue.
     
  6. Doc Mark

    Doc Mark SotM Winner Subscriber

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    Hey, David,

    First, what size is that mug of beer you're enjoying in your Avatar? Looks delicious!! :D

    Im going to try and post photos of my own SVEA #14, but may have to play around with resizing them. They fit 640x480, but may be a few "kb" large. I'll work on them, if necessary. Here goes:

    No luck, darn it! OK, I'll play around and see what happens. Talk later, and God Bless!

    Every Good Wish,
    Doc
     
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  7. Spiritburner

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    Doc - if you can get them under 100kb why not post them in the Stove Reference Gallery?

    We only have 2 examples posted.
     
  8. Doc Mark

    Doc Mark SotM Winner Subscriber

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    HI, Ross,

    Thanks. I'll definitely do that, and in fact, have plans to take and post quite a few photos to the reference section, now that things are finally slowing down, a tiny bit, work-wise. The photos I have for the SVEA are not that good, anyway. So, I'll take new ones. I need to figure out a SIMPLE and quick way to make sure that the photos I take are OK right out of the chute, without having to resize every single one of them. So, something new to learn, me thinks. In any case, thanks for asking, and yes, I will most certainly do that as soon as possible. Take care, and God Bless!

    Every Good Wish,
    Doc
     
  9. darlton

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    Looking at a complete one of this model as I type.
    The inner burner ring has a small pin projection on the top at one side, presumably to keep the top of the outer ring steady.

    Sorry no pics.

    Fr Laurence
     
  10. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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  11. Spiritburner

    Spiritburner Admin

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    Interesting stuff. However the Primus was a bit different to the Svea's & the damper for the lipstick burners is a different beast altogether - the burner in the OP has a separate inner cap.
    I'll be interested in seeing the pin projection Darlton mentions - not noticed on mine so will check later.

    For a burner more similar to the old Primus silent check;
    https://classiccampstoves.com/posts/97152
     
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  12. Dutchmike

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    Hello All, thank you for helping me coming to a conclusion on what seems to be amiss on the old No.5 silent burner. Pictures of the Howes & Burley cap, with a small extended lip on its skirt, convince me that such a shaped cap is what should sit on top of the old No.5 burner.
    The shallow cap as illustrated in the 1903 brochure are for a later(?) model burner, and I could very well have an example for the No.4 and No.10 stove. What this cap is supposed to 'cap' is unclear to me, as the illustration does not show it in connection with other items.
    The shape of the H.& B. cap provides all the answers, so I will try and see if such an item will turn up, or can be fabricated.

    However, I still would like to hear what diameter a top cap has on a 71 / 96 silent burner accesory.
    If not near the 40,5 mm I think I will have this particular cap as a spare item..... for which burner?
    Here we go again!

    Cheers,
    Mike
     
  13. Spiritburner

    Spiritburner Admin

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    I merged your Early Silent Burner Primus No.5 II post to this thread.

    A Primus 5 burner cap (with cheap Aldi calipers ;) )

    1250200691-001.jpg

    1250200698-002.jpg
     

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  14. Spiritburner

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    & one of the inner lip dimensions

    1250201301-003.jpg
     

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  15. Dutchmike

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    Hello Ross,

    Those measurements indicate rather exactly the cap I would be looking for! The outer diameter of the silent burner measures 44.45 mm, so such a cap would sit snugly atop as is to be expected.

    However, I have no wish to pursue the completion of this stove and I intend to give it away- minus that small, non-fitting Primus cap - to anybody willing to pay for the postage.

    Even so, I am eager to learn about the age of this cap, or period in which Primus was selling stoves with such burners.
    Also am I curious about what Darlton, in Australia was looking at. I find his "small pin projection on the top at one side" rather cryptic.

    Thank you for wielding those "cheap" calipers, Ross!
     
  16. Wim

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    Hi Mike, if you're looking for a loving caring new home for this stove, then I'm willing and able to help! ;)

    Regards,

    Wim
     
  17. Dutchmike

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    Hello Wim, first come, first serve: it's yours!
    Can you email me with your address?
    Tot horen, Mike
     
  18. Wim

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    PT send!

    Thanks a lot Mike,

    regards,

    Wim
     
  19. Doc Mark

    Doc Mark SotM Winner Subscriber

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    Hi, Dutch Mike,

    Well done, my Friend! You are a sharing and good man! Take care, and God Bless!

    Every Good Wish,
    Doc