Acetylene Lighting - Burner threads?

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Hooli
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Re: Acetylene Lighting - Burner threads?

Unread post by Hooli » Wed Jun 03, 2009 9:36 am

DAM wrote:
Hooli wrote:i bet the lights are still brighter than a 6v bantam :lol:
Or a wrecked Triumph :)
lights work fine actually :D
Classics ain't built in Metric

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FastFrank
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Re: Acetylene Lighting - Burner threads?

Unread post by FastFrank » Wed Jun 03, 2009 10:18 am

If iver tha does owt for nowt alus duit for thissen!

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Justin Faithfull
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Re: Acetylene Lighting - Burner threads?

Unread post by Justin Faithfull » Wed Jun 03, 2009 1:28 pm

VMCC - Now that is a good idea :D
Elephants! Where?

The Mighty Gusset

Re: Acetylene Lighting - Burner threads?

Unread post by The Mighty Gusset » Wed Jun 03, 2009 5:49 pm

That link of Frank's looks like it might be helpful.
Perhaps an email to them might be in order ?

I confess to being slightly baffled.
A thread with a taper like that is only going to work over about 1/4 to 1/2 turn surely ?

Presumably there was a reason why it was done that way, but what ?

And HOW ?
Cutting threads on a taper like that must be a Right Bugger !

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Justin Faithfull
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Re: Acetylene Lighting - Burner threads?

Unread post by Justin Faithfull » Wed Jun 03, 2009 11:51 pm

These tapered threads seem to be reasonably common on motor cycle carbide lamps. Although some burners are a parallel thread which I am pretty sure is BSP.
I can only assume this course taper is to help seal the burner to lamp connection from leaking gas. I have had access to quite a few front & rear lamps & burners & I am not entirely sure if there was much standardisation across different manufacturers.
Thanks for that link Frank, I checked it out but had no joy there. Perhaps sending them an e-mail is worth a try, I'll do that next & let you all know how I am getting on.
Exciting isn't it. :ugeek: :geek: :ugeek: :geek: :ugeek:
Elephants! Where?

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Greenbat
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Re: Acetylene Lighting - Burner threads?

Unread post by Greenbat » Thu Jun 04, 2009 12:27 am

The taper will help seal the thread, to keep the gas where it belongs. Taper thread should be pretty easy to cut, you just need a taper attachment on your lathe (I think offset tailstock wouldn't work on such a small length!). Probably be easier to turn than a parallel thread, you can run off into fresh air. Nowadays, you'd run it on CNC lathe, G76 complex thread cycle. If I could get to a suitable machine I'd run you a few off :)

The Mighty Gusset

Re: Acetylene Lighting - Burner threads?

Unread post by The Mighty Gusset » Thu Jun 04, 2009 11:21 am

Justin Faithfull wrote: Exciting isn't it. :ugeek: :geek: :ugeek: :geek: :ugeek:
Strangely - yes !

Them funny folks over in that weird foreign country called History don't have have some strange practices.

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jessplop
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Re: Acetylene Lighting - Burner threads?

Unread post by jessplop » Thu Jun 04, 2009 2:00 pm

There I go, thinking "I'll just pop into the 'pre war' section, 'cos I hardly ever have a look in" and what's the first thread (sic) that I read? I must say that taper thread does look familiar, but can't say where from though, good luck JF.

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jessplop
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Re: Acetylene Lighting - Burner threads?

Unread post by jessplop » Thu Jun 04, 2009 2:13 pm

Ah, now I know why it looks so familiar, it has a similar form to drill pipe connections, although obviously somewhat smaller in diameter.

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Greenbat
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Re: Acetylene Lighting - Burner threads?

Unread post by Greenbat » Thu Jun 04, 2009 2:26 pm

Jess, are those pipes like that to seal or for another reason? I suppose if it still being used, it must work.

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