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Old 13-03-18, 04:27 PM   #471
martinpaff
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In my ongoing quest to find "collectables" (junk!) in the various places it has been hidden, I came across this. I've had it for some time, waiting to be cleaned up...




I'm sure you can read what it is. There isn't a great deal about them on the web, or the manufacturer. Ringrose delivered a lecture on flammable gases in 1921, and in 1927 this detector was cleared for use in all mines and sewers - there is an item in the April 1928 The Engineer magazine.

It works by absorbing methane through the vents and burning it off within a porous tube, using a battery heated element. The pressure differential operates the bellows and switches on the red lamp. Below the critical concentration the difference is not enough to make the switch contacts.

Unfortunately, despite being beautifully packed, the couriers managed to smash the glass - I'm waiting for a bit of acrylic to arrive to replace it.

MP
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Old 13-03-18, 06:02 PM   #472
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That looks interesting, what diameter is the glass you need ?

Neil.
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Old 13-03-18, 06:12 PM   #473
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82mm, or just a little less. I have a short length of 80mm tube on its way.

MP
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Old 13-03-18, 06:41 PM   #474
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Quote:
Originally Posted by martinpaff View Post
this detector was cleared for use in all mines and sewers -

It works by absorbing methane through the vents and burning it off within a porous tube, using a battery heated element. The pressure differential operates the bellows and switches on the red lamp. Below the critical concentration the difference is not enough to make the switch contacts.


MP
I'm assuming restored for use as a warning lamp in your trailer whilst camping at rallies after a diet of pickled eggs and Charnwood Best Bitter?



Dan
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Old 13-03-18, 07:16 PM   #475
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Quote:
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82mm, or just a little less. I have a short length of 80mm tube on its way.

MP
Bigger than it looks then.
I have a couple of pyrex tubes from candle lanterns but nothing that big.

Neil.
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Old 13-03-18, 07:18 PM   #476
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All you need now is one of these.

https://en.wikipedia.org/wiki/Sewer_gas_destructor_lamp

Some more images.

http://www.amusingplanet.com/2016/12...-lamps-of.html

Last edited by ListerHA2; 13-03-18 at 07:21 PM.
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Old 13-03-18, 08:21 PM   #477
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Quote:
Originally Posted by danthetangye View Post
I'm assuming restored for use as a warning lamp in your trailer whilst camping at rallies after a diet of pickled eggs and Charnwood Best Bitter?



Dan
I just spat cider all over the keyboard lol
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Old 18-03-18, 11:35 AM   #478
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Thank you for the much-needed humour!!!

The sewer gas lamp is now finished; a piece of 80mm acrylic and a couple of cork gaskets did the job nicely.

Another small project that has been hanging around for years is this Jensen steamer...


When I bought it there was no base, just the metal components. I have copied the baseboard from the internet, and made it as authentic as I can.


In typical American stylee, it is not small! The "little" Wilesco D10 is there for comparison.

This is an early Jensen model 25; the riveted boiler makes it about 1939 to '43. What might be less apparent is the quality; unlike the Wilesco (and Mamod, etc, etc.) it is beautifully made from machined and plated components. The base plate and flywheel are both cast iron. The engine would have originally been electrically heated, but I don't have the heating element.

Another piece of junk for the shed!

MP
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Old 18-03-18, 01:01 PM   #479
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Just shown this to Mrs Windrush and she is amazed that there is somebody who actually collects even more (and I quote) "useless rammell" than me! However I don't think it was an invitation for me to go ahead and to try and outdo you though so your crown is safe enough....for now!

Pete.
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Old 18-03-18, 01:27 PM   #480
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Very nice Martin, there is an identical Sewer lamp in the basement of Brede pumping station.

Phill.
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