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Post by onotoman on May 21, 2011 8:04:04 GMT -5
Well, I'm off to Turkey for 2 weeks today, but this morning my latest Type 6 was delivered and boy is this a project lamp. Not saying I'm not looking forward to going on holiday, but looking forward to getting stuck into this one too. Looks like it has some history - look at that Bonnet! Anyway, it'll have to wait until I return - but I did manage to spray some WD40 on it so it can steep in it for 2 weeks. The gauzes have gone and it looks like I'll need some striker parts. My first thoughts are to try to knock some of the dints out of the bonnet but to leave some for 'historic value' :-)     |
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inbye
Shotfirer.
Posts: 114
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Post by inbye on May 21, 2011 9:05:53 GMT -5
You'll be able to get some of the distorsion out, but it'll never be perfect. I once watched how they do this, on one of a number of visits to the Protector works.
They knock out all of the rivets securing the crown & nameplate. The body of the bonnet is then pushed over a solid steel "dolly", the same shape as a good bonnet. A few light blows with a soft mallet & it's all ready to rivet back together. Bonnets in far worse shape than yours were made to look almost as good as new.
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Post by onotoman on Jun 28, 2011 13:41:06 GMT -5
Hi Guys, Just getting to the final stages of restoration of the Protector Type 6 in the pics above. The most serious dints in the bonnet have been knocked out and I've renewed the magnetic lock (the other was solid) and most of the part of the self-lighter mechanism. It's looking good - but well-used which adds to the attraction for me. The plate is stamped with I 94 which if it was from my native north east could have been 'Isabella Pit' - but the lamp could have come from anywhere in the UK as I bought it on Ebay. Anyway, at the base of the bonnet there is a ring with a little lever and O (Open) and S (Shut) on the outer side that opens and shuts a series of holes at the base of the bonnet (beneath and to the outside of the Gauzes). Does anyone know the purpose of this 'valve' as it doesn't seem to make much difference to the flame if open or shut? Also, most Type 6 lamps don't have this feature - was this a particular model, I wonder? This Protector has the same 'Air Shut Off': www.dmm-gallery.org.uk/gallery/0002-066.htm |
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Post by John on Jun 28, 2011 14:33:24 GMT -5
I'll refer you to the "New Mine Gasses" booklet on my web site, better than trying to explain anything, there are some good illustrations of the "probe lamp" coalcollieryandmining.110mb.com/NMGF.htmlThere are two training booklets I posted on that site, the original booklet we used at Tech in the 60's and a more modern updated booklet I titled "New Mine Gasses Booklet" which was the last one the NCB published. |
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Post by shropshirebloke on Jun 28, 2011 18:12:47 GMT -5
The "shut off ring" you describe was fitted to non-probe or sample injecting lamps.
For normal testing of the main body of air the ring was left in the open position, allowing more efficient combustion as incoming fresh air wasn't affected by combustion products rising through the bonnet.
With the ring in the closed position the air being sampled had to enter near the top of the bonnet, allowing testing for thin layers of gas immediately below the roof.
Obviously later lamps using bulbs or probes no longer needed this facility, as samples could be obtained remotely from the lamp itself.
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