I've been kindly given a table lamp but the exact model is unclear. The base is Nagel Chase but the top looks like a later addition, possibly from an early Coleman. This is what it looks like as I recieved it...
* Update * After an initial clean, this is where I've got to... The bolt/nut that held the shade holder in place sheared off when i tried to unscrew it. This will have to be drilled out and the remains extrcted. You can now see the word 'close' and an arrow stamped into the fibre control nob. Unfortunately the ball bearing in the non return valve has disintegrated. Im not sure what to do about this yet. The corrosion is gone but a lot of the nickel plating is extremely patchy. The remains of the paint on the handle has been removed, ready for filling and repainting. The generator came out easily although the jam nut has been chewed up at some point. The burner is looking good and still has its mesh in place. The date on the burner and the manufacturers identification 'ring' both read 1919 although I'm not sure if this can be relied on or not.
Hello Colin, the first link shows what your lamp would have looked like originally and the burner system which is fitted to your lamp is a Coleman burner system, the second link shows one of those lamps which has been converted to take a Tilley burner system. 1922 - 1932 Nagel Chase model 10 https://classicpressurelamps.com/threads/nagel-chase-tilley-hybrid-table-lamp.13905/
Thanks Jeff, having trawled through the Reference Gallery I guessed as much. Assuming I can get it to work I'll finish refurbishing it and leave it as it is.
Hello Colin, a filler cap/pressure valve from a Coleman CQ., and other Colemans of that era will fit your lamp and the link below shows another NC., lamp which could have been your lamp. 1920 - 1921 Nagel Chase Model 2
I suspected one might but it's good to know! Thanks. Interestingly, having been fiddling with taps & dies in preparation to producing a spreadsheet of lamp threads, I discovered the the Nagel Chase filler thread is the same as the Tilley control valve to tank thread - 246A and onward - maybe... it could be either BSCY 1/2" x 26tpi (Tilley) or BSF 1/2" x 26tpi. The only difference is the thread angle of either 60deg or 55deg. They're so similar they are almost interchangeable.
Yes, my old mate Les mentioned that some of the threads on pressure lamps were the same as old BSCY threads.
The ball in the filler/inlet is a 1/8" steel and can be replaced. With a suitable rod through the inlet end of the air hole drift out the old ball and after cleaning the brass pop a new SS ball in there and tap over the crimps. This is one of those jobs that looks difficult but is actually a very simple 10 minute fettle. ::Neil::
Early US lamps are often found with these Q70 burners adapted as Coleman was offering the conversation. A smart move in my opinion as I believe these Q70 burners are what put Coleman on top of the competition. For what it's worth the Coleman filler caps are a 1/2-27 thread. Same as their air/burner tubes also.
So the lamp might be kind of original, or at least it shows a moment in lantern history. I have a CQ fount and was tempted to use the burner on that but maybe its best to leave it on the Nagel Chase. 1/2" x 27 tpi. That's so close to BSCY and BSB! Thanks for the info, it will me extremely useful!
From my own (limited) experience, 26tpi will screw in/on 27tpi about 1/4" / 6mm before they jam and the thread starts to distort.
1/2"-27tpi would be a UNS(Unified Special thread). 60° angle on the threads, as with both the US Standards and the Metric. UNS taps and dies aren't very commonly available but they are still standard sizes. All BS and Whitworth ones would have 55° angle on the threads.
Yes, I missed out on that, Colin. 60° is pretty odd for BS. BSC / BSCY was developed after being adopted from CEI (Cycle Engineers Institute) thread.
That would make a complete Coleman and I will definitely keep the NC anyway so I'm probably going to do just that! Thanks again Francisco.
