Hi, this is my recently acquired No 70. I got it partly because I'd never seen such a simple device before and partly because it was so corroded, I thought it'd be a good demonstrator for electrolysis cleaning. It was £31 on ebay, but also came with 2 blowlamps, so maybe you could say £10. Does anyone know roughly what date it would be and more importantly, does anyone have any tips for unblocking the jet? I've tried heat and strands of wire, but no luck. I've cleaned quite a few blowlamps now with using electrolysis pretty successfully, especially in terms of effort. I use bicarbonate of soda, steel sacrificial electrodes and about 35 V and 2-4 A for about 2 hours. I then rub it with a stainless scourer and then use Silvo wadding. If people are interested I'll share more detail The tiny stove didn't sink like the blow lamps, so there's a bit that's not been cleaned, but it's a nice reminder of how bad it was. The flame diffuser, chain and cap are missing and the threads on the bell are so worn it just slots on. The meths dish was quite bent, but when i gently tried pushing it back to shape a bit fell off. The brass is so thin and worn, I think this stove has had a hard life. If anyone has any more info to share or point to regarding the no 70, I'd be interested to read it. Phill
@Phill Jackson For cleaning the jet in the nipple, you will need a fine pricker, about 0.2 mm (the jet should be 0.23 mm). Heat to very dull red, cool, prick, repeat. I wonder if the problem with the piece falling off your spirit dish was a result of zinc leaching from the thin brass during electrolysis? (Assuming it was brass, not steel - also the reason I avoid polish with ammonia on thin brass). Cheers Tony
sorry all, Phill, link i posted failed. operator error i expect. my bad i didnt check it. c.1926 -to- 1930,31 <-- there, that worked.
