Is the brass thingy a jet? I can’t see a hole but then I’m half blind! 1 cm long. The hex nut intrigues me, it has Patent Applied For stamped on it. 2 cm across. Thanks if you can help.
I'm not sure what the nut on the left is but it looks like some form of locking nut arrangement? The brass thing-a-me-bobs are jets obviously but without knowing the exact size I wouldn't know what they're for. They look like Petromax jets but all jets look like Petromax jets if you can't guage the scale.
@Jean J If they’re Petromax jets they’ll have it stamped on them. Other than that, it’s hard to be sure. The nut is intriguing as you say. That circle of raised ’pips’ puts me in mind of those encircling a carbide lamp’s water drip control to prevent the control slipping out of adjustment. It could be for that application, at a pinch, or a similar function on an adjustable valve of some other sort. John
You could be on the right lines John and Colin. Both came in a lot of spares from an old shop that repaired bikes, primus stoves and pressure lamps. So the jet could be for a stove or lamp (no name on it) and the hex nut for a carbide lamp.
The profile of the two jets is similar to that of Primus jets but they are usually marked with the part number on one facet of the hexagonal and 'SWEDEN' on another.
Well I refer to those brass objects as nipples. The hole in them is the jet. That's how I sees it anyway and it seems clear enough to me...
The Jets may be gas jets, some cooker burners etc use jets of this type, measuring the threads would narrow that down some 7mm are petromax size, 5/16" (8 mmish) or 1/8" B.s.p. (9.7mm) are jets more likely to be gas. The orifice size together with your thread size shall let you identify these better. RxR
The jets used on gas cookers - and indeed on most other gas appliances - usually have a flat top, whereas the jets in question are somewhat conical.
@Henry Plews I agree, most jets I've seen are flat topped, having said that I have seen dome topped jets on one or two LPG cookers.
Ah, fair enough, I wasn't aware of that. The jets for use with LPG that came with our new gas cooker have the same profile as the jets for natural gas it's just the orifices that are different.
My cooker came with two sets of jets, both natural gas and lpg (lpg here). Both sets were flat topped. A previous cooker had domed jets, I have no idea why they differ!
The jet (nipple, nozzle, etc) doesn't appear to belong on the "bicycle" lamp for sure... (Did I just have another brain fart and miss the point here?) apology in advance. Gee, it's great when you get old, you can explain your stupidy by the number of years you've been around!
