Hi all, Here is my example of the Primus 1005 lamp. This version with a harp and glass globe shade, is designated as Primus 1008 in the catalogues; and mine is marked B, therefore made in 1912. This lamp came to me in extraordinary good condition. Just had to wipe dust off with a cloth and it was ready for lighting. I spend a lot of time and effort though for finding someone who could reproduce the cracked globe shade that came with this lamp. Eventually I found two glass workers that made a batch of this globe, that also suited the Lux DH lamps. Kind of historic moment for me to fetch these globe shades at Bergdala glassworks, probably only miles from where the original had been made, at least 103 years before. As said before a Lux type of burner giving 200 - 300 CP output, depending on how much pressure is applied (according to a 1913 catalogue). A very well built lamp and a good runner. /Conny
Very nice to see Conny. I like the way Primus still kept the same ideas for the frame 20 years later when they made their 'new' frames. A couple of questions about running the lamp. What mantle do you use? I havn't had any success getting a mantle to work with my 1005. What pressure are you running in the flame shot you show? I think my jet must be totally worn out, as it gives too much flame at virtually no pressure. Also, do you have any idea what the jet hole size should be?
Hi Nils, I used a 0,25 mm needle for the jet orifice and it just made it, so I think it might be the same as on the Lux burner. In the image with the unlit mantle I used a E&G wick burner mantle. Too short and a bit too wide. In the lighting try I used a 500 CP soft mantle and put that on a upper ceramic holder from an Aladdin upright gas mantle. It shrank too much and was too slim to pass over the flame spreader but I used only low pressure and it worked okay for a "money shot" anyway. Probably one can use 800 CP soft mantles to fit? The pressure used in the Bunsen image was just above 0,5 kg/cm2, and below that when using the mantle. My experience with the Lux DH burner is also that you only need pretty low pressure to get it going. /Conny
Hi Connie! That is a lovely Lamp indeed! 1912!.. .. Goodness me!!..Well done!.. I am still amazed by the design of all Lamps and looking at yours also by the simplicity of the working parts... ....Do you have to use an external pump to add pressure?.... Also the small elliptical object hovering above the mantle/burner area, I am assuming that is the generator?.. If so then what might it look like in there and how does it mix and work??.. ..Your photos are presented with a lot of care and detail but also the right order for curious Lamp hungry eyes, that is the only reason I am able to ask these questions!.. ...All this is very new to me and will be for some time to come, so all I can do is wonder...and Ask!!!..
PodBros, not Connie! That's a girls name, isn't it? Regarding the vapouriser/generator, you are correct. Primus copied the Lux burner, and you can see how it is constructed in a sectional drawing a bit further down in The liguid fuel transform into vapour in the thicker feeding tube and in the ball (which is oval in the Primus lamps), and then travel along in the thinner tube which end in the jet just below the burner which is a very brilliant and simple device. That's where the mixing take part.
... ..Sorry Conny!.. ... Thankyou Mr. Christer for pulling me up short on that one..You are familiar with some of my foibles?.. .. ...Ah, ingeniously simple when you see it laid out, and the sealed air tube is the masterstroke, ..Hmmm.. ....How much earlier is the Lux design then?
Hi PodBros, The Y-ending is important in Sweden and indicate a male name ! The Lux burner was at least present in lamps in 1902 (seen in a Lux 1902 catalogue). In this [url=http://0flo.com/index.php?threads/8971 you can see it present on a Lux DH lamp of mine. /Conny
Similar thing when someone is called 'David' and people immediately assume your name is 'Dave'. No, if it was Dave, I'd have written Dave...
Lux presented this burner in 1901, so about ten years before Primus tried their first lamp. However, I'm not sure we know exactly when Primus first sold these lamps with their version of the Lux burner. The 1005 lamps Conny and Nils have in here are both dated 1912. But mine doesn't have the date stamp, and since Primus started with the dating of their products in 1911, it's possible that mine and other un-stamped are before this. Regarding your question about an external pump, the answer is yes. They use an external pump. It attach to the un-plugged tube at the filling lid. It's similar to an old Coleman lamp, i.e. the lid has a simple NRV in the form of a loose check ball, and it is sealed "for real" with the air screw once pumped up. A regular bicycle pump works fine:
