Replacement Screw Cap plans for 60-70's lamp upload

[Duane K]

Hello all, first time here.

I have an old lamp that was my grandma's and I'm a little sentimental about it.  It must be early 70's minimum because I remember it as a child.  I'm sure you all can probably identify it and that might help what I'm trying to do here.  A few years ago the cap cracked, it got cloudy and didn't work good anymore.  I'm in the process of trying to restore it, using the lava formula I found here.  I was about to say goodbye to it because I could not find a replacement cap.  Then I realized I could 3D scan the old cap, use that to build it in CAD, and have a replacement 3D printed!  So the cap should be back from the printer soon and hopefully it fits and the re-lava goes well.  I want to share the file used for the 3D print, it took about 10 hours and some pretty expensive equipment/software to reverse engineer.  The cap only cost $13 to print once I made the file.  I do want to make sure my replacement fits before I upload it.  I will also try to give updates on my overall success with the restore.  Here is a picture of the lamp so maybe someone can identify it.  Hard to tell in picture but it is gold-ish in color, and the cap screws onto the glass threads with an o-ring seal.

Buy it here https://www.shapeways.com/product/4TJ6AR66D/lava-cap-for-70-s-quot-...

[Duane K]

You were with support at the beginning @Claude J  It's great to see you found a good original color also.  I'm not around often, but I'll be around again!

[Claude J]

thumbs up

[Freeman Lowell]

First post here. Just wanted to say I got my replacement cap today and it fits perfectly (without the o-ring). Do you know if the o-ring is critical for creating a seal (I do have the o-ring but it seems to create a gap at the top)? I’m going to start a separate thread for other questions I have but wanted to make sure to say Thank you so much for doing this!!!

[Arne]

I dont feel like going through 63 replies now but in case it hasnt been said yet 1. for some filaments like abs its common to do a final finish with acetone vapor. It'll melt the surface and close tiny gaps resulting in a glossy finish. 2. I think vintage Crestworth Astro bottles used an identical cap, you might want to add this to your description once somebody confirms this. If no one knows I can check tomorrow.

[Arne]

Yes it is. Used a bottle without the rubber ring and as soon as you tilt it enough liquid runs out.

Freeman Lowell said:

First post here. Just wanted to say I got my replacement cap today and it fits perfectly (without the o-ring). Do you know if the o-ring is critical for creating a seal (I do have the o-ring but it seems to create a gap at the top)? I’m going to start a separate thread for other questions I have but wanted to make sure to say Thank you so much for doing this!!!

[Freeman Lowell]

Thanks. I realized after I posted this that the replacement cap came with an o-ring already installed so I was doubling up and hence the gap :)

Arne said:

Yes it is. Used a bottle without the rubber ring and as soon as you tilt it enough liquid runs out.

[Jsmooth]

I bought one of these caps and it works perfectly! Thanks a bunch!!!

[BSP016]

Mine just came in today, and it's a perfect fit for my copper 2-piece Century! My old O-ring fit perfectly. I am so thrilled that this is a viable replacement that is available for everyone, thank you so much for creating this file. Planning on painting mine a soft coppery color to match the base.