Replacing the celluloid lens in a prewar Delta Torpedo light.

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cyclingday

I'm the Wiz, and nobody beats me!
The original celluloid lenses in these Delta Torpedo lights, were shot, so I wanted to replace them with new ones.
The method used to originally secure the lenses were with miniature split rivets through the chrome lens bezel.
I couldn’t find any split rivets small enough to match the originals, so I made some out of brass nails/brads.
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Here’s the size nail I started with.
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Then, I cut it to length and then split it with an Xacto Razor Saw.
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I know!
Crazy, but I was able to do it fairly easily.
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It helps to have jewelers magnifying glasses.
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Once I had the miniature split rivets made, I just pierced the celluloid lens with them and then peened over the tabs, to secure the lens in the bezel.
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They came out pretty close to what the original rivets looked like, with no modifications to the original equipment.
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So, that way, the lenses can be continually replaced as need be in the future.
If anybody has a line on the original type split rivets that Delta used back in the 1930’s, I’m definitely interested.
It’s nice to have the lenses secured as originally intended, but as far as I know, no one has ever devised a way to do so.
This method was about all I could think of, considering my options.
Hopefully, you’ll find it helpful.
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cyclingday

I'm the Wiz, and nobody beats me!
Are any of those as small as the ones needed to exact match what Delta used to secure the lenses?
The smallest sizes I saw, were about twice the size that is needed.
The shaft needs to be about 1/16” with a head size no bigger than 1/8”
They really need to be an exact match to what was originally used.
It would be unsightly, if you used too big of a rivet in this location.
 
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WillWork4Parts

Finally riding a big boys bike
The smaller head size will be the hardest to find...I don't think I have a prewar light to get exact dimensions off of though. https://www.ebay.com/itm/224534619202?campid=5335809022
Hansen Rivets was who I ordered from in the past. Granger(Zoro) has a pretty nice selection as well as Beryl. Nickel plated steel seems to be the way to go, but I've noticed some prewar lights used Aluminum as well. Then brass for some of the internal contacts. Stainless looks great, but I had issue with cutting those to size and when they're too long the stainless work hardens and takes off sideways way quicker than mild steel. There's all kinds of options still out there, you just need to know dimensions of what you're looking for and where to look.
 
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