Change Gear Chart For 9 Tpi Lead Screw?

So, those are the patents for the Seneca Falls carriage, yours looks like it's seen better days, but it's really close to them. They really only go back together one way that will make sense.
I think there's a set on a well known site that rhymes with flea bay. Otherwise, shave them down a bit, they really only have to engage with the lead screw and not slip...
 
So, those are the patents for the Seneca Falls carriage, yours looks like it's seen better days, but it's really close to them. They really only go back together one way that will make sense.
I think there's a set on a well known site that rhymes with flea bay. Otherwise, shave them down a bit, they really only have to engage with the lead screw and not slip...
Only seen one set on flea bay and was 1"×8tpi unless you seen something different, I really do appreciate it , older stuff is what I love but pain to find information sometimes
 
look for the Seneca Falls catalog #27. At the end it's got part lists with pics. The broken part is called a cross feed tumbler by them, there's one for sale, it's the newer version with a block to keep it from engaging the half nut while feeding. There's a good chance it should fit.
Oh, and a lazy way to check the half nut- squeeze it together on the lead screw by hand and see if it slips. No slip and it means it's doing what it's supposed to. (Yes, there's way more technical ways to check, but that will give an idea if it's totally shot)
 
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