Featured Unusual antique casters

Hi, I was wondering if anyone out there has ever seen this unusual type of furniture caster. I just purchased an all original platform rocker that’s been in the same family since new. I noticed that the base was loose and in need of re-gluing, so I proceeded to disassemble it. That’s when I discovered the interesting casters it has! It took me a bit to finally discover how to remove them: they are threaded in. But once removed, I realized just how odd they are: I’ve never seen anything like them before, but May someone out there has. Each wood wheel is attached to a cast iron swivel, which is enclosed by separating halves that, once joined, are threaded. They thread snugly into the bottom of the leg, and have flat spots so they can be tightened with a wrench! No marking except “PAT’D” as well as the number 4 on each swivel. If anyone is familiar with these and can help date them, I’d be grateful.

 

Here are some better pictures!

 

Anyone have any information on these?

 

I have a chair from about 1875 with casters like those. That's all I know about them.

 

I'm a dummy...but haven't seen a rocker with casters before.
I have 4 cast-iron split sleeves, but don't have casters for them; mine are without T-flanges, an' do not have the interior retaining rings to prevent caster removal without sleeve removal. They are unmarked; 2 3/4" long, 5/;8" OD, 7/16" bore, 2 1/2" interior length. Pics on demand...Good Luck!

 

Thanks for the replies, I do appreciate it! They are definitely unusual; a lot of time and engineering went into making them, so I figure the rocker must have been a higher end piece of furniture.

 

like to see the whole rocker........!

 

I currently have it apart, as the base was too loose but as soon as I get it together I’ll definitely post some pictures!

 

More of a roller than a rocker? Or a rock 'n roller?

 

I have an appreciation for your droll humor, AJ...Thanks!