Found these in a park today

[Quick draw mcgraw]

Can anyone guess what these are ?says patented in 1923

 

[Mud Hut]

Looks like some sort of track roller .. they appear to be about the right width for interior doors.

 

[deepsecrets]

Vintage pipe roller hanger perhaps?

 

[Mud Hut]

Given their small size, my guess is probably a rod served as the track, but certainly the same concept.

 

[Breezie]

It's could be a drapery hanger with roller. The pic below is a 1923 patent drawing for a curtain/drapery hanger.
Interesting find
Breezie

 

[deepsecrets]

I'm going with Breezie on this one - think it's a match!

 

[Quick draw mcgraw]

Seems right.I found these in a park.maybe Punch and Judy show.