What do I have here?

[sjhark]

Hi all,
I'm new to the Barn and would like some help identifying a feature of my car. I have a 1931 Deluxe Roadster that has a pair of uprights bolted to the front and back bumpers. I haven't been able to find out anything about them, other than they've been on the car for a long time.
When I was a kid, back in the 70s, there was an old lady who lived on our block that had this car for her daily driver. It was hand re-painted at some time, and in the 80s my dad overhauled the motor for her, along with other maintenance work. When she passed away in the early 90s, her family offered my dad first dibs on the car, and he bought it. I recently bought the car from him, and have begun the process of fixing it up.
Can anyone provide info on the bumpers, please? Thank you for any help!