What is it?

[cambria09]

Howdy All. Found this a few days ago at a site that was supposed to be an old rail depot from FL East Coast RR built c1913. I think it might be be some sort of power or phone line tensioner...probably not real old?? Thanks for the view and HHTA. C9

 

[NOLA_Ken]

It's called a "hot line clamp" It's for connecting power lines.

MacLean Power Systems - Conductor Hardware - Clamps - Hot Line