This is interesting in that the insulator company is both Akron High Potential of Barberton, Ohio; and it is Akron Hi-Potential of Barberton, Ohio. I've seen the difference references but not in one document. They are always High Potential or Hi-Potential, not High-Potential and Hi Potential, except in this pic from here. Not sure why.
BTW, SunRunner: I went along the foundation outside but cannot dig it: Immediately it touches Cole's bakery's driveway of gravel and is full of fallen bricks. On the inside foundation, though, I dug the 1860s penny seen here.