What is it? Set 265

1502 is a cable clamp bolt for overhead electrical cables it's made of cast brass and used by Linesmen .

1506 Is a Clapboard Gauge. Similar to Patent 354,680:

I've heard most of the names people have offered for the "split-bolt". We always called them "Kearney's" when I was working in the trade (shrug). I guess whatever name stuck with us was related to one's local supply house.

1504 strainer for bottom of suction hose when drafting water out of a creek

1502 used to connect a ground wire to a ground rod off of a electric panel box

I used the earlier patent on the answer page since the date matched the one on the tool, though the gauge on the web site has features from both of the patents.

The rest of the answers except for number 1503, can be seen here:

Rob

I don't know how you solved that one!

The history of the clapboard fascinates me. The Pilgrims brought tools but could not build adequate housing until Indians showed them how. The colonists began calling weather boards "clapboards". That kind of construction was almost unknown in England. Poor New Englanders used wood sheathing without clapboards. It wasn't weatherproof and houses didn't last long.

A century earlier, Verrazzano had loved his stay with Indians on the Narragansett bay. Among other things, he loved their gentility, the quality of their housing and boats, and the efficiency of their manufacturing.

On Cape Cod, Pilgrims were impressed to find a fort built like a European fort and ropes and nets manufactured like English ones. They mentioned boards. I had thought clapboards had always been sawed, but that didn't come about until 1780 or so. Before that, they were split and shaved.

Indians in New England had board beds large enough for several adults. They were known for large, comfortable dome houses made of poles covered with mats. This construction allowed them to take their "siding" with them if they spent summers at the shore and winters inland. For permanent structures, I wonder if they used clapboards.

1503 Automobile battery cable remover?