Interesting. I always took ⭘ to be an open circuit and ⏽ to be a closed circuit, using the symbol for a switch as the rough guide. Perhaps they're poor symbols

Interesting. I always took ⭘ to be an open circuit and ⏽ to be a closed circuit, using the symbol for a switch as the rough guide. Perhaps they're poor symbols if people can look at them and come up with rational reasons for each interpretation to be correct.