Tell us about yourself!
So if the power (electricity) goes out, you just happen to have a gas powered hair dryer for emergencies?
A handy equivalent to your equal divider tool might be a piece of kitchen equipment found in many bakeries for marking cakes for cutting. It has wheels on the ends of 6 (I think) of the marker ends, not sharp, but pointed to a degree. The tool is opened to the desired width, and the wheels are drawn across the frosting to mark it to be cut with a knife. With slight pressure, they could also easily mark a sheet of paper to use as a pattern, and would probably work as a scribe on soft woods. Easy to find on the internet under bakers supplies or tools.