Spring curve marker

[Philip Davies]

Sources for this idea came from “Fine Woodworking” contributed by Floyd Lien and from Robert Wearing’s book, “Woodwork Aids & Devices”.
The spring is in its 3rd incarnation. It was cut from a logging saw to make a spring return for my hydraulic press, hence the notches. The chain is that sort which is used in bathrooms. It is strong enough to hold a reasonable tension, but if I wanted to form a sine curve with it, I would need something stronger. This makes it adjustable. If I wanted to repeat the curve, I would just mark the ball where it is inserted in the notch at the end.

[DIYer]

Thanks Philip Davies! We've added your Spring Curve Marker to our Measuring and Marking category,
as well as to your builder page: Philip Davies's Homemade Tools. Your receipt:

Spring Curve Marker by Philip Davies

tags: marking, spring

[bilbo88]

Really cool idea. I'm forever struggling to find round objects with massive radii to draw around, so this will solve that problem nicely 😝 Thanks!