Creative Woodworks & crafts 2005-04, страница 71

This is ihe secret of the Barnes drive system that was patented in 1870. The system allows the wheel to travel in both directions, but the drive is applied only on the down stroke, Harries used tills for most of their foot-powered machinery.

continued on page 72 Creative Woodworks a Crafts April 2005 • 71

This is the second model of ihe Barnes No. 7. Notice the one on the right has a spring return mechanism, whereas the one on the left has a tapered oak board for a return spring. I think the saw with the oak board spring was an earlier model, before coil springs were widely used in machinery. Two models were manufactured around 1875. and both were relatively easy to operate due to the unique mechanical advantage of their design.

Here's a pair of Fleetwood scroll saws that were made in the late 1800s. The top part of hotb saws is about the same, but as you can see, the bottoms are quite different. The saw with the very ornate hottom would have been more expensive, and some have conjectured that this model was made with the hope of attracting more women to the fine art of scroll sawing.

Demas also made a similar saw in 1881 and it operates on the same design principle as the Champion.

Here is a Champion foot-powered lathe/saw combination that was also made in the late 1800s. i he scroll saw is bolted to the bed of the lathe and the faceplate on the lathe has an offset hole into which the drive link arm would be screwed, That way the offset hole in the faceplate becomes an eccentric that moves the saw arms up and down.