These Planes have a flexible steel face which may be adjusted by turning the knob, to plane the arc of the required circle, either convex or concave. The graduated scale on the side serves as a gauge, which enables the user to set the Plane accurately.Can be accurately set to plane the arc of the same circle, both concave and convex, by turning the Knob.
Patent Side Adjustment for exact adjusting of the Cutter with the face of the Plane.
(Quote from https://www.datamp.org/) Patented in 1862, and quite successful in the marketplace, the Evans patent was certainly the first commercially viable metallic compass plane. Roger Smith observes in his first book that Stanley may have purchased...
Sargent V.B.M. Adjustable Iron Planes.
Patented February 3, 1891.
Circular Planes.Graduated Scale.
These Planes have a flexible steel face which may be adjusted by turning the knob, to plane the arc of the required circle, either convex or...
Stanley #113 circular plane
You can see more on circular planes here
I believe this is a type 1/2 based on this site, http://www.oldtooluser.com/typestudy/stanno113cptypestudy.htm
A circular plane is a woodworking plane with flexible face adjustable ...
Stanley #13 circular plane (MY #13-181817-3)Stanley #13 Circular plane, 10 1/2"L, 1 3/4"W, 3lbs, 1871-1909.You can see more on circular planes here
This is Leonard Bailey's design for a circular plane. It has a flexible steel sole which can be made...
I'd like to thank an email with further and better information.
Note this early and rare plane has it's sole made from a single piece with no hinge. PTAMPIA (page 27) also has an image and information on this plane as well as John Walters guide....
Stanley #20 circular plane
Stanley #20 Victor circular plane, 9 1/2"L (10"L 1912 on), 1 3/4"W, 4lbs, 1880-1958.
Excerpt from supertool.com:
“This plane, and the #20 1/2, are by far the best circular planes ever designed. The design continues to this d...