(I hope this is appropriate to post here)
A friend of mine asked me if I knew what this was and my only guess is that it might be used to sharpen or true circular saw blades. On the back side of the head it reads “Speed Corp. ” “Portland ORE.” and the letters “PAT.” The only other markings are shown in the second picture. I was not able to find any listing for Speed Corp in Portland on the NET
The head is stationary while the center feature and the file holder are adjustable. The head has a tapered hub with a locking wingnut above it. The file can be move to accomodate a 7 inch radius and the file itself has an thumbscrew for fine adjustment to the blade. If this is for sharpening saw blades it looks like the blade must be spun against the fixed file.
Has anyone seen one of these and can you tell me what the moveable center feature is? There is a cursor line on the inner wheel of that center feature and it appears as if there is some eccentricity to the wheel but it is not very pronounced. I’m not sure this is a complete tool and if it is not, please let me know what parts are missing. I’m not trying to “restore” it but its mystery is annoying me.
Thanks in advance,
Marc (I am aware of the website “What is This?” but I thought I would try Lumberjocks first)
-- Windsurfing, Woodworking, Weaving, and Woodducks. "Most woodworkers are usually boring holes"