As I said in the previous post, I've been having a great time looking and reading my way through Janet Finley's book of antique photos, Quilts in Everyday Life.
Last night, I read about something completely new to me, the Davis vertical feed sewing machine. The photo in Finley's book shows a mother and her little daughter sitting at a Davis machine with a 4-patch quilt. Finley dates the photo to 1895-6. It is labeled by a photo studio in Afton, Iowa.
So I poked around this morning to see what I could learn. "Vertical feed" means there are no feed dogs. The fabric is advanced by the action of the needle and presser foot. The Davis machine was patented and came into production around the same time as the early Elias Howe and Singer machines. It's touted as being able to sew cleanly without pre-basting, to sew all sorts of various thickness of fabrics including leather very well, etc. It looks like the company produced machines between 1868 and 1924 or so. They are treadle machines.