I can't remember where I found out about this Web site, but I have found it very interesting. If it was shared here on this site, pardon the duplicate posting.
Here is a quote from their homepage that explains their goal.
"This ongoing project is an effort to scan craft pattern publications that are in the public domain, to preserve them, so we can keep our craft heritages in our hands. Most of these scans have been graphically edited to make the images easier for craft workers to see, and to reduce file sizes. They are available, for free, to anyone who wants them, for educational, personal, artistic and other creative uses."
Check it out at