I believe that these all are no longer covered by copyright and that there are no problems with distributing them. Many were scanned by Google, none were scanned by me. By far Disston had the most surviving documents that were scanned and turned into PDF files. I have not ``cleaned up'' the file names as this is the way that the files are named when I found them. Much of the data in these documents is about circular saws, band saws and carpenter's saws.
I never trust files that are found on other's computers, I recommend that anyone that wants to rely on the contents of any of these PDFs that you do an internet search after cutting the name from the following lists and then putting the name into the search bar of your favourite browser. I originally copied these from many sources and have since forgotten where I found many of them. I have had several of them for over ten (10) years now and some of the source repositories have "disappeared". On the other hand some of the places that you end up with when looking for these PDFs are quite unexpected and interesting.
When in doubt always try the "Internet Archive". They have an incredible number of PDF file of just about anything. Sometimes they have multiple copies of the same document and one may be "better" than the others.
Several times when I found a copy on the first search page, there were additional copies on following items and pages, there as well as brand new and different related PDFs.
Most of these will appear on the first page of a Google search. Some are behind "pay walls" and I consider these to be "not found".