We are big fans of the 1868 treatise on everything mechanical called “507 mechanical movements” by Henry T. Brown. I recently discovered that there is a fantastic site which has been lovingly animating the illustrations in the 1908 edition of the book to actually show what the movements look like in motion! It is far from complete, and it looks like painstakingly detailed work, but you can see all of the original illustrations, and pick at a glance which ones have animations: they are the ones in color.
For example, to see a beautiful animation of the Scotch Yoke depicted above, click here. (Also, don't miss the ordinary crank.) This will definitely be a useful resource for us as we delve deeper into our exploration of linkages and motion.