I have a "Driver Line" jig saw that has been in the family since new. It has a 10.5" tilting bed and a multi-speed driver sheave. Like most tools of that era it is "all cast iron". It has been in storage for seven years (during a move). I am now putting it back in service. I saw the patent on a web site the other day; it is an interesting design with the adjustments that were built in.
Bob Warfel
bob.warfel@gmail.com