My buddy, and regular reader, Sammy sent me this patent filed by George Bundy in 1940 for what eventually became the Selmer adjustable ligature. I have seen these called Magna-tone, Adjusta-tone or Expando ligatures. I've played on of these on my tenor for several years now and they are great. Joe Lovano also uses one. The cool thing about the lig is that it can be adjusted to work on clarinet, alto saxophone and tenor saxophone, and probably bari sax as well. At one point these rare ligs were selling on eBay for $100 or more. Now, like about everything else, the prices have come down a bit, to more like $40. I like them because they help with a quicker response without adding too much high end. If you are reed obsessive like I am you can also change reeds very quickly. The patent has expired and there is a guy in Italy making replicas of these now. You can buy them in several different types of materials.