Is the broken piece metal? If so, and you decide to glue it you might want to try JB Weld.
http://jbweld.net/products/jbweld.php
The link takes you to the company website for a description. I know you will want to know as much as possible before squirting anything on your Featherweight!
JB Weld works great on many metal parts that are heaily used. You can buy it at any hardware store.