Hi Jim and others,  I restored one of these a few years ago and
I had to replace both the drum and the triangle.  Here are some
pictures I took at the time.  Good luck!

Craig Smith

 [
 [ http://www.mmdigest.com/Attachments/16/06/07/160607_182122_S%20Drum%20and%20triangle%20Mechanism%20installed.jpg
 
 [
 [ http://www.mmdigest.com/Attachments/16/06/07/160607_182122_S%20Drum%20Beater.jpg
 
 [
 [ http://www.mmdigest.com/Attachments/16/06/07/160607_182122_S%20Mount%20for%20drum%20beaters.jpg
 
 [
 [ http://www.mmdigest.com/Attachments/16/06/07/160607_182122_Triangle%20Mechanism%20installed%20top%20view.jpg