Got the Du Charme rotating head wrench at the Spring Auction last Saturday. US Patent: No. 1,293,735 was issued to William S. Du Charme of Cleveland, Ohio on Feb. 11, 1919. Photo shows it and the other rotating head wrenches in my collection. Anybody know of any others?
Du Charme patent is on DATAMP at:
http://www.datamp.org/patents/search/advance.php?pn=1293735&id=25376&set=2
(http://www.datamp.org/patents/search/advance.php?pn=1293735&id=25376&set=2)
(https://scontent-lga3-1.xx.fbcdn.net/v/t1.0-9/13103390_10207657272244707_4591379431348634111_n.jpg?oh=2483a38736e60db3bfcb23b2361a29c9&oe=57B4DE2D)