I have one in my collection and have sold a few on past Wrenching News Auctions. the last was Doug Busch's Auction in 1910. Lot 646 in photo.
(http://i222.photobucket.com/albums/dd3/buswrench/busch-2010/busch-646-653.jpg)
Patent is on DATAMP at:
http://www.datamp.org/patents/displayPatent.php?number=1442083&typeCode=0 (http://www.datamp.org/patents/displayPatent.php?number=1442083&typeCode=0)