A reader from St. Louis identified and sent me the patent for the two bracket like items shown top, right Lot CB093 in the Burkey Auction Catalog.
http://www.wrenchingnews.com/burkey-auction-2012/catalog.html (http://www.wrenchingnews.com/burkey-auction-2012/catalog.html)
They were patented as Vehicle Bow Top Holders by Clarence Blair of St. Joseph, Michigan on July 22, 1919 and assigned to Auto Specialties Mfg. Co. of San Francisco, Calif.
http://www.google.com/patents?id=FKROAAAAEBAJ&pg=PA1&dq=1,310,519&source=gbs_selected_pages&cad=2#v=onepage&q=1%2C310%2C519&f=false (http://www.google.com/patents?id=FKROAAAAEBAJ&pg=PA1&dq=1,310,519&source=gbs_selected_pages&cad=2#v=onepage&q=1%2C310%2C519&f=false)
(http://i222.photobucket.com/albums/dd3/buswrench/burkey-2012/burkey-CB090-93.jpg)