Dolt Step On hanger - Hooked - From Wally Vegors - 1/4" bolt hole - The "V" stamped on the bolt hanger is from Wally Vegors. When Wally gave me his bolting kit, I asked him about the hook on the hangers and he said that is the way he originally purchased them. He did not modify the hangers.
Dolt Step On hanger - Hooked - 1/4" bolt hole - I luckily found another Dolt Hooked hanger in a ebay auction, and the cut out to make the hook is exactly the same as the ones on Wally's Dolt hangers.
Dolt - Novel D bolt hanger - Patent filed 5/1967 - The hanger in the museum was donated by Don Lauria, and I have yet to see a second one. So not sure if this hanger was ever put in production.
In the patent drawings - Figure 7 shows the machined aluminum Dolthanger.
FIGURE 7 is a perspective view of a bolt hanger provided with an aperture having the novel D configuration of this invention, and showing in dotted outline a bolt for anchoring the hanger to a supporting formation.
FIGURE 7. In FIGURE 7, the numeral 26 designates a bolt hanger having two generally perpendicular flanges 27, 28. An aperture 14 having the previously described D configuration is positioned in one flange 27 preferably by locating the straight or leading edge 16 of the aperture at the juncture of the flange 27 and of the trailing or rear face 29 of the other or abutting flange 28. A second aperture 30 is located in the abutting flange 28 and is sized to receive a bolt 31 (shown in dotted outline). The bolt 31 may have other configurations in addition to that shown in FIGURE 7. The bolt 31 is driven into a supporting formation until the abutting flange 28 is firmly pressed against the supporting formation. The operation of a bolt hanger in other respects is the same as the previously described operation of a piton.