Quick Change
"BUR Quick Change Set" - The “BUR Quick Change” was a barbell with slotted ends. Quick Change weights were U-shaped and slotted - not round - and had hooks attached to them. These hooks allowed for the quick and easy loading and unloading of weight plates. The BUR Quick Change was patented in 1930 and first offered for sale in 1938 for $60 ($930 in 2010 dollars).