US Patent 7273296 Back-to-back lampholder

A lampholder assembly in which lampholders are supported on a bracket in a back-to-back configuration with no gap therebetween is formed of a pair of insulative lampholders, each having a generally planar back surface and an opposite front face including a lamp receiving opening. One lampholder includes a set of two resilient latching pawls extending generally orthogonally from and to either side of the back surface thereof and the other lampholder includes a set of two rigid bosses extending from laterally opposite sides thereof. A lampholder mounting bracket receives the bosses and latching pawls to rigidly support the lampholders in back-to-back contact with one another.