(moved from "non axial" for correct terminology)
A radial ERS fixture has the lamp enter the reflector housing along a radius of the ellipse as opposed to an axial fixture where the lamp enters the reflector on axis of the ellipse. The radial fixture was a long time standard, though the reflector is less efficient than an axial reflector. The most popular radial ERS was probably the
Altman Cat#360-6x9, pictured below.
Radial ERS fixtures are also occasionally called "top loaders" due to the positioning of the lamp cap.
