Abstract: A rotary program switch is disclosed including a housing supporting a commutator for rotation. The commutator includes a plurality of axially spaced contact tracks, and a corresponding plurality of brush elements are supported in the housing for engagement with the tracks in response to rotation of the commutator. Certain of the brushes are mounted on a rotatable gear for selectively positioning the brushes relative to the housing from outside the housing, and the latter brushes are adjustably mounted on the gear. Others of the brushes are carried by a support arm reversibly mountable within the housing to selectively position the brushes in generally diametrically opposed locations in the housing. The support arm, in either position, is adjustable relative to the housing. The several adjustments enable performance of a desired switching program in response to rotation of the commutator in opposite directions relative to the housing.