Abstract: This invention relates to an improved dual action switch assembly in which each of two pairs of electrical contacts is alternatively locked in open position by a tensioned locking element upon the interaction of a driving mechanism partially positioned within a frame on a slider unit. The switch assembly in a preferred form includes a base, two movable contact arms and two corresponding fixed contact brackets mounted on the base. The contact arms are mounted for pivotal rotation about mounting terminals. A biasing member, as for example a coil spring, is attached to each of the contact arms to provide a resilient force against pivoting opening movement of the contact arms. A tensioned locking element, preferably formed of two bent, over-center, leaf springs, is mounted between the slider unit and the base.