Abstract: A push-pull switch employs a coil spring contained in an internal chamber in a housing and surrounding a reduced central portion on a stem passing through the chamber. The spring is interposed between a pair of washers slidably receiving the central portion of the stem for urging the washers apart and into engagement with the opposite ends of the chamber. Each washer abuts a shoulder on the stem where the reduced portion thereof joins the remainder of the stem so that axial movement of the stem in either direction sufficient to bridge either of two pairs of contacts, imparts displacement to one or the other of the washers and hence to the spring. The stem is biased by a single spring into a central position at which both pairs of contacts are open.

Abstract: A magnetizing current switch particularly adaptable for use in gas insulated substations comprising a sealed housing including two spaced-apart electrical conductors and a movable contact for electrically connecting or disconnecting the electrical conductors. A rotatable drive shaft is coupled to drive means, which translate the rotation of the drive shaft to a generally straight-line motion, and the straight-line motion moves an insulating rod which is secured to the contact, thereby positioning the contact either in contact with both conductors, or spaced apart from at least one of them. The drive means includes a pair of support members and a pair of spaced-apart pivot links pivotally coupled to the support members. One of the pivot links is coupled to the drive shaft, and a link connector couples the pivot links together.

Abstract: Presented is a switch structure having high current carrying capacity over a broad range of frequencies from DC to 50 megacycles, constructed to be air operated so as to eliminate the need for an external actuator. The switch includes an airactuated piston which reciprocates between open and closed positions of the switch, and which also constitutes the movable contact element of the switch.