Abstract: A switching AC voltage regulator including a transformer, two solid state AC switches, and sensing means controlling the switches to produce the desired output voltage. The two switches conduct alternately and are switched at a rate much higher than the frequency of the regulated AC voltage. When the first switch is activated, the transformer is shorted out, causing the output of the transformer to equal the input. When the second switch is activated, normal transformer action occurs, creating an output voltage either higher or lower than the input, depending on the transformer arrangement. The duty cycle of the switches is varied to provide precise control of the output voltage.

Abstract: A snap-together segmented fanning strip that simplifies grouping of wires or spreads out the wires in a cable of a machine tool or the like for distribution to channel-mounted terminal blocks of a terminal strip to complete a series of electrical circuits. The segmented fanning strip includes a plurality of fanning blocks which incorporate a snap fit between the blocks rather than a tongue-in-groove or a keyed connection to arrange the fanning blocks in a row in a side-by-side abutting relation. To assemble the blocks in a segmented fanning strip, the top front edge of one block interfits into the channel at the top outer edge of the other block so that they are side by side and then the blocks are pressed together to snap the bottom edge of the one block into the upwardly facing channel in the bottom edge of the other block to establish the connection between the blocks.

Abstract: A magnetic latch for a clapper type contactor having an electromechanical system comprising an operating coil, a coil core, a magnet frame, and an armature includes a magnetic latch plate. The magnetic latch plate includes a stop portion having a pair of ears mounted on a pivoted contact arm. The stop portion of the latch abuts against the magnet frame before energization of the coil so that a flux path includes the core, the magnet frame, the magnetic latch, the armature and the air gap between the armature and core of the coil.

Abstract: A high voltage motor starter enclosure includes a floor mounted vertical section consisting of three starter cells, stacked one on top of the other, each cell being suitable to mount one full voltage, non-reversing, squirrel cage starter having a contactor of the air break type.