Eaton Corporation

Westinghouse Electric Corporation

Keith Lynn Mayhood

Paul Richard Rakus

Todd Matthew Lathrop

Perry Robert Gibson

Ronald Dale Hartzel

Trent A Chontas

William David Munsch

John J McGettigan

Vincent M Iacono

Walter B Vogel

Glen Charles Sisson

John R Kimmich

Richard Edwin White

John Joseph Kurtz

The contact fingers of electrical switching apparatus have radial convex surfaces centered on the pivot pins which seat on concave surfaces in the molded contact carrier to transmit bending loads on the pin into the carrier. A seal member which snaps onto the end of the pivot pin has fins which extend between the contact fingers to block flow of arcing gases through the carrier. For lower current ratings, some of the contact fingers are replaced by annular spacers which also transmit bending moments into the carrier and restrict gas flow. A stop ledge on the carrier against which the contact springs bias the contact fingers has a recess which allows the center fingers to project farther toward the stationary contacts so that the arc toes on these fingers are the last to separate on opening and the arc is concentrated on them. The drive pin connecting the carrier to the operating mechanism has flats which key it for engagement in a slot in the carrier for installation and removal only with the carrier pivots lifted out of their bearing pockets by removal of the rear casing.

Electrical switching apparatus with improved contact arm carrier

A molded case circuit breaker or switch having the LOAD and/or LINE terminals thereof protected by a multifunctional terminal shield arrangement which also provides interphase barriers for the aforementioned terminals and associated wiring. The barrier also provides wire channels for lower voltage supplemental wiring.

Circuit interrupter with terminal shield and wire trough

A molded case circuit breaker is provided with ground fault protection by a modular unit which drops into a pole compartment in the molded casing in place of a pole assembly. The modular unit includes a housing forming an open faced cavity across which is mounted a printed circuit board with the ground fault circuit components and trip solenoid projecting into the cavity. The housing also supports the ground fault sensing toroid in a position for the appropriate conductors to pass through the coil. A bell switch and auxiliary switch are positioned by the housing for actuation by levers mounted on the cradle pin and crossbar, respectively. An integral leaf spring molded into the housing accommodates for manufacturing tolerances and fixes the positions of the various components.

Molded case circuit breaker with ground fault protection and signaling

A compact coupling reaming apparatus and method for reaming coupling bolt holes of a rotor coupling. The apparatus includes a fixture plate for mounting the apparatus to the face of the coupling via a plurality of the coupling bolt holes. The apparatus also includes a drill axially slidably, radially slidably, and axially rotatably mounted to the fixture plate. During the reaming process, the drill is first aligned with the center of a first coupling bolt hole, the drill having a fixed distance from an axis of the rotor after being aligned with the center of the first coupling bolt hole. After reaming the first coupling bolt hole, the drill is aligned with a center of the holes and all other coupling bolt holes to be reamed by axially rotating the drill to the center of the second coupling bolt hole while maintaining the fixed distance of the drill from the axis of the rotor.

Coupling reaming apparatus and method

Growing community of inventors

Pittsburgh, PA, United States of America

Keith Lynn Mayhood