Westinghouse Electric Corporation

Alexander Zwillich

Stephen S Ciccotelli

Carl R Merola

Jayant M Patel

Clem W Eberhart

Dennis E Bedel

A circuit breaker switchgear housing device having a stab positioning system whereby a draw-out circuit breaker having separable contacts is contained in the switchgear housing. A stab positioning system is utilized so as to precisely locate stabs so that a circuit breaker having contact clusters which are electrically attached to the circuit breaker contacts make accurate and uniform contact with the stabs. The stabs are generally a rectangular-shaped bar with one of the ends being rounded off. Cut into two sides of the stab and opposing each other are notches. The stab is inserted into a retainer or positioning washer which has a bayonet-type lock opening into which the stab is inserted and rotated 90.degree., thereby prohibiting axial movement of the stab with respect to the washer. A retainer or positioning washer having an opening slightly larger than the stab cross-section is used to rigidly position an inserted stab, prohibiting rotational movement with respect to the opening in the stab. An insulating partition which is rigidly attached to the switchgear housing, facilitates the positioning and attachment of the two positioning washers containing the stab. The positioning washers are separated by a ledge contained in the insulating partition.

Switchgear with stab-positioning system

Isolated phase bus duct includes apparatus for adjustably attaching an insulator to the inner surface of a disconnecting switch enclosure to accommodate positional and angular tolerances. The apparatus includes a base member tangential to the surface of the enclosure having a first circular aperture with angled sidewalls. A first circular positioning plate having an angled outer sidewall is seated in the first aperture and includes a second circular aperture non-concentric with the first plate. The second aperture also includes angled side walls and has mounted therein a second circular positioning plate. The second plate has a third circular aperture therein which has angled sidewalls and is non-concentric with the second plate. Seated in the third aperture is a ball plate adapted to be bolted to an insulator. To attach the insulator to the enclosure, the first and second positioning plates and the ball plate are rotated relative to each other and to the enclosure until the ball plate lines up with the insulator. Bolts are then inserted through the ball plate and tightly fastened into tapped holes in a bracket attached to the insulator, thereby fixedly attaching the insulator to the enclosure.

Adjustable insulator attachment for isolated phase bus switch

Metal clad switchgear apparatus is taught which includes a skeletal arrangement formed from using 'five-fold' channel members with eight unitary corner members. Four type 'A' corner members are utilized and four type 'B' corner members are utilized. The 'A' and 'B' corner members are formed from utilizing three identical gusset members in any one of two alternate dispositions. The formed corners are self-aligning and self-jigging relative to the channels which interlink them.

Switchgear with enclosure

A telescoping isolated phase bus disconnect switch includes a cylindrical outer housing at ground potential, a pair of coaxial fixed inner conductors at high potential, and a telescoping coaxial movable inner conductor bridging the two fixed inner conductors to perform a switching function. The movable inner conductor is supported on insulating means extending through the housing and mounted upon a movable carriage outside of the housing. The carriage is operated by a drive motor and mechanical linkage both located outside of the housing. The mechanical linkage produces a variable mechanical advantage, increasing its mechanical advantage over the movement range of the switch as the required closing force increases.

Isolated phase bus disconnect switch with grounded operating mechanism

Luminaire

A generally planar, access limiting closure plate is provided in an outdoor lighting luminaire to close off the ballast and optical cavity portions of the luminaire from the exposed slip fitter mounting device at the end of the luminaire housing in order to prevent small animal from entering or nesting in the electrified portions of the luminaire.

Fauna guard

A lamp socket mounting and adjusting assembly for an outdoor lighting luminaire in which the lamp socket is secured to an adjustable socket mounting plate which is variably positionable with respect to a socket mounting bracket to vary both the focal point and the focal tilt axis of the lamp. Separate sets of indicia on the socket mounting bracket indicate both the focal axis tilt and the focal point selected for the lamp.

Growing community of inventors

Pittsburgh, PA, United States of America

Alexander Zwillich