Fitel USA Corporation

Lucent Technologies Inc.

Siemens Industry, Inc.

Siemens Aktiengesellschaft

Mark I Shmukler

Wayne McCall Newton

Carla Green Wilson

James Edward Ferree

Jim Jenqtsong Sheu

Kelly L Johnson

Eugene R Rusiecki

Guang Yang

Solomon R Titus

Terry D Mathis

Montri Viriyayuthakorn

Charles W Jackson

Jorg Sizemore

Jennifer R Meeks

Priya L Tabaddor

Raiden Jay Kim

Huy Nguyen

Parry A Moss

Sheenfar Sean Fong

Donald D Vargasreyes

Slobodan F Fenjac

A solid-state circuit breaker comprises an airgap operating mechanism including components and a housing that houses the components of the airgap operating mechanism such that each component in the operating mechanism is configured to operate in a way that only limited amount of space is required to achieve functions of ON, OFF, and TRIP. The components of the operating mechanism include a contact arm, a handle, and an interface feature to interface between the handle and the contact arm to apply a force thereon. The interface feature is configured to adjust the contact arm ensuring an optimal positioning. The components of the operating mechanism include a double pivot of the contact arm and a handle feature in that the contact arm has two-pivot legs, an armature, an armature pivot feature and a stopper feature, a cradle, and a stopper pin configured to stop the cradle during TRIP operation.

Solid-state circuit breaker includes airgap operating mechanism configured to operate in limited space

Embodiments provide an electrical contact assembly. The electrical contact assembly includes a crossbar, a pivot pin mounted in the crossbar, a contact arm pivotally mounted on the pivot pin and rotatable about a pivot axis, a moveable electrical contact spaced from the pivot axis in a first arm portion of the contact arm, and a spring assembly coupled between the crossbar and the contact arm, the spring assembly including a clevis pin and a spring received on the clevis pin wherein an end of the clevis pin extends through the spring and is received in a pivot recess in the crossbar. Electrical contact assemblies with offset rod ends and limit stops are also disclosed. Systems including the electrical contact assembly and methods of operating the electrical contact assembly are provided, as are other aspects.

Circuit breaker electrical contact assembly, and systems and methods using same

The present invention relates generally to a mechanism of a contact system for circuit breakers. More particularly, the invention encompasses a mechanism for a rotary double-break contact system, which enables a direct transfer of torque from stored energy components, such as, springs, to the contact arm in the ON-position (contacts closed) without using intermediate cam surface. The mechanism described in the invention also ensures reliable locking of the contact arm in the blow-off position using stationary means that are integral with or fixed to a crossbar module. This invention enables to achieve significant reduction or even to eliminate friction at certain critical interfaces between the contact mechanism components, thus, reducing or potentially eliminating hysteresis, and improving performance consistency, and also eliminating mechanism performance dependency on wear level and condition of an intermediate cam surface. An additional feature of this invention is a reduction of a loss of contact torque/force during over-travel in the ON position when the fixed and/or moveable contacts erode. Configurations described in this invention may also feature physical protection for the moving components of the contact mechanism assembly from flying particles resulting from short circuit shots.

Double break disconnect/contact system

An indoor/outdoor dry core fiber optic cable or sub-unit that incorporates a plurality of optical fibers surrounded by a buffer material wound helically or in reverse-oscillated lay about a water blocking central strength member at a first tension and a first lay length and a water blocking strength member layer wound helically or in reverse-oscillated lay about the optical fibers at a second tension and a second lay length such that the combination of the buffer material, first tension, first lay length, second tension and second lay length result in an indoor/outdoor dry core optical cable capable of meeting ICEA-696 standards.

Dry core indoor/outdoor fiber optic cable

A torque capstan is provided for use in an optical fiber cable manufacturing process which enables reverse oscillating lay (ROL) length to be maintained. The torque capstan comprises a first portion having at least two pulleys rotationally mounted thereon, a second portion having at least two pulleys rotationally mounted thereon, and first and second drive belts mounted on the pulleys of the first and second capstan portions, respectively. Rotational motion is imparted to the first and/or second drive belts through a drive system that is coupled to a drive pulley of at least one of the first and second capstan portions. Rotation of at least one of the drive pulley(s) causes the respective drive belt to rotate in a direction parallel to, or substantially parallel to, a direction in which an optical fiber cable being manufactured in the optical fiber cable manufacturing process is being pulled. Contact between the drive belts causes the drive belts to rotate in the same direction. At least one of the first and second drive belts has a longitudinal groove formed therein that is parallel to, or substantially parallel to, the direction in which the optical fiber cable is being pulled. The belts grip and pull/push the cable in such a way that the ROL length is maintained over a length of the optical fiber cable, thus improving the quality of the manufactured optical fiber cables.

Torque capstan that improves reverse oscillating lay (ROL) consistency during an optical fiber cable manufacturing process

A method, apparatus and system for improving reverse oscillating lay (ROL) consistency during an optical cable manufacturing process. A torque capstan receives an optical fiber cable from an ROL machine that places reverse-oscillating lay on the core of an optical cable, but also generates some undesirable fluctuating back-tension in a direction opposite a direction in which the optical fiber cable is being pulled during manufacturing of the optical cable. The optical cable comprises a plurality of subunit cables. A drive system coupled to the torque capstan is controlled by a control system in such a way that the torque capstan applies a certain amount of force to the optical cable in a direction substantially parallel to the direction in which the optical cable is being pulled during manufacturing. The certain amount of force applied to the optical fiber cable reduces undesirable fluctuating back-tension placed on the optical cable during the manufacturing process, thereby improving reverse oscillating lay (ROL) consistency, which improves the quality of the manufactured optical cables.

System for the reverse oscillating lay (ROL) consistency during the optical fiber cable manufacturing process

A preferred embodiment of the dry core optical fiber cable of the present invention incorporates a plurality of sub-units with each of said sub-units being arranged adjacent another of the sub-units so that the plurality of sub-units define an outer periphery. Preferably, each of the sub-units includes a plurality of optical fibers, a yarn layer and a sub-unit jacket, with each of the optical fibers being arranged adjacent another of the optical fibers. The sub-unit jacket surrounds the optical fibers, with the yarn layer being disposed between the optical fibers and the sub-unit jacket. An outer jacket surrounds the plurality of sub-units, with water-blocking tape being disposed between the outer jacket and the outer periphery of the sub-units. A method of manufacture of the cable also is provided.

Dry core optical fiber cables for premises applications and methods of manufacture

A preferred embodiment of the cable of the present invention incorporates a core, an outer jacket surrounding the core, and a tape disposed between the core and the outer jacket. The tape includes a first layer and superabsorbent polymers (SAPs) which are applied to the first layer. Preferably, the first layer is formed of spun bonded non-woven polyester material, nylon spun bonded fabric, non-woven glass, polypropylene melt blown non-woven fabric, polyurethane spun bonded fabric, or TCF cellulose fabric, among others. Additionally, the SAPs preferably are provided with a moisture content of greater than approximately 2 percent, by weight, thereby improving the flame-retarding characteristics of the tape.

Cables with water-blocking and flame-retarding tapes

Growing community of inventors

Duluth, GA, United States of America

Mark I Shmukler