Texas Instruments Corporation

Aime J Grenier

Robert W Peterson

Hans G Hirsbrunner

Lyle E McBride, Jr

Odd Larsen

Robert J Bowen

Lvle E McBride

A remotely controlled circuit control device has first and second load contact assemblies movable into circuit engagement and circuit disengagement positions relative to one another in which one load contact assembly is operatively connected to a solenoid so that alternate forward strokes of the solenoid moves the one load contact assembly between reset and tripped positions through a push-push mechanism having an indexing portion and a latching portion. An overload mechanism cooperates with the latch portion to cause the load contact assemblies to move to the circuit disengaged position upon occurrence of a fault condition. The second load contact assembly includes pivotably mounted contact members which are linked to the first load contact assembly in such a way that circuit engagement during solenoid energization is precluded. The push-push mechanism is operatively connected via a mode switch to either a reset circuit or a trip circuit and in turn to a remotely disposed indicator-control unit (ICU) through an optical coupler. Contact status and coordination between load contacts and ICU contacts are provided by a feedback circuit. An interface circuit allows operation of the circuit control device without discrimination on a power supply of either alternating or direct voltage or both. Life expectancy of the device is enhanced by several features including double break contacts with contact wiping and the provision of a floating output arm for the solenoid.

Magnetic circuit control apparatus

Circuit control device

Interface circuit apparatus

Circuit control system

Remote control circuit breaker circuit

A high performance, manually and automatically operable, trip-free magnetic circuit breaker incorporates a double break contact system to achieve longer life, more reliable operation and improved rupture capacity.

Circuit breaker

A high performance, manually and automatically operable, trip-free magnetic circuit breaker incorporates a collapsible linkage having selected elements of precision molded plastic cooperating in a dual latch system, the linkage being adapted to be accurately assembled and mounted in the breaker without requiring adjustment inside the breaker housing; incorporates a double break contact system to achieve longer life, more reliable operation and improved rupture capacity; and incorporates auxiliary switch means with improved actuator biasing to achieve more reliable breaker operation in auxiliary switch applications.

Circuit breaker having cam surfaces on the trip member

A high performance, manually and automatically operable, trip-free magnetic circuit breaker incorporates novel means for mounting and coupling circuit breaker units to achieve multipole operation. An actuator in each pole has a shaft extending through a housing wall and fitting in splined engagement with the shaft of a corresponding actuator in an adjacent pole mounting the actuators for unison pivotal movement between a position where one of the actuators is engaged and pivoted by movement of the beaker contacts to an open circuit position in one pole for pivoting the other actuator to trip the breaker components in the adjacent pole to open the circuit in the adjacent pole. A tie-pin having a peripheral groove therein is snugly fitted into openings in the operating handles of the breaker pols and has coil springs fitted over the pin between pairs of the handles, one spring having a convolution of reduced diameter fitted into the pin groove for retaining the pin in the handle openings.

A high performance, manually and automatically operable, trip-free magnetic circuit breaker incorporates compact, readily accessible calibration means in which the direction of application of a substantially constant spring force is varied to permit convenient, high resolution calibration of the breaker.

A high performance, manually and automatically operable, trip-free magnetic circuit breaker incorporates a housing having housing parts secured together by external mounting clips to achieve better electrical characteristics, to permit reliable assembly with reduced risk of housing damage during assembly, and to facilitate mounting of the breaker on a control panel; and incorporates a modular structure permitting adaption of the breaker for use in a variety of breaker applications while minimizing circuit breaker costs.

A high performance, manually and automatically operable, trip-free magnetic circuit breaker incorporates a magnetic actuation system with improved core, clapper and coil mounting to achieve more accurate and consistent breaker operation; incorporates a modular structure permitting adaptation of the breaker for use in a variety of breaker applications while minimizing circuit breaker costs; and incorporates improved magnetic circuit means to achieve more reliable breaker operation in flux switch type breaker applications.

Growing community of inventors

North Attleboro, MA, United States of America

Aime J Grenier