Sensata Technologies, Inc.

Sensata Technologies Massachusetts, Inc.

Michael J Lavado

Christian V Pellon

Keith W Kawate

Jeffrey B Ting

Peter G Berg

Lucien Paul Fontaine

Michael T Parker

Keith Richard Washburn

Keith A Singer

Mark David Rabiner

Christopher A Nicolls

Roger D Mayer

Lynwald Edmunds

William Bentley

Robert Zanelli

Eric Morrison

Thomas Gasper

Joseph L Medeiros

Chistian Pellon

Jacky C Chan

Mark C Carlos

Amin Younes

Timothy Janek

Stephanie Altrui

Jan Klein Bluemink

Lucien Fontaine

Michael Parker

In an embodiment, a pressure transducer includes a first portion, a second portion, and a third portion. The third portion is positioned in a cavity contained in the second portion. In addition, a seal is placed in the cavity. The first portion and second include provisions for applying a downward pressure on the third portion when the first portion and the second portion are joined. The downward pressure is applied by the third portion to the seal the cavity. The first portion also includes a stop and the second portion also includes a snap member. The snap member includes a prong that contains a first edge and a second edge. The snap member allows movement of the first portion after the first edge of the prong meets the stop and restricts movement of the first portion after the second edge of the prong meets the stop.

Pressure transducer

In an embodiment, a pressure transducer includes a first portion, a second portion, and a third portion. The third portion is positioned in a cavity contained in the second portion. In addition, a seal is placed in the cavity. The first portion and second include provisions for applying a downward pressure on the third portion when the first portion and the second portion are joined. The downward pressure is applied by the third portion to the seal to seal the cavity.

Pressure transducer with multiple joinable portions

A circuit interruption device includes at least one constriction zone. The constriction zone provides for interference with arcing of an electrical signal. The device may include at least one expansion zone. The device may include at least one movable component to assist in creation of the at least one constriction zone. A method of fabrication is provided.

Circuit interruption device with constrictive arc extinguishing feature

An apparatus and method for detecting electrical arc faults that has reduced susceptibility to nuisance tripping. The apparatus includes a current sensor, an input sense circuit, an arcing sense circuit, a power supply, a tripping circuit, a processing unit, and an electromechanical interface. The processing unit measures multiple voltage levels provided by the arcing sense circuit during a specified number of consecutive time periods. Next, the processing unit determines the number of consecutive time periods during which the voltage levels exceeded a specified minimum value, take on successively lower or higher values, or fall outside a predetermined normal range of values. Based upon the results of this determination, the processing unit either trips the electromechanical interface to interrupt power to a load, or inhibits tripping of the electromechanical interface, thereby reducing the occurrence of nuisance tripping.

Methods of detecting arc faults characterized by consecutive periods of arcing

A shouldered connector pin socket () is shown having an open channel () formed in the face surface of a wall member of a circuit breaker housing. An electrically conductive spring member (') is received over the channel and is formed with a first set of spring fingers () that are adapted to engage a connector pin along a first axial length () of the channel making electrical engagement with the pin and urging the pin against the channel surface as the pin is slidingly inserted into the channel. The spring fingers urge the flange of the connector pin into a recess formed by a stepped shoulder defining the entrance to a second axial length () with the stepped shoulder and the spring fingers cooperating to retain the connector pin in the channel. A second set of spring contact fingers () can also be used to engage the connector pin along a third axial length () and thereby provide a redundant contact system.

Circuit breaker with improved connector socket

An apparatus and method for detecting arc faults that have reduced susceptibility to nuisance tripping. The apparatus includes a current sensor, an input sense circuit, an arcing sense circuit, a power supply, a tripping (firing) circuit, a processor, and an electromechanical interface. The current sensor monitors a power input comprising an AC current, and provides high frequency components of the. AC current to the input sense circuit. The input sense circuit filters and rectifies the AC signal, and provides the rectified signal to the arcing sense circuit. The arcing sense circuit provides a voltage level accumulated over a predetermined time period, and digital signals indicative of possible electrical arcing occurring during the sampling period, to the processor. The processor measures the voltage level, stores information relating to measured voltages and the digital signals, and processes the stored information using one or more algorithms, thereby determining whether the signals resulted from an arc fault or a nuisance load. In the event the signals resulted from an arc fault, the processor activates the firing circuit to trip the electromechanical interface, thereby interrupting the power output to the load.

Apparatus for detecting arc faults

Method for detecting arc faults

Growing community of inventors

Griswold, CT, United States of America

Michael J Lavado