Fluke Corporation

John Fluke Mfg. Co., Inc.

Warren H Wong

Mark E Lockman

Joseph V Ferrante

Monte R Washburn

Raymond D Zoellick

Wilbur R Ames, Iv

John A Gibbs

Howard T Voorheis

Jim T Ray

Kenneth A Coulson

Norbert Werner Jauch

Donald P Matson

Tod K Johnson

Generally described, one or more embodiments of the present disclosure are directed to switch assemblies and methods for switching from one state to another. In some examples, a switch assembly may switch from one electrical contact to another electrical contact by moving a conductive spring or member from a first conductive contact on a printed circuit board (PCB) to a second conductive contact on the PCB. For instance, in one embodiment, a conductive member moves within a slot in the PCB. In another embodiment, a compression force applied to a conductive spring is reduced while the conductive spring moves from a first conductive contact to a second conductive contact.

Electrical switches and methods

An on-board measurement system includes a plurality of measurement modules each provided with internal or external transducers and a control module for conducting desired testing procedures. The modular logging apparatus is removably secured to a product undergoing a manufacturing process or the like whereby numerous or substantially continuous measurements can be made of environmental factors affecting a product. The control module also receives and stores measured data for later retrieval.

On-board measurement system

A test lead set for a four-terminal ohmmeter comprises separate conductor pairs with one conductor of each pair connected to a source while the other conductor of the same pair is connected to a meter. The conductor pairs, which are received within separate insulating shrouds, are provided at their remote ends with bifurcated clips having jaws for making individual connections between the conductor leads and a terminal of a device under test. The test lead set is coupled to the measuring instrument by banana-type plugs having separated conductive portions for engaging contacts within instrument receptacles so that separate connections to the source and measuring device can be maintained. The instrument receptacles are backwards compatible with a conventional, two-terminal, test lead set.

Four-terminal ohmmeter apparatus

A compact isothermal connector for a thermocouple temperature measurement system has electrical contacts with thermal mass sufficiently larger than the thermal mass of the corresponding contacts of a corresponding thermocouple connector to provide for improved settling times and measurement accuracy. The contacts are thermally coupled to a multi-layer printed circuit board containing layers of embedded thermally conducting material to achieve sufficient thermal coupling between the contacts. The contacts have sufficient thermal mass to achieve a desired settling time. A temperature sensor is thermally coupled to the printed circuit board and to each electrical contact to sense the temperature of the isothermal connector and provide the temperature information to a temperature measuring instrument to correct for measurement errors from the connector junction voltage.

Compact thermocouple connector

A measuring device includes a microprocessor controller programmed for performing any of a plurality of mathematical functions on a measured value of a parameter under test. The measuring device is provided with two displays, for displaying to a user both the parameter value and its mathematical function. Annunciators are provided to identify the displayed function of the parameter. Thus, together with the measured parameter value, offset, scaling, peak-to-peak values, or the uncertainty of a reading may be displayed, as well as statistical functions of the measurement, including an average, standard deviation, median or mode of the parameter under test. The methematical function display is updated concurrently with the display of the measured parameter value.

Measurement apparatus with plural displays of measured parameter and

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Seattle, WA, United States of America

Warren H Wong