Barnstead Thermolyne Corporation

Carefusion 207, Inc.

Natus Medical, Inc.

Eric Garz

Mark D Lockwood

Roger W Earle

James R Edwards

Kerry W Leppert

William Kolasa

Kenneth David Hermsen

Curt McFadden

Eric Jackson

John L Meek

Daniel J Lombardi

Yongshou Xia

Geoffrey Reber

Peter O Lee

Jason J Schmitt

A method and apparatus for determining the impedance of the plurality of channels comprising a plurality of channels having a plurality of first channels and a plurality of second channels, at least one reference channel, a signal generator electrically connected to the plurality of channels, a reference signal generator connected to the reference channel, at least one amplifier connected to each of the plurality of channels and the reference channel and at least one filter connected to an output of the at least one amplifier to filter the output signal from the at least one amplifier. The signal generator is configured to provide a plurality of input signals to the plurality of channels. The reference signal generator provides an input signal to the reference channel.

Simultaneous impedance testing method and apparatus

A cable for enhancing biopotential measurements, including a core, the core including a first conductive line, a first shield that surrounds the first conductive line, and a first insulator that surrounds the first shield. The cable further includes a control section located outside the core, which includes a second conductive line, a second shield that surrounds the conductive line, and a second insulator that surrounds the second shield.

Cable for enhancing biopotential measurements and method of assembling the same

A stirring hot plate for simultaneously heating and stirring a mixture includes a phase controlled motor that spins magnets which couple to, and thereby spin, a stir bar within the mixture. In addition to spinning the magnets, the motor includes an operational mode in which the motor is rapidly braked thereby quickly spinning down the stir bar. The stirring hot plate also includes a visual indicator to the user that the platform is hot-to-the-touch that is especially effective when the stirring hot plate is not in use.

Stirring hot plate

A method of determining liquid absorption of an aggregate comprises providing a sample of the aggregate, adding liquid to the sample, subjecting the sample to a light source signal, monitoring a light reflected signal reflected from the sample and controlling addition of liquid to the sample as a function of the light reflected signal. The apparatus comprises a support for supporting a sample of the aggregate, a liquid source for adding liquid to the sample, a light source which subjects the sample to a light source signal, a light sensor which senses a reflected light signal reflected from the sample and a processor/controller which controls addition of liquid from the liquid source as a function of the reflected light signal. The light source is preferably an infrared source and the light sensor is preferably an infrared detector. The sample is weighed in a dry state and in the saturated surface dry (&ldquo;SSD&rdquo;) state and the percent by weight of aggregate water absorption and hence aggregate binder absorption and/or bulk specific gravity is then calculated. A weighing device can be incorporated directly into the apparatus.

Method and apparatus for determining liquid absorption of aggregate

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Platteville, WI, United States of America

Eric Garz