ROBERT ERIC UBER
Pilots at Ben Hur St, Pittsburgh, PA

6353324, Mar 5, 2002

Nov 5, 1999

09/435100

Joshua J. Ziff - Murrysville PA
Robert E. Uber - Pittsburgh PA

Bridge Semiconductor Corporation - Pittsburgh PA

G01R 2912

324457

The present invention relates to an electronic circuit and an array of such circuits for precisely measuring small amounts or small changes in the amount of charge, voltage, or electrical currents. One embodiment of the present invention provides an electronic circuit for measuring current or charge that can be used with a variety of sensing media (including high impedance sensing media) that produce a signal by either charge or current production or induction in response to physical phenomena occurring within the sensing media. In another embodiment, the voltage level (bias) of either the sensing or reference electrode can be switched relative to the other upon receipt of a triggering pulse. This changes the polarity of the electric field to cause charge of the opposite polarity to be driven to the sensing electrode, thereby eliminating the need to electrically connect a discharge path to the sensing electrode to clear the charge accumulated at the sensing electrode. This can be supplemented by capacitively coupling a compensation signal to the sensing electrode to cause the amplifier output signal to lessen in magnitude below a threshold level that permits additional charge or current measurements of the same polarity before performing bias reversal.

7106445, Sep 12, 2006

Aug 6, 2003

10/635270

Robert E. Uber - Pittsburgh PA, US

Mine Safety Appliances Company - Pittsburgh PA

G01N 21/00

356432, 356437, 73 2402

The present invention relates to a photoacoustic gas sensor utilizing diffusion having a sensing volume and an acoustic pressure sensor volume containing an acoustic pressure sensor such that the fluid connection between the sensing volume and the acoustic pressure sensor volume restricts the flow of analyte gas therethrough but does not restrict the transmission of the photoacoustic signal therethrough.

2013007, Mar 28, 2013

Sep 23, 2011

13/242677

CHRISTOPHER D. STARTA - PITTSBURGH PA, US
ROBERT E. UBER - PITTSBURGH PA, US
THOMAS TRAUTZSCH - CRANBERRY TOWNSHIP PA, US
FREDERICK J. SCHULER - WEXFORD PA, US

G01J 5/08, G01N 21/01

2503417, 250353

A closed path infrared sensor includes an enclosure, a first energy source within the enclosure, at least a second energy source within the enclosure, at least one detector system within the enclosure and a mirror system external to the enclosure and spaced from the enclosure. The mirror system reflects energy from the first energy source to the at least one detector system via a first analytical path and reflects energy from the second energy source to the at least one detector system via a second analytical path. Each of the first analytical path and the second analytical path are less than two feet in length.

7886576, Feb 15, 2011

Aug 31, 2007

11/897754

Robert E. Uber - Pittsburgh PA, US

Mine Safety Appliances Company - Pittsburgh PA

G01N 21/61, G01N 29/02

73 2402, 356432, 356437

A photoacoustic sensor includes a sensor system for photoacoustic detection, at least one noise canceling pressure sensor and a control system in operative connection with the noise canceling pressure sensor to actively cancel the effects of noise in the environment on the sensor system. Another photoacoustic sensor includes a measurement volume, a source of light energy, a photoacoustic pressure sensor, and at least one vibration canceling sensor (for example, a microphone or an accelerometer). A further photoacoustic sensor includes a measurement volume, a source of light energy and a photoacoustic pressure sensor. The measurement volume has an inner surface that is continuously curved over substantially the entire inner surface other than where a window in optical connection with the source of light intersects the measurement volume.

7835004, Nov 16, 2010

Sep 6, 2007

11/899508

Robert E. Uber - Pittsburgh PA, US

Mine Safety Appliances Company - Pittsburgh PA

G01N 21/00

356437

A gas sensor includes a light source, a power source in operative connection with the light source and a control system in operative connection with the light source and the power supply. The control system is adapted to control power input from the power source to the light source such that the time period of the control frequency is shorter than the thermal time constant of at least one of (i) the infrared light source, (ii) the gas within the sensor, or (iii) a detector of the sensor. The time period of the control frequency can, for example, be no greater than ⅓ of the thermal time constant, no greater than 1/10 of the thermal time constant, or even no greater than 1/20 of the thermal time constant. A feedback signal can be provided to the control system assist in achieving control.