Desco Industries, Inc.

3m Innovative Properties Company

Siarhei V Savich

Chee Ming Ng

Kam Poi Chia

Lee A Fain

Yoshiaki Sato

John Zenon G Vallinan

Qin Fei Chen

Francisco J Rodriguez

Qinfei Chen

Matthew J Storey

John Zenon Galasgas Vallinan

A grounding monitoring device is disclosed herein. In a described embodiment, the grounding monitoring device comprises a wrist strap comprising a first conductive portion for providing a first discharge path between a human arm and a ground; and a second conductive portion electrically isolated from the first conductive portion for providing a different second discharge path between the human arm and the ground. The grounding monitoring device further comprises a bipolar control voltage generator for applying a first voltage at a frequency fto the first conductive portion and an opposite second voltage at the frequency fto the second conductive portion; and an electrical circuit for: receiving a first total signal from the first conductive portion; receiving a second total signal from the second conductive portion; and forming an output signal based on a differential and common mode gains of the electrical circuit. The grounding monitoring device further comprises a comparator for comparing a portion of the output signal that corresponds to the frequency fwith a first threshold value; and comparing a portion of at least one of the first total signal and the second total signal that corresponds to the frequency fwith a second threshold value; wherein an alarm signal is activated depending on the comparisons made by the comparator.

Grounding monitoring device

An ionizer, including: an ionizing electrode for ionizing air and having a longitudinal first direction; and a cleaning member including a plurality of spaced apart bundles of bristles for cleaning the ionizing electrode when the cleaning member comes into contact with the ionizing electrode, each bundle of bristles in the plurality of spaced apart bundles of bristles being offset relative to the other bundles of bristles in the plurality of spaced apart bundles of bristles along the first direction and along a second direction perpendicular to the first direction.

Ionizer with a needle cleaning device

In one example, this disclosure describes a circuit and techniques that may be used to measure the ion balance in an ionization balance device (). The described circuit comprises a capacitor () that includes two conductors (), wherein a first one () of the conductors is exposed to the output of the ionization device, and the second one () of the conductors is shielded from the output of the ionization device. The first conductor may accumulate charge so as to quantify the output of the ionization balance device. A switch () may be used to discharge the first conductor at periodic intervals in order to measure the accumulated charge on the first conductor, and signal processing may be performed on this discharge measurement in order to generate feedback that can be used to control and adjust the output of an ion source.

Ionization balance device with shielded capacitor circuit for ion balance measurements and adjustments

An air ionization monitoring deviceand method is disclosed herein. In a described embodiment, the air ionization monitoring devicecomprises an ion sourceadapted to emit ionsand a capacitorincluding a first conductorarranged to be exposed to the ionsemitted by the ion source, and a second conductorarranged to be shielded from the ionsemitted by the ion source. The monitoring devicefurther includes a commutation circuitoperable between a first configuration for charging the capacitorto a first predefined voltage, and a second configuration for using the ionsemitted by the ion sourceto discharge the capacitorfor a predefined time resulting in the capacitorhaving a second voltage. The deviceis configured to use the first and second voltages to determine an ionic current of the emitted ions.

Ionization monitoring device

A device for detecting an electrostatic discharge event by an object, the device comprising: a receiver for forming a first capacitive coupling with the object and a second capacitive coupling with a ground; and a first discharge path for discharging the second capacitive coupling to the ground, such that an electrostatic discharge event by the object charges the second capacitive coupling by an amount in a first time interval &#x394;tthat is substantially less than a second time interval &#x394;tthat it takes for the second capacitive coupling to discharge by the same amount through the first discharge path.

Growing community of inventors

Singapore, Singapore

Siarhei V Savich