The Babcock & Wilcox Company

Bailey Meter Company

George R Hall, Ii

Thomas L Bohl

Sharon L Zimmerlin

Jack M White

Lonnie J Richman

Roger L Krechmery

Daniel C Barnett

A device for sealing and isolating analyzer gas sample flows in an aspirated sampling system is provided with a drainage channel surrounding the gas sample inlet to isolate the inlet in the plane of the sealing surface from a pressurized air supply channel in the sealing surface and intercept leakage from the air supply channel. The drainage channel is connected to a cavity via a constricted flow path to reduce leakage pressure and the cavity is vented to the environment.

Analyzer block for sealing and isolating analyzer gas sample flow

A cover for a portion of a control panel module is disclosed. The cover is pivotally attached to an edge of the control panel module and encloses a configuration plug for reprogramming purposes and other switches on the control panel module. The top surface of the cover can be utilized to support the cord which interconnects a reprogramming device to the configuration plug on the control panel module during the programming process. A projection is provided on the top surface of the cover to prevent the cord from slipping off of the cover when the reprogramming device is so interconnected.

Method for concealment and access to control panel functions

A mounting bracket assembly for electronic instrument mounting which also provides for heat dissipation and environmental protection. Side slots in the sides of the mounting bracket permit natural convection air currents to circulate through a plurality of openings in the top and bottom sides of the housing module secured by the assembly to a control panel, but prevent direct entry of liquids, particle contaminents or projections from coming into contact with the electronics contained therein.

Mounting bracket assembly for electronic instrument mounting, heat

A filter cleaning system for an opacity monitor which has a light source and a light sensor on opposite sides of a first optical path through a gas whose opacity is to be measured, comprises a mechanism for calibrating the opacity monitor during a calibration period and a purging air arrangement for supplying purging air to pipes in the first optical path to keep the interior of the pipes clean. A primary filter is connected to the blower for filtering the purging air. Three-way valves are connected to the input and the output of the blower so that a secondary filter can be utilized to supply clean air in a reverse flow through the primary filter to clean the primary filter. The primary filter is cleaned during this blow-down period at the same time that calibration is taking place for the opacity monitor. In this way, no measuring time is wasted and still the life of the primary filter is extended.

Filter cleaning system for opacity monitor

A temperature-actuated flow control device has a fluid inlet connected to an exhaust line with a control chamber located therebetween. The control chamber has a free-floating bi-metallic circular element which is flexed in response to temperature changes between a first position stopping flow between the inlet and the exhaust line and a second position opening the flow therebetween. This flow control device, when adapted to a gas sampling system, allows the bi-metallic element remain in a first position at normal operating temperatures to permit the continuous sampling of the sample gas. Whenever the temperature falls below the dew point of the sample gas, the bi-metallic element returns to its second position to stop the sampling of sample gas by the system to prevent condensation in the system.

Temperature-actuated flow control device

An opacity monitor (10) including a light source (12) mounted on one side of a duct (14), and a detector (16) mounted on the opposite side of the duct is disclosed. The light source (12) and the detector (16) are rotated by motor means (26, 36), respectively, between a first position aligned with each other along an open light path defined across the duct (14) and a second position aligned with each other on opposite sides of a calibration tube (18) extending across the duct (14). Shutters (28, 38) rotate with the light source (12) and the detector (16), respectively, and are aligned with the calibration tube (18) when the light source (12) and the detector (16) are aligned with the open light path, and vice versa.

Opacity monitor

A pressure sensitive Silicon chip is indirectly bonded to a Stainless Steel housing of an electronic pressure transmitter through an intermediate holder assembly. This indirect bonding prevents thermal cracking of the Silicon chip due to the difference in thermal expansion of the Stainless Steel housing and the Silicon chip. The holder assembly includes a Borosilicate glass tube having the Silicon chip bonded thereto which tube is soldered to a Nickel-Iron alloy holder by a eutectic alloy solder. In assembly, the Nickel-Iron holder is first brazed to the stainless Steel housing at a first temperature greater than the maximum non-destructive temperature of either the chip or the glass tube and the glass tube is then soldered to the Nickel-Iron holder at a lower temperature which will not destroy the chip or the tube holder.

Growing community of inventors

Wickliffe, OH, United States of America

George R Hall, Ii