Abstract: A gas sampling system utilizes small sample vacuum transport to reduce the dew point of the sample. A vacuum pump maintains a substantial vacuum on the sampling system causing a sample, drawn at a rate less than a liter per minute, to be drawn and transported under partial vacuum for analysis. A dryer can be placed near the sampling probe to further reduce the dew point prior to the vacuum transport. The dew point of the sample is affected by both the dryer and the degree of vacuum transporting the gas mixture. As such, the dew point can be varied indefinitely by any reasonable combination of moisture removal by the dryer and vacuum pump strength.

Abstract: A method and apparatus for dynamic calibration of monitoring equipment of the type which uses a Type-S pitot tube connected to at least one transducer utilize a calibration air conduit having a distal end positioned opposite one opening of the Type-S pitot tube and a proximate end. A blower connected to the proximate end of the calibration air conduit blows air past the standard pitot tube and at least one opening of the type S pitot tube. A standard pitot tube placed in the calibration air conduit. Differential pressure readings are taken. There is a relationship between the differential pressure reading of the standard pitot tube and the differential pressure reading of the Type-S pitot tube which does not change unless the monitoring equipment of which the Type-S is a part leaks, is plugged or is otherwise operating improperly.

Abstract: A improved Type S or reverse type pitot tube has two conduit legs which are mirror images of one another. Each conduit leg has an input portion having a pressure port therein, a support portion and a connecting portion connected between the input portion and the support portion. The support portion and the connecting portion lie in one plane which plane is substantially perpendicular to a centerline through the input portions. The conduit legs are shaped and oriented relative to one another so that the pressure ports of the input portions of the first and second conduits are collinear and when placed in a conduit, the pitot tube will be symmetrical in a yaw plane and both symmetrical and non-interfering in a pitch plane. The first and second conduits are spaced apart over at least a portion of their length to define an opening adjacent the input portions which opening is at least 3 times wider and deeper than the input portions.

Abstract: An improved probe useful for measuring emissions of stack gases is equipped with a means for measuring moisture content and molecular weight of stack gases. A water feed tube is provided through the distal end of the probe and is fed water via a water feed line. An electrical temperature measuring device and water soaker device having spaced apart soaker feed holes is provided near the distal end of the water feed tube while a dry tubing encases the water feed tube below the temperature measuring device. A soaker wick encases part of the water feed tube and covers all of the temperature measuring device. Finally, an internal seal is provided between the dry tubing and the temperature measuring device to prevent thermally conductive heat from reaching the temperature measuring device. This structure enables the probe to make wet bulb-dry bulb measurements of stack gases.

Abstract: A gas sampling system utilizing a pair of parallel sonic orifices. One of the orifices is connected to a source of filtered, heated samples. The second, larger orifice is connected to a source of dilution gas. A vacuum pump maintains a substantial vacuum behind the orifices, thus assuring critical flow therethrough. The sample and diffusion gas are mixed behind the orifices and transported under partial vacuum for analysis. The dew point of the sample is affected by both the ratio of the diameter of orifices and the degree of vacuum transporting the gas mixture. As such, the dew point can be varied indefinitely by any reasonable combination of orifice ratio and vacuum pump strength.

Abstract: A gas sampling system utilizing a pair of parallel sonic orifices. One of the orifices is connected to a source of filtered, heated samples. The second, larger orifice is connected to a source of dilution gas. A vacuum pump maintains a substantial vacuum behind the orifices, thus assuring critical flow therethrough. The sample and diffusion gas are mixed behind the orifices and transported under partial vacuum for analysis. The dew point of the sample is affected by both the ratio of the diameter of orifices and the degree of vacuum transporting the gas mixture. As such, the dew point can be varied indefinitely by any reasonable combination of orifice ratio and vacuum pump strength.

Abstract: A large second order nonlinearity is induced in SiO.sub.2 portions of a waveguide enabling inducement of second order harmonic waves in the waveguide for numerous applications in integrated optics and optoelectronics.

Abstract: A large second-order nonlinearity (.chi..sup.(2) .about.1 pm/V.about.0.2 .chi..sup.(2).sub.22 of LiNbO.sub.3) is induced in the near surface (.about.4 .mu.m) region of commercial fused silica optical flats by a temperature (250.degree.-325.degree. C.) and electric field (E.about.5.times.10.sup.4 V/cm) poling process. Once formed, the nonlinearity is roughly 10.sup.3 -10.sup.4 larger than that found in fiber second-harmonic experiments and is very stable at room temperature and laboratory ambient. The nonlinearity can be cycled by repeated depoling (temperature only) and repoling (temperature and electric field) processes.

Abstract: The invention is a method for the vapor deposition of a thin metal film onto a polymeric surface. The method comprises the steps of placing the polymeric surface within a vacuum chamber, and evacuating the chamber to a near-perfect vacuum. The chamber is next filled with argon gas. Sufficient voltage and amperage are applied to the argon gas within the chamber to electrically excite that gas, thereby creating a cloud of free argon electrons which prepare or impart a charge to the polymeric surface. The argon is then evacuated from the chamber, and the chamber is then placed at a suitable plating vacuum. The improvement in the present invention comprises the use of a metal yarn comprised of thin strands of that metal. A conventional electrode, such as a tungsten electrode, disposed within the chamber and wrapped with this yarn is energized sufficiently to rapidly vaporize the metal. The rapidly vaporized metal is transported towards and then coated onto the prepared, charged polymeric surface.

Abstract: An improved split thrust washer assembly for a vehicle transmission speed shaft. The assembly includes a pair of semi-circular washer segments held in a speed shaft circumferential groove by a C-type compression retaining ring. The ring biases each washer segment interior surface into contact with the groove base wall during maximum shaft speeds thereby neutralizing the centrifugal force tending to separate the segments from the groove. The segments have radially extending opposed end faces having a predetermined minimal clearance therebetween thereby insuring that the segments are maintained in contact with the groove. The thrust washer assembly allows a shallower groove to carry the design thrust loads so as to improve shaft fatigue life.

Abstract: A package for preserving produce in a wholesome condition for an extended period of time is formed by a sealed container enveloping the produce and filled with a preservative gas which inhibits bacterial growth. The container is formed by a high barrier film which is so perforated as to provide a gas pressure within the container sufficient to inhibit air inflow into the container and to assure gas outflow from the container to prevent its distortion.

Abstract: The gear selector shaft of a manually operated transmission has shift mechanisms secured thereto for producing driving engagement between the engine and the vehicle wheels at the speed ratio selected by the vehicle operator. By moving the selector shaft along shifting planes that are defined by a control plate, the shift mechanisms actuate the selected gear into engagement with the gears of the input shaft. The control plate has a system of interconnected slots into which a gear selector pin, which is secured to the gear selector shaft, is fitted. The slot system corresponds to the conventional shifting pattern over which the vehicle operator exercises control. The control plate serves to positively restrain erratic movement of the selector shaft that could cause damage to the transmission. A second embodiment provides for the gear selector shift control pattern to be secured to the selector shaft and its movement to be controlled by the movement of that pattern about the position of the selector pin.