Coiled wire assembly

Fig. 3 Flame housing of IL 943 flame photometer a) sodium filter, 589 nm b) potassium filter, 776 run c) lithium filter, 670 nm d) cesium filter, 852 nm e) ignition detector f) burner assembly g) rubber gasket h) spark electrode i) ignition coil wire j) chimney. (Courtesy of Instrumentation Laboratory, Inc.)...

Another variation of making an electrode connection is shown in Fig. 3.2. In this case, bare copper wire is inserted into a glass tube and coiled at the end. The coiled wire is attached to the back side of the sample using silver paint and allowed to dry at 80 °C for 20-30 min. The entire assembly is then encased in epoxy and annealed at 80 °C for 2 h. 

There are several possibilities for preparing and testing assemblies prototype assemblies can be produced and exposed to namral atmosphere, or test pieces consisting of threaded bars made in steel, copper, etc. can be provided, around which aluminium wire, weighed before and after the test, is coiled (wire-on-bolt test) [16]. 

Recommended methods for assessing the corrosivity of waters, including flowing potable waters, are described in ASTM 02688 1983. Three procedures are described in which test specimens in the form of wires, sheets or tubes are placed in pipes, tanks or other equipment. The test assembly for the first of these consists of three helical wire coils mounted in series on, and electrically insulated from, a supporting frame. The assembly must be installed so that flow is not disturbed and turbulence and high velocities, e.g. of more than 1 -53 ms , are avoided. A minimum test period of 30 days is recommended. Procedures for the other specimen forms are given in the standard. 

A Wood s metal bath contains a metal alloy (50 per cent bismuth, 25 per cent lead, 12.5 per cent tin, and 12.5 per cent cadmium) with a low melting point ( 70°) which may be used up to quite high temperatures ( 400°). The metal is easily oxidized at the higher temperatures and, therefore, is usually covered with a protective layer of carbon. An electrically heated bath is recommended, since the temperature is then easily controlled. This may be made by taking an ordinary tin can (preferably low and wide), covering it with asbestos paper, and winding a coil of nichrome wire around it. The wire is covered with more asbestos paper held in place by some coils of copper wire. The entire assembly is placed inside a metal container such as... 

Schematic diagrams of commercial tin oxide sensors by Figaro Engineering Inc. are shown in figure 14.2. The sensor of figure 14.2(c) consists of a small ceramic tube coated with tin (IV) oxide and a suitable catalyst. A heater coil maintains the tin oxide temperature (between 200 and 500 °C). The signal is the resistance measurement between the two electrodes at opposite ends of the tube. The assembly is packaged in a protective housing with an open area (covered by wire mesh) to allow gases to enter.

Each NMR instrument has a depth gauge to allow us to position the NMR tube correctly with respect to the spinner. Figure 2.1 shows the correct spatial relationships between the tube, the spinner that holds it, and the region of the NMR tube that will occupy the probe s detector (a coil of wire that is an inductor in a resistor-inductor-capacitor circuit) when the spirmer-tube assembly is in the instrument. Note that not all of the sample volume occupies the detected region. 

Fig. 3.2 Connecting an electrode with Cu wire. Bare Cu wire is inserted into a glass tube and coiled at the end to increase surface area (a). The back side of the sample (b) is connected to the Cu coil using silver paint, followed by the addition of HYSOL 9462 epoxy (c) to encase the entire assembly. The finished product is shown in (d)...

Some molded parts have configurations which require portions of the cavity to be removed in order for the part to be ejected. Solenoid coil bobbins, as an example, consist of a cylindrical body around which wire will be wound, with two large flat flanges at each end of the cylindrical body to keep the wire contained within the length of the body. Additionally, there is a hole through the length of the cylindrical body to accommodate the plunger of the solenoid assembly. 

E, typical proton orbit F, upstream mirror coil G, wall resistor wires H, axis diagnostic assembly with pickup loops I, vacuum chamber wall. Also shown is the total magnetic field at r = 0 with the upstream mirror field dashed. 

Calculators Coil binding Computer assembly Electronic parts Hearing aids Microprocessors Medical equipment Small electric motors Speaker magnets Stereo components Wire tacking... 

In this device, a platinum wire-filled tube made of a Nation cation-exchange membrane is inserted into another, larger Nation tube and coiled into a helix. The helical assembly is inserted within an outer jacket packed with granular conductive carbon. An alkaline eluent, for example, NaOH or Na2C03, flows in the annular channel between the two membranes, and pure water flows through the inner membrane and the outer jacket countercurrent to the direction of eluent flow. A DC voltage (3-8 V) is applied across the carbon bed and the platinum wire. 

The "ammeter" part of the multimeter is not labeled in this diagram, but it is the same assembly as appeared in Fig. 2.2 on page 12. This consists of a coil (three "turns" of wire are shown, although actually it would have many more turns), an iron core (symbolized here by three parallel lines), a spiral... 

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