Metallic threads

Metall-erz, n. metallic ore. -faden, m. metal thread, metal filament, -fadenlampe, /. 

Figure 5-7 shows a simple electrometer. It consists of two spheres of very light weight, each coated with a thin film of metal. The spheres are suspended near each other by fine metal threads in a closed box to exclude air draffs. Each suspending thread is connected to a brass terminal. Next to the box is a battery —a collection of electrochemical cells. There are two terminal posts on the batteiy. We shall call these posts Pi and Pi. If post Pi is connected by a copper wire... 

Metal Threads. Metal threads, not really metal fibers but metal filaments, are human-made. In antiquity, metal threads were made for ornamental or decorative purposes from precious, ductile metals or alloys, particularly silver and gold and their alloys. Such threads were either applied with adhesives to finished fabrics or wound around ordinary textile yam cores the metal-covered yarn was then either woven into textile fabrics or embroidered on the textile fabric (Jaro and Toth 1991 Lee-Whitmann and Skelton 1984). 

Jaro, M. (2003), Metal threads in historical textiles, NATO Science Series, II Mathematics, Physics and Chemistry, Vol. 117 (Molecular and Structural Archaeology Cosmetic and Therapeutic Chemicals), pp. 163-178. 

Jaro, M. and A. Toth (1991), Scientific identification of European metal thread manufacturing techniques, Endeavour (New Series) 15(4), 175-179. 

The disk is then placed on the tip of a small glass tube and the electrical contact made through a conducting metallic thread (e.g. copper, or preferably, platinum). 

Base Plate usually refers to a thick metallic threaded disc which serves to close the rear con-... 

Construct the transducer body as follows Take a connection female of 2 mm diameter and place a metallic thread and then solder this connection at its extreme to the center of the copper disk with the concavity up. Clean the copper disk previously by dipping it in HNO3 solution (1 1) in order to remove copper oxide and rinsing it well with bidistilled water. 

Introduce this connection into the cylindrical PYC sleeve (6-mm i.d., 8-mm o.d. and 16-mm long). The metallic thread allows that the connection should remain fixed well in the end of the cylindrical PVC sleeve, whereas at another end there stays a cavity approximately 3-mm deep in which is placed the conducting composite and the permanent magnet [1]. Figure 53.1 shows the details of the M-GECE [1],... 

By itself a subject of study, metallic yam used in the past comes in a number of varieties that reflect the level of technology and trade of the time. A majority of metallic threads has been made into yarn by cutting prepared metallic material into strips that were then wound around a core thread of silk or linen. The metallic materials used were either gold or silver leaf adhered to membrane, parchment, leather, or paper or plain soft metal. Membrane is adversely affected by water and... 

Although the use of gold and silver metallic threads was fairly common in textiles for the wealthy, many of these fabrics are lost because of age and rotting. In addition, as Hoke and Petrascheck-Heim (5) indicated, these textiles were often burned to recover the precious metals. 

The textile pieces in the Brantley collection were subjected to historical research and microscopic analysis. These were done to verify the information already existing on the collection, to identify those fragments for which information was missing, to classify the fragments as textiles, and to identify the metallic threads that were part of the textiles. 

The collection pieces were examined and classified by dimensions, motifs, yarn construction, weaving technique, selvage, finish line, color, probable date, probable provenance, and presence or absence of metallic threads. After the initial classifications the pieces were taken to the Textile Museum in Washington, D.C., for comparison to extant Persian textiles in its collection. Comparisons were also done to pieces in the Hobart and Edward Small Moore Collection located at the Yale University Art Gallery. 

Although this first pseudorotaxane-based switch illustrates quite efficiently that electrostatic repulsion between the metalated thread 12-K+ and the cyclophane CBPQT4"1" is a reliable paradigm for inducing the dethreading of a complex, there was no opportunity to demonstrate the reversibility of the system - i.e., the potassium ions cannot be removed from the solution so that the switch can return to its original state. It is clear that any switching system has to be based upon a reversible system, in which the switch can be reset at will. Such a system is portrayed in Fig. 19. 

Electrode Construction 1. Take a connection female of 2 mm of diameter, place a metallic thread, and then solder this connection in its extreme to the... 

The metallic thread allows that the connection should remain fixed well in the end of the cylindrical PVC sleeve, whereas in another end there stays a cavity of approximately 3 mm deep in which is placed the conducting composite and the permanent magnet. 

As the formation of disulfide bridges between proximate cysteine residues plays a particularly important role in physical properties of wool, any reagents or conditions that interfere with these bonds will have a significant effect on the fibres. A particular and related problem associated with the deterioration of wool fibres is the release of volatile sulfur compounds, which may then attack adjacent materials many of the silver-containing metal threads found on the Tree of Jesse tapestry show signs of surface corrosion, in the form of silver sulfide. 

If jacket is not available, solder or securely fasten two wires to bulb—one on metal threads at side and other at metal contact on bottom. 

Figure L Principle of the hypothetical multi-threading reaction. The coordinating fragments are indicated in thick line. The assembling metal centre is a black circle, (a) the well established quantitative threading of a monochelate with formation of a precursor to various catenanes [2] (b) and (c) possible generalisation of the reaction to multi-metallic threaded systems.

Lame Vla- ma, la- [F] (1922) n. A fabric woven with flat metal threads, usually silver or gold, that form either the background or the pattern. 

Starter strip n. In the coil coating industry, a length of metal threaded through a line after shutdown. This is used repeatedly to attach new strip to be coated. 

AB for thread forming screws, type BF or BT/25 for thread cutting screws. These screws provide for more plastic between each metal thread than most of the other types. Specially designed screws for plastics are also available. 

Though woven fabric was the lifeblood of almost all aerospace structures until the 1930s, since then its use has fallen dramatically, replaced by sheet metal. Now that has been replaced by straight fiber (tow) lay-up into load-bearing patterns. The only woven carbon fiber fabric used extensively today is in the impact or penetration protection system applied to the outside of virtually all laid-up panels and by virtue of its crimped woven form, nonload bearing. This fabric sometimes contains metal threads to assist in lightning conduction as well as other electrical shielding functions. 

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