Metals Metal 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. 

Nord, A. G. and K. Tronner (2000), A note on the analysis of gilded metal embroidery threads, Stud. Conserv. 45(4), 27A-279. 

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-... 

A number of helical and double-helical complexes have been obtained with polypyridine ligands, which bind various metal ions yielding helical and double-helical [9.70-9.74] complexes that present interesting redox and metal-metal interaction properties [9.75]. The graphs of the double-helicates represent braids based on two threads and several crossings [9.1,9.76], that may serve as templates for the synthe-... 

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],... 

Chambron, Jean-Claude, Rotaxanes From Random to Transition Metal-templated Threading of Rings at the Molecular Level, 5, 225. 

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... 

IV. Transition-Metal-Controlled Threading A New Principle of Rotaxane Synthesis... 

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. 

---