Excerpt from Telephony: A Manual of the Design, Constructions, and Operation of Telephone Exchanges, in Six Parts, Part II. Construction of Underground Conduits, With 62 Illustrations
The art of Conduit building may be considered to owe its inception and development to the Telephone Exchange, for electric light and power circuits would have encumbered city streets much longer had it not been for the phenomenal increase in overhead wires necessitated by the telephone. When telephonists solved the problem of the underground circuit and buried their lines, other circuits of all descriptions were compelled to follow; and to Telephone Engineers, as conduit builders, the improved appearance of city streets owe a huge debt of gratitude. As with other inventions, the successful conduit has been a struggle for the survival of the fittest. During the past two decades plan after plan for underground circuits has appeared, lived for a time, and died; but gradually, from the ruins of failure, a system of Conduit building has arisen which has successfully withstood the severe test of more than a decade beneath the streets.
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Anbieter: Forgotten Books, London, Vereinigtes Königreich
Paperback. Zustand: New. Print on Demand. This book is a comprehensive guide to the design, construction, and operation of underground conduits for telephone exchanges, providing a detailed analysis of the various types of conduits and their respective advantages and disadvantages. The author covers historical context and technological advancements in conduit building, discussing materials such as wood, cement, vitrified clay, and asphalted wood-pulp, examining their resistance to moisture, gas, and external forces. The book explores the engineering principles behind conduit construction, including excavation, duct installation, protection from external damage, and restoration of the surrounding environment. It also delves into the intricacies of manhole design, emphasizing strength, durability, moisture-proofing, and ease of cable access. The author provides practical insights and best practices for efficient and reliable conduit building, making this book an indispensable resource for engineers and telecommunications professionals. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Bestandsnummer des Verkäufers 9781332315154_0
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Anbieter: PBShop.store US, Wood Dale, IL, USA
PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000. Bestandsnummer des Verkäufers LW-9781332315154
Anbieter: PBShop.store UK, Fairford, GLOS, Vereinigtes Königreich
PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000. Bestandsnummer des Verkäufers LW-9781332315154
Anzahl: 15 verfügbar