File:Telephones and telegraphs- 1902 - (and Municipal electric fire alarm and police patrol systems) (1906) (14753126821).jpg

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English:

Identifier: cu31924022817674 (find matches)
Title: Telephones and telegraphs: 1902 : (and Municipal electric fire alarm and police patrol systems)
Year: 1906 (1900s)
Authors: United States. Bureau of the Census Steuart, William Mott, 1861- Martin, Thomas Commerford, 1856-1924 Abbott, Arthur Vaughan, 1854- Mayer, William
Subjects: Telephone Telegraph Fire alarms
Publisher: Washington : Govt. Print. Off.
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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phce, the ends are dressed down, and the sleeveis soldered to the respective sheaths. Telephone cables terminate usually either at acentral office or upon an open wire distributing pole.At the end of the cable the conductors must be broughtout. There are two devices for accomplishing this,the cable head and the pot head. The former con-sists of a rectangular iron box, having at one end abrass pipe to which the sheath of the cable is solderedand through which the conductors pass to the insideof the head. The sides of the head are provided withbinding posts, which project, air tight, through thesides. After each conductor is run to its appropriatebinding post and soldered, the head cover is screweddown upon a rubber gasket, sealing the cable. Thepot head is the cheaper device. It is made by splic-ing a short handmade cable to the cable in the man-ner already described. To prevent moisture fromentering the cable, the sleeve is made somewhatlonger, the pot head is set on end and heated to
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TELEPHONE CONDUITS NEAR STREET RAILWAY TRACK.

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27 July 2014

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