US172495A - Improvement in insulating telegraph-wires - Google Patents

Improvement in insulating telegraph-wires Download PDF

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US172495A
US172495A US172495DA US172495A US 172495 A US172495 A US 172495A US 172495D A US172495D A US 172495DA US 172495 A US172495 A US 172495A
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wires
telegraph
improvement
air
insulating
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1873—Measures for the conductors, in order to fix the spacers

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  • My invention relates to an improved system for utilizing compressed air as an auxiliary in the management of railways and electric telegraphs. It consists in the combination of one or more telegraph wires or cables with a pipe charged with compressed air, the object of my invention being to insurea more perfect insulation of the wires, and their complete protection from atmospheric disturbances.
  • A represents a pipe, or section of pipe, charged with compressed air, and inclosing a telegraph-wire, B.
  • a A a continuous line of pipes, A A, is laid between the points which are to be connected by the telegraph, or where especial protection of the wire B is deemed important and advisable.
  • the pipes are so connected as to form practically an extended air-tight vessel, and a suitable air pump or compressor is combined therewith, and operated to fill the same with air under pressure, and to maintain such pressure therein.
  • I claim as my invention- The combination, substantially as herein set forth, of one or more telegraph wires or cables, with a continuous line of air-tight inclosing pipes charged with atmospheric air under compression.

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  • Laying Of Electric Cables Or Lines Outside (AREA)

Description

w. E. PRALL.
INSULATING TELEGRAPH WiRE. N0.17Z,495. Patented Jan 18,1876.
PATENT OFFICE,
UNITED STATES WILLIAM E. PRALL, OF WASHINGTON, D, (3., ASSIGNQR T O PRALL RAILWAY SIGNAL AND TELEGRAPH COMPANY, OF NEW YORK, N. Y.
IMPROVEMENT IN INSULATING TELEGRAPH-WIRES.
Specification forming part of Letters Patent No. 172,496, dated January 18, 1876; application filed December 20, 1873.
To all whom it may concern:
Be it known that I, WILLIAM E. PRALL, of Washington, District of Columbia, have invented an Improved Method of Protecting Telegraphic Wires, of which the following is a specification:
My invention relates to an improved system for utilizing compressed air as an auxiliary in the management of railways and electric telegraphs. It consists in the combination of one or more telegraph wires or cables with a pipe charged with compressed air, the object of my invention being to insurea more perfect insulation of the wires, and their complete protection from atmospheric disturbances.
In the accompanying drawing, A represents a pipe, or section of pipe, charged with compressed air, and inclosing a telegraph-wire, B.
In carrying my invention into practice, a continuous line of pipes, A A, is laid between the points which are to be connected by the telegraph, or where especial protection of the wire B is deemed important and advisable. The pipes are so connected as to form practically an extended air-tight vessel, and a suitable air pump or compressor is combined therewith, and operated to fill the same with air under pressure, and to maintain such pressure therein.
In practice, a compression of the air to two atmospheres will be found efficient; but as the properties of air as a non-conductor for the electrical current increase with its compression, it will be found preferable to maintain the compression at several atmospheres, especially as the pipes used for inclosing the wires may be utilized as a reservoir from which the compressed air may be drawn for use as a motive power for various purposes, such as the movement of signals along a line of railway, the elevation of water for the supply of the locomotives upon the road, 860.
I do not claim as new the combination of one or more telegraph-wires with a continuous line of pipes inclosing and protecting the same, my invention relating solely to the protection of the wires by surrounding them'with, or inclosing them within, an envelope of confined or compressed air. 7
I claim as my invention- The combination, substantially as herein set forth, of one or more telegraph wires or cables, with a continuous line of air-tight inclosing pipes charged with atmospheric air under compression.
W. E. PBALL.
Witnesses DAVID A. BURR, RoBr. Gr. LOUGHERY.
US172495D Improvement in insulating telegraph-wires Expired - Lifetime US172495A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030202783A1 (en) * 2002-04-30 2003-10-30 Samsung Electronics Co., Ltd Combo system and method capable of restoring operation conditions based on electric power re-supply
US20040078357A1 (en) * 2002-10-16 2004-04-22 Microsoft Corporation Optimizing media player memory during rendering
US20040243727A1 (en) * 2003-06-02 2004-12-02 Chung Keicy K. Computer storage device having network interface

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030202783A1 (en) * 2002-04-30 2003-10-30 Samsung Electronics Co., Ltd Combo system and method capable of restoring operation conditions based on electric power re-supply
US20040078357A1 (en) * 2002-10-16 2004-04-22 Microsoft Corporation Optimizing media player memory during rendering
US20040243727A1 (en) * 2003-06-02 2004-12-02 Chung Keicy K. Computer storage device having network interface

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