Electrical Instruments and Telephones of the U. S. Signal Corps (Classic Reprint) - Softcover

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Excerpt from Electrical Instruments and Telephones of the U. S. Signal Corps

In view of the changed condition of affairs it is in the interests of economy and efficiency to consolidate the two manuals. In so doing the greater part of the valuable publications of Majors Reber and Russel have remained unchanged. Major Russel, in his revision of the work along lines designated by the Chief Signal Officer of the Army, has been assisted by Mr. R. A. Klock and other members of the electrical staff of the Signal Corps.

The data regarding electrical instruments of the Signal Corps have heretofore been widely scattered, some in technical publications, where it was associated with much not immediately useful to the Sig nal Corps electricians and operators, and some in separate publica tions, drawings, and documents filed in the office of the Chief Signal Officer of the Army.

Practical experience with telegraph apparatus under the severe tests imposed by tropical field conditions, supplemented by over a year's observations in the central telegraph office at Manila, P. I., emphasized the necessity of eliminating some old appliances and the adoption of modern improvements suitable for military telegraphy.

Many of the details of the storage battery switchboard connections were worked out by the Signal Corps in the Manila office.

The voltmeter-milliammeter method of testing, while not new, was, it is believed, given an unusually prolonged and constant use in the Philippines to determine its fitness for tropical as well as ordinary service conditions.

Much of the other matter in the chapter on Testing and location of faults is new, and includes the application of the ohmmeter to line-testing by methods suggested and put into practice by Mr. Rob ert C. Lord. The importance of regular tests, and full records thereof, at offices is so great that this practice can not be too strongly enjoined, not only as insuring Uniformly excellent working condi tions, but also as a means of training men in the intelligent use of their instruments.

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