File:Electrical instruments and telephones of the U.S. Signal corps (1911) (14754160864).jpg

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Identifier: electricalinstru00unitrich (find matches)
Title: Electrical instruments and telephones of the U.S. Signal corps
Year: 1911 (1910s)
Authors: United States. Army. Signal Corps
Subjects: Military telegraph -- United States Military telephone -- United States
Publisher: Washington, Govt. print. off.
Contributing Library: University of California Libraries
Digitizing Sponsor: MSN

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ative plate with pure,or sponge lead. The theory of the chemical action of the cell isthat on charge the positive plate becomes peroxide of lead and thenegative plate becomes pure lead and on discharge both plates tendtoward the condition of lead oxide (PbO). Another theory ad-vanced is that sulphate of lead is made on both plates by dischargingand that during the charge lead peroxide (PbO.) is formed on thepositive plate and pure lead (Pb) on the negative plate, sulphuricacid beinsT set free. 28 ELFXTRICAL INSTRUMENTS U. S. SIGNAL CORPS. Ill later paragraphs on the maintenance of storage batteries em-phasis is laid on the fact that storage batteries should not be alloAvedto remain in a discharged state. This is because lead oxide immersedin sulphuric acid Avill be chemically attacked, indej^endent of anycurrent flow, and change into lead sulphate, so that discharged platestend to take on a coating of lead sulphate, a nonconductor, imparingthe efliciencv of the cell as an accumulator.
Text Appearing After Image:
Fig. 8.—Electric Storaije Battery Companys chloride ceU. Various methods of maiuifacture are used to givt- the plates morecurrent capacit)—that is, to expose more reducible peroxide of leadin the positive and spongy lead in the negative plate to the action ofthe electrolyte. The various methods of manufacture consist inchanging the form of the grids and ditferent methods of filling themwitli the oxides and spongy j^ire lead. Inasmuch as neither of thesehave any mechanical strength in themselves, the grids or frames arenecessary to nuike up a suitable electrode. ELECTRICAL INSTRUMENTS U. S. SIGNAL CORPS, 29 Different makes of sloragv batteries are used by the Signal Corps,but to date all those used are of the lead types made by the ElectricStorage Battery Company, known as the Chloride^ battery; thosemade by the Willard Storaoe Battery Company and known as the

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  • bookid:electricalinstru00unitrich
  • bookyear:1911
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:United_States__Army__Signal_Corps
  • booksubject:Military_telegraph____United_States
  • booksubject:Military_telephone____United_States
  • bookpublisher:Washington__Govt__print__off_
  • bookcontributor:University_of_California_Libraries
  • booksponsor:MSN
  • bookleafnumber:31
  • bookcollection:cdl
  • bookcollection:americana
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27 July 2014

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