File:Investigation of the aluminum cell - the rectifier (1913) (14743442646).jpg

Identifier: investigationofa00sees (find matches)
Title: Investigation of the aluminum cell : the rectifier
Year: 1913 (1910s)
Authors: Seese, Robert St. Clare
Subjects: Aluminum cell Electric current rectifiers Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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ation♦ shown in Fig. 4, which is a light- ning arrester designed hy thewriter for the Clinton (la.) Street Bailway Co. It is intendedto meet unusually severe storm conditions due to the peculiartopography of the country, and is therefore equipped with anelectrolyte which gives a remarkably strong and lasting film.( The curve A is drawn from data on a cell containing electro-lyte furnished hy the American Battery Co. for small rectifiersthe chemical composition being mentioned later.) There are other factors which must he consideredwhen investigating the properties of the film. The conditionand kind of electrolyte, the condition of the electrodes, thetemperature of the cell are all important. The best conditionis reached when the film may he very quickly formed, or dis-solved, at the end of the respective half-cycles. Anythingwhich prevents the rapid formation of the film or hinders itsdissolution must therefore he carefully guarded against. The Line. (b.^ Wiring diagram of arrester.
Text Appearing After Image:
(b) Arrester with cover removed., (o) Arrester on pole for test.Fig- 4. Aluminium lightning arrester for 750 volt trolley,equipped with electrolyte giving especially durable gas film. 7 effects of temperature changes and foreign material in a cellare well known, and need no further explanation.The Film Unit. So far we have considered only the most simple andfundamental part of the aluminium cell: an aluminium electrode,its film, and the electrolyte immediately surrounding it. Weshall for convenience call this portion of the cell a filmunit, for some cells have several film units, and in the morecomplicated cells it is sometimes difficult to distinguish be-tween the actual film unit and the auxiliary parts. He havein the preceding paragraphs endeavored to show that the actionof the cell depends entirely on the film unit, and have ex-plained what is now believed to he the true theory of the valveaction. lie may now study the application of this peculiarproperty to a complete cell, and t

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