Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 192
led into the rings by means of carbon brushes,the number of brushes being such that the current density at the rubbing contact is keptwithin conservative limits. At least two brushes per ring are always provided so thatone can be removed for inspection without interrupting the exciting current. In… … -- Ques. Whatspecial provi-sion is made forcooling thebearings? Ans. They are:>me casesr cooled TurbineDriven Alterna-tors.— Althoughthe principle ofoperation of thesteam turbineand that of thereciprocating en-gine are decidedlyunlike, the prin-ciple of operationof the high speedturbine driven…
Electrical engineering
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-45-6.webp)
