File:How to make inventions; or, Inventing as a science and an art (1893) (14781025114).jpg

Identifier: howtomakeinventi01thom (find matches)
Title: How to make inventions; or, Inventing as a science and an art
Year: 1893 (1890s)
Authors: Thompson, Edward P
Subjects: Inventions
Publisher: New York, D. Van Nostrand co
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
obefore the poles of the field magnet; To vary the pressure existing between the two carbon ormetallic or conducting-liquid electrodes normally and abnor-mally in contact with each other; Same, the number of the electrodes of one or both polaritiesbeing increased; Same, one of the electrodes, when metallic or carbon, beingpulverized; Same, in which one of the electrodes is a valve, looselylocated upon the end of a tube which is the other electrode. To vary the pressure upon the plates of a voltaic pile, analternate increase and decrease of distance between the plates,causing variable amounts of current generated; To vary the shape of a globule of mercury balanced in aconducting liquid, the vibrations of the better conductor, mer-cury, varying the resistance of the circuit; 136 To vary the static charge of condenser plates,; whereby theelectric current of the line becomes varied as to its electromotive fnrrp memessMin^ Building an idea or invention on paper is an^instructive ele- .^^-^
Text Appearing After Image:
ment, as it shows up the defects to be remedied, calls for com-pleteness of conception of important details, and may^etermine 137 the question of operativeness. It is almost like building a model,but is greatly cheaper and much more easily accomplished.When the sketches are made, the inventor should draw up adetailed, but concentrated written description, which may bekept in a record book. Such a record has proved very valuableto inventors whose cases come before the courts. Inspectionwill show that the description consists of three parts ; namely, /^^J^

Note About Images