The Thompson-Houston System of Electric Lighting

Chapter 21: Footnotes

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About This Book

A concise technical account explains a contemporary electric lighting system by tracing dynamo development and contrasting it with older heat engines, outlining electromagnetic principles (including Faraday’s induction and Lenz’s law), and describing dynamo and motor operation. It examines practical system components — generators, lamps, regulators and conductors — discusses arc-light practice and motor use on lighting circuits, and supplements theory with plant observations, diagrams, historical notes on invention, and commentary on the interplay between practical engineering and electrical theory.

Footnotes

1. The foregoing statement is quoted from Dr Urbitzkany’s work “Electricity in the Service of Man.”

2. Gravity does not enter, as a current is generated in lowering A.

3. Each segment is really only 115° in length but the brushes are set at a distance from the holder far enough to just reach over the five degree gap by the gauge above described.

4. An arc light is a light produced by the use of the voltaic arc, which is made by the sparks passing between two poles of a powerful battery which are brought together and then seperated a little.