Electric arcs Reference Libraries
A mercury arc valve converts high-voltage or high-current alternating current into direct current. It is an electrical rectifier often used to provide power for industrial motors, electric railways, streetcars, and electric locomotives. Peter Cooper Hewitt, in 1902, invented the mercury arc rectifier. It was further developed by researchers throughout the 1920s and 1930s. Prior to...
- A small wooded valley; a dell.
- The protecting weather-shed built around the entrance to a house.
- The roofed-over space between the kitchen and the sleeping-quarters in a logging-camp, commonly used as a storeroom.