Electricity has been shaped by two rival ideas that have taken turns defining our world. Alternating current, or AC, became the backbone of industrial civilization, while direct current, or DC, ...

With the breakthrough provided by Tesla's patents, a full-scale industrial war erupted. At stake, in effect, was the future of industrial development in the United States, and whether Westinghouse's ...

Northrop Grumman has patented a system for degaussing magnetized structures. The system uses alternating current to induce a decaying magnetic field, converting the structure into a degaussed state.

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. No extant maker's markings. This ...