Search results
Results from the WOW.Com Content Network
The Hungarian engineer Dénes Mihály patented an image scanning with line deflection, in which each point of an image is scanned ten times per second by a selenium cell. August Karolus (1893–1972) invents the Kerr cell, an almost inertia-free conversion of electrical pulses into light signals. He was granted a patent for his method of ...
It is parted into ten periods, starting with early experiments "prior to those of Mr. Hawkesbee", finishing with variable experiments and discoveries made after Franklin's own experiments. The book takes Franklin's work into focus, which was criticised by contemporary scholars, especially in France and Germany. [ 4 ]
In 1600, the English scientist, William Gilbert extended the study of Cardano on electricity and magnetism, distinguishing the lodestone effect from static electricity produced by rubbing amber. [7] He coined the Neo-Latin word electricus ("of amber" or "like amber", from ήλεκτρον [ elektron ], the Greek word for "amber") to refer to ...
Also note that this image may not be in the public domain in the 9th Circuit if it was first published on or after July 1, 1909 in noncompliance with US formalities, unless the author is known to have died in 1953 or earlier (more than 70 years ago) or the work was created in 1903 or earlier (more than 120 years ago.)
History of electricity can refer to: See Electricity § History for an overview; History of electromagnetic theory; History of electrical engineering; History of electric power transmission; History of electronic engineering
Streetcars created enormous demand for early electricity. This Siemens Tram from 1884 required 500 V direct current, which was typical. Much of early electricity was direct current, which could not easily be increased or decreased in voltage either for long-distance transmission or for sharing a common line to be used with multiple types of electric devices.
The war of the currents was a series of events surrounding the introduction of competing electric power transmission systems in the late 1880s and early 1890s. It grew out of two lighting systems developed in the late 1870s and early 1880s; arc lamp street lighting running on high-voltage alternating current (AC), and large-scale low-voltage direct current (DC) indoor incandescent lighting ...
The Electricity (Supply) Act 1928 made minor amendments to the 1919 Act 1931 The Electricity (Supply) Act (Northern Ireland) 1931. Created a state-appointed Electricity Board for Northern Ireland. 1932 Construction of the 132 kV crossing over the River Thames between Dagenham and Woolwich. The 487 ft (148 m) towers were then the tallest in the ...