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Two light switches in one box. The switch on the right is a dimmer switch. The switch box is covered by a decorative plate. The first light switch employing "quick-break technology" was invented by John Henry Holmes in 1884 in the Shieldfield district of Newcastle upon Tyne. [1]
The company was very active in the early proliferation of electric lighting, having installed Newcastle's first domestic electrical lighting into their father's house, and supplied installations throughout Europe and the British colonies, [6] making deals in the United States as well. [7] John Henry Holmes invented the quick break light switch ...
1962 Nick Holonyak Jr. develops the first practical visible-spectrum (red) light-emitting diode. 1963 Kurt Schmidt invents the first high pressure sodium-vapor lamp. [17] 1972 M. George Craford invents the first yellow light-emitting diode. 1972 Herbert Paul Maruska and Jacques Pankove create the first violet light-emitting diode.
Based in Irvine, California, Menlo Micro takes its name from the Menlo Park, New Jersey research lab where Thomas Edison patented the first light switch back in 1893 -- and the company's ties to ...
Hubbell's first design was a socket which screwed into a lampholder (like the early lampholder plugs), but with a separable plug with pins (U.S. patent 774,250) or blades (US patent 774251). The 1906 Hubbell catalog [4] shows the blade plug with a flush mounting socket for use in wall or floor. Other manufacturers adopted the Hubbell pattern ...
[37] [38] Deprez avoided transformers by placing generators and loads in series [37] as arc lamp systems of Charles F. Brush did. Thury developed this idea into the first commercial system for high-voltage DC transmission. Like Brush's dynamos, current is kept constant, and when increasing load demands more pressure, voltage is increased.
While the “Epoch of Reionization” sounds like the title of a sci-fi novel destined for a Hugo award, this very real era of the universe featured the first light from the very first stars ...
A wide variety of mechanical switch designs using slide switches, rocker switches, or side-mounted or end-mounted pushbuttons has been used in flashlights. A common combination is a slide switch that allows the light to be left on for an extended time, combined with a momentary button for intermittent use or signalling.