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The toggle light switch was invented in 1916 by William J. Newton. [2] As a component of an electrical wiring or home wiring system, the installation of light switches is regulated by some authority concerned with safety and standards. In different countries the standard dimensions of the wall mounting hardware (boxes, plates, etc.) may differ.
George Izenour made the next breakthrough in 1969 with the first ever fixture to use a mirror on the end of an ellipsoidal to redirect the beam of light remotely. In 1969, Jules Fisher, from Casa Mañana area theatre in Texas saw the invention and use of 12 PAR 64 lanterns with 120 W, 12 V lamps fitted, 360 degrees of pan and 270 degrees of ...
High-voltage switches are available for the highest transmission voltages, up to 1 million volts. This switch is gang-operated so that all three phases are interrupted at the same time. Knife switches consist of a flat metal blade, hinged at one end, with an insulating handle for operation, and a fixed contact.
Dimmer light switch with RF-based remote control [1] A wireless light switch is a light switch that commands a light or home appliance to turn itself off or on, instead of interrupting the power line going to the light fixture. There are different ways to communicate between the switch and the fixture: [2]
This may include high efficiency fixtures and automated controls that make adjustments based on conditions such as occupancy or daylight availability. Lighting is the deliberate application of light to achieve some aesthetic or practical effect (e.g. illumination of a security breach).
Switch 8800 - 7-, 10- and 14-slot configurations with optional dual load-sharing fabric modules. Of total slots, two reserved for fabrics. Backplane capacity 1.44 Terabit-per-second. Up to 48 10 Gigabit ports or 576 Gigabit ports, with optional PoE. Switch 7900E - 4-, 5-, 8-, and 12-slot configurations with optional dual fabric modules.