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This small device allowed the dimmer to be installed in a standard electrical wall box while saving energy. [2] [3] In 1966, Eugene Alessio patented a light bulb socket adapter for adjusting a light level on a single light bulb using a triac. To house this device, he decided on a 2-inch round device with one end capable of being screwed into a ...
Trickle chargers also sometimes connect in this way, eliminating the need to leave a vehicle's hood open, as well as eliminating the possibility of reversed polarity. Most cars nowadays are designed with a battery-negative earthing system and therefore have a +12V positive power distribution.
In 1927 the foot-operated dimmer switch or dip switch was introduced and became standard for much of the century. 1933–1934 Packards featured tri-beam headlamps, the bulbs having three filaments. From highest to lowest, the beams were called "country passing", "country driving" and "city driving".
A heat lamp is an incandescent light bulb that is used for the principal purpose of creating heat. The spectrum of black-body radiation emitted by the lamp is shifted to produce more infrared light. Many heat lamps include a red filter to minimize the amount of visible light emitted.
Modern switch for Normal, Blackout and Convoy modes Military vehicles that are equipped with blackout lights have a special switch for controlling the lights that are on the vehicle. This switch serves the purpose of preventing the headlights or any other lights on the vehicle from being turned on by accident, by means of a lock that is on the ...
The Mercedes-Benz W220 was a range of flagship sedans which, as the fourth generation Mercedes-Benz S-Class, replaced the W140 S-Class after model year 1998 — with long and short wheelbase versions, performance and luxury options; available four-wheel drive; and a range of diesel as well as gas/petrol V6, V8, and V12 engines.