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[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 light bulb socket and the other end able to receive a light bulb. [4]
Aladdin Industries filed key "Aladdin Lamps" patents in 1954 and 1956, [1] [2] and commercial models were available by 1955. [3] However, due to low electrical efficiency and high price of the vacuum tube-based product, the concept was not popularized until later versions of the touch mechanism used integrated circuits and transistors to improve efficiency and reduce cost in the mid 1980s.
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.
At the beginning of 1950, Kraus & Naimer cam switches C30 (30A) were followed with the same design. The Kraus & Naimer cam switches C16 to C200, which came into the market in the spring of 1951, had a decisive influence on the advancement of the cam switch and the introduction of the roller switch in electrical engineering.
In building wiring, multiway switching is the interconnection of two or more electrical switches to control an electrical load from more than one location.A common application is in lighting, where it allows the control of lamps from multiple locations, for example in a hallway, stairwell, or large room.
Group 2 (Only for use in signalling lamps, cornering lamps, reversing lamps and rear registration plate lamps) Category Cap (Base) Filaments Nominal Power (Major/Minor where applicable) Comments Image C5W SV8.5 1 6 V, 12 V, 24 V: 5 W [5] ECE nominal luminous flux: 45 lm ± 20%; Old designation: C11, common name is "festoon" base H6W BAX9s 1 12 ...