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2. Multiway switching - Wikipedia

   en.wikipedia.org/wiki/Multiway_switching

   In contrast to a simple light switch, which is a single pole, single throw (SPST) switch, multiway switching uses switches with one or more additional contacts and two or more wires are run between the switches. When the load is controlled from only two points, single pole, double throw (SPDT) switches are used.

3. Helly Hansen - Wikipedia

   en.wikipedia.org/wiki/Helly_Hansen

   Helly Hansen (HH) is a Norwegian manufacturer and retailer of clothing and sports equipment, owned by the Canadian retail chain Canadian Tire and operated as a subsidiary. Currently headquartered in Oslo , it was previously headquartered in Moss, Norway , from its founding in 1877 until October 2009.

4. Variations in traffic light operation - Wikipedia

   en.wikipedia.org/wiki/Variations_in_traffic...

   In Regina, Saskatchewan, left-turn signals are designated by a two-bulb light configuration with one (or two) red balls and one LED bimodal arrow. [17] [better source needed] When a left-turn cycle begins the red ball will change to a flashing green arrow to permitted all traffic turning left. When the left-turn cycle ends the flashing green ...

5. 3-way lamp - Wikipedia

   en.wikipedia.org/wiki/3-way_lamp

   A 3-way lamp, also known as a tri-light, is a lamp that uses a 3-way light bulb to produce three levels of light in a low-medium-high configuration. A 3-way lamp requires a 3-way bulb and socket, and a 3-way switch. In 3-way incandescent light bulbs, each of the filaments operates at full voltage. Lamp bulbs with dual carbon filaments were ...

6. Pull switch - Wikipedia

   en.wikipedia.org/wiki/Pull_switch

   The most common use of a pull switch is to operate a ceiling electric light.The ceiling fan and mechanical wall fans are also appliances often operated by pull switches. . Pull switches may be either two-position (open or closed) or multi-position (allowing for different fan speeds or levels of illuminati

7. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   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]

8. Bell 204/205 - Wikipedia

   en.wikipedia.org/wiki/Bell_204/205

   The 204 was a giant step forward in helicopter design, being one of the first to be powered by a turboshaft. The turboshaft engine radically improved the practicality of the helicopter due to its light weight and high power-to-weight ratio, lower fuel consumption, and lower maintenance and operating costs. The use of a turboshaft in the 204 ...

9. Symphony No. 2 (Hanson) - Wikipedia

   en.wikipedia.org/wiki/Symphony_No._2_(Hanson)

   The Symphony No. 2 in D-flat major, Op. 30, W45, [1] "Romantic", was written by Howard Hanson on commission from Serge Koussevitzky for the 50th anniversary of the Boston Symphony Orchestra in 1930, [2] and published by Carl Fischer Music.