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2. Allen (brand) - Wikipedia

   en.wikipedia.org/wiki/Allen_(brand)

   Originally named Allen Manufacturing Company, the business produced hexagonal set screws and wrenches to fasten them. The terms "Allen wrench" (American English) and "Allen key" (British English) [3] are derived from the Allen brand name and refer to the generic product category "hex keys". W.G. Allen [4] filed the first related patent in 1909 ...

3. Stockbridge damper - Wikipedia

   en.wikipedia.org/wiki/Stockbridge_damper

   A Stockbridge damper is a tuned mass damper used to suppress wind-induced vibrations on slender structures such as overhead power lines, [1] long cantilevered signs [2] and cable-stayed bridges. The dumbbell -shaped device consists of two masses at the ends of a short length of cable or flexible rod, which is clamped at its middle to the main ...

4. Ethan Allen (armsmaker) - Wikipedia

   en.wikipedia.org/wiki/Ethan_Allen_(armsmaker)

   Ethan Allen (September 2, 1808 – January 7, 1871) was a major American arms maker from Massachusetts. He is unrelated to the revolutionary Ethan Allen. His first firearm, the "Pocket rifle" was developed in 1836, and his first patent was granted in 1837.

5. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space. The control circuit in a household HVAC installation. The wires connecting to the blue terminal block on the upper-right of the board lead to the thermostat.

6. Harmonic damper - Wikipedia

   en.wikipedia.org/wiki/Harmonic_damper

   Harmonic balancer lower pulley on a four-cylinder engine. A harmonic damper is a device fitted to the free (accessory drive) end of the crankshaft of an internal combustion engine to counter torsional and resonance vibrations from the crankshaft. This device must be an interference fit to the crankshaft in order to operate in an effective manner.

7. Magnetorheological damper - Wikipedia

   en.wikipedia.org/wiki/Magnetorheological_damper

   Magnetorheological damper. A magnetorheological damper or magnetorheological shock absorber is a damper filled with magnetorheological fluid, which is controlled by a magnetic field, usually using an electromagnet. [1] [2] [3] This allows the damping characteristics of the shock absorber to be continuously controlled by varying the power of the ...

8. Allen-Bradley - Wikipedia

   en.wikipedia.org/wiki/Allen-Bradley

   Allen-Bradley is the brand-name of a line of factory automation equipment owned by Rockwell Automation. The company, with revenues of approximately US $6.4 billion in 2013, manufactures programmable logic controllers ( PLC ), human-machine interfaces, sensors , safety components and systems, software, drives and drive systems, contactors ...

9. Eurotunnel Class 9 - Wikipedia

   en.wikipedia.org/wiki/Eurotunnel_Class_9

   Background and design. Tendering for the locomotive procurement began in 1989. The specification included; a top speed of 160 km/h (100 mph); a terminal-to-terminal travel time of 33 minutes pulling a 2,100-tonne (2,067-long-ton; 2,315-short-ton) train; an axle load limit of 22.5 tonnes (22.1 long tons; 24.8 short tons); an operating temperature range between −10 °C (14 °F) and 45 °C (113 ...