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It has been claimed to be the first mainstream brand of blender, [1] though technically the Waring blender brand was introduced in 1937. In 1946, Oster acquired the Stevens Electric Company, which had received a patent on the liquifying blender in 1922. Oster itself was bought by Sunbeam Corporation in 1960.
A bus coupler is a device which is used to couple one bus to the other without any interruption in power supply and without creating hazardous arcs. A bus coupler is a breaker used to couple two busbars to perform maintenance on other circuit breakers associated with that busbar. It is achieved with the help of a circuit breaker and isolators.
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FK-15-10, which is compatible with the Scharfenberg type 10 coupler; metros and suburban railways: FK-9-6; streetcars and narrow gauge railcars: FK-5.5-4 and FK-3-2.5; As of 2020 Wabtec is working on an Digital automatic coupling (DAC) based the Schwab coupler, a possible replacement of the screw couplers in the European rail freight service. [33]
The rat-race coupler has four ports, each placed one-quarter wavelength away from each other around the top half of the ring. The bottom half of the ring is three-quarter wavelengths in length. The ring has a characteristic impedance of factor 2 {\displaystyle {\sqrt {2}}} compared to port impedance.