One of the patents Tesla filed in 1887, however, also described a shorted-winding-rotor induction motor. George Westinghouse promptly bought Tesla's patents, employed Tesla to develop them, and assigned C. F. Scott to help Tesla; however, Tesla left for other pursuits in 1889.               The constant speed AC induction motor was found not to be suitable for street cars,  but Westinghouse engineers successfully adapted it to power a mining operation in Telluride, Colorado in 1891.   
To ensure that the full aroma of the espresso can be unlocked, the coffee must be prepared at the right brewing temperature. The ideal brewing temperature for a perfect espresso is between 90°C and 95°C. If the temperature is too low, only some of the flavour is released from the coffee. If the temperature is too high, the coffee will quickly acquire a burnt taste. EQ fully automatic coffee machines with the sensoFlow System—the only system of its kind in the world—always heat the water to the right temperature and maintain this temperature throughout the entire brewing process — professional technology that guarantees you a professional espresso.