Nicholas Lodge and other equipment for the home economics department. Lodge traveled to the United States in the 1980s to demonstrate at the International Cake Exploration Societé (ICES) convention. At the time, most American cakes were covered with thick buttercream icing. Many of the students in Lodge's classes had never seen the techniques he was using to decorate cakes with royal icing and rolled fondant. Feeling like the cake decorating field had become saturated in England, Lodge decided to move to the United States and teach classes on cake decorating. During a two-week class in Atlanta, Georgia, he decided to make the
Induction cooking 24 kHz. Such high frequencies are not feasible with inexpensive power semiconductors; in 1973 the silicon-controlled rectifiers used were limited to no more than 40 kHz. Even a thin layer of copper on the bottom of a steel cooking vessel will shield the steel from the magnetic field and make it unusable for an induction top. Some additional heat is created by hysteresis losses in the pot due to its ferromagnetic nature, but this creates less than ten percent of the total heat generated. New types of power semiconductors and low-loss coil designs have made an all-metal cooker possible. Panasonic