Energy supply structure for combined resistance heater for H. F. heater oven

A heating appliance comprising:

• a heating chamber for heating objects to be disposed therein and having a top wall, a bottom wall, a rear wall, and opposing side walls;
• an energy feeding port extending through one of said walls;
• a high frequency oscillator for generating high frequency radiation energy;
• a waveguide extending from said oscillator to said energy feeding port;
• a rotary antenna extending through said energy feeding port for directing high frequency energy into said heating chamber;
• a drive means being connected to said rotary antenna for rotating said antenna;
• a non-high frequency type heater means being disposed within said heating chamber and being substantially parallel with the wall which said energy feeding port extends therethrough;
• said rotary antenna being substantially L shaped and having a longitudinal leg and a lateral leg, said longitudinal leg being extended from said waveguide, through said energy feeding port, and into said heating chamber;
• said lateral leg being connected to said longitudinal leg within said heating chamber and at a point intermediate the end of the longitudinal leg within said heating chamber and the portion of said longitudinal leg which is adjacent to said energy feeding port, and the portion of said longitudinal leg within said heating chamber being of a longitudinal length substantially equal to one quarter of the wavelength of the high frequency energy generated by said oscillator;
• and
• the portion of said rotary antenna situated within said heating chamber being located within the space defined between said heater means and the wall which said energy feed port extends therethrough.