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Copyright Dr. Eng. Jan Pająk
Img.012 (F1abc) The evolution of the Oscillatory Chamber. Three parts of this diagram show the gradual transformation of a Henry's oscillatory circuit with a spark gap into an Oscillatory Chamber.
Img.012a (F1a) The conventional form of an oscillatory circuit with a spark gap, as it was discovered by J. Henry in 1845. Its three vital elements (i.e. capacitance "C1", inductance "L" and spark gap "E") are provided by three separate devices, i.e.: a capacitor, a coil, and a pair of electrodes.
Img.012b (F1b) The modified version of the oscillatory circuit with a spark gap. All three vital elements are concentrated in one device, i.e. a couple of conductive electrodes "PF" and "PB" joined to the inner surfaces of the two opposite walls of a cubical chamber made of an electric insulator. Both electrodes "PF" and "PB" in turn are subdivided into several separate segments "1, 2, ..., p". In the real chambers these segments will be reduced to thin conductive needles insulated from each other. The side dimension of the cube is marked by "a".
Img.012c (F1c) The Oscillatory Chamber formed by combining together two modified oscillatory circuits "C1" and "C2" identical to that presented in part (b) of this diagram. The consecutive appearance of sparks labelled as "SR-L", "SF-B", "SL-R", "SB-F" oscillating along the surface of the left-side walls creates a kind of electric arc circulating around the inner perimeter of this chamber and producing a strong magnetic field.
