Abstract:
A stereophonic sound reproducing system having left and right audio transducer means arranged relatively close to each other, and a combiner means connected to a stereophonic sound signal source for generating left and right signals R and L and combining the left and right signals R and L to produce a combined left sound signal L- gamma R and a combined right sound signal R- gamma L ( gamma representing a complex number coefficient). These combined sound signals L- gamma R and Lgamma R are fed to the left and right sound transducer means, thereby stereophonic sound is reproduced.
Abstract:
An electron tube having at least two electrodes and a cathode disposed within an evacuated envelope. One of the electrodes is spaced generally transversely with respect to the electro beam path from the cathode to the other electrode. The electrode which is spaced from the electron beam path is used to control the cathode current. Means are provided to couple various voltages to the respective electrodes to accomplish the desired control. The anode electrode may have a phosphor coating thereon so as to glow when bombarded by an electron beam from the cathode. Accordingly, an electron tube of this type is adaptable to display units for the display of letters, symbols, numerals and the like. In one form of the invention, the anode electrode and the control electrodes are arranged in a predetermined pattern to cause elemental areas of the anode electrode to glow and produce a display.