| 摘要 |
In a leading-in arrangement of cathode leads (85, 86) connecting with the cathode filament (68) which is placed along the center line of an evacuated external case (50) forming part of a cylindrical anode (51) of a magnetron, a magnet pole (77) has a vertical hole (75) along the center line and a horizontal hole (76) connected at right angles with the vertical hole and the cathode leads are taken in through these holes. By means of this leading-in arrangement a cylindrical permanent magnet (73) made from a material of alnicos is located in a magnetic circuit. The cylindrical anode (51) consists of a moulded member having cylindrical parts of smaller (54) and greater (55) diameters. An output (64) and an input (65) are attached to the side of the cylindrical part with the greater. If, as preferred, the permanent magnets (71, 73) are placed in hollows on the outside of the case and furthermore are placed in inside the yokes (72, 74) for the magnetic circuit, a magnetic force can be obtained inside the case while the magnets themselves are located outside. |
