GEAR FOR FREQUENCY TUNING OF SHF DEVICES Russian patent published in 1999 - IPC

FIELD: electronics. SUBSTANCE: invention is related to field of electronic SHF devices to re-tune frequency of small-sized SHF devices such as magnetrons operating in several definite frequency channels. Proposed gear has case, shaft, spring-loaded rod coupled to tuning elements and fixation mechanism. Shaft is placed between two supports in the form of rings located in case. Central part of shaft carries disc made fast to it and having two grooves as minimum in external side surface along shaft axis where inserts independent one from another are mounted for axial movement and successive interaction at moment of fixation with rod and changing distance from rotation axis of shaft to point of contact with rod. Fixation mechanism is located on side of surface of insert facing rod at moment of fixation. Fixation mechanism is manufactured in the form of rod on which butt bushing in the form of rolling-contact bearing interacting with inclined surfaces of grooves made in surface of each insert facing rod is mounted for rotation. Lever which one side carries axle anchored immobile in case and on which other side bushing, for instance, in the form rolling-contact bearing interacting with insert is put is installed in addition in groove of case between disc and rod. . Rod in this case contacts butt of lever. EFFECT: increased accuracy of tuning of device to required frequency thanks to reduced deformation of shaft under action of load from side of rod. 2 cl, 4 dwg