Serially connected course and fine inductors with continuous adjustment

Claim 1

A TUNING MECHANISM FOR A VARIABLE FREQUENCY OSCILLATOR COMPRISING A SHIELDING CONTAINER INCLUDING A FRONT PANEL, HAVING A CLOSABLE ACCESS OPENING THEREIN, A MAIN INDUCTANCE ELEMENT DISPOSED WITHIN SAID SHIELDING CONTAINER, A ROTATABLE THREADED SHAFT EXTENDING ALONG A PRESELECTED AXIS THROUGH SAID CONTAINER, SAID MAIN INDUCTANCE ELEMENT INCLUDING A COIL MEMBER RIGIDLY FIXED WITHIN SAID CONTAINER AND A CORE MEMBER THREADEDLY COUPLED TO SAID THREDED SHAFT WITHIN SAID CONTAINER, SAID CORE MEMBER BEING MOVED ALONG SAID AXIS IN TELESCOPING RELATION TO SAID COIL MEMBER IN RESPONSE TO RELATIVE ROTATION BETWEEN SAID CORE MEMBER AND SAID THREADED SHAFT TO VARY THE INDUCTANCE OF SAID INDUCTANCE ELEMENT AND VRY THE FREQUENCY OF THE OSCILLATOR CONSISTENTLY AND CONTINUOUSLY THROUGH A ELECTED RANGE AT A PREDETERMINED RATE, GUIDE MEANS FOR HOLDING SAID CORE MEMBER AGAINST ROTATION ABOUT THE AXIS OF SAID SHAFT, ROTATABLE MEANS EXTENDING EXTERNALLY OF SAID CONTAINER FOR ROTATING SAID THREADED SHAFT IN PRESELECTED RELATION TO ROTATION OF SAID EXTERNAL ROTATABLE MEANS, A COMPENSATING INDUCTANCE ELEMENT INTERCOUPLED IN CIRCUIT RELATION WITH SAID MAIN INDUCTANCE ELEMENT TO VARY THE CUMULATIVE INDUCTANCE OF SAID ELEMENTS, SAID COMPENSATING INDUCTANCE ELEMENT INCLUDING A RIGIDLY MOUNTED COIL AND AN AXIALLY MOVABLE TUNING SLUG, A CAM PLATE INTERCOUPLED WITH SAID THREADED SHAFT FOR COORDINATE ROTATION WITH SAID THREADED SHAFT, SAID CAM PLATE HAVING A PLURALITY OF ADJUSTING SCREWS DISPOSED ON A CIRCULAR PATH CONCENTRIC WITH THE AXIS OF THE CAM PLATE, EACH OF SAID ADJUSTING SCREWS HAVING A HEAD PORTION FORMING A WORKING CAM SURFACE AND A SLOTTED PORTION DISPOSED TO BE PRESENTED TO THE ACCESS OPENING IN SAID FRONT PANEL TO PERMIT AXIAL ADJUSTMENT OF THE POSITION OF SAID WORKING HEAD PORTION BY A TOOL PROJECTED THROUGH SAID ACCESS OPENING INTO ENGAGEMENT WITH SAID SLOTTED PORTION, A CAM FOLLOWER MEMBER HAVING A CAM FOLLOWER NOSE BIASED TOWARD SAID WORKING CAM SURFACES OF SAID ADJUSTING SCREWS FOR TRANSMITTING MOTION TO SAID TUNING SLUG OF SAID COMPENSATING INDUCTANCE ELEMENT TO VARY THE LONGITUDINAL POSITION OF SAID TUNING SLUG AND THUS THE INDUCTANCE OF SAID COMPENSATING INDUCTANCE ELEMENT IN ACCORDANCE WITH THE AXIAL ADJUSTED PORTION OF SAID ADJUSTING SCREWS, THE ROTATION OF SAID CAM PLATE, THE CIRCUMFERENTIAL SPACING OF THE ADJUSTING SCREWS, AND THE CONFIGURATION OF THE CAM FOLLOWER NOISE BEING SUCH AS TO CONTINUOUSLY ADJUST THE COMPENSATING INDUCTANCE ELEMENT TO PRODUCE CUMULATIVE INDUCTANCE VARIATION OF SAID INDUCTANCE ELEMENT PRODUCING A CONSTANT FREQUENCY CHANGE CHARACTERISTIC IN ACCORDANCE WITH A FREQUENCIES. FUNCTION THROUGHOUT THE SELECTED RANGE OF FREQUENCIES.