Astable multivibrators with progressively varying time constants

Claim 1

A PULSE GENERATING CIRCUIT COMPRISING A FIRST AND A SECOND TRANSISTOR OF ONE CONDUCTIVITY TYPE, A THIRD TRANSISTOR OF THE OPPOSITE CONDUCTIVITY TYPE, A FIRST COUPLING CAPACITOR INTERCONNECTING THE BASE ELECTRODE OF SAID FIRST TRANSISTOR AND THE COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR, A SECOND COUPLING CAPACITOR INTERCONNECTING THE BASE ELECTRODE OF SAID SECOND TRANSISTOR AND THE COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR, A SOURCE OF ENERGIZING POTENTIAL, A FIRST TIMING DISCHARGE PATH INCLUDING THE COLLECTOR-EMITTER PATH OF SAID THIRD TRANSISTOR INTERCONNECTING THE BASE ELECTRODE OF SAID SECOND TRANSISTOR AND SAID SOURCE OF ENERGIZING POTENTIAL, A SECOND TIMING DISCHARGE PATH INCLUDNG FIXED IMPEDANCE MEANS INTERCONNECTING THE BASE ELECTRODE OF SAID FIRST TRANSISTOR AND THE COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR, A FIRST DISCHARGE CONTROL CAPACITOR INTERCONNECTING THE BASE ELECTRODE OF SAID THIRD TRANSISTOR AND GROUND, A SECOND DISCHARGE CONTROL CAPACITOR INTERCONNECTING THE COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR AND THE CATHODE OF A SWITCHING DIODE, THE ANODE OF SAID SWITCHING DIODE BEING CONNECTED TO THE BASE ELECTRODE OF SAID THIRD TRANSISTOR, A CLAMPING DIODE INTERCONNECTING A CIRCUIT NODE, COMMON TO SAID SECOND DISCHARGE CONTROL CAPACITOR AND THE CATHODE OF SAID SWITCHING DIODE, AND GROUND, AND A DISCHARGE DIODE HAVING ITS CATHODE CONNECTED TO A CURRENT NODE, COMMON TO THE BASE ELECTRODES OF SAID THIRD TRANSISTOR AND SAID FIRST BIAS CAPACITOR.