Stabilizing device for a control system

Claim 1

A STABLIZING DEVICE FOR A CONTROL SYSTEM OPERATING WITH ELECTRICAL SIGNALS COMPRISING: AT LEAST ONE SIGNAL-TRANSMITTING COMPONENT HAVING AN INPUT SIDE AND AN OUTPUT SIDE AND CAPABLE OF EXHIBITING WITHIN A LIMITED FREQUENCY RANGE MECHANICAL INSTABILITY PHENOMENA TENDING ADVERSELY TO AFFECT THE STABILITY OF THE SYSTEM; SIGNAL-TRANSMITTING ANALOG MEANS HAVING THE SAME SIGNAL-TRANSMITTING CHARACTERISTICS BUT BEING FREE OF SAID PHENOMENA THROUGHOUT THE ENTIRE OPERATING RANGE OF THE SYSTEM; SIGNAL-TRANSMITTING SWITCHING MEANS COMPRISING A FILTER NETWORK PASSAGE SIGNALS ONLY WITHIN SAID LIMITED FREQUENCY RANGE INCLUDING AT LEAST TWO HIGH-PASS FILTERS EACH HAVING AN INPUT SIDE AND AN OUTPUT SIDE, A DIFFERENTIAL UNIT HAVING AND INPUT AND AN OUTPUT, AND AN ADDING UNIT HAVING TWO INPUTS AND ONE OUTPUT, THE OUTPUTS OF SAID FILTERS BEING CONNECTED TO THE INPUT OF SAID DIFFERENTIAL UNIT, THE OUTPUT OF SAID DIFFERENTIAL UNIT BEING CONNECTED TO ONE INPUT OF SAID ADDING UNIT, THE OTHER INPUT OF SAID ADDING UNIT BEING CONNECTED TO THE INPUT SIDE OF ONE OF SAID FILTERS, THE PORTION OF THE SWITCHING MEANS BEING THE INPUT SIDE OF SAID ONE FILTER AND THE OUTPUT OF SAID ADDING UNIT CONSTITUTING PART OF A RESETTING DEVICE FOR THE CONTROL OF THE SYSTEM; MEANS FOR CONNECTING THE INPUT SIDE ON SAID ONE FILTER TO THE OUTPUT SIDE OF SAID COMPONENT; MEANS FOR CONNECTING THE INPUT SIDE OF SAID OTHER FILTER TO THE OUTPUT SIDE OF SAID ANALOG MEANS; AND MEANS FOR CONNECTING THE OUTPUT OF SAID ADDING UNIT TO THE INPUT SIDE OF SAID COMPONENT.