Electromagnetic control mechanism, especially for regulating valves

Claim 1

AN ELECTROMAGNETIC CONTROL MECHANISM, PRIMARILY FOR OPERATING AND CONTROLLING A REGULATING VALVE, COMPRISING A CLOSED HOUSING, FIELD COIL IN SAID HOUSING, AND ARMATURE IN SAID HOUSING, A RETURN SPRING ACTING UPON SAID ARMATURE, SAID ARMATURE BEING ADAPTED TO MOVE IN ITS AXIAL DIRECTION AGAINST THE ACTION OF SAID RETURN SPRING WHEN SAID FIELD COIL IS ENERGIZED, CONNECTING MEANS ON ONE END OF SAID ARMATURE FOR CONNECTING THE SAME TO AN ELEMENT TO BE MOVED AND CONTROLLED THEREBY, A PAIR OF FLUID-DISPLACEMENT CHAMBERS WITHIN SAID HOUSING AT THE OPPOSITE ENDS OF SAID ARMATURE, A CONTROL LINE CONNECTING SAID CHAMBERS WITH EACH OTHER, A THROTTLE VALVE WITHIN SAID CONTROL LINE, MEANS FOR MANUALLY ADJUSTING SAID THROTTLE VALVE FROM THE OUTSIDE OF SAID HOUSING FOR VARYING THE RATE OF FLOW OF A PRESSURE FLUID THROUGH SAID CONTROL LINE, A BY-PASS LINE ALSO CONNECTING SAID CHAMBERS WITH EACH OTHER AND BYPASSING SAID THROTTLE VALVE; SAID CHAMBERS, SAID CONTROL LINE, AND SAID BY-PASS LINE ADAPTED TO BE FILLED WITH SAID PRESSURE FLUID, AND AN ELECTROMAGNETIC CONTROL VALVE FOR OPENING AND CLOSING SAID BY-PASS LINE, SAID ARMATURE PROJECTING WITH ITS OPPOSITE ENDS INTO SAIDS CHAMBERS AND BEING ADAPTED WHEN MOVED IN ONE DIRECTION TO MOVE WITH ONE END MORE DEEPLY INTO A FIRST OF SAID CHAMBERS AND WITH IT S OTHER END FARTHER OUT OF THE SECOND CHAMBER SO AS TO CONVEY SAID PRESSURE FLUID FROM SAID FIRST CHAMBER TO SAID SECOND CHAMBER THROUGH SAID CONTROL LINE AND SAID SECOND CHAMBER SAID CONTROL VALVE IS CLOSED AND ALSO THROUGH SAID BY-PASS LINE AND SAID CONTROL VALVE WHEN SAID CONTROL VALVE IS OPEN.