DE2042656

A servo-valve having a range of settings is urged progressively to or from a predetermined setting by a bellows responsive to input-signal fluid pressure. Feed-back from the valve output is to a cam having a cam follower linked by a lever of variable velocity ratio to a spring connected to the valve...

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Bibliographische Detailangaben
Hauptverfasser:	WAY, RODNEY, PORTSLADE, WARD, EDWARD JOHN, HAYWORDS HEATH
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A servo-valve having a range of settings is urged progressively to or from a predetermined setting by a bellows responsive to input-signal fluid pressure. Feed-back from the valve output is to a cam having a cam follower linked by a lever of variable velocity ratio to a spring connected to the valve which biasses the valve towards one end of its range of settings. The relationship between input-signal fluid pressure and valve output is determined by the contour of the cam surface and the relationship between change in input-signal fluid pressure and corresponding change in valve output is determined by the velocity ratio of the lever.