Fluid level control system

Claim 1

A PUMP CONTROL SYSTEM COMPRISING, IN COMBINATION, A SWITCH, FIRST EXTERNAL PRESSURE SENSITIVE MEANS COMPRISING A SEALED HOLLOW FLEXIBLE MEMBER FORMING AN AIR CHAMBER, SAID FIRST MEANS BEING LOCATED WITHIN A FLUID CONTAINER, SECOND EXTERNAL PRESSURE SENSITIVE MEANS RESPONSIVE TO A CHANGE IN PRESSURE IN THE CHAMBER OF SAID FIRST MEANS FOR CONTROLLING SAID SWITCH, SAID SECOND MEANS COMPRISING A SEALED HOLLOW FLEXIBLE MEMBER FORMING AN AIR CHAMBER, SAID SECOND MEANS BEING LOCATED ADJACENT SAID SWITCH, A HOLLOW MEMBER FORMING AN AIR PASSAGE COMMUNICATING AT ONE END WITH THE INTERIOR OF SAID FIRST MEANS AND AT THE OTHER END WITH THE INTERIOR OF SAID SECOND MEANS, SAID MEMBER BEING HERMETICALLY SEALED TO BOTH SAID FIRST AND SECOND MEANS TO FORM AN AIR FLOW PASSAGE BETWEEN SAID FIRST AND SECOND MEANS, SAID FIRST AND SECOND MEANS AND SAID MEMBER DEFINING A SEALED AIR SYSTEM, AND MEANS WITHIN SAID HOLLOW MEMBER FOR IMPEDING THE FLOW OF AIR THERETHROUGH WHEREBY THERE IS A FINITE DELAY IN THE RESPONSE OF SAID SECOND MEANS TO A CHANGE IN PRESSURE IN SAID FIRST MEANS.