摘要:
AN ELECTRONIC VACUUM MICROBALANCE SYSTEM COMPRISES A LIFT-PRODUCING MEMBER WHICH IS RESPONSIVE TO THE GAS PRESSURE IN A GAS RECEIVER AND A PRESSURE-SETTING STEPPING MECHANISM TO CONTROL THE CAPACITY OF SAID MICROBALANCE SYSTEM. A PULSE GENERATOR IS CONNECTED TO SAID STEPPING MECHANISM AND OPERABLE TO INITIATE STEPPING MOVEMENTS OF SAID MECHANISM. A CONTROL SYSTEM ESTABLISHES AND MAINTAINS IN THE RECEIVER A PRESSURE WHICH CORRESPONDS TO THE SETTING OF SAID STEPPING MECHANISM AND INCLUDES GAS VALVE MEANS ADAPTED TO CONTROL THE GAS PRESSURE IN SAID RECEIVER AND AN ELECTRIC CONTROLLER OPERATIVELY CONNECTED TO THE MICROBALANCE SYSTEM AND TO THE GAS VALVE MEANS AND ADAPTED TO CONTROL THE GAS VALVE MEANS IN RESPONSE TO THE OUTPUT OF THE MICROBALANCE SYSTEM.