Material dispensing apparatus

Claim 1

A MATERIAL HANDLING APPARATUS COMPRISING FIRST AND SECOND MATERIAL CONTAINERS, AT LEAST ONE MEANS FOR CONVEYING MATERIAL FROM THE FIRST MATERIAL CONTAINER TO THE SECOND MATERIAL CONTAINER, MEANS FOR DRIVING SAID CONVEYOR MEAS, SAID CONVEYOR DRIVING MEANS HAVING A FLUID ACTUATED CLUTCH MEANS FOR SELECTIVELY TRANSMITTING DRIVE TO THE CONVEYOR MEANS, A SOURCE OF FLUID UNDER PRESSURE, MEANS FOR SUPPLYING THE FLUID TO THE FLUID CLUTCH MEANS TO ACTUATE THE SAME, ELECTRICALLY ACTUATED VALVE MEANS FOR CONTROLLING THE SUPPLY OF FLUID TO THE CLUTCH MEANS AND AN ELECTRICAL CONTRTOL SYSTEM COMPRISING A CURRENT SOURCE, CURRENT SUPPLY CIRCUIT MEANS FOR ENERGIZING THE ELECTRICALLY ACTUATED VALVE MEANS, AN INTERRUPTER CIRCUIT MEANS FOR SELECTIVELY INTERRUPTING THE CURRENT SUPPLY CIRCUIT MEANS RESPONSIVE TO THE LOADING OF MATERIAL IN THE SECOND CONTAINER AT A FIRST PREDETERMINED LEVEL, AND A HOLD CIRCUIT FOR MAINTAINING THE INTERRUPTIN OF THE CURRENT SUPPLY CIRCUIT MEANS RESPONSIVE TO THE ENERGIZATION OF THE INTERRUPTER CIRCUIT MEANS AND THE LOADING OF MATERIAL IN THE SECOND CONTAINER AT A SECOND PREDETERMINED LEVEL LOWER THAN THE FIRST PREDETERMINED LEVEL.