Fuel burner control arrangement

Claim 1

IN COMBINATION AN OIL BURNER, MEANS FOR MOVING SAID BURNER TO EITHER AN EXTENDED POSITION OR A RETRACTED POSITION, AN OIL SUPPLY LINE FOR THE BURNER, A FIRST VALVE POSITIONED IN THE SUPPLY LINE FOR CONTROLLING THE FLOW OF OIL TO THE BURNER, A PURGE LINE CONNECTED TO THE OIL SUPPLY LINE DOWNSTREAM OF THE FIRST VALVE, A SECOND VALVE POSITIONED IN THE PURGE LINE FOR CONTROLLING THE FLOW OF PURGING MEDIUM TO THE BURNER, CONTROL MEANS FOR THE BURNER AND INCLUDING FIRST MEANS FOR CONTROLLING THE POSITION OF THE FIRST VALVE, SECOND MEANS FOR CONTROLLING THE POSITION OF THE BURNER, THIRD MEANS FOR CONTROLLING THE POSITION OF THE SECOND VALVE, FIRST SWITCH MEANS ACTUABLE BY AN OPERATOR, BEING SO ASSOCIATED WITH THE CONTROL MEANS THAT WHEN IT IS MOVED TO ITS OPEN POSITION IT CAUSES MOVEMENT OF THE FIRST SECOND AND THIRD MEANS SUCH THAT THE FOLLOWING SEQUENTIAL ACTIONS TAKE PLACE; THE FIRST VALVE IS MOVED TO ITS CLOSED POSITION, THE SECOND VALVE IS OPENED FOR A PREDETERMINED PERIOD OF TIME, THE BURNER IS MOVED TO ITS RETRACTED POSITION, AND THE SECOND VALVE IS CLOSED; A FRAME SCANNER FOR DETECTING WHETHER OR NOT A FLAME IS ISSUING FROM THE BURNER, SECOND SWITCH MEANS ASSOCIATED WITH THE FLAME SCANNER AND THE CONTROL MEANS SUCH THAT WHEN THE FLAME SCANNER SENSES NO FLAME THE SECOND SWITCH MEANS CAUSES THE FOLLOWING SEQUENTIAL ACTIONS TO TAKE PLACE; THE FIRST VALVE IS CLOSED, AND THE BURNER IS MOVED TO ITS RETRACTION POSITION, AND THE SECOND VALVE MEANS CLOSED, SO THAT THE BURNER IS NOT PURGED.