Automatic door operator

Claim 1

A DOOR OPERATOR HAVING AN ELECTRICAL SAFETY AND ACTUATING CONTROL SYSTEM WHICH INCLUDES FIRST NORMALLY OPEN SWITCH MEANS HAVING A CLOSED POSITION FOR ENERGIZING A FIRST CIRCUIT MEANS TO OPEN A NORMALLY URGED CLOSED DOOR AND MAINTAIN SAID DOOR OPEN FOR A PRESET INTERVAL OF TIME AFTER SAID FIRST SWITCH MEANS RETURNS TO OPEN POSITION, SECOND NORMALLY OPEN SWITCH MEANS HAVING A CLOSED POSITION FOR ENERGIZING A SECOND CIRCUIT MEANS TO PREVENT SAID FIRST CIRCUIT MEANS FROM BEING ENERGIZED IF SAID SECOND CIRCUIT IS ENERGIZED FIRST, AND FOR MAINTAINING SAID DOOR OPEN UNTIL AFTER SAID FIRST AND SECOND SWITCH MEANS RETURN TO OPEN POSITION AND SAID PRESET INTERVAL OF TIME HAS EXPIRED IF SAID FIRST SWITCH MEANS IS CLOSED FIRST AND SAID SECOND CIRCUIT IS ENERGIZED WHILE SAID FIRST CIRCUIT IS STILL ENERGIZED, THIRD NORMALLY OPEN SWITCH MEANS FOR ENERGIZING A THIRD CIRCUIT MEANS FOR STOPPING THE OPENING OR CLOSING MOVEMENT OF THE DOOR.