Electromagnetic actuator

Claim 1

AN ELECTROMAGNETIC ACTUATOR FOR AN INSTRUMENTALITY HAVING A SLIDABLE OPERATOR MOVABLE THROUGH A PREDETERMINED DISTANCE, SAID SLIDABLE OPERATOR BEING NORMALLY URGED TO A PREDETERMINED POSITION COMPRISING A WOUND COIL ADAPTED TO BE CONNECTED TO A SOURCE OF ELECTRICAL ENERGY TO BE ENERGIZED THEREBY, AND A HOUSING OF MAGNETIZABLE MATERIAL FORMING A CONTROLLED FLUX PATH SURROUNDING SAID COIL COMPRISING AN OUTER CASING AND A PAIR OF END PLATES SECURED THERETO AND ENCLOSING THE COIL, ONE OF SAID END PLATES HAVING A SLEEVE EXTENDING INTO SAID COIL AND HAVING AN ARMATURE SLIDABLE THEREIN AND SEPARATE FROM SAID SLIDABLEF OPERATOR AND THE OTHER OF SAID END PLATES HAVING A BUSHING EXTENDING INTO THE COIL ADJACENT TO BUT SPACED FROM THE END OF THE SLEEVE AND THE ARMATURE A DISTANCE EQUAL TO SAID PREDETERMINED DISTANCE TO FORM AN AIR GAP HAVING A MAXIMUM FLUX DENSITY IN SAID FLUX PATH, SAID BUSHING AND END PLATE HAVING A BORE TO SLIDABLY RECEIVE SAID SLIDABLE OPERATOR, SAID SLIDABLE OPERATOR EXTENDING INTO THE AIR GAP A DISTANCE EQUAL TO THE REQUIRED MOVEMENT THEREOF AND APPLYING A FORCE TO SAID ARMATURE TO NORMALLY MOVE THE ARMATURE TO A NORMALLY RETRACTED POSITION, ENERGIZATION OF SAID COIL CAUSING THE ARMATURE TO OVERCOME THE FORCE APPLIED BY THE OPERATOR AND TO MOVE TOWARD SAID BUSHING AND MOVE THE OPERATOR FROM SAID NORMAL POSITION FOR SAID PREDETERMINED DISTANCE TO OPERATE SAID INSTRUMENTALITY.