Electromagnetic apparatus for transmitting motion from the outside to a rod-shaped member within a tubular housing

Claim 1

ELECTROMAGNETIC APPARATUS FOR IMPARTING MOTION FROM THE OUTSIDE TO A ROD STRUCTURE WITHIN A HOUSING, COMPRISING A TUBULAR HOUSING AND AN ELONGATED ROD STRUCTURE AXIALLY DISPLACEABLE IN SAID HOUSING, RESPECTIVE MOVING AND HOLDING ARMATURE MEANS SURROUNDING SAID ROD STRUCTURE INSIDE SAID HOUSING, SAID MOVING ARMATURE MEANS BEING AXIALLY RECIPROCABLE A GIVEN DISTANCE AND HAVING A BIASING FORCE TENDING TO MOVE IT IN ONE DIRECTION, MOTION CONTROL ELECTROMAGNET MEANS SURROUNDING THE HOUSING FOR MOVING SAID MOVING ARMATURE MEANS IN THE OTHER DIRECTION WHEN ENERGIZED, HOLDING ELECTROMAGNET MEANS SURROUNDING THE HOUSING, SAID HOLDING ARMATURE MEANS HAVING A PLURALITY OF CLAMPING PARTS ANGULARLY DISPLACED FROM ONE ANOTHER ABOUT THE AXIS OF SAID ROD STRUCTURE AND SURROUNDING SAID ROD STRUCTURE WITH CLEARANCE WHEN SAID HOLDING ELECTROMAGNETIC MEANS ARE DEENERGIZED, SAID PARTS BEING ATTRACTABLE OUTWARDLY BY SAID HOLDING ELECTROMAGNETIC MEANS WHEN THE LATTER IS ENERGIZED TO THEN CLAMP SAID ROD STRUCTURE, SAID MOVING ARMATURE MEANS BEING ENGAGEABLE TO SAID HOLDING ARMATURE MEANS TO MOVE TOGETHER IN THE OTHER DIRECTION, WHEREBY SAID MAGNETS CAN BE PERIODICALLY ENERGIZED TO PROGRESSIVELY SHIFT SAID ROD STRUCTURE IN SAID HOUSING.