Pivot mounting for oscillatory tool

Claim 1

IN A PIVOT MOUNTING FOR THE ARMATURE OF AN ELECTROMAGNETIC RECIPROCATING MOTOR HAVING AN ELONGATED ARMATURE, E-SHAPED CORE, AND COIL MOUNTED ON ONE END OF SAID PORTION OF SAID CORE, A PAIR OF LEGS ON ONE END OF SAID CORE, SAID LEGS BEING SPACED FROM AND ON OPPOSITE SIDES OF ONE END OF SAID ARMATURE, SAID LEGS AND THE ARMATURE PORTION BETWEEN THE LEGS HAVING APERTURE PORTIONS, THE APERTURE PORTION IN SAID ARMATURE BEING OF SLIGHTLY SMALLER DIAMETER THAN SAID ARMATURE BEING OF SLIGHTLY SPRING MEANS BETWEEN SAID ARMATURE AND CORE URGING THE ARMATURE AWAY FROM THE CORE, A PLURALITY OF SPRING LIKE RODS OF CIRCULAR CROSS-SECTIONAL SHAPE EXTENDING THROUGH SAID APERTURED PORTIONS AND BETWEEN SAID ARMATURE AND LEGS, SAID RODS BEING ANNULARLY ARRANGED AND IN CLOSELY ADJACENT RELATION WITHIN THE APERTURED PORTION OF SAID ARMATURE, AND PLUGS WITHIN SAID APERTURED PORTIONS FORCING THE PORTIONS OF SAID RODS WITHIN SAID APERTURED PORTIONS OF SAID RODS WITHN SAID APERTIONS SO AS TO BE IN FRICTIONAL CONTACT THEREWITH, THE FREE LENGTHS OF SAID RODS BETWEEN SAID APERTURED PORTIONS HAVING SOME SLACK AND BEING SLIGHTLY S-SHAPED IN THEIR UNSTRETCHED CONDITION WHEN THE ARMATURE IS AT REST, AT LEAST SOME OF THE SLACK OF SAID FREE ROD LENGTHS BEING TAKEN UP WHEN SAID ARMATURE APPROACHES EACH OF ITS ARCUATE STROKE.