Security locks

Claim 2

A magnetic security lock comprising, in combination, a housing having an axis and an accessible end, blocking means rotatably mounted within said housing for limited rotation about an axis substantially parallel to said housing axis and selectively orientable between locking and unlocking positions, control means mounted within said housing for selective relative cooperable movement with respect to said blocking means in the direction of said housing axis, said blocking means cooperating with said control means wherein orientation of said blocking means to said locking position relates said blocking and control means to prevent unlocking of said lock and orientation of said blocking means to said unlocking position relates said blocking and control means to permit unlocking of said lock, said blocking means having a first permanent magnet diametrically mounted thereon disposed adjacent said housing end having poles rotatable in a plane substantially perpendicular to said housing axis, a key adapted to be placed adjacent said housing end for orientation in a predetermined manner with respect to said housing axis, a pair of spaced, substantially parallel second permanent magnets mounted upon said key having poles substantially perpendicularly oriented to said housing axis when said key is placed adjacent said housing end, the spacing between said second magnets being greater than the width of said first magnet and said second magnets being so located on said key as to be disposed on opposite sides of said first magnet when said key is oriented to said housing end in said predetermined manner, like poles of said first and second magnets being oriented such that said second magnets impose repulsion magnetic forces on said first magnet to rotatably orient said blocking means to its unlocking position and permitting relative movement thereof with respect to said control means to permit unlocking of said lock.

Claim 3

In a magnetic security lock as in claim 1 wherein sAid blocking means comprises at least a pair of rotatable members mounted within said housing each having a first permanent magnet mounted thereon, said first magnets being rotatable in a common plane substantially perpendicular to said housing axis, and at least two pairs of second magnets mounted in said key within a common plane, each pair of second key magnets adapted to impose a repulsion magnetic force upon a first magnet and member.

Claim 4

In a magnetic security lock as in claim 2, key positioning means defined on said housing accessible end, and complementary key positioning cooperating means defined on said key controlling orientation of said key adjacent said housing end.

Claim 5

In a magnetic security lock as in claim 2 wherein said blocking means members include coplanar discs disposed substantially perpendicular to said housing axis each having a periphery, a notch defined in each of said disc peripheries complementary to a portion of the aligned transverse cross section of said control means, said notches defining an opening receiving said control means upon positioning of said blocking means discs to said unlocking position permitting relative axial movement of said control means and said blocking means members.

Claim 6

A magnetic security lock comprising, in combination, a housing having an axis and an accessible end, control means movably mounted within said housing for movement in the direction of said housing axis between operative and inoperative positions, blocking means movably mounted within said housing selectively orientable between locking and unlocking positions, said blocking means cooperating with said control means wherein orientation of said blocking means to said locking position prevents movement of said control means from said inoperative position to said operative position and orientation of said blocking means to said unlocking position permits movement of said control means from said inoperative position to said operative position, said blocking means comprising at least one member rotatable about an axis parallel to said housing axis and having a first permanent magnet mounted thereon disposed adjacent said housing end having poles rotatable in a plane substantially perpendicular to said housing axis, a key adapted to be placed adjacent said housing end for orientation in a predetermined manner with respect to said housing axis, a second permanent magnet mounted within said key having poles substantially perpendicularly oriented to said housing axis, the poles of said first and second magnets being oriented such that said second magnet imposes repulsion magnetic forces on said first magnet to rotatably orient said blocking means member to its unlocking position and permitting axial movement of said control means to its operative position, a ferromagnetic anti-tampering member surrounding said blocking means and axially displaceable within said housing between holding and release positions selectively preventing and permitting rotation of the associated blocking means, spring means biasing said anti-tampering member to said release position, said anti-tampering means being drawn into holding position if subjected to predetermined magnetic forces.

Claim 7

A magnetic security lock comprising, in combination, a housing having an axis and an accessible end, control means movably mounted within said housing for movement in the direction of said housing axis between operative and inoperative positions, blocking means movably mounted within said housing selectively orientable between locking and unlocking positions, said blocking means cooperating with said control means wherein orientation of said blocking means to said locking position prevents movement of said control means from said inoperative position to said operative position and orientation of said blocking means to said unlocking position permits movement of said control means from said inoperative position to said operative position, said blocking means comprising at least one member rotatable about an axis parallel to said housing axis and having a first permanent magnet mounted thereon disposed adjacent said housing end having poles rotatable in a plane substantially perpendicular to said housing axis, a key adapted to be placed adjacent said housing end for orientation in a predetermined manner with respect to said housing axis, a second permanent magnet mounted within said key having poles substantially perpendicularly oriented to said housing axis, the poles of said first and second magnets being oriented such that said second magnet imposes repulsion magnetic forces on said first magnet to rotatably orient said blocking means member to its unlocking position and permitting axial movement of said control means to its operative position, a ferromagnetic anti-tampering member surrounding said blocking means and axially displaceable within said housing between holding and release positions selectively preventing and permitting rotation of the associated blocking means, spring means biasing said anti-tampering member to said release position, said anti-tampering means being drawn into holding position if subjected to predetermined magnetic forces.

Claim 8

A magnetic security lock comprising, in combination, a housing having an open end, a control shaft rotatably mounted within said housing about an axis and capable of axial displacement between first and second positions, an arm mounted on said shaft for pivotal movement on a pivot axis perpendicular to said shaft axis between shaft locking and shaft releasing positions, abutment means defined on said housing receiving said arm when in said shaft locking position, biasing means biasing said arm toward said shaft locking position, a pair of permanent magnets mounted on said arm, a magnet being mounted on each side of said pivot axis equidistant therefrom, torque transmitting means defined on said shaft adjacent said housing end, a key adapted to be received within said housing oPen end, a pair of permanent magnets mounted on said key, torque transmitting means defined on said key mating with said shaft torque transmitting means for transferring torque from said key to said shaft upon said key being placed in said housing end in a predetermined manner, said key mounted magnets being disposed adjacent said arm mounted magnets with like poles disposed toward each other to produce repulsion forces to overcome said arm biasing means and pivot said arm to said shaft releasing position.

Claim 9

A magnetic security lock comprising, in combination, a housing having an open end, a control shaft rotatably mounted within said housing about an axis and capable of axial displacement between first and second positions, an arm mounted on said shaft for pivotal movement on a pivot axis perpendicular to said shaft axis between shaft locking and shaft releasing positions, abutment means defined on said housing receiving said arm when in said shaft locking position, biasing means biasing said arm toward said shaft locking position, a pair of permanent magnets mounted on said arm, a magnet being mounted on each side of said pivot axis equidistant therefrom, torque transmitting means defined on said shaft adjacent said housing end, a key adapted to be received within said housing oPen end, a pair of permanent magnets mounted on said key, torque transmitting means defined on said key mating with said shaft torque transmitting means for transferring torque from said key to said shaft upon said key being placed in said housing end in a predetermined manner, said key mounted magnets being disposed adjacent said arm mounted magnets with like poles disposed toward each other to produce repulsion forces to overcome said arm biasing means and pivot said arm to said shaft releasing position.

Claim 10

In a magnetic security lock as in claim 6 wherein said biasing means comprises at least one magnet mounted on said shaft.