Signal switching device

Claim 2

In combination in a cross point switch, comprising: a plurality of spaced parallel input signaling lines; a plurality of spaced parallel output signaling lines intersecting said input signaling lines for providing cross points therebetween; a plurality of switching devices, each positioned at one of said cross points and including two magnetic reeds disposed in sideby-side relation to have overlapping and movable adjacent ends normally disengaged and opposite ends joined to said input and output lines at said latter one cross point; a plurality of input control lines for selectively receiving voltages; a plurality of output control lines for selectively receiving voltages, said output control lines intersecting said input control lines at said cross points; and magnetic means connected to said input and output control lines at said respective cross points for controlling thereat the engagement of said overlapping adjacent reeds ends to establish make-circuits between said input and output signaling lines at said respective cross points, comprising: a plurality of unidirectional conductive diodes, each at each of said cross points having a first electrode connected to one of said input control lines and a second electrode; a plurality of first and second magnetic core means, each positioned at one of said cross points at a position proximate to said overlapping adjacent reeds ends thereat, each of said plurality of first magnetic core means producing a biasing magnetic field in a first direction tending to establish said make-circuit; a plurality of energizing electric windings each of which is wound on a corresponding one of said plurality of second magnetic core means and having one end connected to said second electrode at each of said cross points and an opposite end connected to a corresponding output control line, for producing an energizing magnetic field in said first direction in aiding relationship with respect to said biasing magnetic field whereby a make-circuit is established when current flows through said energizing electric winding in response to voltage applied to a preselected input control line and a preselected output control line; and a plurality of first series circuits each of which includes a plurality of series connected second electric windings and an output control line, each of said second electric windings being wound on a corresponding one of said plurality of second magnetic core means for producing a magnetic field in a second direction in opposing relationship with respect to said energizing magnetic field whereby make-circuits are disengaged at cross points when current flows through a series circuit in response to said voltage applied to said preselected output control line without disturbing said make-circuit established in response to voltage applied to said preselected input control line and said preselected output control line.

Claim 3

The cross point switch according to claim 1 which includes a plurality of second series circuits each of which includes a plurality of series connected third electric windings and an input control line, each of said third electric windings being wound on a corresponding one of said plurality of second magnetic core means for producing a magnetic field in said second direction in opposing relationship with respect to said energizing magnetic field whereby make-circuits are disengaged at cross-points when current flows through a series circuit in response to said voltage applied to said preselected input control line without disturbing said make-circuit established in response to voltage applied to said preselected input control line and said preselected output control line.

Claim 4

The cross point switch according to claim 1 wherein each of said plurality of first series circuits further includes a plurality of third electric windings connected in series with said second electric windings, each of said third electric windings being wound on a corresponding one of said plurality of first magnetic core means for producing said biasing magnetic field when current flows through a series circuit in response to voltage applied to said preselected input control line and said preselected output control line.

Claim 5

The cross point switch according to claim 1 wherein each of said first magnetic core means includes a third electric winding wound thereon and having one end connected to said energizing electric winding opposite end and including an opposite end connected to a corresponding series circuit for producing said biasing magnetic field when current flows through said energizing electric winding, said third electric winding and said corresponding series circuit in response to voltage applied to said preselected input control line and said preselected output control line.

Claim 6

The cross point switch according to claim 1 wherein each of said plurality of first magnetic core means comprises a permanent magnet and wherein each of said plurality of first series further includes a second unidirectional conductive diode having a first electrode connected through a common normally open switch contact to ground anD a second electrode connected to said series connected second electric windings whereby said current flows through said series circuit in response to said voltage applied to said preselected output control line when said common normally open switch contact is closed.

Claim 7

The cross point switch according to claim 2 wherein each of said plurality of first magnetic core means comprises a permanent magnet and wherein each of said plurality of second series circuits further includes a second unidirectional conductive diode having a first electrode connected through a first common normally open switch contact to ground and a second electrode connected to said series connected third electric windings whereby said current flows through said series circuit in response to said voltage applied to said preselected input control line when said first common normally open switch contact is closed.

Claim 8

The cross point switch according to claim 6 wherein each of said plurality of first series circuits further includes a third unidirectional conductive diode having a first electrode connected through a second common normally open switch contact to ground and a second electrode connected to said series connected second electric windings whereby said current flows through said last-mentioned series circuit in response to said voltage applied to said preselected output control line when said second common normally open switch contact is closed.

Claim 9

The cross point switch according to claim 6 wherein each of said plurality of first magnetic core means comprises a permanent magnet; and further including: a plurality of first normally closed switch contacts, each of which being connected between said energizing electric winding opposite end and said corresponding output control line such that each of said first normally closed switch contacts is in shunt relationship with a first series circuit; and a plurality of second normally closed switch contacts, each of which being connected between said unidirectional conductive diode first electrode and a corresponding input control line such that each of said second normally closed switch contacts is in shunt relationship with a second series circuit, whereby current flows through a first series circuit including said preselected output control line, through a second series circuit including said preselected input control line and through an energizing electric winding in response to said voltage applied to said preselected input control line and said preselected output control line when said first and second normally closed switch contacts are opened.

Claim 10

Cross point switching apparatus comprising in combination a plurality of spaced parallel input signaling lines; a plurality of spaced parallel output signaling lines crossing said input lines at right angles for providing cross points therebetween; a plurality of switching devices, each positioned at one of said cross points and including two magnetic reeds disposed in side-by-side relation to have overlapping and movable adjacent ends normally disengaged and opposite ends joined to said respective input and output lines; a plurality of input control lines, each associated with one of said input signaling lines; a plurality of output control lines, each associated with one of said output signaling lines; a plurality of permanent magnets, each positioned in proximity of said overlapping two reeds adjacent ends at one of said cross points for producing a permanent magnetic field tending to move said overlapping adjacent reeds ends into engagement at a corresponding cross point; and magnetic means connected to said input and output control lines at said respective cross points for controlling thereat the engagement and disengagement of said overlapping adjacent reeds ends to establish make-circuits and break-circuits, respectively, between said input and output signaling lines at said cross points, comprising: a plurality of first unidirectional Conductive diodes, each at each of said cross points aligned with one of said input control lines having an anode connected to a corresponding input control line and also having a cathode; a plurality of magnetic cores, each located at one of said cross points in a position proximate to said overlapping adjacent reeds ends thereat; a plurality of electric windings wound on each of said cores; a first winding of said windings wound on each of said cores having one end connected to said cathode at each of said cross points aligned with one of said output control lines and an opposite end connected to said latter one output control line; a plurality of second unidirectional conductive diodes, each having an anode and a cathode; a first normally open switch contact connecting said anodes of said second diodes to ground; second windings of said windings wound on said cores aligned with each of said input control lines so connected in series that one outermost end of said series-connected second windings is joined to one of said input control lines and another outermost end of said latter windings is secured to said cathode of one of said second diodes; a plurality of third unidirectional conductive devices, each having an anode and a cathode; a second normally open contact connecting said anodes of said third diodes to ground; third windings of said windings wound on said cores aligned with each of said output control lines so connected in series that one outermost end of said series-connected third windings is joined to a corresponding output control line and another outermost end of said latter windings is fastened to said cathode of one of said third diodes; whereby voltage of opposite polarities simultaneously applied to one preselected input control line and one preselected output control line cause a first current to flow in a circuit including said preselected input control line, said first diode and said first winding at said preselected input and output control lines cross point and said preselected output control line for energizing said last-mentioned first winding to activate said core associated with said last-mentioned winding to produce at said last-mentioned core a magnetic field aiding said permanent magnetic field at said last-mentioned cross point to move said overlapping adjacent reeds ends thereat into engagement to establish at said latter cross point a make-circuit between input and output signaling lines corresponding with said respective preselected input and output control lines; closure of said first contact causes a second current to flow in a circuit including ground, said closed first contact, said second diode and said series-connected second windings aligned with said preselected input control line and said preselected input control line for energizing said latter windings to activate said cores associated with said latter windings in such manner that said second windings wound on said latter cores in a sense opposite to said first windings wound on the same cores activate said latter cores to produce thereat magnetic fields opposing said permanent magnet magnetic fields effective at said cross points aligned with said preselected input control line to disengage overlapping adjacent reeds ends proximate to said latter windings to establish break-circuits between input and output signaling lines at said cross points aligned with said preselected input control line; and closure of said second contact causes a third current to flow in a circuit including ground, said closed second contact, said third diode and said series-connected third windings aligned with said preselected output control line and said preselected output control line for energizing said latter windings in such manner that said third windings wound on said latter cores in a sense opposite to said first windings wound on the same cores activate said latter cores to produce thereat magnetic fields opposing said permanent magneT magnetic fields effective at said cross points aligned with said preselected output control line to disengage overlapping adjacent reeds ends proximate to said latter windings to establish break-circuits between input and output signaling lines aligned with said preselected output control line; said latter energized series-connected second and third windings failing to disturb said engagement of said overlapping adjacent reeds ends at said preselected input and output control lines cross point.

Claim 11

Cross point switching apparatus comprising in combination a plurality of spaced parallel input signaling lines; a plurality of spaced parallel output signaling lines crossing said input lines at right angles for providing cross points therebetween; a plurality of switching devices, each positioned at one of said cross points and including two magnetic reeds disposed in side-by-side relation to have overlapping and movable adjacent ends normally disengaged and opposite ends joined to said respective input and output lines; a plurality of input control lines, each associated with one of said input signaling lines; a plurality of output control lines, each associated with one of said output signaling lines; a plurality of permanent magnets, each positioned in proximity of said overlapping two reeds adjacent ends at one of said cross points for producing a permanent magnetic field tending to move said overlapping adjacent reeds ends into engagement at a corresponding cross point; and magnetic means connected to said input and output control lines at said respective cross points for controlling thereat the engagement and disengagement of said overlapping adjacent reeds ends to establish make-circuits and break-circuits, respectively, between said input and output signaling lines at said cross points, comprising: a plurality of first unidirectional Conductive diodes, each at each of said cross points aligned with one of said input control lines having an anode connected to a corresponding input control line and also having a cathode; a plurality of magnetic cores, each located at one of said cross points in a position proximate to said overlapping adjacent reeds ends thereat; a plurality of electric windings wound on each of said cores; a first winding of said windings wound on each of said cores having one end connected to said cathode at each of said cross points aligned with one of said output control lines and an opposite end connected to said latter one output control line; a plurality of second unidirectional conductive diodes, each having an anode and a cathode; a first normally open switch contact connecting said anodes of said second diodes to ground; second windings of said windings wound on said cores aligned with each of said input control lines so connected in series that one outermost end of said series-connected second windings is joined to one of said input control lines and another outermost end of said latter windings is secured to said cathode of one of said second diodes; a plurality of third unidirectional conductive devices, each having an anode and a cathode; a second normally open contact connecting said anodes of said third diodes to ground; third windings of said windings wound on said cores aligned with each of said output control lines so connected in series that one outermost end of said series-connected third windings is joined to a corresponding output control line and another outermost end of said latter windings is fastened to said cathode of one of said third diodes; whereby voltage of opposite polarities simultaneously applied to one preselected input control line and one preselected output control line cause a first current to flow in a circuit including said preselected input control line, said first diode and said first winding at said preselected input and output control lines cross point and said preselected output control line for energizing said last-mentioned first winding to activate said core associated with said last-mentioned winding to produce at said last-mentioned core a magnetic field aiding said permanent magnetic field at said last-mentioned cross point to move said overlapping adjacent reeds ends thereat into engagement to establish at said latter cross point a make-circuit between input and output signaling lines corresponding with said respective preselected input and output control lines; closure of said first contact causes a second current to flow in a circuit including ground, said closed first contact, said second diode and said series-connected second windings aligned with said preselected input control line and said preselected input control line for energizing said latter windings to activate said cores associated with said latter windings in such manner that said second windings wound on said latter cores in a sense opposite to said first windings wound on the same cores activate said latter cores to produce thereat magnetic fields opposing said permanent magnet magnetic fields effective at said cross points aligned with said preselected input control line to disengage overlapping adjacent reeds ends proximate to said latter windings to establish break-circuits between input and output signaling lines at said cross points aligned with said preselected input control line; and closure of said second contact causes a third current to flow in a circuit including ground, said closed second contact, said third diode and said series-connected third windings aligned with said preselected output control line and said preselected output control line for energizing said latter windings in such manner that said third windings wound on said latter cores in a sense opposite to said first windings wound on the same cores activate said latter cores to produce thereat magnetic fields opposing said permanent magneT magnetic fields effective at said cross points aligned with said preselected output control line to disengage overlapping adjacent reeds ends proximate to said latter windings to establish break-circuits between input and output signaling lines aligned with said preselected output control line; said latter energized series-connected second and third windings failing to disturb said engagement of said overlapping adjacent reeds ends at said preselected input and output control lines cross point.

Claim 12

Cross point switching apparatus, comprising in combination: a plurality of spaced parallel input signaling lines; a plurality of spaced parallel output signaling lines crossing said input lines at right angles for providing cross points therebetween; a plurality of switching devices, each positioned at one of said cross points and including two magnetic reeds spaced in side-by-side relation to have overlapping and movable adjacent ends normally disengaged and opposite ends joined to said respective input and output lines; a plurality of input control lines, each associated with one of said input signaling lines; a plurality of output control lines, each associated with one of said output signaling lines: a plurality of permanent magnets, each positioned proximate to said overlapping adjacent two reeds ends at each of said cross points for producing a permanent magnetic field tending to move said overlapping adjacent reeds ends into engagement at a corresponding cross point; and magnetic means connected to said input and output control lines at said cross points for controlling thereat the engagement and disengagement of said overlapping adjacent reeds ends thereat to establish make-circuits and break-circuits, respectively, at corresponding input and output signaling lives cross points, comprising: a plurality of first normally closed switch contacts; a plurality of first unidirectional conductive diodes, each at each of said cross points aligned with one of said input control lines having an anode connected through one of said first contacts to one of said input control line and also having a cathode; a plurality of magnetic cores, each located at one of said cross points in a position proximate to said overlapping adjacent reeds ends thereat; a plurality of electric windings wound on each of said cores; a plurality of second normally closed switch contacts; a first winding of said windings on each of said cores having one end connected to said cathode at each of said cross points aligned with one of said output control lines and an opposite end connected through one of said second contacts to said latter one input control line; second windings of said windings wound on said cores aligned with each of said input control lines so connected in series that one outermost end of said latter windings is joined to one input control line and another outermost end of said latter windings is connected through one of said first contacts to said latter one control line; third windings of said windings wound on each of said cores aligned with one of said output control lines so connected in series that one outermost end of said latter windings is connected to said first windings opposite ends aligned with one of said output control lines and another outermost end is connected to said latter one control line; whereby voltage applied to a preselected input control line and a preselected output control line causes a first current to flow in a circuit including said preselected input control line, said diode and said first winding at said preselected input and output control lines cross point, said second contact connected in said preselected output control line and said preselected output control line and said preselected output control line for energizing said last-mentioned first winding to activate said core associated with said last-mentioned winding to produce at said last-mentioned core a magnetic field aiding saId permanent magnetic field at said last-mentioned cross point to move said overlapping adjacent reeds ends at said latter cross point into engagement to establish at said latter crows point a make-circuit between input and output signaling lines corresponding with said respective input and output control lines; and, while said first and second contacts are opened, a second current is caused to flow in a circuit including said preselected input control line, said series-connected second windings connected to said preselected input control line, said diode and said first winding at said preselected input and output control lines cross point, said series-connected third windings connected to said preselected output control line and said preselected output control line for energizing said latter second and third windings to activate said cores associated with said latter windings in such sense that said latter second and third windings wound on said latter cores in a sense opposite to said windings wound on the same cores activate said latter cores to produce thereat magnetic fields effective at said cross points aligned with said preselected input and output control lines to disengage overlapping adjacent reeds ends proximate to said latter second and third windings to establish at said latter cross points break-circuits between input and output signaling circuits corresponding with said respective preselected input and output control lines, without disturbing said engagement of said overlapping adjacent reeds ends at said preselected input and output control lines cross point.

Claim 13

Cross point switching apparatus, comprising in combination: a plurality of spaced parallel input signaling lines; a plurality of spaced parallel output signaling lines crossing said input lines at right angles for providing cross points therebetween; a plurality of switching devices, each positioned at one of said cross points and including two magnetic reeds spaced in side-by-side relation to have overlapping and movable adjacent ends normally disengaged and opposite ends joined to said respective input and output lines; a plurality of input control lines, each associated with one of said input signaling lines; a plurality of output control lines, each associated with one of said output signaling lines: a plurality of permanent magnets, each positioned proximate to said overlapping adjacent two reeds ends at each of said cross points for producing a permanent magnetic field tending to move said overlapping adjacent reeds ends into engagement at a corresponding cross point; and magnetic means connected to said input and output control lines at said cross points for controlling thereat the engagement and disengagement of said overlapping adjacent reeds ends thereat to establish make-circuits and break-circuits, respectively, at corresponding input and output signaling lives cross points, comprising: a plurality of first normally closed switch contacts; a plurality of first unidirectional conductive diodes, each at each of said cross points aligned with one of said input control lines having an anode connected through one of said first contacts to one of said input control line and also having a cathode; a plurality of magnetic cores, each located at one of said cross points in a position proximate to said overlapping adjacent reeds ends thereat; a plurality of electric windings wound on each of said cores; a plurality of second normally closed switch contacts; a first winding of said windings on each of said cores having one end connected to said cathode at each of said cross points aligned with one of said output control lines and an opposite end connected through one of said second contacts to said latter one input control line; second windings of said windings wound on said cores aligned with each of said input control lines so connected in series that one outermost end of said latter windings is joined to one input control line and another outermost end of said latter windings is connected through one of said first contacts to said latter one control line; third windings of said windings wound on each of said cores aligned with one of said output control lines so connected in series that one outermost end of said latter windings is connected to said first windings opposite ends aligned with one of said output control lines and another outermost end is connected to said latter one control line; whereby voltage applied to a preselected input control line and a preselected output control line causes a first current to flow in a circuit including said preselected input control line, said diode and said first winding at said preselected input and output control lines cross point, said second contact connected in said preselected output control line and said preselected output control line and said preselected output control line for energizing said last-mentioned first winding to activate said core associated with said last-mentioned winding to produce at said last-mentioned core a magnetic field aiding saId permanent magnetic field at said last-mentioned cross point to move said overlapping adjacent reeds ends at said latter cross point into engagement to establish at said latter crows point a make-circuit between input and output signaling lines corresponding with said respective input and output control lines; and, while said first and second contacts are opened, a second current is caused to flow in a circuit including said preselected input control line, said series-connected second windings connected to said preselected input control line, said diode and said first winding at said preselected input and output control lines cross point, said series-connected third windings connected to said preselected output control line and said preselected output control line for energizing said latter second and third windings to activate said cores associated with said latter windings in such sense that said latter second and third windings wound on said latter cores in a sense opposite to said windings wound on the same cores activate said latter cores to produce thereat magnetic fields effective at said cross points aligned with said preselected input and output control lines to disengage overlapping adjacent reeds ends proximate to said latter second and third windings to establish at said latter cross points break-circuits between input and output signaling circuits corresponding with said respective preselected input and output control lines, without disturbing said engagement of said overlapping adjacent reeds ends at said preselected input and output control lines cross point.

Claim 14

Cross point switching apparatus, comprising in combination: a plurality of spaced parallel input signaling lines; a plurality of spaced parallel output signaling lines crossing said input lines at right angles for providing cross points therebetween; a plurality of switching devices, each positioned at one of said cross points and including two magnetic reeds disposed in side-by-side relation to have overlapping and movable adjacent ends normally disengaged and opposite ends connected to said respective input and output lines at said latter one cross point; a plurality of input control lines, each associated with one of said input signaling lines; a plurality of output control lines, each associated with one of said output signaling lines: and magnetic means connected to said input and output control lines at said respective cross points for controlling thereat the engagement and disengagement of said overlapping adjacent reed ends to establish make-circuits and break-circuits, respectively, between said input and output signaling lines at said respective cross points, comprising: a plurality of unidirectional conductive diodes, each having at each of said cross points an anode connected to one of said input control lines and cathode; two spaced magnetic cores located at each of said cross points; a plurality of windings positioned at each of said cross points in such manner that first and second windings are wound on one of said two cores and a third winding is wound on the other of said two cores at each of said cross points; said first windings having corresponding one ends connected to said cathodes and opposite ends connected to a common point as said latter first windings are aligned with each of said output control lines; said second and third windings so connected in series as to have one outermost end connected to said first windings common point and another outermost end joined to one of said output control lines as said last-mentioned first, second and third windings are aligned with each of said output control lines; whereby voltage effective at a preselected input control line and a preselected output control line causes current to flow in a circuit including said preselected input control line, said diode and said first winding at said preselected input and output control lines cross point, said series-connected second and third windinGs aligned with said preselected output control line, and said preselected output control line for simultaneously energizing said last-mentioned first, second and third windings to activate said one and other cores associated therewith in such manner that said one and other cores associated with said last-mentioned first and third winding wound in the same electrical sense on said respective latter one and other cores at said preselected input and output control lines cross point produce mutually aiding magnetic fields to move said overlapping reeds end at said last-mentioned cross point into engagement to establish one of said make-circuits between said input and output signaling lines corresponding to said respective input and output control lines at said last-mentioned cross point while said second windings wound on said last-mentioned one cores in an electrical sense opposite to said third windings wound on said other cores at said respective cross-points aligned with said preselected output control line produce magnetic fields opposing said magnetic fields produced by said last-mentioned third windings to disengage overlapping adjacent reeds ends as engaged at said last-mentioned cross points to establish break-circuits between said input and output signaling circuits at said last-mentioned cross points without disturbing said engagement of said overlapping adjacent reeds ends at said preselected input and output control lines cross point.

Claim 15

Cross point switching apparatus, comprising in combination: a plurality of spaced parallel input signaling lines; a plurality of spaced parallel output signaling lines crossing said input lines at right angles for providing cross points therebetween; a plurality of switching devices, each positioned at one of said cross points and including two magnetic reeds disposed in side-by-side relation to have overlapping and movable adjacent ends normally disengaged and opposite ends connected to said respective input and output lines at said latter one cross point; a plurality of input control lines, each associated with one of said input signaling lines; a plurality of output control lines, each associated with one of said output signaling lines: and magnetic means connected to said input and output control lines at said respective cross points for controlling thereat the engagement and disengagement of said overlapping adjacent reed ends to establish make-circuits and break-circuits, respectively, between said input and output signaling lines at said respective cross points, comprising: a plurality of unidirectional conductive diodes, each having at each of said cross points an anode connected to one of said input control lines and cathode; two spaced magnetic cores located at each of said cross points; a plurality of windings positioned at each of said cross points in such manner that first and second windings are wound on one of said two cores and a third winding is wound on the other of said two cores at each of said cross points; said first windings having corresponding one ends connected to said cathodes and opposite ends connected to a common point as said latter first windings are aligned with each of said output control lines; said second and third windings so connected in series as to have one outermost end connected to said first windings common point and another outermost end joined to one of said output control lines as said last-mentioned first, second and third windings are aligned with each of said output control lines; whereby voltage effective at a preselected input control line and a preselected output control line causes current to flow in a circuit including said preselected input control line, said diode and said first winding at said preselected input and output control lines cross point, said series-connected second and third windinGs aligned with said preselected output control line, and said preselected output control line for simultaneously energizing said last-mentioned first, second and third windings to activate said one and other cores associated therewith in such manner that said one and other cores associated with said last-mentioned first and third winding wound in the same electrical sense on said respective latter one and other cores at said preselected input and output control lines cross point produce mutually aiding magnetic fields to move said overlapping reeds end at said last-mentioned cross point into engagement to establish one of said make-circuits between said input and output signaling lines corresponding to said respective input and output control lines at said last-mentioned cross point while said second windings wound on said last-mentioned one cores in an electrical sense opposite to said third windings wound on said other cores at said respective cross-points aligned with said preselected output control line produce magnetic fields opposing said magnetic fields produced by said last-mentioned third windings to disengage overlapping adjacent reeds ends as engaged at said last-mentioned cross points to establish break-circuits between said input and output signaling circuits at said last-mentioned cross points without disturbing said engagement of said overlapping adjacent reeds ends at said preselected input and output control lines cross point.

Claim 16

Cross point switching apparatus, comprising in combination: a plurality of spaced parallel input signal lines; a plurality of spaced parallel output signaling lines crossing said input lines at right angles for providing cross-points therebetween; a plurality of switching devices, each positioned at one of said cross points and including two magnetic reeds disposed in side-by-side relation and having overlapping and movable adjacent ends normally disengaged and opposite ends connected to said respective input and output lines; a plurality of input control lines, each associated with one of said input signaling lines; a plurality of output control lines, each associated with one of said output signaling lines; and magnetic means connected to said input and output control lines at said respective cross points for controlling thereat the engagement and disengagement of said overlapping reeds ends to establish make-circuits and break-circuits, respectively, between said input and output signaling circuits at said respective cross points, comprising: a plurality of unidirectional conductive diodes, each having at each of said cross points an anode connected to one of said input control lines and a cathode; two spaced magnetic cores located at leach of said cross points; a plurality of windings positioned at each of said cross points in such manner that first and second windings are wound on one of said two cores and a third winding is wound on the other of said two cores at each of said cross points; said first windings having corresponding one ends connected to said cathodes and having opposite ends as said first windings are aligned with said respective output control lines; said third windings having corresponding ends connected to said first windings opposite ends and having opposite ends connected to a common point as said latter first and third windings are aligned with said respective output control lines; said second windings so connected in series as to have one outermost end connected to said third windings common point and another outermost end joined to one of said output control lines as said latter first, second and third windings are aligned with each of said output control lines; whereby voltage effective at a preselected input control line and a preselected output control line causes current to flow in a circuit including said preselected input control line, said diode and said first and third windings at said preselected input and output control lines cross point, sAid series-connected second windings aligned with said preselected output control line, and said preselected output control line for simultaneously energizing said latter first, second and third windings to activate said one and other cores associated therewith in such manner that said one and other cores associated with said latter first and third windings wound in the same electrical sense on said respective latter one and other cores at said preselected input and output control lines cross point produce mutually aiding magnetic fields to move said overlapping reeds ends at said latter cross point into engagement to establish one of said make-circuits between said input and output signaling lines at said latter cross point while said second windings wound on said latter one cores in an electrical sense opposite to said third windings wound on said other cores at said respective cross points aligned with said preselected output control line produce magnetic fields opposing said magnetic fields produced by said latter third windings to disengage overlapping adjacent reeds ends as engaged at said latter cross points to establish said break-circuits between said input and output signaling circuits at said latter cross points without disturbing said engagement of said overlapping adjacent reeds ends at said preselected input and output control lines cross points.

Claim 17

Cross point switching apparatus, comprising in combination: a plurality of spaced parallel input signal lines; a plurality of spaced parallel output signaling lines crossing said input lines at right angles for providing cross-points therebetween; a plurality of switching devices, each positioned at one of said cross points and including two magnetic reeds disposed in side-by-side relation and having overlapping and movable adjacent ends normally disengaged and opposite ends connected to said respective input and output lines; a plurality of input control lines, each associated with one of said input signaling lines; a plurality of output control lines, each associated with one of said output signaling lines; and magnetic means connected to said input and output control lines at said respective cross points for controlling thereat the engagement and disengagement of said overlapping reeds ends to establish make-circuits and break-circuits, respectively, between said input and output signaling circuits at said respective cross points, comprising: a plurality of unidirectional conductive diodes, each having at each of said cross points an anode connected to one of said input control lines and a cathode; two spaced magnetic cores located at leach of said cross points; a plurality of windings positioned at each of said cross points in such manner that first and second windings are wound on one of said two cores and a third winding is wound on the other of said two cores at each of said cross points; said first windings having corresponding one ends connected to said cathodes and having opposite ends as said first windings are aligned with said respective output control lines; said third windings having corresponding ends connected to said first windings opposite ends and having opposite ends connected to a common point as said latter first and third windings are aligned with said respective output control lines; said second windings so connected in series as to have one outermost end connected to said third windings common point and another outermost end joined to one of said output control lines as said latter first, second and third windings are aligned with each of said output control lines; whereby voltage effective at a preselected input control line and a preselected output control line causes current to flow in a circuit including said preselected input control line, said diode and said first and third windings at said preselected input and output control lines cross point, sAid series-connected second windings aligned with said preselected output control line, and said preselected output control line for simultaneously energizing said latter first, second and third windings to activate said one and other cores associated therewith in such manner that said one and other cores associated with said latter first and third windings wound in the same electrical sense on said respective latter one and other cores at said preselected input and output control lines cross point produce mutually aiding magnetic fields to move said overlapping reeds ends at said latter cross point into engagement to establish one of said make-circuits between said input and output signaling lines at said latter cross point while said second windings wound on said latter one cores in an electrical sense opposite to said third windings wound on said other cores at said respective cross points aligned with said preselected output control line produce magnetic fields opposing said magnetic fields produced by said latter third windings to disengage overlapping adjacent reeds ends as engaged at said latter cross points to establish said break-circuits between said input and output signaling circuits at said latter cross points without disturbing said engagement of said overlapping adjacent reeds ends at said preselected input and output control lines cross points.