US3879585A — Single wall domain memory arrangement

Claim 1

Independent Claim 118 words

Magnetic apparatus comprising a layer of material in which single wall domains can be moved, and a pattern of elements coupled to said layer for defining therein a plurality of minor loops and a major path for the movement of domains therealong responsive to a magnetic field reorienting in the plane of said layer, said minor loops being closely spaced with respect to associated stages of said major path at control positions therebetween, first means for controllably annihilating domains at a selected one of said control positions, second means for controllably replicating domains at a selected one of said control positions, and means responsive to first and second control signals for activating said first and second means, respectively.

Claim 2

Dependent Claim 118 words

Magnetic apparatus comprising a layer of material in which single wall domains can be moved, and a pattern of elements coupled to said layer for defining therein a plurality of minor loops and a major path for the movement of domains therealong responsive to a magnetic field reorienting in the plane of said layer, said minor loops being closely spaced with respect to associated stages of said major path at control positions therebetween, first means for controllably annihilating domains at a selected one of said control positions, second means for controllably replicating domains at a selected one of said control positions, and means responsive to first and second control signals for activating said first and second means, respectively.

Claim 3

Dependent Claim 118 words

Magnetic apparatus comprising a layer of material in which single wall domains can be moved, and a pattern of elements coupled to said layer for defining therein a plurality of minor loops and a major path for the movement of domains therealong responsive to a magnetic field reorienting in the plane of said layer, said minor loops being closely spaced with respect to associated stages of said major path at control positions therebetween, first means for controllably annihilating domains at a selected one of said control positions, second means for controllably replicating domains at a selected one of said control positions, and means responsive to first and second control signals for activating said first and second means, respectively.

Claim 4

Dependent Claim 118 words

Magnetic apparatus comprising a layer of material in which single wall domains can be moved, and a pattern of elements coupled to said layer for defining therein a plurality of minor loops and a major path for the movement of domains therealong responsive to a magnetic field reorienting in the plane of said layer, said minor loops being closely spaced with respect to associated stages of said major path at control positions therebetween, first means for controllably annihilating domains at a selected one of said control positions, second means for controllably replicating domains at a selected one of said control positions, and means responsive to first and second control signals for activating said first and second means, respectively.

Claim 5

Dependent Claim 66 words

Magnetic apparatus in accordance with claim 1 also including a multistage expansion detector arrangement including a detector stage, said major path being of a geometry to move domains to said detector stage, each of said minor loops having a first number of stages, said major loop including an output portion between said detector stage and the nearest of said minor loops greater than said first number.

Claim 6

Dependent Claim 61 words

Magnetic apparatus in accordance with claim 2 wherein said major path includes an input portion having a plurality of input stages, and electrical conductor means including a plurality of electrical conductors connected electrically in series at said stages and being of a geometry to generate there a number of domains representative of the one of said plurality of electrical conductors pulsed.

Claim 7

Dependent Claim 51 words

Magnetic apparatus in accordance with claim 3 wherein each of said plurality of conductors is coupled to said layer in a manner to generate a queuing domain in an associated stage of said expansion detector arrangement a coded distance from said detector stage indicative of the one of said conductors pulsed.

Claim 8

Dependent Claim 32 words

Magnetic apparatus in accordance with claim 4 also including means responsive to a pulse in one of said plurality of conductors for activating said drive field for advancing domains in said layer.

Claim 9

Dependent Claim 24 words

Magnetic apparatus in accordance with claim 5 for terminating said drive field responsive to the arrival of said queuing domain at said detector stage.

Claim 10

Dependent Claim 99 words

Magnetic apparatus in accordance with claim 6 wherein said pattern of elements also defines a multistage spur track for advancing domains through a replication stage to an annihilator, said plurality of conductors being coupled to said layer at associated stages of said spur track and being adapted to generate a domain in a coded stage therein indicative of the one of said plurality of conductors pulsed, said spur track being arranged to advance a domain from said coded stage to said replicate position during the advancement of said code domain in said expansion detector arrangement to said detector stage.

Claim 11

Dependent Claim 149 words

Magnetic apparatus in accordance with claim 7 in combination with a plurality of repertory push buttons, wherein said first and said second means comprises a plurality of conductors coupled to associated ones of said control positions, each of said push buttons being associated with one of said conductors of said first and second means for replicating information from a selected one of said minor loops into said major path, means responsive to the depression of one of said repertory buttons for advancing domains in said layer at a first relatively fast rate, means responsive to the arrival of a domain at said detector stage for advancing domains in said layer at a controlled relatively slow rate, and means responsive to the passage of a number of domains through said detector stage for forming an output pulse sequence indicative of the number of domains generated by said electrical conductor means.

Claim 12

Dependent Claim 135 words

A magnetic memory arrangement comprising a layer in which single wall domains can be moved, a pattern of elements for moving domains in said layer responsive to a magnetic field reorienting in the plane of said layer, said pattern defining a plurality of minor channels and a major channel, said pattern also defining a multistage expansion detector arrangement, a plurality of electrical conductors coupled to said layer at associated ones of said stages of said detector arrangement and being connected electrically in series to said layer at consecutive write positions in said major channel, said conductors being operative to generate a coded number of domains in said major channel and to simultaneously generate a domain in a coded one of said stages of said expansion detector arrangement depending on which of said conductors is pulsed.

Claim 13

Dependent Claim 135 words

A magnetic memory arrangement comprising a layer in which single wall domains can be moved, a pattern of elements for moving domains in said layer responsive to a magnetic field reorienting in the plane of said layer, said pattern defining a plurality of minor channels and a major channel, said pattern also defining a multistage expansion detector arrangement, a plurality of electrical conductors coupled to said layer at associated ones of said stages of said detector arrangement and being connected electrically in series to said layer at consecutive write positions in said major channel, said conductors being operative to generate a coded number of domains in said major channel and to simultaneously generate a domain in a coded one of said stages of said expansion detector arrangement depending on which of said conductors is pulsed.

Claim 14

Dependent Claim 158 words

A magnetic memory arrangement comprising a layer of material in which single wall domains can be moved, a pattern of elements for moving domains in said layer responsive to a magnetic field reorienting in the plane of said layer, said pattern defining a plurality of multistage minor channels each including a reference position and a multistage major channel, including a plurality of write positions, said pattern also defining a multistage spur track arrangement including a reference position, a plurality of electrical conductors coupled to said layer at associated ones of said stages of said spur track arrangement and being connected electrically in series to said layer at said consecutive write positions in said major channel, said conductors being operative when pulsed to generate a coded number of domains in said write positions and to simultaneously generate a domain in a coded one of said stages of said spur track arrangement depending on which of said conductors is pulsed.

Claim 15

Dependent Claim 158 words

A magnetic memory arrangement comprising a layer of material in which single wall domains can be moved, a pattern of elements for moving domains in said layer responsive to a magnetic field reorienting in the plane of said layer, said pattern defining a plurality of multistage minor channels each including a reference position and a multistage major channel, including a plurality of write positions, said pattern also defining a multistage spur track arrangement including a reference position, a plurality of electrical conductors coupled to said layer at associated ones of said stages of said spur track arrangement and being connected electrically in series to said layer at said consecutive write positions in said major channel, said conductors being operative when pulsed to generate a coded number of domains in said write positions and to simultaneously generate a domain in a coded one of said stages of said spur track arrangement depending on which of said conductors is pulsed.

Claim 16

Dependent Claim 93 words

A magnetic memory in accordance with claim 10 wherein said major loop includes a detector stage and said conductors are coupled to coded stages in said major loop spaced coded numbers of stages from said detector stage in a manner to generate a domain in one of said coded stages indicative of the conductor pulsed, said memory also including means responsive to a pulse in one of said conductors for activating said magnetic field, and means responsive to the arrival of a coded domain at said detector stage for deactivating said magnetic field.

Claim 17

Dependent Claim 87 words

A magnetic memory in accordance with claim 11 including means responsive to a first external signal for providing a domain in a stage of said major channel associated with said reference position of sAid spur track arrangement if a domain is present in said spur track arrangement at said reference position, means responsive to said first external signal for activating said magnetic field, and means responsive to said first external signal for annihilating domains in a selected one of said minor channels at the associated reference position.

Claim 18

Dependent Claim 42 words

A magnetic memory in accordance with claim 12 wherein said memory also includes means responsive to the arrival of a domain from said associated stage of said major path at said detector stage for terminating annihilation of domains at said minor channel.

Claim 19

Dependent Claim 48 words

A magnetic memory in accordance with claim 13 wherein said reference position of said spur track comprises a replicate position for replicating a domain into the associated position of said major channel and said spur track arrangement includes an annihilator for annihilating domains which pass said replicate position.

Claim 20

Dependent Claim 45 words

A magnetic memory in accordance with claim 14 wherein said write positions in said major channel are separated from the closest of said minor channels by a number of stages greater than that separating said associated position in said major channel from said detector stage.

Claim 21

Dependent Claim 50 words

A magnetic memory in accordance with claim 15 also including means responsive to the arrival at said detector stage of a domain from said associated position of said major channel for replicating domains from said major channel into a selected minor channel at said reference position in said minor channel.

Claim 22

Dependent Claim 72 words

A magnetic memory in accordance with claim 16 wherein said reference position in each of said minor channels is defined by said pattern of elements and an electrical conductor operative to annihilate or replicate domains there, and said memory includes means responsive to the arrival of a domain from said associated position of said major channel at said detector stage for changing the operation at said reference position from annihilation to replication.

Claim 23

Dependent Claim 32 words

A magnetic memory in accordance with claim 17 wherein said minor channels are recirculating loops for recirculating domain patterns representative of information through associated reference positions in response to said magnetic field.

Claim 24

Dependent Claim 45 words

A magnetic memory in accordance with claim 18 wherein said recirculating domain patterns are representative of stored telephone numbers and said magnetic field is activated by power supplied over telephone lines from a central office through a station set and enabled by a subscriber-activated signal.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-04-21	1978-10-21	1979-04-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-04-21	1982-10-21	1983-04-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-04-21	1986-10-21	1987-04-22	$7700.00	Window Closed / Lapsed

Single wall domain memory arrangement

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