US3196522A - Memory core matrix with printed windings - Google Patents

Memory core matrix with printed windings Download PDF

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Publication number
US3196522A
US3196522A US81185A US8118561A US3196522A US 3196522 A US3196522 A US 3196522A US 81185 A US81185 A US 81185A US 8118561 A US8118561 A US 8118561A US 3196522 A US3196522 A US 3196522A
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United States
Prior art keywords
cores
fingers
conductor segments
insulating
slots
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US81185A
Inventor
Joseph M Bernstein
George J David
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Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL268251D priority Critical patent/NL268251A/xx
Priority to US51746A priority patent/US3133270A/en
Priority to US51688A priority patent/US3197746A/en
Priority to US65462A priority patent/US3492665A/en
Priority to US81185A priority patent/US3196522A/en
Application filed by Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Priority to GB25666/61A priority patent/GB918000A/en
Priority to BE606130A priority patent/BE606130A/en
Priority to DEA38061A priority patent/DE1257847B/en
Priority to US428365A priority patent/US3413620A/en
Application granted granted Critical
Publication of US3196522A publication Critical patent/US3196522A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C5/00—Details of stores covered by group G11C11/00
    • G11C5/02—Disposition of storage elements, e.g. in the form of a matrix array
    • G11C5/04—Supports for storage elements, e.g. memory modules; Mounting or fixing of storage elements on such supports
    • G11C5/05—Supporting of cores in matrix
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/06—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C5/00—Details of stores covered by group G11C11/00
    • G11C5/02—Disposition of storage elements, e.g. in the form of a matrix array
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49069—Data storage inductor or core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing

Definitions

  • This invention relates to magnetic devices and more particularly, to magnetic core matrices using printed circuitry.
  • the primary object of this invention is to reduce the cost of manufacture through simplifying the method of assembling magnetic devices of the general type disclosed herein.
  • Another object of this invention is to produce a magnetic device which lends itself to greater flexibility and word potential in a memory system.
  • the disclosure features in general a plurality of fiat insulating members which are stacked together in a manner such that they support a plurality of cores located therein.
  • Printed conductor segments are disposed on the surface of these insulating members in such a manner that the ends of the conductor segments of one member overlap the ends of the conductor segments of an adjacent member and form a continuous electrical winding. These windings extend through and about the cores and conform to patterns determined by the function desired therefrom. Thus, a printed winding between two cards may serve one function, and a printed winding between two other cards may serve another function.
  • FIGURE 1 is an exploded perspective view showing the position of the components of a first embodiment of the invention prior to assembly.
  • FIGURE 2 is an exploded perspective view showing the position of the components of a second embodiment prior to assembly.
  • FIGURE 3 is a perspective view showing the assembled magnetic device according to the first embodiment.
  • FIGURE 4 is an end view of the assembled device as shown in FIG. 3 showing the pressure blocks and the heating elements contained therein, which are used in the assembly operation.
  • the memory core matrix there shown includes insulating members 1t) and 13, ring cores 12, and printed conductor segments 15.
  • Card is a fiat and rectangular shaped sheet made of insulating material such as a plastic, and having a plurality of rectangular slots or apertures 11.
  • Key member 13 is also made of insulating material and used in combination with card 10. Its configuration is comb shaped with parallel fingers 14 projecting from a common base portion or yoke. The fingers are spaced apart a dis- 3,196,522 Patented July 27, 1965 "ice tance equal to the spacing between the rows of ring cores and are the means used to thread the cores with a conductor.
  • key member 13 for example, is placed against card 11
  • the cores on the fingers are locked into position and prevented from falling out of the apertures 11.
  • the aforementioned conductor segments 15 are prefererably solder coated for the reason explained subsequently.
  • the conductor segments are preferably applied to the two different insulating members in the same manner and by any one of a number of processes used in the field of printed circuitry for example, by an etching process.
  • the segments on the key member lie in one direction and those on the card lie in a direction substantially perpendicular to the first-mentioned direction to enable the ends of the segments on one member to contact and overlap with the ends of the segments on the other member and thereby provide a continuous winding between and through the cores.
  • These windings may, for example, serve as a horizontal winding, a vertical winding, or a sense winding to a magnetic core memory.
  • a preliminarystep of the preferred methodof manufacture may be to place the ring cores 12 into depressions of jig 16. This step temporarily supports the cores as well as arranges them in a matrix pattern.
  • card 10 is placed over the cores so that the rectangular shaped apertures surround the cores. This is followed by positioning key member 13 parallel with card 10 so that the extending fingers 14 thereof are aligned with the apertures 11 of the magnetic cores 12. Key member 13 is then moved transversely until the fingers 14 extend completely through the array of cores and lie adjacent to card 10. This procedure is followed again until the desired number of cards and key members are stacked together forming substantially a laminated block.
  • the block thusly formed is then subjected to heat and pressure by means of a heat element 17 and a pres sure block 18 shown in FIGURE 4 or similar means so that the solder coating on the printed conductor segments 15 on both insulating members 10 and 13 flows into a continuous winding at points where the segments of one member overlap the segments of an adjacent member.
  • a heat element 17 and a pres sure block 18 shown in FIGURE 4 or similar means so that the solder coating on the printed conductor segments 15 on both insulating members 10 and 13 flows into a continuous winding at points where the segments of one member overlap the segments of an adjacent member.
  • insulating members 10 and 13 are held in a stacked relationship or a laminated block form and the cores 12 are secured therein.
  • the assembly is then removed from the jig.
  • a second embodiment of the device uses substantially the same method of manufacture as required with the embodiment shown in FIG. 1.
  • the insulating members all have parallel fingers which project perpendicular to a common base or yoke and conductor segments (not shown) are applied to these fingers by printed circuit techniques, so that conductor segments carried by one insulating member are completed by conductor segments of an adjacent card.
  • the magnetic ring cores 12 may he slipped over the extending fingers of insulating member 13 and locked into position through the placement of insulating member 19 adjacent to it. Therefore, the fingers on one key member extend through the core apertures and thereby thread a conductor segment through them, and the fingers of an adjacent insulating member extend alongside the cores; the combination thereof provides complete securernent of the cores and also the necessary electrical winding.
  • This arrangement may be suitable in certain applications where more uniformity in the shape of the insulating. members is desirable.
  • said I other insulating member is in the form of a card, wherein least one of said members being substantially in the form v of a comb having a base portion and a plurality of fingers 7 extending from said portion to carry said cores and the other insulating member having a plurality of parallel slots, said method comprising the steps of (-1) applying conductorsegments along the fingers of said comb-shaped member and applying other conductor-segments to the other insulating'mernber in a direction substantially perpendicular to the conductor segments on said fingers and parallel to said slots, 2) assembling said cores with respect to saidvfingers with said fingers'extending' through" said slots are in the form of rectangular openings in said card, and wherein the spacing of said fingers corresponds to the spacing of said slots in a direction lengthwise 2,985,948 4 5/671 Peters 29-4555 WHITMORE A. 'WILTZ, Primary E et. JOHN F. BURNS

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Electromagnets (AREA)
  • Credit Cards Or The Like (AREA)

Description

y 1965 J. M. BERNSTEIN ETAL 3,196,522
MEMORY CORE MATRIX WITH PRINTED WINDINGS Filed Jan. 6. 1961 INVENTORS Joseph M. Bernslein BY George J. David Affy.
United States Patent 3,196,522 MEMORY CORE MATRIX WITH PRINTED WltNDlNGS Joseph M. Bernstein, liensenville, and George .1. David,
Chicago, Ill., assignors to Automatic Electric Laboratories, Inc., Northlake, Ili., a corporation of Delaware Fiied Jan. 6, 1961, Ser. No. 81,185 2 Claims. (Cl. 29-1555) This invention relates to magnetic devices and more particularly, to magnetic core matrices using printed circuitry.
Copending applications; Method of Producing A Memory Gore Array by Stoehr, Rudolph O. and Liston, John W., Serial No. 51,688 filed August 24, 1960, and Printed Circuitry for Magnetic Matrix by David, George 1., Serial No. 51,746 filed August 24, 1960, and now Patent No. 3,133,270, both having the present assignee disclose core matrices that comprise a plurality of cards having apertures with lips extending therein to secure and support the magnetic cores. The present invention further develops the technique according to these prior applications by the use of cards having apertures and key members having extending fingers to lock the magnetic cores into position. This latter technique discloses a uniquely simple approach to the production of magnetic core matrices.
The primary object of this invention is to reduce the cost of manufacture through simplifying the method of assembling magnetic devices of the general type disclosed herein.
Another object of this invention is to produce a magnetic device which lends itself to greater flexibility and word potential in a memory system.
The disclosure features in general a plurality of fiat insulating members which are stacked together in a manner such that they support a plurality of cores located therein. Printed conductor segments are disposed on the surface of these insulating members in such a manner that the ends of the conductor segments of one member overlap the ends of the conductor segments of an adjacent member and form a continuous electrical winding. These windings extend through and about the cores and conform to patterns determined by the function desired therefrom. Thus, a printed winding between two cards may serve one function, and a printed winding between two other cards may serve another function. Other objects and features of this invention will become apparent from a perusal of the following detailed description.
FIGURE 1 is an exploded perspective view showing the position of the components of a first embodiment of the invention prior to assembly.
FIGURE 2 is an exploded perspective view showing the position of the components of a second embodiment prior to assembly.
FIGURE 3 is a perspective view showing the assembled magnetic device according to the first embodiment.
FIGURE 4 is an end view of the assembled device as shown in FIG. 3 showing the pressure blocks and the heating elements contained therein, which are used in the assembly operation.
Referring now to FIGS. 1 and 3 of the drawings, the memory core matrix there shown includes insulating members 1t) and 13, ring cores 12, and printed conductor segments 15. Card is a fiat and rectangular shaped sheet made of insulating material such as a plastic, and having a plurality of rectangular slots or apertures 11. Key member 13 is also made of insulating material and used in combination with card 10. Its configuration is comb shaped with parallel fingers 14 projecting from a common base portion or yoke. The fingers are spaced apart a dis- 3,196,522 Patented July 27, 1965 "ice tance equal to the spacing between the rows of ring cores and are the means used to thread the cores with a conductor. Moreover, when key member 13, for example, is placed against card 11) the cores on the fingers are locked into position and prevented from falling out of the apertures 11.
The aforementioned conductor segments 15 are prefererably solder coated for the reason explained subsequently. The conductor segments are preferably applied to the two different insulating members in the same manner and by any one of a number of processes used in the field of printed circuitry for example, by an etching process. The segments on the key member lie in one direction and those on the card lie in a direction substantially perpendicular to the first-mentioned direction to enable the ends of the segments on one member to contact and overlap with the ends of the segments on the other member and thereby provide a continuous winding between and through the cores. These windings may, for example, serve as a horizontal winding, a vertical winding, or a sense winding to a magnetic core memory.
A preliminarystep of the preferred methodof manufacture may be to place the ring cores 12 into depressions of jig 16. This step temporarily supports the cores as well as arranges them in a matrix pattern.
Next, card 10 is placed over the cores so that the rectangular shaped apertures surround the cores. This is followed by positioning key member 13 parallel with card 10 so that the extending fingers 14 thereof are aligned with the apertures 11 of the magnetic cores 12. Key member 13 is then moved transversely until the fingers 14 extend completely through the array of cores and lie adjacent to card 10. This procedure is followed again until the desired number of cards and key members are stacked together forming substantially a laminated block. The block thusly formed is then subjected to heat and pressure by means of a heat element 17 and a pres sure block 18 shown in FIGURE 4 or similar means so that the solder coating on the printed conductor segments 15 on both insulating members 10 and 13 flows into a continuous winding at points where the segments of one member overlap the segments of an adjacent member. As a result continuous windings are formed and at the same time insulating members 10 and 13 are held in a stacked relationship or a laminated block form and the cores 12 are secured therein. The assembly is then removed from the jig.
A second embodiment of the device, as shown in FIG. 2, uses substantially the same method of manufacture as required with the embodiment shown in FIG. 1. According to this embodiment the insulating members all have parallel fingers which project perpendicular to a common base or yoke and conductor segments (not shown) are applied to these fingers by printed circuit techniques, so that conductor segments carried by one insulating member are completed by conductor segments of an adjacent card.
The magnetic ring cores 12 according to this embodiment may he slipped over the extending fingers of insulating member 13 and locked into position through the placement of insulating member 19 adjacent to it. Therefore, the fingers on one key member extend through the core apertures and thereby thread a conductor segment through them, and the fingers of an adjacent insulating member extend alongside the cores; the combination thereof provides complete securernent of the cores and also the necessary electrical winding. This arrangement may be suitable in certain applications where more uniformity in the shape of the insulating. members is desirable.
This invention has been described in detail, however,
it is understood that the present disclosure has been made a only by Way'of exampletand numberous changes in the. detail and structure may be made without departing),
from the scope of my invention as hereinafter claimed.
The features relating to the apparatus disclosed herein are claimed in a copending divisional applicationfSeria l No. 428,365 filed January 27, 1 965. tWhat is claimed is: 7
i 1. The method of producing 'a magnetic *memory de vice comprising a plurality of magnetic ring cores and comprising a pair of relativelytflat insulating members, at
s aid cores, and (3): stacking said two'insulating members one immediately on top of the other so, that said cores are locked in position in said slots and. said conductor segments are formed'into continuous windings extending through and between said cores. V
. 2. The methodas claimed in claim 1 wherein said I other insulating member is in the form of a card, wherein least one of said members being substantially in the form v of a comb having a base portion and a plurality of fingers 7 extending from said portion to carry said cores and the other insulating member having a plurality of parallel slots, said method comprising the steps of (-1) applying conductorsegments along the fingers of said comb-shaped member and applying other conductor-segments to the other insulating'mernber in a direction substantially perpendicular to the conductor segments on said fingers and parallel to said slots, 2) assembling said cores with respect to saidvfingers with said fingers'extending' through" said slots are in the form of rectangular openings in said card, and wherein the spacing of said fingers corresponds to the spacing of said slots in a direction lengthwise 2,985,948 4 5/671 Peters 29-4555 WHITMORE A. 'WILTZ, Primary E et. JOHN F. BURNS, JOHNV'FQCAMPBELL, Examiners.

Claims (1)

1. THE METHOD OF PRODUCING A MAGNETIC MEMORY DEVICE COMPRISING A PLURALITY OF MAGNETIC RING CORES AND COMPRISING A PAIR OF RELATIVELY FLAT INSULATING MEMBERS, AT LEAST ONE OF SAID MEMBERS BEING SUBSTANTIALLY IN THE FORM OF A COMB HAVING A BASE PORTION AND A PLURALITY OF FINGERS EXTENDING FROM SAID PORTION TO CARRY SAID CORES AND THE OTHER INSULATING MEMBER HAVING A PLURALITY OF PARALLEL SLOTS, SAID METHOD COMPRISING THE STEPS OF (1) APPLYING CONDUCTOR SEGMENTS ALONG THE FINGERS OF SAID COMB-SHAPED MEMBER AND APPLYING OTHER CONDUCTOR SEGMENTS TO THE OTHER INSULATING MEMBER IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE CONDUCTOR SEGMENTS ON SAID FINGERS AND PARALLEL TO SAID SLOTS, (2) ASSEMBLING SAID CORES WITH RESPECT TO SAID FINGERS WITH SAID FINGERS EXTENDING THROUGH SAID CORES, AND (3) STACKING SAID TWO INSULATING MEMBERS ONE IMMEDIATELY ON TOP OF THE OTHER SO THAT SAID CORES ARE LOCKED IN POSITION IN SAID SLOTS AND SAID CONDUCTOR SEGMENTS ARE FORMED INTO CONTINUOUS WINDINGS EXTENDING THROUGH AND BETWEEN SAID CORES.
US81185A 1960-08-24 1961-01-06 Memory core matrix with printed windings Expired - Lifetime US3196522A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
NL268251D NL268251A (en) 1960-08-24
US51688A US3197746A (en) 1960-08-24 1960-08-24 Memory core assembly
US51746A US3133270A (en) 1960-08-24 1960-08-24 Printed circuitry for magnetic core matrix
US65462A US3492665A (en) 1960-08-24 1960-10-27 Magnetic device using printed circuits
US81185A US3196522A (en) 1960-08-24 1961-01-06 Memory core matrix with printed windings
GB25666/61A GB918000A (en) 1960-08-24 1961-07-14 Improvements in magnetic memory devices
BE606130A BE606130A (en) 1960-08-24 1961-07-14 Magnetic memory device
DEA38061A DE1257847B (en) 1960-08-24 1961-08-04 Magnetic core memory
US428365A US3413620A (en) 1960-08-24 1965-01-27 Memory core matrix with printed windings

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US51688A US3197746A (en) 1960-08-24 1960-08-24 Memory core assembly
US51746A US3133270A (en) 1960-08-24 1960-08-24 Printed circuitry for magnetic core matrix
US6546260A 1960-10-27 1960-10-27
US81185A US3196522A (en) 1960-08-24 1961-01-06 Memory core matrix with printed windings

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US3196522A true US3196522A (en) 1965-07-27

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US51688A Expired - Lifetime US3197746A (en) 1960-08-24 1960-08-24 Memory core assembly
US51746A Expired - Lifetime US3133270A (en) 1960-08-24 1960-08-24 Printed circuitry for magnetic core matrix
US65462A Expired - Lifetime US3492665A (en) 1960-08-24 1960-10-27 Magnetic device using printed circuits
US81185A Expired - Lifetime US3196522A (en) 1960-08-24 1961-01-06 Memory core matrix with printed windings

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US51688A Expired - Lifetime US3197746A (en) 1960-08-24 1960-08-24 Memory core assembly
US51746A Expired - Lifetime US3133270A (en) 1960-08-24 1960-08-24 Printed circuitry for magnetic core matrix
US65462A Expired - Lifetime US3492665A (en) 1960-08-24 1960-10-27 Magnetic device using printed circuits

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US (4) US3197746A (en)
BE (1) BE606130A (en)
DE (1) DE1257847B (en)
GB (1) GB918000A (en)
NL (1) NL268251A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273134A (en) * 1962-09-28 1966-09-13 Rca Corp Printed circuit assemblies of magnetic cores
US3328782A (en) * 1965-05-03 1967-06-27 Bell Telephone Labor Inc Magnetic memory assembly
US3377699A (en) * 1965-05-03 1968-04-16 Western Electric Co Fluidized bed coating a core containing metal board, including circuit forming, core wiring and connecting steps
US3391464A (en) * 1966-02-25 1968-07-09 Bunker Ramo Assembly tool
US3427715A (en) * 1966-06-13 1969-02-18 Motorola Inc Printed circuit fabrication
US3439109A (en) * 1961-09-29 1969-04-15 Emi Ltd Thin film magnetic stores using printed electric circuits
US3521248A (en) * 1964-01-27 1970-07-21 Hollandse Signaalapparaten Bv Semipermanent magnetic core storage devices
US3543397A (en) * 1965-05-03 1970-12-01 Bell Telephone Labor Inc Magnetic memory assembly method
US3591922A (en) * 1968-12-05 1971-07-13 Sperry Rand Corp Fabrication of electrical solder joints using electrodeposited solder
US3893189A (en) * 1974-01-14 1975-07-01 Spin Physics Inc Magnetic record/reproduce head and manufacturing method therefor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1295653B (en) * 1965-07-17 1969-05-22 Telefunken Patent Arrangement for the magnetic storage, connection or logical linking of information and methods for operating the arrangement, for generating the anisotropy and for its production
DE1764812A1 (en) * 1968-08-09 1971-11-11 Vickers Zimmer Ag Method of manufacturing a magnetic memory element
US3573762A (en) * 1969-01-28 1971-04-06 Us Navy 3-wire coincident current core memory
US3680209A (en) * 1969-05-07 1972-08-01 Siemens Ag Method of forming stacked circuit boards
US3765082A (en) * 1972-09-20 1973-10-16 San Fernando Electric Mfg Method of making an inductor chip
TWI399139B (en) * 2007-09-19 2013-06-11 Ind Tech Res Inst Meander inductor and printed circuit board with a meander inductor
CN114746966B (en) * 2019-12-18 2024-03-08 永磁有限公司 Magnetic core assembly and process for manufacturing the same

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US2901736A (en) * 1955-08-23 1959-08-25 Steatite Res Corp Printed circuit for array of toroidal cores
US2934748A (en) * 1957-01-31 1960-04-26 United Shoe Machinery Corp Core mounting means
US2961745A (en) * 1955-12-29 1960-11-29 Ibm Device for assembling magnetic core array
US2985948A (en) * 1955-01-14 1961-05-30 Rca Corp Method of assembling a matrix of magnetic cores

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US2988668A (en) * 1954-10-05 1961-06-13 Burroughs Corp High speed memory
US2897409A (en) * 1954-10-06 1959-07-28 Sprague Electric Co Plating process
US2970296A (en) * 1955-05-10 1961-01-31 Ibm Printed circuit ferrite core memory assembly
US2937351A (en) * 1956-02-13 1960-05-17 Palmer H Craig Magnetic amplifier
NL112668C (en) * 1956-03-22
NL113004C (en) * 1956-10-03
US3027548A (en) * 1956-12-17 1962-03-27 Bell Telephone Labor Inc Electromagnetic coupling arrangements
US2910675A (en) * 1957-01-09 1959-10-27 Ibm Core array using coaxially spaced conductors
NL234583A (en) * 1957-12-31
US3025502A (en) * 1959-01-19 1962-03-13 Burroughs Corp Magnetic core memory construction
NL130691C (en) * 1959-05-21

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Publication number Priority date Publication date Assignee Title
US2985948A (en) * 1955-01-14 1961-05-30 Rca Corp Method of assembling a matrix of magnetic cores
US2901736A (en) * 1955-08-23 1959-08-25 Steatite Res Corp Printed circuit for array of toroidal cores
US2961745A (en) * 1955-12-29 1960-11-29 Ibm Device for assembling magnetic core array
US2934748A (en) * 1957-01-31 1960-04-26 United Shoe Machinery Corp Core mounting means

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3439109A (en) * 1961-09-29 1969-04-15 Emi Ltd Thin film magnetic stores using printed electric circuits
US3273134A (en) * 1962-09-28 1966-09-13 Rca Corp Printed circuit assemblies of magnetic cores
US3521248A (en) * 1964-01-27 1970-07-21 Hollandse Signaalapparaten Bv Semipermanent magnetic core storage devices
US3328782A (en) * 1965-05-03 1967-06-27 Bell Telephone Labor Inc Magnetic memory assembly
US3377699A (en) * 1965-05-03 1968-04-16 Western Electric Co Fluidized bed coating a core containing metal board, including circuit forming, core wiring and connecting steps
US3543397A (en) * 1965-05-03 1970-12-01 Bell Telephone Labor Inc Magnetic memory assembly method
US3391464A (en) * 1966-02-25 1968-07-09 Bunker Ramo Assembly tool
US3427715A (en) * 1966-06-13 1969-02-18 Motorola Inc Printed circuit fabrication
US3591922A (en) * 1968-12-05 1971-07-13 Sperry Rand Corp Fabrication of electrical solder joints using electrodeposited solder
US3893189A (en) * 1974-01-14 1975-07-01 Spin Physics Inc Magnetic record/reproduce head and manufacturing method therefor

Also Published As

Publication number Publication date
GB918000A (en) 1963-02-13
DE1257847B (en) 1968-01-04
BE606130A (en) 1961-11-03
NL268251A (en)
US3133270A (en) 1964-05-12
US3492665A (en) 1970-01-27
US3197746A (en) 1965-07-27

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