GB823075A - Magnetic memory apparatus - Google Patents
Magnetic memory apparatusInfo
- Publication number
- GB823075A GB823075A GB17974/56A GB1797456A GB823075A GB 823075 A GB823075 A GB 823075A GB 17974/56 A GB17974/56 A GB 17974/56A GB 1797456 A GB1797456 A GB 1797456A GB 823075 A GB823075 A GB 823075A
- Authority
- GB
- United Kingdom
- Prior art keywords
- elements
- disc
- read
- information
- armatures
- Prior art date
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
- H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
-
- 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
- G11C11/50—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using actuation of electric contacts to store the information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
- H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
823,075. Electric digital-data-storage apparatus. AUTOMATIC ELECTRIC LABORATORIES Inc. June 11, 1956 [July 19, 1955], No. 17974/56. Class 106 (1). A digital data storage device includes a storage medium comprising a non-magnetic member having a plurality of isolated magnetic elements embedded therein, relatively movable write-in means selectively energizable to induce magnetizations of a particular polarity in selected ones of said elements, and means for causing relative movement between the storage medium and read-out means. As shown, a non- magnetic circular disc 70 contains a number of magnetic elements 75 arranged in radial rows a1, a2, &c., and concentric circles W, X, Y, Z, all the elements being normally magnetized in one axial direction so as to repel permanent magnet armatures 93. The disc is rotatably mounted on a shaft 17 and is rotated in a counter-clockwise direction, as shown in Fig. 3, by an electromagnetically driven pawl-andratchet stepping mechanism, the rotary position being indicated by indicia 86. Four write-in heads 76W, 77X, 78Y, 79Z are in the form of electromagnets having polepieces 80 to 83 disposed on one side of the disc, four read-out devices being provided on the opposite side of the disc, the read-out devices comprising permanent magnet armatures 93 and normally open contacts 96 arranged on contact spring sets 87 to 90. An item of information is written into the store in a four-element binary code, the four magnetic elements 75 corresponding to one item being arranged one in each circle of elements in a spiral group such as on the spiral 100, Fig. 6. When the disc is in its initial rotary position the spirally-arranged write-in heads are selectively energized to change the magnetization polarity of the four elements associated therewith in accordance with the coded representation of the item of information to be stored. The disc is then stepped on by one and the next item of information is stored. In this way in a complete revolution of the disc a total number of items of information equal to the number of radial rows of elements 75 may be stored. The energizing circuit for the electromagnets 76W to 79Z are now opened and on a subsequent complete revolution of the disc, the information stored therein may be read out. When the first spiral group of elements 75 appears under the similarly arranged read-out armatures 93, the armatures associated with the reversed elements only will be attracted thereto to close contacts 96. On subsequent advancement of the disc by one position by the stepping mechanism, a new group of elements 75 will be brought into association with the armatures 93. In this way all the information stored in the disc may be read out. A group of elements which have been read may be cleared when advanced into association with the electromagnets 76W to 79Z by passing currents of opposite polarity to the writing currents through the electromagnets. Specification 805,599, [Group XXXIX], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1155638XA | 1955-07-19 | 1955-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB823075A true GB823075A (en) | 1959-11-04 |
Family
ID=45374485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17974/56A Expired GB823075A (en) | 1955-07-19 | 1956-06-11 | Magnetic memory apparatus |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE549516A (en) |
DE (1) | DE1030882B (en) |
FR (1) | FR1155638A (en) |
GB (1) | GB823075A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010109244A2 (en) | 2009-03-27 | 2010-09-30 | Lucite International Uk Limited | Process for the treatment of an ion exchange resin |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1092065B (en) * | 1958-10-13 | 1960-11-03 | Hermann Wetzer K G | Device for magnetic recording and playback of dialing pulses |
FR1220058A (en) * | 1958-12-22 | 1960-05-23 | Cie Crouzet | Automatic telephone call method for subscribers connected to an automatic telephone exchange and means for implementing this method |
DE1074660B (en) * | 1962-07-06 | 1960-02-04 | Krone Kommanditgesellschaft, Berlin-Zehlendorf | Automatic impulse transmitter with digit memory device, in particular for automatic telephone dialing systems |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2303918A (en) * | 1942-12-01 | Impulse transmission | ||
DE856462C (en) * | 1941-01-25 | 1952-11-20 | Siemens Ag | Circuit arrangement for telephone systems with dialer operation and surge storage devices |
NL164026B (en) * | 1950-12-16 | Rhone Poulenc Sa | PROCESS FOR PREPARING VITAMIN-A-ACID AND ESTERS THEREOF. | |
DE918450C (en) * | 1952-01-27 | 1954-09-27 | Siemens Ag | Switching mechanism for storing series of current impulses |
-
0
- BE BE549516D patent/BE549516A/xx unknown
-
1956
- 1956-06-11 GB GB17974/56A patent/GB823075A/en not_active Expired
- 1956-07-06 DE DEA25255A patent/DE1030882B/en active Pending
- 1956-07-12 FR FR1155638D patent/FR1155638A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010109244A2 (en) | 2009-03-27 | 2010-09-30 | Lucite International Uk Limited | Process for the treatment of an ion exchange resin |
Also Published As
Publication number | Publication date |
---|---|
BE549516A (en) | |
FR1155638A (en) | 1958-05-06 |
DE1030882B (en) | 1958-05-29 |
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