US3676857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data storage systems
Assignee: Fujitsu Services Ltd
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Filing: 1970-08-12
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Granted: 1972-07-11
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Expires: 1990-08-12
Abstract
Abstract A system for storing data in which data is read out of and written into a large, addressable, bulk store by means of an immediate access store. An associative store is initially loaded with address information and upon a signal from a central processor unit, the address information is read out of the associative store to a test unit which calculates a desired address in the bulk store. The address is then applied to an address selection circuit which allows data to be read out of or written into a desired storage location in the bulk store.
Inventors
- 👤 Howard Rodney Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:37
CPC Classifications
G; G06; G06F; G06F16/00; G06F16/90; G06F16/903; G06F16/90335; G06F16/90339
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A digital system for storing data records including a bulk storage system with a plurality of addressable storage locations for data records; an associative memory system with a plurality of addressable storage locations for storing address information characteristic of each of the data records stored in the bulk storage system; means for storing data records in the bulk storage system; means for concurrently storing in the associative memory system address information characteristic of each bulk storage location having a data record stored therein; means responsive to an access request relating to at least part of a data record stored in the bulk store to interrogate only the associative memory system to provide the address information of the reqested data record stored in the bulk storage system; and means responsive to the address information provided by the associative memory to read out from the bulk storage system the data record specified by the access request.
Claim 2
Dependent Claim
154 words
A digital system for storing data records including a bulk storage system with a plurality of addressable storage locations for data records; an associative memory system with a plurality of addressable storage locations for storing address information characteristic of each of the data records stored in the bulk storage system; means for storing data records in the bulk storage system; means for concurrently storing in the associative memory system address information characteristic of each bulk storage location having a data record stored therein; means responsive to an access request relating to at least part of a data record stored in the bulk store to interrogate only the associative memory system to provide the address information of the reqested data record stored in the bulk storage system; and means responsive to the address information provided by the associative memory to read out from the bulk storage system the data record specified by the access request.
Claim 3
Dependent Claim
64 words
A system as claimed in claim 1 in which said means responsive to said information provided by the associative memory system includes a test unit which receives said address information relating to the requested data record as an input and an address selection circuit which is responsive to the output of said test unit to select a storage location in said bulk storage system.
Claim 4
Dependent Claim
70 words
A system as claimed in claim 2, in which said test unit includes; means for receiving as a first input said access request; means for receiving as a second input said address information provided by the associative memory system; and means for deriving from said first and second inputs an output comprising the address in said bulk storage system corresponding to said address information provided by the associative memory system.
Claim 5
Dependent Claim
49 words
A system as claimed in claim 3 in which said means for storing data records in the bulk storage system includes an immediate access store and a data input/output device, the output of said immediate access store being applied through said data input/output device to said bulk storage system.
Claim 6
Dependent Claim
33 words
A system as claimed in claim 3 in which the test unit includes means to calculate an address in said bulk storage system from the address information read out of the associative memory.
Claim 7
Dependent Claim
52 words
A system as claimed in claim 3, in which the test unit includes means to compare the information read out of the associative memory system relating to a specified address location in the bulk storage system, and an input from a central processing unit to produce the output from the test unit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |