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US3704451A
Expired / Lapsed
US
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Automatic data retrieval and display system
Assignee: Texas Instruments Inc
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Filing: 1971-01-05
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Granted: 1972-11-28
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Expires: 1991-01-05
Abstract
Abstract An automatic data retrieval and display system is disclosed wherein solid state logic, motor drives and solenoid drives are utilized. Logic and drive circuitry control operation of a rotary file to rapidly select a desired data item from the file and accurately position it for display. Transistorized d.c. isolator circuit means isolate logic signals from a.c. drive power while servo positioning circuits effect positioning of the data item for display with maximum speed. A timing circuit provides a reset signal after a programmable delay.
Inventors
- 👤 Samuel Reader Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:51
CPC Classifications
G; G06; G06K; G06K17/00; G06K17/0016
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A high speed data retrieval and display system comprising: a. data storage means for storing a plurality of data items; b. selector means for addressing a preselected data item; c. alternating current drive means for sequentially scanning said data items with said selector means; and d. control circuitry coupled to said drive means for regulating the speed of scan, said circuitry including means operable during successive cycles of drive power to alternately sense the actual speed of said drive means and regulate said speed to a preselected value.
Claim 2
Dependent Claim
88 words
A high speed data retrieval and display system comprising: a. data storage means for storing a plurality of data items; b. selector means for addressing a preselected data item; c. alternating current drive means for sequentially scanning said data items with said selector means; and d. control circuitry coupled to said drive means for regulating the speed of scan, said circuitry including means operable during successive cycles of drive power to alternately sense the actual speed of said drive means and regulate said speed to a preselected value.
Claim 3
Dependent Claim
22 words
A high speed data retrieval and display system as set forth in claim 1 wherein said storage means comprises a rotary file.
Claim 4
Dependent Claim
33 words
A high speed data retrieval and display system as set forth in claim 2 wherein said data items comprise a plurality of microfische, each having a tab that defines a predetermined binary code.
Claim 5
Dependent Claim
34 words
A high speed data retrieval and display system as set forth in claim 3 wherein said selector means comprises a plurality of bars that may be set to correspond to a predetermined binary code.
Claim 6
Dependent Claim
34 words
A high speed data retrieval and display system as set forth in claim 1 wherein said control circuitry includes transistor isolation means for isolating D.C. logic level signals from said alternating current drive means.
Claim 7
Dependent Claim
32 words
A high speed data retrieval and display system as set forth in claim 1 wherein said control circuitry includes a resettable solid state timing circuit for providing a predetermined and variable delay.
Claim 8
Dependent Claim
49 words
A high speed data retrieval and display system as set forth in claim 1 including positioning means for positioning a selected data item for display, said positioning means including a servo system operable with unfiltered unregulated A.C. drive voltage, said servo system including transistor circuitry for preventing armature breaking.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |