Patent US4658820A successfully refreshed from Google Patents.
US3678468A
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US
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Digital data storage system
Assignee: United States Department of the Navy
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Filing: 1970-12-15
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Granted: 1972-07-18
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Expires: 1990-12-15
Abstract
Abstract A digital data storage system for an in-situ measuring device having a simplified logic to perform all of the functions required to record fourteen bit data words on six tape channels, with parallel-in and parallel-out processing between the measuring device sensors and the tape recorder. The storage system accepts and records sampled data and event data from the measuring device and records the time of occurrence of this data. An internal clock and associated logic determine the initiation and termination of sampling intervals, and other logic controls the transfer of data from temporary storage to tape.
Inventors
- 👤 Donald E Jefferson
- 👤 Ronald G Vermillion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:01
CPC Classifications
G; G07; G07C; G07C5/00; G07C5/08; G07C5/0841; G07C5/0875; G07C5/0883; G01; G01D; G01D9/00; G01D9/005
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
199 words
A data storage system for recording digital input data from a measuring device, said system comprising: first input means for counting specified events in said digital input data for a preset time interval and for producing digital event rate data therefrom; second input means for sampling a portion of said digital input data in response to a sampling transfer signal and for producing digital sampled data therefrom; timing means for generating digital timing data indicative of the time of occurrence of said digital event data and said digital sampled data; control logic means having five outputs, said outputs respectively resetting said first input means to zero count at the end of said preset time interval, generating said sampling transfer signal, and producing a first sequence of digital data containing said digital timing data, said digital event data, and said digital sampled data; start-stop control means for initiating and terminating the operation of said control logic means; first storage means operable in response to said control logic means for temporarily storing said first sequence of digital data and for generating therefrom a second sequence of digital data; and second storage means for permanently recording said second sequence of digital data.
Claim 2
Dependent Claim
199 words
A data storage system for recording digital input data from a measuring device, said system comprising: first input means for counting specified events in said digital input data for a preset time interval and for producing digital event rate data therefrom; second input means for sampling a portion of said digital input data in response to a sampling transfer signal and for producing digital sampled data therefrom; timing means for generating digital timing data indicative of the time of occurrence of said digital event data and said digital sampled data; control logic means having five outputs, said outputs respectively resetting said first input means to zero count at the end of said preset time interval, generating said sampling transfer signal, and producing a first sequence of digital data containing said digital timing data, said digital event data, and said digital sampled data; start-stop control means for initiating and terminating the operation of said control logic means; first storage means operable in response to said control logic means for temporarily storing said first sequence of digital data and for generating therefrom a second sequence of digital data; and second storage means for permanently recording said second sequence of digital data.
Claim 3
Dependent Claim
74 words
The data storage system of claim 1, wherein said first input means comprises: pulse generating means connectable to said measuring device for producing an output pulse upon the occurrence of said specified event; and a binary step-down counter for counting output pulses from said pulse generating means during said preset time interval, at the conclusion of which interval said binary step-down counter is reset to zero count in response to said control logic means.
Claim 4
Dependent Claim
47 words
The data storage system of claim 1, wherein said second input means comprises: gating means connectable to said measuring device and operable in response to said sampling signal from said control logic means for passing said portion of said digital input data to said first storage means.
Claim 5
Dependent Claim
49 words
The data storage system of claim 3, wherein said gating means comprises a plurality of AND gates, one input of each of said AND gates receiving a bit of said portion of said digital input data, and another input of each of said AND gates receiving said sampling signal.
Claim 6
Dependent Claim
95 words
The data storage system of claim 1, wherein said timing means comprises: time base oscillator means for generating a fixed frequency timing signal; a first binary step-down counter for frequency dividing said fixed frequency timing signal; a binary divide-by-12 counter having a first plurality of stages for dividing the output of said first binary step-down counter by 12; a second binary step-down counter connected to the output of said divide-by-12 counter and having a second plurality of stages, wherein said digital timing data comprises the outputs of said first and said second plurality of stages.
Claim 7
Dependent Claim
17 words
The data storage system of claim 5, wherein said time base oscillator means comprises a crystal oscillator.
Claim 8
Dependent Claim
161 words
The data storage system of claim 1 wherein said control logic means comprises: logic time base oscillator means for generating a logic timing signal; a binary step-down counter having a plurality of stages, each stage having a set output and a reset output; first gating means comprising a plurality of logic elements operable in response to said logic timing signal and to said set and said reset outputs of said plurality of step-down counter stages for generating a first control signal for effecting a resetting of said first input means to zero count, for generating said sampling transfer signal, for generating a digital event data transfer signal, and for generating a digital timing data transfer signal; and second gating means receiving said digital timing data said digital event data, and said digital sampled data, and operabLe in response to said digital event data transfer signal and to said digital timing data transfer signal, for generating said first sequence of digital data.
Claim 9
Dependent Claim
105 words
The data storage system of claim 1, wherein said first storage means comprises: a plurality of flip-flops coupled to said control logic means for temporarily storing said first sequence of digital data; third gating means for generating a plurality of gating signals; fourth gating means having a plurality of gates for passing the outputs of selected ones of said plurality of flip-flops in response to said plurality of gating signals, thereby generating said second sequence of digital data; and fifth gating means coupled to said third and fourth gating means for effecting transmission of said second sequence of digital data to said second storage means.
Claim 10
Dependent Claim
89 words
The data storage system of claim 1, wherein said second storage means comprises: sixth gating means operable in response to said control logic means for generating a write transfer signal; and means coupled to said first storage means and operable in response to said write transfer signal for writing said second sequence of digital data on magnetic tape; and means responsive to said start-stop control means and said control logic means and connectable to a tape recorder drive motor for operating said motor and thereby advancing said magnetic tape.
Claim 11
Dependent Claim
211 words
The data storage system of claim 9, wherein said writing means comprises a plurality of writing channels, each channel comprising: a first and a second NOR gate, said NOR gates capable of acting as either current sinks or current sources, said first NOR gate receiving as input data the binary complement of the input data to said second NOR gate, and said first and said second NOR gates operable in response to said write transfer signal for passing said received input data; a series circuit comprising a first and a second current limiting resistor, and a write coil, said first current limiting resistor connected between the output of said first NOR gate and one end of said write coil, and said second current limiting resistor connected between the output of said second NOR gate and the other end of said write coil; a first diode having its cathode connected to one end of said write coil and its anode connected to a reference potential; and a second diode having its cathode connected to said other end of said write coil and its anode connected to said reference potential, whereby the digital information that is permanently recorded on magnetic tape is dependent upon the direction of current flow through said write coil.
Claim 12
Dependent Claim
165 words
The data storage system of claim 9, wherein said means for operating said motor comprises: seventh gating means for generating a drive pulse in response to output signals from said start-stop control means and said control logic means; a flip-flop and pulse generating means coupled in parallel to the output of said seventh gating means; power gating means coupled to said pulse generating means for passing current from a source of energy to said motor operating means; eight gating means operable in responsive to output signals from the set output of said flip-flop and said pulse generating means for passing current from said source of energy through a field winding of said tape recorder drive motor in a first direction; and ninth gating means operable in response to the reset output of said flip-flop and said pulse generating means for passing current from said source of energy through said field winding of said tape recorder drive motor in a direction opposite to said first direction.
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |