Patent US3838445A successfully refreshed from Google Patents.
US3838445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Event recording system
Assignee: Edmac Associates Inc
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Filing: 1973-05-29
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Granted: 1974-09-24
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Expires: 1993-05-29
Abstract
Abstract Apparatus is disclosed wherein analog signals produced by a plurality of sensors are multiplexed and applied to an analog to digital converter wherein each analog signal is converted to a digital word signal. The apparatus further includes circuitry which is responsive to the digital word signals when any one of such signals represents the amplitude of an analog signal above a selected value for causing a tape transport mechanism to be energized.
Inventors
- 👤 F Cupp
- 👤 Camp G Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:17
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1803
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
240 words
In a data recording system, the combination comprising: a. transport means effective when energized for moving a medium such as a disc or tape past a recording means, such as a recording head; b. analog means for coupling first analog signals over a plurality of channels; c. multiplexer means responsive to the first analog signals and to a specific control means for sequentially producing a second analog signal representative of one of the first signals; d. an analog to digital converter responsive to the second analog signal for producing a digital word signal having a plurality of bits which is representative of the amplitude of the second analog signal; e. detector means responsive to said digital word signal and effective in a first condition when said digital word signal indicates the second analog signal is below a pre-determined threshold level and effective in a second condition when said digital word signal indicates the analog signal is above the threshold level; f. means responsive to the detector means in said first condition for producing address signals at a first rate; and responsive to said detector means in said second condition for producing address signals at a second rate and energizing the transport means; g. encoding means coupled to said analog to digital converter responsive to the digital word for recording a digital representation on a first track of the medium representative of the digital word after said transport means is energized.
Claim 2
Dependent Claim
240 words
In a data recording system, the combination comprising: a. transport means effective when energized for moving a medium such as a disc or tape past a recording means, such as a recording head; b. analog means for coupling first analog signals over a plurality of channels; c. multiplexer means responsive to the first analog signals and to a specific control means for sequentially producing a second analog signal representative of one of the first signals; d. an analog to digital converter responsive to the second analog signal for producing a digital word signal having a plurality of bits which is representative of the amplitude of the second analog signal; e. detector means responsive to said digital word signal and effective in a first condition when said digital word signal indicates the second analog signal is below a pre-determined threshold level and effective in a second condition when said digital word signal indicates the analog signal is above the threshold level; f. means responsive to the detector means in said first condition for producing address signals at a first rate; and responsive to said detector means in said second condition for producing address signals at a second rate and energizing the transport means; g. encoding means coupled to said analog to digital converter responsive to the digital word for recording a digital representation on a first track of the medium representative of the digital word after said transport means is energized.
Claim 3
Dependent Claim
29 words
The invention as set forth in claim 1 wherein the system includes means for periodically inserting a frame character word to the encoding means for recording on the medium.
Claim 4
Dependent Claim
50 words
The invention as set forth in claim 2 above including a shift register coupled between said encoding means and said analog to digital converter for serially delivering the bits of a data word to the encoding means thereby delaying the process of recording the data bits by said recording means.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |