US3761887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interval counting circuit and method
Assignee: Dayton Electronic Products Co
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Filing: 1972-12-13
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Granted: 1973-09-25
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Expires: 1992-12-13
Abstract
Abstract Method and apparatus for transferring data pulses occurring within successive time intervals from one system to another, such as from a magnetic tape to a computer, by applying data pulses to an interval counter during each time interval, reading the contents of the interval counter to a buffer storage device upon receipt of a timing pulse, resetting the interval counter in preparation for receiving data pulses in the next time interval, employing a temporary storage counter to receive any data pulses occurring during the time data is transferred from the interval counter and it is reset, and transferring the contents of the temporary storage register to the interval counter. This method and apparatus prevents inaccurate counting of the total number of pulses received by insuring that data pulses are not missed or counted twice during the transition from one time interval to another.
Inventors
- 👤 D Foster
- 👤 J Hoeffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:41
CPC Classifications
H; H03; H03K; H03K21/00; H03K21/02; H03K21/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
Method for transferring data and timing information from a recording medium to a computer for analysis, said method including the steps of sensing data pulses recorded on the recording medium, sensing timing pulses also recorded on the recording medium, counting the number of data pulses occurring between timing pulses by an interval counter, momentarily inhibiting the receipt of data pulses by the interval counter upon the receipt of a timing pulse, transferring the contents of the interval counter to a computer for analysis, and resetting the interval counter in preparation for receiving the data pulses in the next time interval, sensing the occurrence of and temporarily storing in a temporary storage register any data pulse during the time the interval counter is transferring data and resetting, and transferring the contents of the temporary storage register to the interval counter at the beginning of the next time interval.
Claim 2
Dependent Claim
147 words
Method for transferring data and timing information from a recording medium to a computer for analysis, said method including the steps of sensing data pulses recorded on the recording medium, sensing timing pulses also recorded on the recording medium, counting the number of data pulses occurring between timing pulses by an interval counter, momentarily inhibiting the receipt of data pulses by the interval counter upon the receipt of a timing pulse, transferring the contents of the interval counter to a computer for analysis, and resetting the interval counter in preparation for receiving the data pulses in the next time interval, sensing the occurrence of and temporarily storing in a temporary storage register any data pulse during the time the interval counter is transferring data and resetting, and transferring the contents of the temporary storage register to the interval counter at the beginning of the next time interval.
Claim 3
Dependent Claim
138 words
Apparatus for transferring data and time pulses from a recording medium to a computer for analysis, said recording medium having a timing track and at least one data track, said apparatus including means for sensing data pulses in said data track, means for sensing timing pulses in said timing track, an interval counter, a temporary storage counter, means for transferring data pulses from said data sensing means to said interval counter where said data pulses are counted in the interval between timing pulses, means for transferring the contents of said interval counter to a computer in response to said timing pulses, and means for directing data pulses to said temporary storage counter while said interval counter is transferring its contents to said computer and for subsequently applying any such data pulses to said interval counter following said transfer.
Claim 4
Dependent Claim
138 words
Apparatus for transferring data and time pulses from a recording medium to a computer for analysis, said recording medium having a timing track and at least one data track, said apparatus including means for sensing data pulses in said data track, means for sensing timing pulses in said timing track, an interval counter, a temporary storage counter, means for transferring data pulses from said data sensing means to said interval counter where said data pulses are counted in the interval between timing pulses, means for transferring the contents of said interval counter to a computer in response to said timing pulses, and means for directing data pulses to said temporary storage counter while said interval counter is transferring its contents to said computer and for subsequently applying any such data pulses to said interval counter following said transfer.
Claim 5
Dependent Claim
15 words
The apparatus of claim 2 wherein said temporary storage counter is a one count register.
Claim 6
Dependent Claim
167 words
Apparatus for transferring data and time pulses from a recording medium to a computer for analysis, said recording medium having a timing track and at least one data track, said apparatus including means for sensing data pulses recorded on a data track, means for sensing timing pulses recording on the timing track, an interval counter, means for transferring said data pulses to said interval counter where said data pulses are counted during the time interval between timing pulses, a buffer storage, means for transferring the data in said interval counter to said buffer storage in response to each timing pulse, means for resetting said interval counter upon completion of said transfer data to said buffer storage, a temporary storage counter, means for transferring any data pulse to said temporary storage counter during the transfer of data from said interval counter to said buffer storage, and means for transferring data in said temporary storage counter to said interval counter upon completion of the resetting of said interval counter.
Claim 7
Dependent Claim
167 words
Apparatus for transferring data and time pulses from a recording medium to a computer for analysis, said recording medium having a timing track and at least one data track, said apparatus including means for sensing data pulses recorded on a data track, means for sensing timing pulses recording on the timing track, an interval counter, means for transferring said data pulses to said interval counter where said data pulses are counted during the time interval between timing pulses, a buffer storage, means for transferring the data in said interval counter to said buffer storage in response to each timing pulse, means for resetting said interval counter upon completion of said transfer data to said buffer storage, a temporary storage counter, means for transferring any data pulse to said temporary storage counter during the transfer of data from said interval counter to said buffer storage, and means for transferring data in said temporary storage counter to said interval counter upon completion of the resetting of said interval counter.
References Cited (Backward Citations)
US25527A
Cited
US3019350A
Cited
US2991452A
Cited
US3076183A
Cited
US3114900A
Cited
US3153776A
Cited
US3324241A
Cited
US3327226A
Cited
US3380020A
Cited
US3657704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |