US3631343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time interval averaging circuit
Assignee: HP Inc
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Filing: 1970-08-27
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Granted: 1971-12-28
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Expires: 1990-08-27
Abstract
Abstract A circuit to measure the average time interval that occurs between recurring electrical signals. Independent input channels control the passage of periodic clock pulses through a gate such that only complete clock pulses are passed through the gate. The number of clock pulses that occur during 10N time intervals (where N is an integer) is totalized and displayed.
Inventors
- 👤 Rolf Schmidhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:59
CPC Classifications
G; G04; G04F; G04F10/00; G04F10/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
256 words
Apparatus for measuring the average time interval that occurs between recurring start and stop signals, the apparatus comprising: control means having start and stop inputs and having an output normally at a false level for producing a true level output in response to a start signal being applied at said start input and for returning to said false level output in response to a stop signal being applied at said stop input; a source of periodic clock pulses; clock gating means having a first input connected to said source of periodic clock pulses and a second input connected to said control means output and having an output responsive to a true level at said second input for passing clock pulses through said clock gating means during such time as the true level signal is maintained at said second input; averaging means having an output and having an input A connected to the stop input of said control means and an input B connected to the output of said clock gating means for counting the number of stop signals that appear at input A and for passing through to said output such clock pulses that appear at input B between the first and the 10N stop signal, where N is an integer; means for selecting the number N of time intervals to be averaged; and means to count and display the output of said averaging means, said means including a decade counting assembly having a decimal point indicator responsive to the means for selecting the number N.
Claim 2
Dependent Claim
256 words
Apparatus for measuring the average time interval that occurs between recurring start and stop signals, the apparatus comprising: control means having start and stop inputs and having an output normally at a false level for producing a true level output in response to a start signal being applied at said start input and for returning to said false level output in response to a stop signal being applied at said stop input; a source of periodic clock pulses; clock gating means having a first input connected to said source of periodic clock pulses and a second input connected to said control means output and having an output responsive to a true level at said second input for passing clock pulses through said clock gating means during such time as the true level signal is maintained at said second input; averaging means having an output and having an input A connected to the stop input of said control means and an input B connected to the output of said clock gating means for counting the number of stop signals that appear at input A and for passing through to said output such clock pulses that appear at input B between the first and the 10N stop signal, where N is an integer; means for selecting the number N of time intervals to be averaged; and means to count and display the output of said averaging means, said means including a decade counting assembly having a decimal point indicator responsive to the means for selecting the number N.
Claim 3
Dependent Claim
117 words
Apparatus as in claim 1 wherein said averaging means comprises: main gating means having an input B connected to receive clock pulses from said clock gating means and an input C to control the time interval during which clock pulses will be allowed to pass through Said main gating means and having an output; and counting means having an input A connected to receive signals that represent the occurrence of a time interval and having an output connected to said input C of said main gating means to enable said main gating means in response to a first time interval having occurred and to disable said main gating means in response to 10N time intervals having occurred.
Claim 4
Dependent Claim
125 words
Apparatus as in claim 1 wherein: said control means has a clock input connected to said source of periodic clock pulses for producing said true level output simultaneous with the trailing edge of a clock pulse appearing at said clock input in response to a signal appearing at said start input prior to the appearance of a clock pulse at said clock input and in the absence of a signal appearing at said stop input prior to the appearance of said clock pulse and for producing said false level output simultaneous with the trailing edge of a clock pulse that appears at said clock input after a signal has appeared at said stop input for gating through said clock gating means only complete clock pulses.
References Cited (Backward Citations)
US2877413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |