US3609326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counting apparatus and method using separate counters for reference and unknown signal
Assignee: HP Inc
•
Filing: 1969-01-22
•
Granted: 1971-09-28
•
Expires: 1989-01-22
Abstract
Abstract Improved apparatus and method for determining the rate of recurrence of input events involves counting recurring input events and recurring reference events for a period of time that is determined by the desired length of measurement period, and the timing of the input events. The desired output indication of recurrence rate of input events is provided by arithmetically dividing the arbitrary number of input events occurring within the measurement period by the arbitrary number of reference events occurring within the same measurement period.
Inventors
- 👤 Alan S Bagley
- 👤 France Rode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:54
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/02; G01R23/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
191 words
Digital signal apparatus comprising: first and second signal-counting means, each for accumulating a count of the number of signals applied thereto; a source of reference signal and an input terminal for receiving applied signals; first and second gating means, each being enabled to pass signal therethrough in response to control signal applied thereto; said first gating means being connected to apply reference signal from said source to the first signal-counting means and said second gating means being connected to apply signal appearing at said input terminal to the second signal-counting means; gate control means coupled to each of said gates for applying control signal thereto for selected time intervals of substantially equal duration; divider means responsive to the accumulated counts in each of the first and second signal-counting means for producing an output proportional to the quotient of the accumulated count in one of the first and second signal-counting means divided by the accumulated count in the other of the first and second signal-counting means; and display means responsive to said output for producing an output indication of said quotient of the one accumulated count divided by the other accumulated count.
Claim 2
Dependent Claim
191 words
Digital signal apparatus comprising: first and second signal-counting means, each for accumulating a count of the number of signals applied thereto; a source of reference signal and an input terminal for receiving applied signals; first and second gating means, each being enabled to pass signal therethrough in response to control signal applied thereto; said first gating means being connected to apply reference signal from said source to the first signal-counting means and said second gating means being connected to apply signal appearing at said input terminal to the second signal-counting means; gate control means coupled to each of said gates for applying control signal thereto for selected time intervals of substantially equal duration; divider means responsive to the accumulated counts in each of the first and second signal-counting means for producing an output proportional to the quotient of the accumulated count in one of the first and second signal-counting means divided by the accumulated count in the other of the first and second signal-counting means; and display means responsive to said output for producing an output indication of said quotient of the one accumulated count divided by the other accumulated count.
Claim 3
Dependent Claim
41 words
Digital signal apparatus as in claim 1 wherein said gate control means includes means coupled to said input terminal for applying control signals simultaneously to said first and second gating means substantially in synchronism with signal appearing at said input terminal.
Claim 4
Dependent Claim
119 words
Digital signal apparatus as in claim 2 wherein: said gate control means includes a trigger circuit which produces said control signal in response to a triggering signal applied thereto following arming of the trigger circuit in response to an arming signal applied thereto; means coupled to said gate control means for applying thereto an arming signal derived from said reference signal; and means coupled to said gate control means for applying a triggering signal thereto derived from signal appearing at said input terminal for initiating and terminating said control signal in synchronism with signals at said input terminal that appear, respectively, after said arming signal is applied to said gate control means and after said arming signal is removed.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |