Patent US3633101A successfully refreshed from Google Patents.
US3633101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage transient monitor
Assignee: DATA RESEARCH CORP
•
Filing: 1970-03-04
•
Granted: 1972-01-04
•
Expires: 1990-03-04
Abstract
Abstract A system is provided for measuring and recording high-speed transients occurring on a powerline or other voltage source, using a relatively slow speed recorder. The transient is quantized into discrete amplitude steps and discrete duration increments. The resulting digital values are then stored, and subsequently displayed on the recorder.
Inventors
- 👤 Raymond E Johnson
- 👤 Abraham Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:16
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/32; G01R13/325
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
A transient monitor for measuring high-speed voltage transients occurring at a voltage source and for recording said transients on a slow-speed recorder, comprising input means adapted to be coupled to said voltage source, said input means including reference means for monitoring the magnitudes of voltages supplied by said source to detect occurrence of a transient, amplitude-quantizing means responsive to detection of a transient by said reference means and to the amplitude of said transient for producing first digital signals related to the amplitude of said transient, duration-quantizing means coupled to said input means and responsive to detection of a transient by said reference means and to the duration of said transient for producing second digital signals related to the duration of said transient, memory means for storing said first and second digital signals, means coupled to said memory means for converting said stored first and second digital signals into analog signals related respectively to the amplitude and duration of said transient, and means supplying said analog signals to a slowspeed analog recorder means for displaying information related to the amplitude and duration of said transient.
Claim 2
Dependent Claim
185 words
A transient monitor for measuring high-speed voltage transients occurring at a voltage source and for recording said transients on a slow-speed recorder, comprising input means adapted to be coupled to said voltage source, said input means including reference means for monitoring the magnitudes of voltages supplied by said source to detect occurrence of a transient, amplitude-quantizing means responsive to detection of a transient by said reference means and to the amplitude of said transient for producing first digital signals related to the amplitude of said transient, duration-quantizing means coupled to said input means and responsive to detection of a transient by said reference means and to the duration of said transient for producing second digital signals related to the duration of said transient, memory means for storing said first and second digital signals, means coupled to said memory means for converting said stored first and second digital signals into analog signals related respectively to the amplitude and duration of said transient, and means supplying said analog signals to a slowspeed analog recorder means for displaying information related to the amplitude and duration of said transient.
Claim 3
Dependent Claim
45 words
The monitor of claim 1 wherein said reference means comprises a plurality of voltage detectors, and means establishing differing operating thresholds for differing ones of said detectors whereby selected different ones of said detectors are rendered operative in dependence upon the amplitude of said transient.
Claim 4
Dependent Claim
22 words
The monitor of claim 2 wherein said amplitude-quantizing means includes a plurality of bistable devices coupled respectively to said plurality of detectors.
Claim 5
Dependent Claim
54 words
The monitor of claim 1 wherein said duration-quantizing means includes means for initiating generation of a linear ramp voltage upon commencement of said transient and for terminating generation of said ramp voltage upon cessation of said transient, and means responsive to the terminated magnitude of said ramp voltage for producing said second digital signals.
Claim 6
Dependent Claim
67 words
The monitor of claim 4 wherein said means responsive to the magnitude of said ramp voltage comprises a plurality of voltage detectors, said ramp voltage being supplied to the inputs of all of said plurality of detectors, and means establishing differing operating thresholds for differing ones of said detectors whereby selected different ones of said detectors are rendered operative in dependence upon the duration of said transient.
Claim 7
Dependent Claim
21 words
The monitor of claim 4 wherein said linear ramp voltage is generated by a current source having capacitor means coupled thereto.
Claim 8
Dependent Claim
36 words
The monitor of claim 1 including timer means operable to clear said stored first and second digital signals from said memory means at a predetermined time interval subsequent to detection of the occurrence of said transient.
Claim 9
Dependent Claim
35 words
The monitor of claim 1 wherein alternating current voltages are supplied by said source, said input means comprising means for rectifying the voltages being monitored, and means coupling said rectified voltages to said reference means.
Claim 10
Dependent Claim
27 words
The monitor of claim 1 wherein said recorder means comprises a two-channel recorder, said amplitude and duration information being displayed respectively on separate channels of said recorder.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |