Patent US3628091A successfully refreshed from Google Patents.
US3628091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonance suppressor for electrical system including capacitors
Assignee: R H BOULIGNY Inc
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Filing: 1970-05-13
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Granted: 1971-12-14
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Expires: 1990-05-13
Abstract
Abstract Resonance effects otherwise possibly occurring in a main alternating current electrical circuit having a bank of capacitors connected therein are suppressed by a circuit arrangement which inserts a resonance suppressing resistance into parallel, shunting conductive relation with the bank of capacitors in response to sensing of the presence of a predetermined voltage across the bank of capacitors.
Inventors
- 👤 Herman B Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:49
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/16; H02H9/00; H02H9/005; H02H9/007; H02J; H02J3/00; H02J3/12; H02J3/16; Y; Y02; Y02E; Y02E40/00; Y02E40/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
In a main alternating current electrical circuit having a bank of capacitors connected therein, the combination of means for suppressing resonance otherwise possibly occurring in said circuit and comprising: resonance-suppressing means operatively connected with said bank of capacitors for insertion into parallel, shunting conductive relation therewith and thereby for suppressing resonance in said circuit, voltage-responsive means connected in parallel with said bank of capacitors for sensing the presence of a predetermined voltage thereacross indicative of a ferro or subsynchronous resonance condition existing in said circuit and operatively connected to said resonance-suppressing means for inserting the same into parallel conductive relation with said bank of capacitors in response to sensing of said predetermined voltage thereacross, and timing means operatively connected to said resonance-suppressing means for removing said resonance-suppressing means from parallel conductive relation with said bank of capacitors upon continuance of said predetermined voltage thereacross for a predetermined time period.
Claim 2
Dependent Claim
149 words
In a main alternating current electrical circuit having a bank of capacitors connected therein, the combination of means for suppressing resonance otherwise possibly occurring in said circuit and comprising: resonance-suppressing means operatively connected with said bank of capacitors for insertion into parallel, shunting conductive relation therewith and thereby for suppressing resonance in said circuit, voltage-responsive means connected in parallel with said bank of capacitors for sensing the presence of a predetermined voltage thereacross indicative of a ferro or subsynchronous resonance condition existing in said circuit and operatively connected to said resonance-suppressing means for inserting the same into parallel conductive relation with said bank of capacitors in response to sensing of said predetermined voltage thereacross, and timing means operatively connected to said resonance-suppressing means for removing said resonance-suppressing means from parallel conductive relation with said bank of capacitors upon continuance of said predetermined voltage thereacross for a predetermined time period.
Claim 3
Dependent Claim
18 words
An electrical circuit according to claim 1 wherein said voltage-responsive means includes a suppressor-inserting switch and switch-actuating means.
Claim 4
Dependent Claim
41 words
An electrical circuit according to claim 2 wherein said suppressor-inserting switch comprises a movable armature and said switch-actuating means comprises a magnetic field generating winding coupled to said armature for moving said armature in response to voltage applied to said winding.
Claim 5
Dependent Claim
57 words
An electrical circuit according to claim 2 wherein said voltage-responsive means further comprises a potential transformer having a primary winding connected in parallel with said bank of capacitors and a secondary winding connected to said contact-actuating means, said potential transformer applying to said contact-actuating means a voltage correlated to the voltage appearing across said bank of capacitors.
Claim 6
Dependent Claim
38 words
An electrical circuit according to claim 1 wherein said resonance-suppressing means comprises a resistor normally maintained out of current-conducting relation with said main circuit and operative upon insertion thereinto for modifying the resonant frequency of said main circuit.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |