US3230488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer with a carefully adjusted primary inductance
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1962-09-17
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Granted: 1966-01-18
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Expires: 1982-09-17
Abstract
No abstract record available.
Inventors
- 👤 Jacob Walter Emil Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:00
CPC Classifications
H; H01; H01F; H01F19/00; H01F17/00; H01F17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A TRANSFORMER COMPRISING A HOLLOW CYLINDRICAL CORE OF HIGH PERMEABILITY MATERIAL, A PRIMARY WINDING ADAPTED TO RECEIVE AN INPUT SIGNAL, SAID PRIMARY WINDING BEING TOROIDALLY WOUND ABOUT SAID HOLLOW CYLINDRICAL CORE, A SECONDARY WINDING FOR TRANSMITTING AN OUTPUT SIGNAL IN RESPONSE TO AN INPUT SIGNAL RECEIVED BY SAID PRIMARY WINDING, SAID SECONDARY WINDING BEING TOROIDALLY WOUND AROUND SAID HOLLOW CYLINDRICAL CORE, A SHUNT INDUCTANCE WINDING CIRCUMFERENTIALLY WOUND ABOUT SAID HOLLOW CYLINDRICAL CORE, AND MEANS FOR ELECTRICALLY CONNECTING SAID PRIMARY WINDING IN PARALLEL WITH SAID SHUNT INDUCTANCE WINDING, WHEREBY THE EFFECTIVE VALUE OF THE INDUCTANCE OF SAID PRIMARY WINDING IS REDUCED IN ACCORDANCE WITH THE VALUE OF THE INDUCTANCE OF SAID SHUNT INDUCTANCE WINDING.
Claim 2
Dependent Claim
113 words
A TRANSFORMER COMPRISING A HOLLOW CYLINDRICAL CORE OF HIGH PERMEABILITY MATERIAL, A PRIMARY WINDING ADAPTED TO RECEIVE AN INPUT SIGNAL, SAID PRIMARY WINDING BEING TOROIDALLY WOUND ABOUT SAID HOLLOW CYLINDRICAL CORE, A SECONDARY WINDING FOR TRANSMITTING AN OUTPUT SIGNAL IN RESPONSE TO AN INPUT SIGNAL RECEIVED BY SAID PRIMARY WINDING, SAID SECONDARY WINDING BEING TOROIDALLY WOUND AROUND SAID HOLLOW CYLINDRICAL CORE, A SHUNT INDUCTANCE WINDING CIRCUMFERENTIALLY WOUND ABOUT SAID HOLLOW CYLINDRICAL CORE, AND MEANS FOR ELECTRICALLY CONNECTING SAID PRIMARY WINDING IN PARALLEL WITH SAID SHUNT INDUCTANCE WINDING, WHEREBY THE EFFECTIVE VALUE OF THE INDUCTANCE OF SAID PRIMARY WINDING IS REDUCED IN ACCORDANCE WITH THE VALUE OF THE INDUCTANCE OF SAID SHUNT INDUCTANCE WINDING.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |