US3349320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tap changing transformer having means to change tap range
Assignee: McGraw Edison Co
•
Filing: 1965-04-01
•
Granted: 1967-10-24
•
Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Gene R Mathes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:49
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/02; H01F29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
AN ELECTRICAL TRANSFORMER HAVING A PAIR OF INDUCTIVELY RELATED WINDINGS, ONE OF SAID WINDINGS HAVING FOUR SEPARATE WINDING SECTIONS THE FIRST AND SECOND OF WHICH ARE PROVIDED WITH TAPS, A TAP CHANGER HAVING A PLURALITY OF STATIONARY CONTACTS WITH ODD-NUMBERED STATIONARY CONTACTS CONNECTED TO THE TAPS OF SAID FIRST WINDING SECTION AND EVEN-NUMBERED STATIONARY CONTACTS CONNECTED TO THE TAPS OF SAID SECOND WINDING SECTION AND A MOVABLE CONTACT ADAPTED TO SEQUENTIALLY COMMON ADJACENT PAIRS OF SAID STATIONARY CONTACTS, AND SWITCH MEANS FOR SELECTIVELY CONNECTING SAID THIRD AND FOURTH WINDING SECTIONS RESPECTIVELY TO SAID TAPS ON SAID FIRST AND SECOND WINDING SECTIONS, WHEREBY THE VOLTAGE RANGE OVER WHICH SAID TAP CHANGER OPERATES MAY BY VARIED.
Claim 2
Dependent Claim
114 words
AN ELECTRICAL TRANSFORMER HAVING A PAIR OF INDUCTIVELY RELATED WINDINGS, ONE OF SAID WINDINGS HAVING FOUR SEPARATE WINDING SECTIONS THE FIRST AND SECOND OF WHICH ARE PROVIDED WITH TAPS, A TAP CHANGER HAVING A PLURALITY OF STATIONARY CONTACTS WITH ODD-NUMBERED STATIONARY CONTACTS CONNECTED TO THE TAPS OF SAID FIRST WINDING SECTION AND EVEN-NUMBERED STATIONARY CONTACTS CONNECTED TO THE TAPS OF SAID SECOND WINDING SECTION AND A MOVABLE CONTACT ADAPTED TO SEQUENTIALLY COMMON ADJACENT PAIRS OF SAID STATIONARY CONTACTS, AND SWITCH MEANS FOR SELECTIVELY CONNECTING SAID THIRD AND FOURTH WINDING SECTIONS RESPECTIVELY TO SAID TAPS ON SAID FIRST AND SECOND WINDING SECTIONS, WHEREBY THE VOLTAGE RANGE OVER WHICH SAID TAP CHANGER OPERATES MAY BY VARIED.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |