US4019122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized power supplies
Assignee: Telcon Magnetic Cores Ltd
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Filing: 1975-08-07
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Granted: 1977-04-19
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Expires: 1995-08-07
Abstract
Abstract A constant-voltage transformer for stabilized power supply includes a primary coil and a secondary coil connected across a tuning capacitor. A magnetically continuous magnetic core links both the primary coil and the secondary coil, and a magnetically discontinuous magnetic core links the secondary coil but not the primary coil. Another discontinuous magnetic core may link the primary coil but not the secondary coil, and a compensating coil may be linked by this core only. Preferred designs have an abrupt cut-off at a load current only a little greater than design value, so that a dangerously high current can never be drawn, even into a total short circuit.
Inventors
- 👤 Kenneth Augustine Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:59
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
A constant-voltage transformer comprising a primary coil, a secondary coil, a tuning capacitor connected across said secondary coil, a magnetically continuous magnetic core linking both said primary coil and said secondary coil, a magnetically discontinuous magnetic core linking said secondary coil but not said primary coil and another discontinuous magnetic core linking said primary coil but not said secondary coil.
Claim 2
Dependent Claim
60 words
A constant-voltage transformer comprising a primary coil, a secondary coil, a tuning capacitor connected across said secondary coil, a magnetically continuous magnetic core linking both said primary coil and said secondary coil, a magnetically discontinuous magnetic core linking said secondary coil but not said primary coil and another discontinuous magnetic core linking said primary coil but not said secondary coil.
Claim 3
Dependent Claim
74 words
A constant-voltage transformer comprising a primary coil, a secondary coil, a tuning capacitor connected across said secondary coil, a magnetically continuous magnetic core linking both said primary coil and said secondary coil, a first magnetically discontinuous magnetic core linking said secondary coil but not said primary coil, and a second discontinuous magnetic core linking said primary coil but not said secondary coil, each said magnetic core being formed of curved laminations of grain-oriented material.
Claim 4
Dependent Claim
74 words
A constant-voltage transformer comprising a primary coil, a secondary coil, a tuning capacitor connected across said secondary coil, a magnetically continuous magnetic core linking both said primary coil and said secondary coil, a first magnetically discontinuous magnetic core linking said secondary coil but not said primary coil, and a second discontinuous magnetic core linking said primary coil but not said secondary coil, each said magnetic core being formed of curved laminations of grain-oriented material.
Claim 5
Dependent Claim
42 words
A constant-voltage transformer as claimed in claim 2 in which said continuous core is a C-type core with its parts closely butted and each of said first and second discontinuous cores is a C-type core with its parts butted on a spacer.
Claim 6
Dependent Claim
20 words
A constant-voltage transformer as claimed in claim 2 in which each said discontinuous core is spaced from said continuous core.
Claim 7
Dependent Claim
25 words
A constant-voltage transformer as claimed in claim 2 in which said primary and secondary coils are located on opposite legs of said continuous magnetic core.
Claim 8
Dependent Claim
22 words
A constant-voltage transformer as claimed in claim 2 in which each said discontinuous magnetic core is located outside said continuous magnetic core.
Claim 9
Dependent Claim
17 words
A constant-voltage transformer as claimed in claim 2 in which all of said magnetic cores are coplanar.
Claim 10
Dependent Claim
85 words
A constant-voltage transformer comprising a primary coil, a secondary coil, a tuning capacitor connected across said secondary coil, a magnetically continuous magnetic core linking both said primary coil and said secondary coil, a first magnetically discontinuous magnetic core linking said secondary coil but not said primary coil, a second discontinuous magnetic core linking said primary coil but not said secondary coil, and a compensating coil linked by said second discontinuous magnetic core only and connected in series with at least part of the secondary coil.
Claim 11
Dependent Claim
85 words
A constant-voltage transformer comprising a primary coil, a secondary coil, a tuning capacitor connected across said secondary coil, a magnetically continuous magnetic core linking both said primary coil and said secondary coil, a first magnetically discontinuous magnetic core linking said secondary coil but not said primary coil, a second discontinuous magnetic core linking said primary coil but not said secondary coil, and a compensating coil linked by said second discontinuous magnetic core only and connected in series with at least part of the secondary coil.
Claim 12
Dependent Claim
23 words
A constant-voltage transformer as claimed in claim 8 in which all of said magnetic cores are formed of curved laminations of grain-oriented material.
Claim 13
Dependent Claim
37 words
A constant-voltage transformer as claimed in claim 9 in which said continuous core is a C-type core with its parts closely butted and each discontinuous core is a C-type core with its parts butted on a spacer.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |