Patent US4969289A successfully refreshed from Google Patents.
Patent US4639707A successfully refreshed from Google Patents.
US4639707A
Expired / Lapsed
US
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Transformer with toroidal magnetic core
Assignee: Honeywell International Inc
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Filing: 1986-03-19
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Granted: 1987-01-27
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Expires: 2006-03-19
Abstract
Abstract A transformer with a toroidal magnetic core. The toroidal magnetic core is housed in an insulating case. The insulating case has a top and bottom annular winding frames. These frames provide radial winding conductor grooves. The top annular winding frame provides a plurality of grooves for guiding an inter-connecting conductor therein each of which is formed between two adjacent winding conductor grooves. The inter-connecting conductor is guided through said guiding groove to connect between the adjacent two unit coils.
Inventors
- 👤 Kazuhiro Tanaka
- 👤 Yasuo Yamamoto
- 👤 Katsumi Hanaoka
- 👤 Masatake Hirai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:09
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/30; H01F27/306; H01F30/00; H01F30/06; H01F30/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
180 words
A transformer with a toroidal magnetic core which comprises: a toroidal magnetic core; an annular winding frame for covering the top and bottom surfaces of the toroidal magnetic core in its axial direction thereof on which a plurality of grooves for inserting a winding conductor are formed radially; a winding of the transformer being consisted of a plurality of unit coils being connected between the adjacent two of them electrically, where the unit coils are wound around the core, fixed in the groove of the annular winding frame; conductor guiding grooves each being laid between two grooves for inserting a winding conductor adjacent to each other, said conductor guiding groove having a shallow groove portion near the end on the entrance side of the conductor guiding groove and a deep groove portion near the end on the exit side of the conductor guiding groove, the bottom of said deep groove portion is formed to have a plane same to that of the bottom of the winding conductor groove to which the exit end of the conductor guiding groove is connected.
Claim 2
Dependent Claim
180 words
A transformer with a toroidal magnetic core which comprises: a toroidal magnetic core; an annular winding frame for covering the top and bottom surfaces of the toroidal magnetic core in its axial direction thereof on which a plurality of grooves for inserting a winding conductor are formed radially; a winding of the transformer being consisted of a plurality of unit coils being connected between the adjacent two of them electrically, where the unit coils are wound around the core, fixed in the groove of the annular winding frame; conductor guiding grooves each being laid between two grooves for inserting a winding conductor adjacent to each other, said conductor guiding groove having a shallow groove portion near the end on the entrance side of the conductor guiding groove and a deep groove portion near the end on the exit side of the conductor guiding groove, the bottom of said deep groove portion is formed to have a plane same to that of the bottom of the winding conductor groove to which the exit end of the conductor guiding groove is connected.
Claim 3
Dependent Claim
59 words
A transformer with a toroidal magnetic core according to claim 1, wherein the bottom of the shallow portion is formed to have a height almost same to that of the outmost surface of the unit coil wound around the core being fixed in the winding conductor groove which is connected to the entrance end of the conductor guiding groove.
Claim 4
Dependent Claim
29 words
A transformer with a toroidal magnetic core according to claim 1, wherein said winding is a high-voltage winding being consisted with a plurality of unit coils connected in series.
Claim 5
Dependent Claim
26 words
A transformer with a toroidal magnetic core according to claim 1, wherein said winding is a low-voltage winding being consisted of unit coils connected in series.
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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |