Patent US3611232A successfully refreshed from Google Patents.
US3611232A
Expired / Lapsed
US
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Cascade connected transformer
Assignee: Nissin Electric Co Ltd
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Filing: 1970-04-24
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Granted: 1971-10-05
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Expires: 1990-04-24
Abstract
Abstract A cascade connection transformer having main primary and secondary windings closely coupled to each other, an auxiliary primary winding having the same number of turns as the main primary winding and connected in parallel therewith, and a tertiary winding closely coupled with the auxiliary primary winding.
Inventors
- 👤 Teiichi Sakamoto
- 👤 Jun Nishidai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:19
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
A plurality of cascade connected transformers, each of said transformers comprising; a main primary winding, a secondary winding inductively coupled to said main primary winding, an auxiliary primary winding having the same number of turns as said main primary winding, means connecting said auxiliary primary winding in parallel with said main primary winding, a tertiary winding inductively coupled to said auxiliary primary winding, an iron core carrying said main and auxiliary primary windings, said secondary winding and said tertiary winding, an insulating layer positioned between said main and auxiliary windings and said secondary and tertiary windings for isolating said secondary and tertiary windings from said main and auxiliary primary windings and said iron core, and means electrically connecting the tertiary winding of each of said plurality of transformers across the main and auxiliary primary windings of another one of said plurality of transformers.
Claim 2
Dependent Claim
143 words
A plurality of cascade connected transformers, each of said transformers comprising; a main primary winding, a secondary winding inductively coupled to said main primary winding, an auxiliary primary winding having the same number of turns as said main primary winding, means connecting said auxiliary primary winding in parallel with said main primary winding, a tertiary winding inductively coupled to said auxiliary primary winding, an iron core carrying said main and auxiliary primary windings, said secondary winding and said tertiary winding, an insulating layer positioned between said main and auxiliary windings and said secondary and tertiary windings for isolating said secondary and tertiary windings from said main and auxiliary primary windings and said iron core, and means electrically connecting the tertiary winding of each of said plurality of transformers across the main and auxiliary primary windings of another one of said plurality of transformers.
Claim 3
Dependent Claim
45 words
A plurality of cascade connected transformers as defined in claim 1 further including, means serially connecting each of said secondary windings to its corresponding tertiary winding, a secondary winding and its corresponding tertiary winding being wound on the same one of said plurality of transformers.
Claim 4
Dependent Claim
88 words
A plurality of cascade connected transformers as defined in claim 2 wherein each of said plurality of cascade connected transformers further comprises, an iron core having a main path and a return path and wherein said main primary winding and said secondary winding of each of said plurality of transformers are wound around said main path of their corresponding iron core and said auxiliary primary winding and said tertiary winding of each of said plurality of transformers are wound about said return path of their corresponding iron core.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |