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Patent US3835430A successfully refreshed from Google Patents.
US3835430A
Expired / Lapsed
US
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Tubular core electric transformer
Assignee: Novex Talalmanyfejleszto Es Ertekesito Kulkereskedelmi Rt
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Filing: 1972-04-05
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Granted: 1974-09-10
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Expires: 1992-04-05
Abstract
Abstract An electric transformer has a tubular iron core and its primary is located within the tube which can serve for secondary. In such case, the tubular iron core is short-circuited by a conductor connected to the tube extremities. The transformer may also have a secondary separate from the tubular iron core in which case the secondary has, preferably, likewise the form of a tube located within the tubular iron core and surrounding the primary. Both the primary and the secondary may consist of several turns. Such transformers are distinguished by exceptionally high values of power factor and efficiency, and are particularly suitable for heating, heat storing and energy shock absorbing purposes.
Inventors
- 👤 L Kocsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:43
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/10; H01F27/00; H01F27/34; H01F27/36; H01F27/366
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
In an electric heating transformer, a tubular solid iron core and a transformer primary within said tubular core and insulation within said tubular core surrounding said transformer primary; the improvement in which said tubular core is in the form of a closed loop comprised by a plurality of iron core elements electrically conductively bonded together by welding or brazing in electrically short-circuited relation.
Claim 2
Dependent Claim
63 words
In an electric heating transformer, a tubular solid iron core and a transformer primary within said tubular core and insulation within said tubular core surrounding said transformer primary; the improvement in which said tubular core is in the form of a closed loop comprised by a plurality of iron core elements electrically conductively bonded together by welding or brazing in electrically short-circuited relation.
Claim 3
Dependent Claim
44 words
A structure as claimed in claim 1, said tubular iron core comprising a pair of tubular iron core elements disposed in a common plane and interconnected at their ends by tubular iron yokes which are divided in said plane into pairs of crescent-shaped parts.
Claim 4
Dependent Claim
42 words
A structure as claimed in claim 2, which is elongated in the direction of said tubular iron core elements, said transformer primary and insulation being continuous through one of said yokes and emerging from said core through the other of said yokes.
Claim 5
Dependent Claim
11 words
A structure as claimed in claim 3, said yokes being semi-circular.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |