US3154756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable voltage transformer
Assignee: LR Power Corp
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Filing: 1962-02-08
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Granted: 1964-10-27
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Expires: 1982-02-08
Abstract
No abstract record available.
Inventors
- 👤 Norbert N Bojarski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:56
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A VARIABLE VOLTAGE TRANSFORMER COMPRISING, A TRANSFORMER CORE HAVING A PRIMARY LEG AND TWO SECONDARY LEGS, A PRIMARY WINDING ON SAID PRIMARY LEG, A SECONDARY WINDING ON AT LEAST ONE OF SAID SECONDARY LEGS, AND A MAGNETIC ARMATURE COUPLING SAID PRIMARY LEG WITH AT LEAST ONE OF SAID SECONDARY LEGS BY WORKING CONTACT THEREWITH, SAID ARMATURE BEING DIVIDED LONGITUDINALLY INTO INDEPENDENT LONGITUDINALLY MOVABLE SECTIONS EACH OVERLYING SAID PRIMARY LEG AND PORTIONS OF AT LEAST ONE SECONDARY LEG IN WORKING CONTACT THEREWITH, SAID ARMATURE BEING OF SUCH LENGTH THAT THE COMPOSITE TOTAL AREA OF SAID SECONDARY LEGS CONTACTING EACH ARMATURE SECTION AND COUPLED THEREBY TO SAID PRIMARY LEG IS CONSTANT FOR ALL WORKING POSITIONS OF SAID ARMATURE SECTIONS.
Claim 2
Dependent Claim
117 words
A VARIABLE VOLTAGE TRANSFORMER COMPRISING, A TRANSFORMER CORE HAVING A PRIMARY LEG AND TWO SECONDARY LEGS, A PRIMARY WINDING ON SAID PRIMARY LEG, A SECONDARY WINDING ON AT LEAST ONE OF SAID SECONDARY LEGS, AND A MAGNETIC ARMATURE COUPLING SAID PRIMARY LEG WITH AT LEAST ONE OF SAID SECONDARY LEGS BY WORKING CONTACT THEREWITH, SAID ARMATURE BEING DIVIDED LONGITUDINALLY INTO INDEPENDENT LONGITUDINALLY MOVABLE SECTIONS EACH OVERLYING SAID PRIMARY LEG AND PORTIONS OF AT LEAST ONE SECONDARY LEG IN WORKING CONTACT THEREWITH, SAID ARMATURE BEING OF SUCH LENGTH THAT THE COMPOSITE TOTAL AREA OF SAID SECONDARY LEGS CONTACTING EACH ARMATURE SECTION AND COUPLED THEREBY TO SAID PRIMARY LEG IS CONSTANT FOR ALL WORKING POSITIONS OF SAID ARMATURE SECTIONS.
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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |