Patent US4881014A successfully refreshed from Google Patents.
US4881014A
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US
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Stabilized electric power apparatus for generating direct and alternating current simultaneously in one transformer
Assignee: Toshiba Corp
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Filing: 1988-12-20
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Granted: 1989-11-14
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Expires: 2008-12-20
Abstract
Abstract The present invention comprises a switching circuit which converts direct current electric power into a pulse; an insulative transformer which includes a primary coil for loading a generated pulse, coils for direct and alternating current outputs which are provided on the secondary coil side of the insulative transformer; an impendance circuit for controlling current which is connected with the coil for alternating the output; a control circuit which controls the switching circuit so that the output voltage of the coil for the direct current output is kept constant; and a fluorescent lamp connected with the coil for alternating the current output. The circuit can obtain the alternating current without secondary switching.
Inventors
- 👤 Sadao Okochi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:52
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/42; H05; H05B; H05B41/00; H05B41/14; H05B41/26; H05B41/28; H05B41/282; H05B41/2821; H05B41/2824; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33538; H02M3/33546; H02M3/33561; H02M3/337; H02M3/3376; H02M3/3378; Y; Y10; Y10S; Y10S315/00; Y10S315/01; Y10S315/07
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A stabilized electric power apparatus, comprising: switching means for converting direct current into an alternating current pulse by switching; a primary coil for inputting the generated pulse; a plurality of secondary coils, being connected electrically to said primary coil and corresponding to both direct and alternating current outputs; impedance means including choke coil means connected in series with one of said plurality of secondary coils corresponding to the alternating current output for stabilizing the current output thereof and for operating as ballast; control means responsive to the output voltage of one of said plurality of said secondary coils corresponding to the direct current output and for controlling said switching means so that the output of said direct current output and said alternating current output are constant; and negative resistance means connected with said secondary coil for alternating current output.
Claim 2
Dependent Claim
139 words
A stabilized electric power apparatus, comprising: switching means for converting direct current into an alternating current pulse by switching; a primary coil for inputting the generated pulse; a plurality of secondary coils, being connected electrically to said primary coil and corresponding to both direct and alternating current outputs; impedance means including choke coil means connected in series with one of said plurality of secondary coils corresponding to the alternating current output for stabilizing the current output thereof and for operating as ballast; control means responsive to the output voltage of one of said plurality of said secondary coils corresponding to the direct current output and for controlling said switching means so that the output of said direct current output and said alternating current output are constant; and negative resistance means connected with said secondary coil for alternating current output.
Claim 3
Dependent Claim
31 words
The stabilized electric power apparatus according to claim 1, wherein said impedance means includes a choke coil and a capacitor connected in series with said secondary coil for alternating current output.
Claim 4
Dependent Claim
43 words
The stabilized electric power apparatus according to claim 1, wherein said impedance means includes a primary and a secondary choke coil connected in series with said coil for alternating output, and a capacitor connected in parallel with said coil for alternating current output.
Claim 5
Dependent Claim
18 words
The stabilized electric power apparatus according to claim 1, wherein said negative resistance means includes a fluorescent lamp.
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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) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |