Patent US3614535A successfully refreshed from Google Patents.
US3614535A
Expired / Lapsed
US
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Voltage transformer
Assignee: Holzer Patent AG
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Filing: 1970-02-25
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Granted: 1971-10-19
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Expires: 1990-02-25
Abstract
Abstract A device and electric circuit to supply a voltage to a consumer with means to switch over from a network to battery-powered operation.
Inventors
- 👤 Konstantin Apel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:31
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/66; H02M7/68; H02M7/72; H02M7/79; H02M7/797; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/062; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y04; Y04S; Y04S20/00; Y04S20/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
A voltage transformer circuit for providing an AC output to a load, comprising; an AC power source, a voltage transformer having split primary and secondary windings, means for connecting one of said split primary windings to said AC source only when said AC source is energized, the other of said split primary windings is connected to said load, a DC source, an oscillator for interconnecting said secondary windings to one pole of said DC source, said means for connecting also including means for interconnecting the other pole of said DC source to said oscillator, and means for charging said battery connected to said secondary windings, whereby said AC output is obtained from said AC source through said transformer and said DC source is charged from said split secondary windings and said AC output is alternatively obtained from said battery, oscillator and said transformer when said AC is deenergized.
Claim 2
Dependent Claim
148 words
A voltage transformer circuit for providing an AC output to a load, comprising; an AC power source, a voltage transformer having split primary and secondary windings, means for connecting one of said split primary windings to said AC source only when said AC source is energized, the other of said split primary windings is connected to said load, a DC source, an oscillator for interconnecting said secondary windings to one pole of said DC source, said means for connecting also including means for interconnecting the other pole of said DC source to said oscillator, and means for charging said battery connected to said secondary windings, whereby said AC output is obtained from said AC source through said transformer and said DC source is charged from said split secondary windings and said AC output is alternatively obtained from said battery, oscillator and said transformer when said AC is deenergized.
Claim 3
Dependent Claim
37 words
A voltage transformer circuit as in claim 1 wherein said means for charging includes means for disconnecting said battery from said oscillator and said secondary windings if said one pole and said other pole connections are interchanged.
Claim 4
Dependent Claim
54 words
A voltage transformer circuit as in claim 2 wherein said means for connecting is a relay having an operating coil connected to said AC source and at least two operating contacts for respectively connecting said one split winding to said AC source and connecting said other pole of said DC source to said oscillator.
Claim 5
Dependent Claim
27 words
A voltage transformer circuit as in claim 3 further comprising temperature-sensitive switch means for connecting and disconnecting said load to said other of said split primary windings.
Claim 6
Dependent Claim
28 words
A voltage transformer circuit as in claim 4 wherein said means for connecting further includes an additional temperature-sensitive switch means interposed between said DC source and said oscillator.
Claim 7
Dependent Claim
59 words
A voltage transformer circuit as in claim 2 wherein said means for disconnecting said DC source includes a fuse connected between said one pole and said secondary winding and a diode connected between said other pole and said secondary winding, said diode is forward biased to conduct with said pole and said other pole interchanged to activate said fuse.
Claim 8
Dependent Claim
16 words
A voltage transformer circuit as in claim 6 wherein said diode conducts to charge said battery
Claim 9
Dependent Claim
52 words
A voltage transformer circuit as in claim 1 wherein said oscillator includes at least two active components interconnected by said secondary windings and a respective capacitor connected to each of said at least two active components to suppress voltage peaks, said capacitors having different capacitance values to initiate operation of said oscillator.
References Cited (Backward Citations)
US3356922A
Cited
US3419730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |