Patent US3569817A successfully refreshed from Google Patents.
US3569817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current transmitter
Assignee: Dornier System GmbH
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Filing: 1969-09-24
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Granted: 1971-03-09
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Expires: 1989-09-24
Abstract
Abstract The transmitter circuit is provided with a transformer with a primary winding to which direct current is applied and a secondary coil which has two secondary windings. One secondary winding connects over a resistance to a transistor bridging each of the supply lines of the consumer while the other secondary winding is in a circuit including a pair of thyristors connected in antiparallel and a resistance which connects to the base of the transistor.
Inventors
- 👤 Andreas Boehringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:36
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/135
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
162 words
A direct current transmitter having a variable transformation ratio comprising: a connection line having a pair of conductors for connecting a generator to a consumer; a choke connected in one of said conductors, said choke having a pair of secondary windings; a diode connected in said one conductor between said choke and the consumer; an electronic switch for controlling the flow of current in said choke connected to said conductors in bridging relation, said switch being connected to said one conductor between said choke and said diode; a first circuit operably connected with one of said secondary windings of said choke and said switch for controlling the voltage in said switch in response to the voltage in said one secondary winding; and a second circuit operably connected with the other of said secondary windings of said choke and said switch for controlling the switching of said switch between on and off position in response to the voltage in said other secondary winding.
Claim 2
Dependent Claim
162 words
A direct current transmitter having a variable transformation ratio comprising: a connection line having a pair of conductors for connecting a generator to a consumer; a choke connected in one of said conductors, said choke having a pair of secondary windings; a diode connected in said one conductor between said choke and the consumer; an electronic switch for controlling the flow of current in said choke connected to said conductors in bridging relation, said switch being connected to said one conductor between said choke and said diode; a first circuit operably connected with one of said secondary windings of said choke and said switch for controlling the voltage in said switch in response to the voltage in said one secondary winding; and a second circuit operably connected with the other of said secondary windings of said choke and said switch for controlling the switching of said switch between on and off position in response to the voltage in said other secondary winding.
Claim 3
Dependent Claim
20 words
A direct current transmitter as set forth in claim 1 wherein said second circuit includes a bidirectional controllAble auxiliary switch.
Claim 4
Dependent Claim
23 words
A direct current transmitter as set forth in claim 2 wherein said auxiliary switch is an antiparallel hookup of a pair of thyristors.
Claim 5
Dependent Claim
17 words
A direct current transmitter as set forth in claim 2 wherein said auxiliary switch is a triac.
Claim 6
Dependent Claim
17 words
A direct current transmitter as set forth in claim 2 wherein said auxiliary switch is a quadrac.
Claim 7
Dependent Claim
26 words
A direct current transmitter as set forth in claim 2 wherein said auxiliary switch alternately applies an auxiliary switch-on and switch-off voltage to said electronic switch.
Claim 8
Dependent Claim
47 words
A direct current transmitter as set forth in claim 1 wherein said second circuit directly blocks said electronic switch in response to a current variation in said choke of an amplitude at least equal to a value double the mean value of the current of said choke.
Claim 9
Dependent Claim
17 words
A direct current transmitter as set forth in claim 1 wherein said electronic switch is a transistor.
References Cited (Backward Citations)
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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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |