Direct-current transformer having a single common magnetic circuit
Abstract
Abstract A DEVICE FOR TRANSFORMING DIRECT CURRENT COMPRISES A SINGLE MAGNETIC CIRCUIT WHICH HAS A VARIABLE MAGNETIC FIELD IN WHICH THE GALVONOMAGNETIC RESISTANCE MEMBERS OF A BRIDGE NETWORK ARE LOCATED. THE MAGNETIC CIRCUIT HAS WINDING MEANS FOR PROVIDING THE CONTROLLING FIELD EXCITATION IN DEPENDENCE UPON THE DIRECT CURRENT TO BE TRANSFORMED. A DIRECT-CURRENT AMPLIFIER HAS ITS INPUT CONNECTED TO THE BRIDGE NETWORK AND HAS ITS OUTPUT CIRCUIT IN NEGATIVE FEEDBACK CONNECTION WITH THE WINDING MEANS TO PROVIDE THE MAGNETIC CIRCUIT WITH FEEDBACK EXCITATION OPPOSED TO THE CONTROLLING EXCITATION. THE MAGNETIC CIRCUIT IS AT LEAST IN PART MAGNETICALLY SATURABLE AT MAGNITUDES OF THE FEEDBACK EXCITATION ABOVE PREDETERMINED LIMIT VALUE.
Inventors
- 👤 Hans Hieronymus
- 👤 Hans Martens
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |