US3968397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Firing apparatus for a plurality of electric valves
Assignee: Siemens AG
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Filing: 1974-12-05
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Granted: 1976-07-06
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Expires: 1994-12-05
Abstract
Abstract The invention concerns a firing device for a number of electric valves, particularly thyristors. Each thyristor control path is associated with a firing circuit with a detector for electromagnetic radiation responsive to a transmitter which is controlled by a firing control signal and is equipped with a radiating device which energizes the individual detectors. To transmit the firing control signal with sufficient strength, a transmitter with a radiator is provided which is arranged in the focal line of a reflector designed as a partial elliptical cylinder. The individual detectors are disposed in a line which is aligned essentially parallel to the focal line of the reflector.
Inventors
- 👤 Stefan Frese
- 👤 Franz Mayerhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:29
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/088; H02M1/092
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
An apparatus for the simultaneous firing of a plurality of controllable semi-conductor rectifiers in a current rectifier for high voltages including a transmitter for electromagnetic radiation having radiating means and a reflector and a detector for each of the plurality of semi-conductor rectifiers, the individual detectors coupled to the firing circuits of their associated semi-conductor rectifiers, the improvement comprising: a. a reflector in the form of an elliptical partial cylinder; b. the radiator positioned at the first focus line of the elipse of said elliptical cylinder; and c. the plurality of detectors positioned at the second focus line of said elipse.
Claim 2
Independent Claim
101 words
An apparatus for the simultaneous firing of a plurality of controllable semi-conductor rectifiers in a current rectifier for high voltages including a transmitter for electromagnetic radiation having radiating means and a reflector and a detector for each of the plurality of semi-conductor rectifiers, the individual detectors coupled to the firing circuits of their associated semi-conductor rectifiers, the improvement comprising: a. a reflector in the form of an elliptical partial cylinder; b. the radiator positioned at the first focus line of the elipse of said elliptical cylinder; and c. the plurality of detectors positioned at the second focus line of said elipse.
Claim 3
Dependent Claim
12 words
The apparatus of claim 1 wherein the reflector has a metallic surface.
Claim 4
Dependent Claim
20 words
The apparatus of claim 1 wherein the radiator is positioned in the center of the focal line of the reflector.
Claim 5
Dependent Claim
28 words
The apparatus of claim 1 wherein said radiator is a rod having its axis of maximum radiation pointing at right angles to the focal line of the reflector.
Claim 6
Dependent Claim
12 words
The apparatus of claim 1 wherein said radiator is a point source.
Claim 7
Dependent Claim
29 words
The apparatus of claim 1 wherein said valves are arranged in a valve stack, the axis of which is aligned in parallel to the line of the individual detectors.
Claim 8
Dependent Claim
14 words
The apparatus of claim 1 wherein visible light is provided as the electromagnetic radiation.
Claim 9
Dependent Claim
14 words
The apparatus of claim 1 wherein infrared light is provided as the electromagnetic radiation.
Claim 10
Dependent Claim
14 words
The apparatus of claim 1 wherein UV light is provided as the electromagnetic radiation.
Claim 11
Dependent Claim
14 words
The apparatus of claim 1 wherein high-frequency radiation is provided as the electromagnetic radiation.
Claim 12
Dependent Claim
14 words
The apparatus of claim 10 wherein the high-frequency radiation is in the GHz range.
References Cited (Backward Citations)
US3134906A
Cited
US3567972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |