US4378501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply for triode x-ray tubes
Assignee: Sybron Transition Corp
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Filing: 1981-01-05
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Granted: 1983-03-29
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Expires: 2001-01-05
Abstract
Abstract A power supply provides high voltage for a grid controlled x-ray tube. In the supply an oscillator generates a high frequency signal which is amplified and transformed to kilovoltage. A voltage multiplier increases the kilovoltage to a potential suitable for the tube. The voltage multiplier includes a bank of series capacitors which tends to maintain a constant high voltage when the tube is not conducting.
Inventors
- 👤 David Cowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:36
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/10; H05G1/12; H05G1/22; H05G1/26; H05G1/30; H05G1/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
An X-ray power supply comprised of: an x-ray tube having a cathode, a grid, and an anode; an oscillator for generating a signal at a frequency substantially higher than line frequency; at least one linear amplifier connected to said oscillator to amplify said signal; a transformer having a primary and a seconary, the primary connected to said amplifier for transforming the amplified signal to a higher voltage across the secondary; a voltage multiplier, interposed between said secondary and the tube to provide a rectified voltage between the anode and the cathode at a multiple of the peak to peak voltage of the transformed amplified signal; pulse means for applying a plurality of voltage pulses to the tube grid resulting in a plurality of current pulses through the tube and corresponding plurality of x-ray emissions; and dosage means for turning off the X-ray when the current pulses integrated overtime corresponds to a desired X-ray dosage.
Claim 2
Dependent Claim
154 words
An X-ray power supply comprised of: an x-ray tube having a cathode, a grid, and an anode; an oscillator for generating a signal at a frequency substantially higher than line frequency; at least one linear amplifier connected to said oscillator to amplify said signal; a transformer having a primary and a seconary, the primary connected to said amplifier for transforming the amplified signal to a higher voltage across the secondary; a voltage multiplier, interposed between said secondary and the tube to provide a rectified voltage between the anode and the cathode at a multiple of the peak to peak voltage of the transformed amplified signal; pulse means for applying a plurality of voltage pulses to the tube grid resulting in a plurality of current pulses through the tube and corresponding plurality of x-ray emissions; and dosage means for turning off the X-ray when the current pulses integrated overtime corresponds to a desired X-ray dosage.
Claim 3
Dependent Claim
16 words
The X-ray power supply of claim 1 wherein the dosage means is a milliamp-second current integrator.
Claim 4
Dependent Claim
42 words
The X-ray power supply of claim 2 where the dosage means is a counter which counts the number of voltage pulses at the grid and turns the tube off when the number of voltage pulses reaches a value corresponding to desired dosage.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |