Patent US4131797A successfully refreshed from Google Patents.
US4131797A
Expired / Lapsed
US
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X-ray diagnostic installation for fluoroscopy and photography
Assignee: Siemens AG
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Filing: 1977-12-01
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Granted: 1978-12-26
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Expires: 1997-12-01
Abstract
Abstract In an illustrated embodiment, a switch control handle is shiftable from an upper position to a lower position to disconnect the fluoroscopic x-ray voltage and condition the circuitry for a transition to photographic exposure. Further downward shifting connects the x-ray high voltage until the automatic exposure control terminates the exposure. By coupling the control handle to a selector switch, a single manually adjustable set point potentiometer may select the fluoroscopy voltage set point in the upper position of the handle while adjusting the exposure time for patient constitution in the lower position.
Inventors
- 👤 Kurt Franke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:27
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/30; H05G1/38; H05G1/42; H05G1/44; H05G1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
An x-ray diagnostic installation for fluoroscopy and photography, comprising a fluoroscopic voltage adjustment means for adjusting fluoroscopic x-ray voltage, radiation measuring means for sensing the dose rate during photography, an automatic exposure timer for determining photographic time, connected with the radiation measuring means, and operable for switching off the x-ray energy upon attaining a predetermined dose, and a switch for switching over from fluoroscopy to photography, characterized in that a common adjustable set point slement is connected with the fluoroscopic voltage adjusting means for controlling the fluoroscopic voltage while the switch is conditioned for fluoroscopy, and is connectable to the automatic exposure timer for adjustment of the switch-off dose during transition to photography in response to actuation of said switch to switch over to photography.
Claim 2
Dependent Claim
125 words
An x-ray diagnostic installation for fluoroscopy and photography, comprising a fluoroscopic voltage adjustment means for adjusting fluoroscopic x-ray voltage, radiation measuring means for sensing the dose rate during photography, an automatic exposure timer for determining photographic time, connected with the radiation measuring means, and operable for switching off the x-ray energy upon attaining a predetermined dose, and a switch for switching over from fluoroscopy to photography, characterized in that a common adjustable set point slement is connected with the fluoroscopic voltage adjusting means for controlling the fluoroscopic voltage while the switch is conditioned for fluoroscopy, and is connectable to the automatic exposure timer for adjustment of the switch-off dose during transition to photography in response to actuation of said switch to switch over to photography.
References Cited (Backward Citations)
US3586860A
Cited
US3991314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |