US3604622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roentgenogram-taking condition conversion scale
Assignee: Individual
•
Filing: 1970-01-15
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Granted: 1971-09-14
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Expires: 1990-01-15
Abstract
Abstract A condition conversion scale assembly for selecting proper exposure conditions for Roentgenograms is constructed of three coaxial disc scales, one of tube current, one of exposure time, and a third scale of exposure distance and combined together for conversion. By relatively turning the three scales about in common axis, proper conditions for taking a Roentgenogram is selected or converted.
Inventors
- 👤 Yoshihiko Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:08
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/02; G06G1/10; G06G1/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
An X-ray exposure condition conversion scale assembly comprising: a first disc having a first log scale in the vicinity of the periphery thereof, a second disc having a second log scale on the periphery thereof, said second disc being coaxially mounted on said first disc and having a smaller diameter than that of said first disc, and a third disc having scale graduations of the square root of said second log scale, said third disc being coaxially mounted with said first and second discs and having a larger diameter than that of said first disc, said first scale comprising exposure time graduations, said second scale comprising tube graduations, and said third scale comprising exposure distance graduations.
Claim 2
Dependent Claim
116 words
An X-ray exposure condition conversion scale assembly comprising: a first disc having a first log scale in the vicinity of the periphery thereof, a second disc having a second log scale on the periphery thereof, said second disc being coaxially mounted on said first disc and having a smaller diameter than that of said first disc, and a third disc having scale graduations of the square root of said second log scale, said third disc being coaxially mounted with said first and second discs and having a larger diameter than that of said first disc, said first scale comprising exposure time graduations, said second scale comprising tube graduations, and said third scale comprising exposure distance graduations.
Claim 3
Dependent Claim
43 words
The X-ray exposure conversion scale assembly as claimed in claim 1 wherein said third disc is a fan-shaped sector, lies intermediate said first and second discs and said second disc includes a cutout peripheral portion to expose the scale of said third disc.
Claim 4
Dependent Claim
124 words
An X-ray exposure condition conversion scale assembly comprising: three discs of varying diameter, a first disc carrying a graduated log scale for tube current a second disc carrying a graduated log scale of exposure time in the opposite direction to that of said one scale and a third disc carrying a graduated scale of the square root of the first log scale for tube current and in the same direction to indicate exposure distance, and means for mounting said discs for rotation about a common axis such that said tube current and exposure time graduations are exposed opposite each other and said exposure distance scale can be varied during rotation of said second disc with respect to the relatively fixed first and third discs.
Claim 5
Dependent Claim
124 words
An X-ray exposure condition conversion scale assembly comprising: three discs of varying diameter, a first disc carrying a graduated log scale for tube current a second disc carrying a graduated log scale of exposure time in the opposite direction to that of said one scale and a third disc carrying a graduated scale of the square root of the first log scale for tube current and in the same direction to indicate exposure distance, and means for mounting said discs for rotation about a common axis such that said tube current and exposure time graduations are exposed opposite each other and said exposure distance scale can be varied during rotation of said second disc with respect to the relatively fixed first and third discs.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |