US3588511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutter arrangement for radiography
Assignee: Individual
•
Filing: 1968-05-31
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Granted: 1971-06-28
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Expires: 1988-05-31
Abstract
Abstract RADIOGRAPHS ARE MADE BY EXPOSURES OF X-RAYS UPON A PHOTOGRAPHIC SURFACE WHEREIN X-RAY IMPERVIOUS SHUTTERS ARE INDEPENDENTLY POSITIONABLE TO PROVIDE AN APERTURE FOR EXPOSING A DESIRED AREA OF THE PHOTOGRAPHIC SURFACE, AND FOR BLOCKING RADIATION TO OTHER AREAS. ELECTRICAL CONTACTS ARE PROVIDED ON THE SHUTTERS WHICH WILL CLOSE AN ELECTRICAL CIRCUIT TO CUT THE POWER OF DRIVE MOTORS WHEN EITHER SHUTTER REACHES THE LIMIT OF ITS TRAVEL, OR WHEN THE TWO SHUTTERS CLOSE TOGETHER. THE SHUTTERS ARE MECHANICALLY SUPPORTED BY ELECTIRCALLY INSULATED CABLES WHICH FURTHER PROVIDE A CONNECTING CIRCUIT BETWEEN ELECTRICAL CONTACTS ON THE SHUTTERS AND THE MOTOR CONTROL SYSTEM.
Inventors
- 👤 James R Montagne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:16
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/04; A; A61; A61B; A61B6/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |