Patent US3410189A successfully refreshed from Google Patents.
US3410189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable width exposure slit
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1966-02-11
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Granted: 1968-11-12
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Expires: 1986-02-11
Abstract
No abstract record available.
Inventors
- 👤 Spokowski Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:54
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/36; G03B9/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
APPARATUS FOR VARYING THE WIDTH OF AN OPTICAL SLIT COMRPISING: FIRST AND SECOND APERTURE SLIT BLADES EACH HAVING AN EDGE, SAID EDGES OPPOSED TO ONE ANOTHER TO DEFINE AN APERTURE SLIT BY THE SEPARATION THEREBETWEEN; AT LEAST ONE OF SAID BLADES SLIDABLY SUPPORTED UPON A PAIR OF TRACKS; A BAR AFFIXED TO AND EXTENDING FROM SAID ONE BLADE; A SHAFT RIGIDLY AFFIXED TO SAID EXTENDED PORTION OF SAID BAR; A CAM FOLLOWER ATTACHED TO SAID SHAFT FREE TO ROTATE ABOUT SAID SHAFT; A CAM HAVING AT LEAST A FIRST SURFACE THEREON COACTING WITH SAID CAM FOLLOWER SUCH THAT POINT CONTACT IS MAINTAINED BETWEEN SAID SURFACE AND SAID CAM FOLLOWER; DRIVE MEANS COUPLED TO SAID CAM TO ROTATE SAID CAM THEREBY CAUSING SAID SLIT TO VARY IN PROPORTION TO THE CONTOUR OF SAID SURFACE.
Claim 2
Dependent Claim
133 words
APPARATUS FOR VARYING THE WIDTH OF AN OPTICAL SLIT COMRPISING: FIRST AND SECOND APERTURE SLIT BLADES EACH HAVING AN EDGE, SAID EDGES OPPOSED TO ONE ANOTHER TO DEFINE AN APERTURE SLIT BY THE SEPARATION THEREBETWEEN; AT LEAST ONE OF SAID BLADES SLIDABLY SUPPORTED UPON A PAIR OF TRACKS; A BAR AFFIXED TO AND EXTENDING FROM SAID ONE BLADE; A SHAFT RIGIDLY AFFIXED TO SAID EXTENDED PORTION OF SAID BAR; A CAM FOLLOWER ATTACHED TO SAID SHAFT FREE TO ROTATE ABOUT SAID SHAFT; A CAM HAVING AT LEAST A FIRST SURFACE THEREON COACTING WITH SAID CAM FOLLOWER SUCH THAT POINT CONTACT IS MAINTAINED BETWEEN SAID SURFACE AND SAID CAM FOLLOWER; DRIVE MEANS COUPLED TO SAID CAM TO ROTATE SAID CAM THEREBY CAUSING SAID SLIT TO VARY IN PROPORTION TO THE CONTOUR OF SAID SURFACE.
References Cited (Backward Citations)
US2485089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |