US3336852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically actuated shutter
Assignee: Bell and Howell Co
•
Filing: 1965-07-07
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Granted: 1967-08-22
•
Expires: 1985-07-07
Abstract
No abstract record available.
Inventors
- 👤 Levin Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:50
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A LIGHT SHUTTER ADAPTED FOR USE IN AN OPTICAL INSTRUMENT AND THE LIKE AND COMPRISING A DIAPHRAGM DEFINING A NORMALLY ELASTICALLY CLOSED LIGHT PASSAGE; MAGNETIZABLE MEMBERS MOUNTED IN SAID DIAPHRAGM ABOUT SAID LIGHT PASSAGE; A SOLENOID MOUNTED ABOUT SAID DIAPHRAGM, AND MEANS CONNECTED TO SAID SOLENOID FOR RAPIDLY CAUSING A CURRENT OF SHORT DURATION IN SAID SOLENOID, THE CURRENT BEING PRODUCTIVE OF A PLURALITY OF SHORT-LIVED REPELLING MAGNETIC FIELDS TO TEMPORARILY MOVE SAID MAGNETIZABLE MEMBERS AWAY FROM EACH OTHER AND THEREBY TEMPORARILY TO DRAW THE DIAPHRAGM TO OPEN THE LIGHT PASSAGE.
Claim 2
Dependent Claim
91 words
A LIGHT SHUTTER ADAPTED FOR USE IN AN OPTICAL INSTRUMENT AND THE LIKE AND COMPRISING A DIAPHRAGM DEFINING A NORMALLY ELASTICALLY CLOSED LIGHT PASSAGE; MAGNETIZABLE MEMBERS MOUNTED IN SAID DIAPHRAGM ABOUT SAID LIGHT PASSAGE; A SOLENOID MOUNTED ABOUT SAID DIAPHRAGM, AND MEANS CONNECTED TO SAID SOLENOID FOR RAPIDLY CAUSING A CURRENT OF SHORT DURATION IN SAID SOLENOID, THE CURRENT BEING PRODUCTIVE OF A PLURALITY OF SHORT-LIVED REPELLING MAGNETIC FIELDS TO TEMPORARILY MOVE SAID MAGNETIZABLE MEMBERS AWAY FROM EACH OTHER AND THEREBY TEMPORARILY TO DRAW THE DIAPHRAGM TO OPEN THE LIGHT PASSAGE.
References Cited (Backward Citations)
US1934519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |