US3889279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically operated photographic shutter in microphotographic mechanisms
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1973-01-08
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Granted: 1975-06-10
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Expires: 1993-01-08
Abstract
Abstract Electromagnetically operable shutter for microphotographic devices, wherein the shutter has two angular slides movable substantially at right angles to the optical axis of the shutter and rotatably mounted approximately at the apex of the angles, the first angle blades of these slides covering, in the closed position, the light passage aperture while the second angle blades are opposed to the poles of two magnet cores and the second angle blades are disposed in one side of the optical axis of the light passage aperture with the magnet cores and the electromagnets.
Inventors
- 👤 Heinrich Klemann
- 👤 Herbert Leiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:31
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/10; G03B9/14; G02; G02B; G02B21/00; G02B21/36; G02B21/362; G03B9/58
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
218 words
A compound lens system having an optical axis, a photographic image recorder along said optical axis, and means for optically viewing through said lens system located to one side of said optical axis, the improvement comprising an electromagnetically operated shutter having electromagnets for said recorder comprising: a light passage aperture along said optical axis; first shutter blade means having a first blade and a second blade extending from a first apex at an angle to one another; second shutter blade means having a third blade and a fourth blade extending from a second apex at an angle to one another; said first and second shutter blade means located between said means for viewing and said photographic image recorder; said first and second shutter blade means having means for rotatably mounting at said first and second apex, said means for rotatably mounting having second and third axes parallel to said optical axis; said second and third axes disposed to the opposite side of said optical axis from said means for optically viewing; said first and third blades cooperating to cover said aperture in the closed position; and said second and fourth blades actuated by said electromagnets having magnetic cores and said electromagnets and magnetic cores disposed on one side of said optical axis opposite said means for optically viewing.
Claim 2
Dependent Claim
218 words
A compound lens system having an optical axis, a photographic image recorder along said optical axis, and means for optically viewing through said lens system located to one side of said optical axis, the improvement comprising an electromagnetically operated shutter having electromagnets for said recorder comprising: a light passage aperture along said optical axis; first shutter blade means having a first blade and a second blade extending from a first apex at an angle to one another; second shutter blade means having a third blade and a fourth blade extending from a second apex at an angle to one another; said first and second shutter blade means located between said means for viewing and said photographic image recorder; said first and second shutter blade means having means for rotatably mounting at said first and second apex, said means for rotatably mounting having second and third axes parallel to said optical axis; said second and third axes disposed to the opposite side of said optical axis from said means for optically viewing; said first and third blades cooperating to cover said aperture in the closed position; and said second and fourth blades actuated by said electromagnets having magnetic cores and said electromagnets and magnetic cores disposed on one side of said optical axis opposite said means for optically viewing.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 wherein said first and third blades comprise non-magnetic material and said second and fourth blades comprise magnetic material.
Claim 4
Dependent Claim
29 words
The apparatus of claim 1 wherein said first, second, third and fourth blades comprise non-magnetic material and said second and fourth blades are studded with pieces of magnetic material.
Claim 5
Dependent Claim
29 words
The apparatus of claim 1 further comprising one magnetic flux circuit for opening and another magnetic flux circuit for the closing of said first and second shutter blade means.
Claim 6
Dependent Claim
29 words
The apparatus of claim 1 further comprising two magnetic flux circuits for the opening and closing of said first and second shutter blade means arranged separately from each other.
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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |