Patent US3836233A successfully refreshed from Google Patents.
US3836233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-flash shutter with two compartments
Assignee: Impulsphysik GmbH
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Filing: 1971-12-23
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Granted: 1974-09-17
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Expires: 1991-12-23
Abstract
Abstract In a frame of the shutter an opening is provided for the passage of light, and at least three transparent plates extend across the opening to define with one another two compartments which the light must pass successively. Explosive charges are provided for opaquing both compartments simultaneously to thereby terminate the passage of light through the opening.
Inventors
- 👤 F Frungel
- 👤 H Lohse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:28
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/23; A; A61; A61F; A61F9/00; A61F9/02; A61F9/022; A61F9/023; G03; G03B; G03B9/00; G03B9/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
120 words
An anti-flash shutter, comprising a frame having an opening for the passage of light; first means extending across said opening and defining a chamber; second means also extending across said opening and subdividing said chamber into one compartment adapted to face the heat flash of a nuclear explosion and subject to destruction by such flash, and an axially successive additional compartment through which light must pass after passing through said one compartment; and third means for simultaneously terminating the passage of light through both of said compartments so that maximum opaquing of the shutter results upon the occurrence of a flash and opaquing of at least said additional compartment remains even in the event of destruction of said one compartment.
Claim 2
Dependent Claim
120 words
An anti-flash shutter, comprising a frame having an opening for the passage of light; first means extending across said opening and defining a chamber; second means also extending across said opening and subdividing said chamber into one compartment adapted to face the heat flash of a nuclear explosion and subject to destruction by such flash, and an axially successive additional compartment through which light must pass after passing through said one compartment; and third means for simultaneously terminating the passage of light through both of said compartments so that maximum opaquing of the shutter results upon the occurrence of a flash and opaquing of at least said additional compartment remains even in the event of destruction of said one compartment.
Claim 3
Dependent Claim
28 words
An anti-flash shutter as defined in claim 1, said center plate having a circumferential margin; and wherein said third means is located in the region of said margin.
Claim 4
Dependent Claim
45 words
An anti-flash shutter as defined in claim 1, said first means comprising at least two at least substantially parallel transparent outer plates spaced from one another so as to form said chamber, and said second means comprising a center plate located between said outer plates.
Claim 5
Dependent Claim
59 words
An anti-flash shutter as defined in claim 1, wherein said third means comprises at least one unit including a charge of carbon powder and an explosive adapted to discharge said carbon powder into one of said compartments, and at least one explosively vaporizable wire adapted to discharge into the other of said compartments and form a reflective layer therein.
Claim 6
Dependent Claim
19 words
An anti-flash shutter as defined in claim 3, said center plate being of a material having high thermal resistance.
Claim 7
Dependent Claim
34 words
An anti-flash shutter as defined in claim 3, said plates having circumferential margins sealingly connected with said frame; and wherein said frame is composed at least predominantly of elastomeric material which is resiliently yieldable.
Claim 8
Dependent Claim
15 words
An anti-flash shutter as defined in claim 6, wherein said elastomeric material is silicone rubber.
Claim 9
Dependent Claim
19 words
An anti-flash shutter as defined in claim 6, further comprising an electrically conductive additive admixed with said elastomeric material.
Claim 10
Dependent Claim
13 words
An anti-flash shutter as defined in claim 8, wherein said additive is graphite.
Claim 11
Dependent Claim
16 words
An anti-flash shutter as defined in claim 3, wherein said plates are of synthetic plastic material.
Claim 12
Dependent Claim
28 words
An anti-flash shutter as defined in claim 3, said third means being electrically activatable; and further comprising electrical conductor means and connecting plug means embedded in said frame.
Claim 13
Dependent Claim
23 words
An anti-flash shutter as defined in claim 3, said plates having circumferential margins, and said frame being profiled and sealingly engaging said margins.
Claim 14
Dependent Claim
44 words
An anti-flash shutter as defined in claim 3, said plates having circumferential margins connected with said frame; and further comprising an annular inwardly open member of U-shaped cross-section exteriorly embracing said frame and margins and maintaining the latter in tight engagement with the former.
Claim 15
Dependent Claim
14 words
An anti-flash shutter as defined in claim 13, said member being of metallic material.
Claim 16
Dependent Claim
15 words
An anti-flash shutter as defined in claim 13, said member being of synthetic plastic material.
Claim 17
Dependent Claim
17 words
An anti-flash shutter as defined in claim 13, said member being of glass-fiber reinforced synthetic plastic material.
Claim 18
Dependent Claim
25 words
An anti-flash shutter as defined in claim 13; and further comprising a strap overlying a radial edge face of said annular member in taut condition.
Claim 19
Dependent Claim
27 words
An anti-flash shutter as defined in claim 3, wherein said compartments are partially evacuated to an extent requisite for causing concave inward deformation of said outer plates.
Claim 20
Dependent Claim
22 words
An anti-flash shutter as defined in claim 3; further comprising spacing members interposed between said center plate and the respective outer plates.
Claim 21
Dependent Claim
21 words
An anti-flash shutter as defined in claim 3, wherein at least one of said plates is a filter for laser beams.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |