Patent US3757725A successfully refreshed from Google Patents.
US3757725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Right spherical segment-glass shell-to metal-joint
Assignee: United States Department of the Navy
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Filing: 1971-09-24
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Granted: 1973-09-11
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Expires: 1991-09-24
Abstract
Abstract An improved viewing window construction for deep submersible vehicles and a method of construction thereof is disclosed. A hemispherical glass dome is ground and lapped with an edge radius of twice the dome thickness and fitted on a congruently configured mating ring with a bimetallic gasket providing a strain relieving seal therefor.
Inventors
- 👤 G Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:32
CPC Classifications
B; B63; B63B; B63B19/00; B63B19/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
A viewing port for a deep submergence vehicle comprising in combination: transparent dome means having a convex edge for passing a wide angle of light therethrough; mounting ring means joined to the deep submergence vehicle on one side and concavely lap ground to mate with said convex edge of said transparent dome means on the other side along a radiused interface having a radius substantially greater in length than the thickness of the wall of said transparent dome, said mounting ring means having the same radial deflection characteristics of said transparent dome means for attachment to the hull of said deep submergence vehicle; and bilayer gasket means placed between said transparent dome means and said mounting ring means and for isolating strain transmission therethrough caused by the ratio of Poisson and Yound moduli of the materials from which said transparent dome means and said mounting ring means.
Claim 2
Dependent Claim
147 words
A viewing port for a deep submergence vehicle comprising in combination: transparent dome means having a convex edge for passing a wide angle of light therethrough; mounting ring means joined to the deep submergence vehicle on one side and concavely lap ground to mate with said convex edge of said transparent dome means on the other side along a radiused interface having a radius substantially greater in length than the thickness of the wall of said transparent dome, said mounting ring means having the same radial deflection characteristics of said transparent dome means for attachment to the hull of said deep submergence vehicle; and bilayer gasket means placed between said transparent dome means and said mounting ring means and for isolating strain transmission therethrough caused by the ratio of Poisson and Yound moduli of the materials from which said transparent dome means and said mounting ring means.
Claim 3
Dependent Claim
20 words
A viewing port according to claim 1 in which said transparent dome means includes a one piece borosilicate glass hemisphere.
Claim 4
Dependent Claim
117 words
A viewing port for deep submergence vehicles comprising in combination: transparent dome means for passing a wide angle of light therethrough; mounting ring means concavely lap ground to mate with a convex edge of said transparent dome means along a radiused interface having a radius of curvature of twice the thickness of said transparent dome means and having the same radial deflection characteristics thereas for attachment to the hull of said deep submergence vehicles; and bilayer gasket means placed between said transparent dome means and said mounting ring means and for isolating strain transmission therethrough caused by the ratio of Poisson and Young moduli of the materials of said transparent dome means and said mounting ring means.
Claim 5
Dependent Claim
117 words
A viewing port for deep submergence vehicles comprising in combination: transparent dome means for passing a wide angle of light therethrough; mounting ring means concavely lap ground to mate with a convex edge of said transparent dome means along a radiused interface having a radius of curvature of twice the thickness of said transparent dome means and having the same radial deflection characteristics thereas for attachment to the hull of said deep submergence vehicles; and bilayer gasket means placed between said transparent dome means and said mounting ring means and for isolating strain transmission therethrough caused by the ratio of Poisson and Young moduli of the materials of said transparent dome means and said mounting ring means.
Claim 6
Dependent Claim
152 words
A viewing port for a deep submergence vehicle comprising in combination: a transparent borosilicate glass hemisphere for passing a wide angle of light therethrough; a mounting ring made of titanium and joined to the deep submergence vehicle on one side and lap ground to mate with said transparent dome means on the other side along a radiused interface having a radius substantially greater in length than the thickness of the wall of said transparent dome, said mounting ring means having the same radial deflection characteristics of said transparent dome means for attachment to the hull of said deep submergence vehicle; and bilayer gasket means placed between said transparent dome means and said moutning ring means and configured to isolate strain transmission therethrough caused by the ratio of Poisson and Young moduli of the materials from which said transparent dome means and said mounting ring means are fabricated for effective strain isolation therebetween.
Claim 7
Dependent Claim
152 words
A viewing port for a deep submergence vehicle comprising in combination: a transparent borosilicate glass hemisphere for passing a wide angle of light therethrough; a mounting ring made of titanium and joined to the deep submergence vehicle on one side and lap ground to mate with said transparent dome means on the other side along a radiused interface having a radius substantially greater in length than the thickness of the wall of said transparent dome, said mounting ring means having the same radial deflection characteristics of said transparent dome means for attachment to the hull of said deep submergence vehicle; and bilayer gasket means placed between said transparent dome means and said moutning ring means and configured to isolate strain transmission therethrough caused by the ratio of Poisson and Young moduli of the materials from which said transparent dome means and said mounting ring means are fabricated for effective strain isolation therebetween.
Claim 8
Dependent Claim
44 words
A viewing port according to claim 1 in which said bilayer gasket means includes: a mounting ring contacting layer made of spinning grade, long asbestos fiber held in a heat-resistant, non-reverting synthetic rubber binder; and a transparent dome contacting layer made of titanium metal.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |