US4618222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective structure and method for working on sensitive electronic devices
Assignee: Northrop Grumman Corp
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Filing: 1984-08-27
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Granted: 1986-10-21
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Expires: 2004-08-27
Abstract
Abstract Described for protecting precision electronic components from contamination such as moisture introduced by human workers during manufacture, repair or inspection cycles of the components is a shield structure having a self supporting transparent base on which an electrostatic conduction layer is supported to prevent a build-up of an electrostatic charge, and to prevent moisture from impinging on the component.
Inventors
- 👤 Philip H. Eisenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:10
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0016; H; H05; H05F; H05F3/00; H05F3/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
In a processing station for manufacturing contaminatable parts on the slide stage of a microscope by an operator viewing through the microscope viewing stage, the improvement comprising a planar transparent cough shield mounted about said viewing stage, said shield extending laterally away from the microscope viewing stage in all directions in a plane generally normal to the viewing axis and oriented generally in a plane parallel to the face of the operator so that the operator may see through the cough shield for manipulating parts on the microscope slide stage, said shield extending below the viewing stage a distance sufficient to intercept the breath or cough of the operator, said shield being made of a self-supporting transparent layer, and a continuous anti-static sheet including a thin conductive film supported by said transparent layer to form an anti-static barrier thereon, said film extending fully across the transparent layer and said film being thin enough to be usefully transparent, means connecting the edges of said film to ground.
Claim 2
Dependent Claim
166 words
In a processing station for manufacturing contaminatable parts on the slide stage of a microscope by an operator viewing through the microscope viewing stage, the improvement comprising a planar transparent cough shield mounted about said viewing stage, said shield extending laterally away from the microscope viewing stage in all directions in a plane generally normal to the viewing axis and oriented generally in a plane parallel to the face of the operator so that the operator may see through the cough shield for manipulating parts on the microscope slide stage, said shield extending below the viewing stage a distance sufficient to intercept the breath or cough of the operator, said shield being made of a self-supporting transparent layer, and a continuous anti-static sheet including a thin conductive film supported by said transparent layer to form an anti-static barrier thereon, said film extending fully across the transparent layer and said film being thin enough to be usefully transparent, means connecting the edges of said film to ground.
Claim 3
Dependent Claim
39 words
The structure of claim 1 in which the anti-static film comprises a composite sheet of three layers, the center layer being a continuous metallic layer, and the outer two layers being of plastic material to protect the metallic layer.
Claim 4
Dependent Claim
42 words
The structure of claim 1 in which said means connecting the film to ground includes a metallic rim extending around the periphery of the shield and anti-static sheet, the rim providing an electrically conductive connection of the conductive film to the ground.
Claim 5
Dependent Claim
38 words
The structure of claim 3 further including a plurality of metallic fastening members which retain the rim, shield and anti-static sheet in assembled relationship, and which further provides electrically conductive connection between the conductive film and the rim.
Claim 6
Dependent Claim
24 words
The structure of claim 1 wherein the continuous conductive film is formed by deposition of material directly on the surface of the transparent layer.
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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |