Patent US2199825A successfully refreshed from Google Patents.
US3902002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grounding attachment for non-metallic enclosures
Assignee: General Electric Co
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Filing: 1974-02-13
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Granted: 1975-08-26
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Expires: 1994-02-13
Abstract
Abstract Grounding provision for a non-metallic electrical equipment enclosure includes a perimetrical electrically conductive metallic frame externally fitted to the enclosure adjacent the junctions of the enclosure sidewalls and backwall. Projections extend from the frame partially over knockouts formed in the enclosure walls. Removal of the knockouts to create openings in the enclosure exposes the projection free ends for electrical connection to electrical conduit admitted therethrough.
Inventors
- 👤 James I Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:41
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/081; H02G3/083; H02G3/085; H01; H01R; H01R4/00; H01R4/58; H01R4/64
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
135 words
An enclosure for electrical equipment, said enclosure comprising, in combination: A. an integral box-like housing formed of non-metallic material having sidewalls, a backwall, and an open front; B. a cover on said housing closing off said open front thereof; C. knockouts formed in at least one of said housing walls, said knockouts being removable to provide openings in said wall admitting metallic sheated electrical conductors; and D. electrically conductive grounding means including 1. a unitary frame fitted to said housing adjacent the junction of said sidewalls and backwall, and 2. projections extending from said frame partially over each of said knockouts, 3. whereby upon removal of selected knockouts, the free ends of said projections thereat are exposed in the created wall openings for electrical connection with the metallic sheaths of the conductors when admitted therethrough.
Claim 2
Dependent Claim
135 words
An enclosure for electrical equipment, said enclosure comprising, in combination: A. an integral box-like housing formed of non-metallic material having sidewalls, a backwall, and an open front; B. a cover on said housing closing off said open front thereof; C. knockouts formed in at least one of said housing walls, said knockouts being removable to provide openings in said wall admitting metallic sheated electrical conductors; and D. electrically conductive grounding means including 1. a unitary frame fitted to said housing adjacent the junction of said sidewalls and backwall, and 2. projections extending from said frame partially over each of said knockouts, 3. whereby upon removal of selected knockouts, the free ends of said projections thereat are exposed in the created wall openings for electrical connection with the metallic sheaths of the conductors when admitted therethrough.
Claim 3
Dependent Claim
11 words
projections extending from said frame partially over each of said knockouts,
Claim 4
Dependent Claim
11 words
projections extending from said frame partially over each of said knockouts,
Claim 5
Dependent Claim
44 words
The enclosure defined in claim 1, wherein said knockouts are archshaped and the free ends of said projections are arcuate, whereby, upon removal of said knockouts, each projection free end cooperates with the adjacent sidewall to define a circular opening into the enclosure interior.
Claim 6
Dependent Claim
16 words
The enclosure defined in claim 1, which further includes knockouts formed in said sidewalls and backwall.
Claim 7
Dependent Claim
33 words
whereby upon removal of selected knockouts, the free ends of said projections thereat are exposed in the created wall openings for electrical connection with the metallic sheaths of the conductors when admitted therethrough.
Claim 8
Dependent Claim
33 words
whereby upon removal of selected knockouts, the free ends of said projections thereat are exposed in the created wall openings for electrical connection with the metallic sheaths of the conductors when admitted therethrough.
Claim 9
Dependent Claim
27 words
The enclosure defined in claim 1, wherein said frame is perimetrical in configuration and the junctions of said sidewalls and backwall are recessed to accommodate said frame.
References Cited (Backward Citations)
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |