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US3816638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical box ground screw mounting
Assignee: BERKSHIRE GRAVURE Co LTD BROOKSIDE WOTTON-UNDER-EDGE GLOUCESTERSHIRE ENGLAND
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Filing: 1972-07-03
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Granted: 1974-06-11
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Expires: 1992-07-03
Abstract
Abstract In an electrical box having a hole in one side for receiving a ground screw, the portion of the wall immediately surrounding the ground screw hole is formed to entrap a ground wire placed under the ground screw so that the ground wire cannot escape from under the head of the ground screw as the ground screw is tightened down thereon.
Inventors
- 👤 A Appleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:19
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/58; H01R4/64; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/081; H02G3/083; H02G3/085
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
189 words
In an electrical box having a plurality of side walls and a bottom wall formed to contain a piece of electrical paraphernalia, said box including at least one wall with a flat portion containing a threaded hole therein for receiving a ground screw having a head sufficiently large to hold down a ground lead placed thereunder, the improvement comprising: said flat portion comprising a relatively small part of said one wall and being formed therefrom into a canted relationship relative to the rest of said one wall, a discreet part of said one wall being depressed relative to the rest of said one wall as a result of said canting and forming entrapment means between said flat portion and the rest of said one wall for guiding said ground lead adjacent said threaded hole when said ground screw is contained loosely therein, and for preventing said ground lead from escaping from under the head of said ground screw as the screw is tightened down on the ground lead, said flat portion being sufficiently canted relative to said one wall such that a perpendicular thereto intersects no other box wall.
Claim 2
Dependent Claim
189 words
In an electrical box having a plurality of side walls and a bottom wall formed to contain a piece of electrical paraphernalia, said box including at least one wall with a flat portion containing a threaded hole therein for receiving a ground screw having a head sufficiently large to hold down a ground lead placed thereunder, the improvement comprising: said flat portion comprising a relatively small part of said one wall and being formed therefrom into a canted relationship relative to the rest of said one wall, a discreet part of said one wall being depressed relative to the rest of said one wall as a result of said canting and forming entrapment means between said flat portion and the rest of said one wall for guiding said ground lead adjacent said threaded hole when said ground screw is contained loosely therein, and for preventing said ground lead from escaping from under the head of said ground screw as the screw is tightened down on the ground lead, said flat portion being sufficiently canted relative to said one wall such that a perpendicular thereto intersects no other box wall.
Claim 3
Dependent Claim
41 words
The improvement as set forth in claim 1, wherein said flat portion is located in the outermost portion of a side wall and away from said bottom wall whereupon it is relatively free of said paraphernalia and is therefore readily accessible.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |