US3775729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety cord plug adaptor for electric outlet boxes
Assignee: Individual
•
Filing: 1972-05-01
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Granted: 1973-11-27
•
Expires: 1992-05-01
Abstract
Abstract A safety protective cover for electrical wall outlet includes hollow housing, and means for releasably affixing same over at least one plug-in receptacle of outlet with plug-in electric cord extending from housing. Stop means on cord and housing, after plugging cord in receptacle and subsequent attachment of housing to wall outlet, effective independently of the plug to prevent unplugging of the same due to a child tugging on the cord.
Inventors
- 👤 R Casper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:42
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/639; H01R13/6395
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
221 words
A cover for an electrical wall outlet as for locking attachment of an electric extension-cord plug to a receptacle of the outlet comprising; a housing including at least one hollow, generally cup-shaped part having peripheral and outer-end wall portions; means on said housing for affixing the same to the wall at the outlet with a said cup-shaped part in cupped relationship over a said receptacle; aperture means provided in said cupshaped part adjacent the inner end thereof for wedging reception of a cord plug inwardly therethrough while the housing is free of the wall outlet; slot means provided in the wall portions of said cup-shaped part to communicate with said aperture means and extending to a said outer end wall, for permitting inward passage of the cord to extend through said outer-end wall portion, whereby said housing is attachable to the wall outlet with the cord extended from the end wall portion, subsequent to attachment of the cord plug to the fixed receptacle; and stop means adapted to be carried by a portion of said cord within said cup-shaped part for engagement with said outer-end wall portion for restraining outwardly applied tension on the cord which would otherwise tend to effect removal of the plug from the wall outlet, said stop member having staggered portions for wedging reception of the cord.
Claim 2
Dependent Claim
221 words
A cover for an electrical wall outlet as for locking attachment of an electric extension-cord plug to a receptacle of the outlet comprising; a housing including at least one hollow, generally cup-shaped part having peripheral and outer-end wall portions; means on said housing for affixing the same to the wall at the outlet with a said cup-shaped part in cupped relationship over a said receptacle; aperture means provided in said cupshaped part adjacent the inner end thereof for wedging reception of a cord plug inwardly therethrough while the housing is free of the wall outlet; slot means provided in the wall portions of said cup-shaped part to communicate with said aperture means and extending to a said outer end wall, for permitting inward passage of the cord to extend through said outer-end wall portion, whereby said housing is attachable to the wall outlet with the cord extended from the end wall portion, subsequent to attachment of the cord plug to the fixed receptacle; and stop means adapted to be carried by a portion of said cord within said cup-shaped part for engagement with said outer-end wall portion for restraining outwardly applied tension on the cord which would otherwise tend to effect removal of the plug from the wall outlet, said stop member having staggered portions for wedging reception of the cord.
Claim 3
Dependent Claim
49 words
A cover for a wall outlet as in claim 1, wherein said stop member is shapEd for snug complemental reception in the hollow of said cup-shaped part, said stop member having irregular passage means extending inwardly of a side thereof for adjusted inward wedging reception of the cord therethrough.
Claim 4
Dependent Claim
32 words
A cover for a wall outlet as in claim 1, the hollow of said cup-shaped part terminating in a seat portion for stop reception of said stop member affixed on the cord.
Claim 5
Dependent Claim
31 words
A cover for a wall outlet as in claim 3, said stop member and said seat portion being shaped for snug complemental reception of the stop member in said seat portion.
Claim 6
Dependent Claim
34 words
A cover for a wall outlet as in claim 4, said stop member being a cube-shaped block and said staggered portions thereof defining angularly disposed connecting passages in which the cord is wedgingly gripped.
Claim 7
Dependent Claim
161 words
A cover for an electrical wall outlet as for locking attachment of an electrical extension-cord plug to a receptacle of the outlet comprising: a housing including at least one hollow, generally cup-shaped part having peripheral and outer-end wall portions; and a base plate affixed to the housing, an aperture means being provided in housing for communicating with the hollow of said at least one cup-shaped part, in a position of affixed attachment of the base plate with the housing when positioned over the receptacle, and adapted to contain a said plug in said position of locking attachment thereof with reference to the receptacle; means associated with said housing including staggered portions defining a zig-zag passage for tight zig-zag wedging for reception of a portion of the extension cord to extend outwardly from the hollow of the housing, thereby to anchor the cord to the housing against removal of the plug from the receptacle as by pulling action applied to the cord.
Claim 8
Dependent Claim
161 words
A cover for an electrical wall outlet as for locking attachment of an electrical extension-cord plug to a receptacle of the outlet comprising: a housing including at least one hollow, generally cup-shaped part having peripheral and outer-end wall portions; and a base plate affixed to the housing, an aperture means being provided in housing for communicating with the hollow of said at least one cup-shaped part, in a position of affixed attachment of the base plate with the housing when positioned over the receptacle, and adapted to contain a said plug in said position of locking attachment thereof with reference to the receptacle; means associated with said housing including staggered portions defining a zig-zag passage for tight zig-zag wedging for reception of a portion of the extension cord to extend outwardly from the hollow of the housing, thereby to anchor the cord to the housing against removal of the plug from the receptacle as by pulling action applied to the cord.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |