Patent US4632479A successfully refreshed from Google Patents.
US4632479A
Expired / Lapsed
US
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Safety terminal for electrical extension cord
Assignee: GEM ELECTRIC MANUFACTURING Co Inc A CORP OF NY
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Filing: 1980-11-20
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Granted: 1986-12-30
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Expires: 2000-11-20
Abstract
Abstract A safety-type terminal for an electrical extension cord, which protects against electrical shock and burn, comprises an elongated, elastomeric, non-conductive body; pairs of internal female contact strips which are spaced apart longitudinally of the body; contact slots for each female contact strip spread apart transversely of the body; and prong-admitting passageways from the exterior surface of the body to the female contact strips. The terminal further comprises electrically non-conductive safety guards each of which is arranged in line and beneath the mouths of a different pair of female contact slots. The safety guards contain prong-passing openings, the spacing of which matches the spacing of the body passageways. The safety guards are independently mounted so that they can reciprocally slide transversely to the length of the body in response to manual manipulation by a user between stops which define: a closed position in which the openings of each safety guard are disaligned with the passageways of the body and the safety guard blocks entry of an electrical prong through said body passageways, and an open position in which the openings of each safety guard are aligned with the passageways of the body, to thereby permit entry of the prongs through said body passageways. Thus, the safety guards can be manipulated into a position which will prevent accidental insertion of objects into the body passageways when said passageways are not engaged by an electrical plug.
Inventors
- 👤 Sol M. Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/44; H01R13/447; H01R2103/00; H01R24/00; H01R24/28; H01R25/00; H01R25/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
361 words
A safety type terminal for an electrical extension cord, said terminal comprising: an elongated body of electrically non-conductive elastomeric material; pairs of female contact means of electrically conductive material located within said body, the pairs of contact means being spaced apart longitudinally of the body and the contact means of each pair being spaced apart transversely of the body; means providing pairs of prong-admitting passageways from their mouths on an exterior surface of said body to said pairs of female contact means located internally of said body; said terminal further including elongated rectilinear safety guards of electrically nonconductive stiff material, each of which is arranged in line with and beneath the mouths of a different pair of contact means; means providing pairs of prong-passing openings through said safety guards, the spacing between said openings matching the transverse spacing between the passageways of the body for each pair of female contact means; means independently mounting said safety guards within said body for non-biased reciprocal sliding movement relative thereto transversely to the length of the body in response to manual manipulation by a user between stop means defining: a closed position of said safety guards in which the openings of each safety guard are disaligned with the passageways of the body and the safety guard blocks passage of electrical prongs through said body passageways and into engagement with said female contact means, and an open position of said safety guards in which the openings of each safety guard are aligned with the passageways of said body, to thereby permit passage of electrical prongs through said body passageways and into engagement with said female contact means; said mounting means defining a cavity within the body for each safety guard and spaced by said body from the exterior surfaces of said body, each said cavity snugly and frictionally receiving the associated safety guard, so that the safety guards will remain in any position in the body to which they manually are slid; and each safety guard having manually manipulative portions on opposite ends thereof, each such portion projecting beyond the side surface of said body to permit the user to press the proper such portion.
Claim 2
Dependent Claim
361 words
A safety type terminal for an electrical extension cord, said terminal comprising: an elongated body of electrically non-conductive elastomeric material; pairs of female contact means of electrically conductive material located within said body, the pairs of contact means being spaced apart longitudinally of the body and the contact means of each pair being spaced apart transversely of the body; means providing pairs of prong-admitting passageways from their mouths on an exterior surface of said body to said pairs of female contact means located internally of said body; said terminal further including elongated rectilinear safety guards of electrically nonconductive stiff material, each of which is arranged in line with and beneath the mouths of a different pair of contact means; means providing pairs of prong-passing openings through said safety guards, the spacing between said openings matching the transverse spacing between the passageways of the body for each pair of female contact means; means independently mounting said safety guards within said body for non-biased reciprocal sliding movement relative thereto transversely to the length of the body in response to manual manipulation by a user between stop means defining: a closed position of said safety guards in which the openings of each safety guard are disaligned with the passageways of the body and the safety guard blocks passage of electrical prongs through said body passageways and into engagement with said female contact means, and an open position of said safety guards in which the openings of each safety guard are aligned with the passageways of said body, to thereby permit passage of electrical prongs through said body passageways and into engagement with said female contact means; said mounting means defining a cavity within the body for each safety guard and spaced by said body from the exterior surfaces of said body, each said cavity snugly and frictionally receiving the associated safety guard, so that the safety guards will remain in any position in the body to which they manually are slid; and each safety guard having manually manipulative portions on opposite ends thereof, each such portion projecting beyond the side surface of said body to permit the user to press the proper such portion.
Claim 3
Dependent Claim
59 words
A safety type terminal as set forth in claim 1, wherein the stop means comprises shoulders on the manually manipulative portion of the safety guards, one of said shoulders defining the open position when abutting against the terminal body and the other of said shoulders defining the closed position when abutting against the exterior wall of the terminal body.
Claim 4
Dependent Claim
45 words
A safety type terminal as set forth in claim 1, wherein there are three pairs of prong-admitting passageways in the terminal body, and two safety guards, said two safety guards arranged to be capable of blocking entry of plug prongs into the endmost body passageways.
Claim 5
Dependent Claim
22 words
A safety type terminal as set forth in claim 1 wherein the safety guards contain indicia means for indicating the prevailing position.
Claim 6
Dependent Claim
28 words
A safety type terminal as set forth in claim 4 wherein the indicia means consist of the word "open", and the word "closed", on the appropriate end portions.
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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) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |