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US5176539A Expired / Lapsed US ⏱️ 0.0 years remaining

Safety plug

Assignee: Individual
•
Filing: 1992-03-18
•
Granted: 1993-01-05
•
Expires: 2012-03-18
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Abstract

Abstract A safety plug comprising a plastic casing having two separate wire holes for inserting the positive and negative conductors of an electric wire and a chamber on a top edge thereof covered by a cover, said chamber having a first female projection and a second female projection connected by a fuse, said cover having two male projections respectively inserted into holes on said first and second female projections to secure said fuse in place, wherein the positive plug pin is connected to said first female projection, the negative plug pin is directly connected to the negative conductor of said electric wire, and the positive conductor of said electric wire is connected to said second female projection. The fuse is burnt out to cut off the circuit upon overload on the electric wire.

Inventors

  • 👤 Louis Liu

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 18:42
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/66; H01R13/68

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 126 words
A safety plug of the type having a plastic casing with positive and negative plug pins connected to the positive and negative conductors of an electric wire, and characterized in that said plastic casing comprises a chamber on a top edge thereof covered by a cover, and two separate wire holes for inserting the positive and negative conductors of said electric wire, said chamber having a first female projection and a second female projection connected by a fuse, said cover having two male projections respectively inserted into holes on said first and second female projections to secure said fuse in place, the positive conductor of said electric wire being connected to said fist female projection, the positive plug pin being connected to said second female projection.
Claim 2
Dependent Claim 126 words
A safety plug of the type having a plastic casing with positive and negative plug pins connected to the positive and negative conductors of an electric wire, and characterized in that said plastic casing comprises a chamber on a top edge thereof covered by a cover, and two separate wire holes for inserting the positive and negative conductors of said electric wire, said chamber having a first female projection and a second female projection connected by a fuse, said cover having two male projections respectively inserted into holes on said first and second female projections to secure said fuse in place, the positive conductor of said electric wire being connected to said fist female projection, the positive plug pin being connected to said second female projection.
Claim 3
Dependent Claim 45 words
The safety plug of claim 1, wherein the positive plug pin has a flat connecting end at one end of the pin body thereof for connection to said second female projection, said flat connecting end being longitudinally aligned with and perpendicular to said pin body.

References Cited (Backward Citations)

US2225718A Cited
FR1173785A Cited
US3436711A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1996-01-05 1996-07-06 1997-01-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-01-05 2000-07-06 2001-01-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-01-05 2004-07-06 2005-01-05 $7700.00 Window Closed / Lapsed

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