Patent US2304053A successfully refreshed from Google Patents.
Patent US4019797A successfully refreshed from Google Patents.
US4019797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System including household connector plug for split wire receptacle
Assignee: Individual
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Filing: 1975-11-17
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Granted: 1977-04-26
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Expires: 1995-11-17
Abstract
Abstract This relates to an electrical connecting device or plug, preferably of the U-grounded type, which when plugged into a standard split wire duplex receptacle will double the voltage potential available at the receptacle. A modified form of the invention comprises an electrical connecting device or plug which when plugged into a standard split wire duplex receptacle will provide an option of either doubling the voltage potential available at the receptacle or, alternatively, operating as a single plug for a pair of appliances, each at normal household voltage.
Inventors
- 👤 Henry W. Praml
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:57
CPC Classifications
H; H01; H01R; H01R29/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
257 words
A unitary electrical connecting plug constructed to mate with a standard split wire duplex receptacle having two electrically isolated female slots respectively connected to high potential power terminals at substantially equal and opposite potential, two female neutral slots electrically connected together to a neutral terminal at a potential substantially halfway between the potentials of said high potential power terminals, and means comprising one or more slots for connection to ground potential, said plug comprising in combination: an insulative housing having a rear wall including connecting means to an insulating conduit, side walls and a front wall opposite said rear wall, electrically conducting ground means rigidly disposed in said housing to extend outwardly in a substantially normal direction from the external face of said front wall and to extend inwardly to conducting means for making ground contact, and at least one pair of electrically conducting power blades insulated from each other and from said ground means, said pair rigidly disposed in said housing and extending outwardly in substantially normal direction from the face of said front wall and extending inwardly in said housing to separately insulated conducting means constructed for connection to a pair of electrically isolated high potential contacts, said power blades spaced apart on the external surface of said front face a distance which coincides with the spacing between said two electrically isolated high potential female slots of said split wire duplex receptacle, and constructed and arranged to engage said slots simultaneously as said ground means engages said means comprising a slot for connection to ground.
Claim 2
Dependent Claim
257 words
A unitary electrical connecting plug constructed to mate with a standard split wire duplex receptacle having two electrically isolated female slots respectively connected to high potential power terminals at substantially equal and opposite potential, two female neutral slots electrically connected together to a neutral terminal at a potential substantially halfway between the potentials of said high potential power terminals, and means comprising one or more slots for connection to ground potential, said plug comprising in combination: an insulative housing having a rear wall including connecting means to an insulating conduit, side walls and a front wall opposite said rear wall, electrically conducting ground means rigidly disposed in said housing to extend outwardly in a substantially normal direction from the external face of said front wall and to extend inwardly to conducting means for making ground contact, and at least one pair of electrically conducting power blades insulated from each other and from said ground means, said pair rigidly disposed in said housing and extending outwardly in substantially normal direction from the face of said front wall and extending inwardly in said housing to separately insulated conducting means constructed for connection to a pair of electrically isolated high potential contacts, said power blades spaced apart on the external surface of said front face a distance which coincides with the spacing between said two electrically isolated high potential female slots of said split wire duplex receptacle, and constructed and arranged to engage said slots simultaneously as said ground means engages said means comprising a slot for connection to ground.
Claim 3
Dependent Claim
39 words
An electrical connecting plug in accordance with claim 1 constructed to mate with a standard split wire duplex receptacle wherein said electrically isolated female slots are each connected to high potential power terminals carrying alternating curent substantially 180° out-of-phase.
Claim 4
Dependent Claim
36 words
An electrical connecting plug in accordance with claim 1 constructed to mate with a standard split wire duplex receptacle wherein said electrically isolated female receptacles are each connected to high potential power terminals carrying direct current.
Claim 5
Dependent Claim
106 words
A plug in accordance with claim 1 wherein the means in said receptacle comprising one or more slots for connection to ground potential comprises one ground slot disposed in each half of said duplex receptacle, and said electrically conducting ground means rigidly diposed in said housing comprises a pair of ground prongs disposed to extend outwardly in a substantially normal direction from the external face of said front wall, said ground prongs in said plug electrically connected together and constructed to engage the corresponding ground slots in said receptacle simultaneously as the power blades of said one pair engage said electrically isolated high potential female slots.
Claim 6
Dependent Claim
83 words
A plug in accordance with claim 4 comprising a second pair of electrically conducting neutral blades connected together in electrically conducting relation, said blades spaced apart on the external surface of said front face a distance which coincides with the spacing between said female neutral slots of said split wire duplex receptacle and constructed and arranged to engage said slots simultaneously as the blades of said one pair engage said high potential female slots, and said ground prongs engage the ground slots thereof.
Claim 7
Dependent Claim
111 words
In combination with a plug in accordance with claim 4, an appliance requiring power at a potential substantially exceeding the potential to be derived across one high potential power slot and the corresponding neutral slot of said split wire duplex receptacle, said appliance having a high potential conductor, a low potential conductor and a ground conductor in mutually insulated relation in an insulating conduit, said conduit connected into said plug through said connecting means, said high and low potential conductors respectively connected across said one pair of electrically conducting high potential power blades of said plug, and said ground conductor connected through conducting means to the ground prongs of said plug.
Claim 8
Dependent Claim
50 words
A combination in accordance wih claim 6 wherein said appliance is constructed to require power of at least about 220 volts, and wherein the potential derived between one said high potential slot and the corresponding neutral slot on one side of said duplex receptacle does not exceed about 125 volts.
Claim 9
Dependent Claim
113 words
In combination with a plug in accordance with claim 5, an appliance requiring power at a potential substantially exceeding the potential to be derived across one high potential power slot and the corresponding neutral slot included in one outlet of said split wire duplex receptacle, said appliance having a high potential conductor, a low potential conductor and a ground conductor in an insulating conduit, said conduit connected into said plug through said connecting means, said high and low potential conductors respectively connected across said one pair of electrically conducting high potential power blades, said second pair of neutral power blades being electrically strapped together, and said ground conductor connected to said ground prongs.
Claim 10
Dependent Claim
50 words
The combination in accordance with claim 8 wherein said appliance is constructed to require power of at least about 220 volts, and wherein the potential derived between one high potetential slot and the corresponding neutral slot included in one outlet of said duplex receptacle does not exceed about 125 volts.
Claim 11
Independent Claim
112 words
The method of doubling the potential of electrical power derived by an appliance from a standard split wire duplex receptacle having two isolated female slots respectively disposed at opposite ends, said slots being respectively connected to high potential power terminals at substantially equal and opposite potentials, two corresponding female slots electrically connected together to a neutral terminal, and a pair of slots connected together for ground contact, which comprises the steps of: simultaneously connecting the high and low potential terminals of said appliance between the said two electrically isolated high potential female slots of said receptacle, and simultaneously connecting the ground contact of said appliance into the ground slots of said receptacle.
Claim 12
Independent Claim
112 words
The method of doubling the potential of electrical power derived by an appliance from a standard split wire duplex receptacle having two isolated female slots respectively disposed at opposite ends, said slots being respectively connected to high potential power terminals at substantially equal and opposite potentials, two corresponding female slots electrically connected together to a neutral terminal, and a pair of slots connected together for ground contact, which comprises the steps of: simultaneously connecting the high and low potential terminals of said appliance between the said two electrically isolated high potential female slots of said receptacle, and simultaneously connecting the ground contact of said appliance into the ground slots of said receptacle.
References Cited (Backward Citations)
US3784953A
Cited
US3861773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |