US3611257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric plug construction and method of manufacturing same
Assignee: SPRINGFIELD WIRE OF INDIANA IN
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Filing: 1969-08-26
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Granted: 1971-10-05
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Expires: 1989-08-26
Abstract
Abstract Electrical outlet plug which includes a core member encapsulated within a sheath. The core is formed with electrical contact blade-retaining bores through said core member opening in one direction to receive and retain the portion of the contact blades connected to a conductor wire, and opening in the other direction in close fitting peripheral relation about said blades. A pedestal projects outwardly of said core in a direction opposite the blades and is of sufficient size to serve as a base for supporting the core in a mold. The surfaces of the core peripheral to said blades extend outwardly of the core in a direction opposite the pedestal sufficiently to extend through said sheath and provide with the pedestal, mold bearing surfaces when the core is disposed in a mold cavity.
Inventors
- 👤 Carlton L Carkhuff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:14
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/20; H01R43/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
Electrical plug for insulated conductor wire comprising a preformed core member formed of electrical insulating material having sockets formed in said core, a terminal blade disposed in each of said sockets, the inner end of each blade connected to the bared end of said insulated conductor wire, said core including outwardly extending rim portions around said sockets and through which the outer portions of the terminal blades project, said core also including a stem portion projecting outwardly opposite said rim portions and a sheath of insulating material encapsulating the end portion of the blades and bared conductor wires with outer surfaces of the rims projecting through said encapsulating material to at least the outer surface thereof.
Claim 2
Dependent Claim
116 words
Electrical plug for insulated conductor wire comprising a preformed core member formed of electrical insulating material having sockets formed in said core, a terminal blade disposed in each of said sockets, the inner end of each blade connected to the bared end of said insulated conductor wire, said core including outwardly extending rim portions around said sockets and through which the outer portions of the terminal blades project, said core also including a stem portion projecting outwardly opposite said rim portions and a sheath of insulating material encapsulating the end portion of the blades and bared conductor wires with outer surfaces of the rims projecting through said encapsulating material to at least the outer surface thereof.
Claim 3
Dependent Claim
133 words
Electrical plug for insulated conductor wire comprising terminal blades extending outwardly of a plug body having an inner preformed core of electrical insulating material and an encapsulating sheath, the inner ends of said blades connected to the bared ends of said insulated conductor wire, said inner core having sockets formed therein in which the inner end portions of the terminal blades are disposed, said core including rim portions closelY surrounding the blades and being exposed through the sheath and a stem on said core extending opposite the rim portions thereof and having a portion of its outer surface exposed through the sheath, said stem and rim portions serving as oppositely extending mold bearing surfaces, said rim portions providing for sealing engagement with the mold cavity when said sheath is molded about the core.
Claim 4
Dependent Claim
133 words
Electrical plug for insulated conductor wire comprising terminal blades extending outwardly of a plug body having an inner preformed core of electrical insulating material and an encapsulating sheath, the inner ends of said blades connected to the bared ends of said insulated conductor wire, said inner core having sockets formed therein in which the inner end portions of the terminal blades are disposed, said core including rim portions closelY surrounding the blades and being exposed through the sheath and a stem on said core extending opposite the rim portions thereof and having a portion of its outer surface exposed through the sheath, said stem and rim portions serving as oppositely extending mold bearing surfaces, said rim portions providing for sealing engagement with the mold cavity when said sheath is molded about the core.
Claim 5
Dependent Claim
129 words
Electrical plug for insulated conductor wire comprising terminal blades extending outwardly of a molded plug body comprising an inner preformed core of flexibly resilient insulating material and an encapsulating sheath molded about said core, the inner ends of said blades connected to the bared ends of said insulated conductor wire, said core having sockets formed therein in which the inner end portions of the terminal blades are supported for assembly, said core including outstanding rim portions circumferentially disposed about said sockets and disposed around the portion of the blades extending from said sockets, a stem extending opposite said rim portion, outer surface portions of the rims and stem being unencapsulated having provided mold bearing surfaces within the cavity of the mold when the sheath is molded about said core.
Claim 6
Dependent Claim
129 words
Electrical plug for insulated conductor wire comprising terminal blades extending outwardly of a molded plug body comprising an inner preformed core of flexibly resilient insulating material and an encapsulating sheath molded about said core, the inner ends of said blades connected to the bared ends of said insulated conductor wire, said core having sockets formed therein in which the inner end portions of the terminal blades are supported for assembly, said core including outstanding rim portions circumferentially disposed about said sockets and disposed around the portion of the blades extending from said sockets, a stem extending opposite said rim portion, outer surface portions of the rims and stem being unencapsulated having provided mold bearing surfaces within the cavity of the mold when the sheath is molded about said core.
Claim 7
Dependent Claim
64 words
Electrical plug as set forth in claim 3 in which said cavities comprise bores extending through said core with enlarged entry openings for ease of assembly with said blades, said stem being disposed between said enlarged openings and providing a pedestal for supporting said core on one wall of a mold cavity with said rims sealingly engaged with the opposite wall of said cavity.
Claim 8
Dependent Claim
33 words
Electrical plug as set forth in claim 4 in which said bores include shoulders for retaining therein the inner end portion of said terminal blades, said core being formed of synthetic plastic material.
References Cited (Backward Citations)
US2047094A
Cited
US2249827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |