Patent US3693136A successfully refreshed from Google Patents.
US3693136A
Expired / Lapsed
US
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Electrical plug contact
Assignee: Emerson Electric Co
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Filing: 1970-02-09
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Granted: 1972-09-19
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Expires: 1990-02-09
Abstract
Abstract Electrical plug connectors of the male type, which are adapted to be matingly inserted into a female portion, wherein the male includes spring-biased, captive ball shaped members, preferably made of an insulating material such as a borosilicate glass for urging the male member against the corresponding arcuate contact surface of the female socket to which it is inserted with a relatively even distributed pressure, so that a substantial area of current contacting interface results. The male portion includes two different radii of curvature, at least one forming an arcuate contact surface in cross-section which subtends an arc of less than 180*.
Inventors
- 👤 Arthur I Appleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:02
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/02; H01R13/15; H01R13/22; H01R13/24; H01R13/2464; H01R13/2478
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
An electrical plug connector of the type incorporating a male prong which is adapted to be insertable into a female receptacle having a side wall and a connection surface of arcuate shape in cross-section, comprising, in combination, a plug body of substantially cylindrical shape adapted to receive a conductor at one end and a substantially cylindrical prong portion at the opposite end, the prong portion having two different radii of curvature, at least one radius forming an arcuate connection surface in cross-section which subtends an arc of less than 180*, said prong arcuate shaped connection surface including substantially the same radius of curvature as the receptacle surface, and captive mounted biasing means including at least one spherical ball formed of an electrically insulating material, laterally movable and trapped within said prong and a resilient element for urging said spherical ball laterally outwardly to engage a receptacle side wall, the biasing means biasing a substantial portion of the length of the arcuate shape of said prong into engagement with a corresponding arcuate portion of said receptacle.
Claim 2
Dependent Claim
175 words
An electrical plug connector of the type incorporating a male prong which is adapted to be insertable into a female receptacle having a side wall and a connection surface of arcuate shape in cross-section, comprising, in combination, a plug body of substantially cylindrical shape adapted to receive a conductor at one end and a substantially cylindrical prong portion at the opposite end, the prong portion having two different radii of curvature, at least one radius forming an arcuate connection surface in cross-section which subtends an arc of less than 180*, said prong arcuate shaped connection surface including substantially the same radius of curvature as the receptacle surface, and captive mounted biasing means including at least one spherical ball formed of an electrically insulating material, laterally movable and trapped within said prong and a resilient element for urging said spherical ball laterally outwardly to engage a receptacle side wall, the biasing means biasing a substantial portion of the length of the arcuate shape of said prong into engagement with a corresponding arcuate portion of said receptacle.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |