Patent US4157855A successfully refreshed from Google Patents.
US4157855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric socket and plug
Assignee: Individual
•
Filing: 1977-09-19
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Granted: 1979-06-12
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Expires: 1997-09-19
Abstract
Abstract An electric socket adapted to receive a plug connected to the cord of an appliance such as a vacuum cleaner. In one embodiment of the invention there is provided in the socket a pair of bimetallic elements designed to deflect when heated causing the plug prongs to be released whereupon the plug is pushed from the socket under spring pressure. In other embodiments of the invention electromagnets are provided to cause the desired prong deflection for release of the plug. Appropriate circuitry is provided for the desired operation of the socket including release of the plug at remote as well as near locations with respect to the socket.
Inventors
- 👤 See F. Chan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:19
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/629; H01R13/633; H01R13/635; H01R13/66; H01R13/70; H01R13/713; Y; Y10; Y10S; Y10S439/00; Y10S439/923
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
An electric socket comprising an outer casing, an inner housing, a slide member disposed in the housing and adapted to engage a prong of an electric plug, power terminals adapted to become electrically connected to other prongs of the plug, a spring in outwardly biasing engagement with said slide member, there being provided bimetallic bars adapted in normal position to retain said other plug prongs, there being a coil wound on each bar in electrical connection with said member which on energizing is adapted to cause the deflection of said bars from plug retaining position thereby permitting the slide member to dislodge the plug from said socket.
Claim 2
Dependent Claim
107 words
An electric socket comprising an outer casing, an inner housing, a slide member disposed in the housing and adapted to engage a prong of an electric plug, power terminals adapted to become electrically connected to other prongs of the plug, a spring in outwardly biasing engagement with said slide member, there being provided bimetallic bars adapted in normal position to retain said other plug prongs, there being a coil wound on each bar in electrical connection with said member which on energizing is adapted to cause the deflection of said bars from plug retaining position thereby permitting the slide member to dislodge the plug from said socket.
Claim 3
Dependent Claim
94 words
An electric socket comprising an outer casing, an inner housing, a slide member disposed in the housing and adapted to engage a prong of an electric plug, power terminals adapted to become electrically connected to other prongs of the plug, a spring in outwardly biasing engagement with said slide member, detents in normal engagement with each of said other prongs and electromagnets in electric connection with said member and in control of said detant of cause them to disengage from said other prongs permitting the slide member to dislodge the plug from the socket.
Claim 4
Dependent Claim
94 words
An electric socket comprising an outer casing, an inner housing, a slide member disposed in the housing and adapted to engage a prong of an electric plug, power terminals adapted to become electrically connected to other prongs of the plug, a spring in outwardly biasing engagement with said slide member, detents in normal engagement with each of said other prongs and electromagnets in electric connection with said member and in control of said detant of cause them to disengage from said other prongs permitting the slide member to dislodge the plug from the socket.
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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) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |