Patent US5338218A successfully refreshed from Google Patents.
US5338218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical appliance current supply control apparatus
Assignee: Individual
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Filing: 1993-03-16
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Granted: 1994-08-16
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Expires: 2013-03-16
Abstract
Abstract Electrical appliance current supply control apparatus in which there is positioned between an appliance plug with current pickup prongs and current input supply prongs a housing having electrical current carrying leads interconnecting the current input supply prongs and the current pickup prongs in which housing one of the electrical current carrying leads is led through a control in the housing which includes a key operated lock to either complete the current supply or to interrupt the current supply to the appliance pickup prongs through the one lead.
Inventors
- 👤 Norman C. Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:06
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/60; H01R13/66; H01R13/70; H01R13/62; H01R13/639; H01R13/6397; H01R31/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
185 words
Electrical appliance current supply control apparatus for use with an appliance having a current supply cord with standard electrical current receiving plug prongs having standard sized apertures in the plug prongs, said control apparatus comprising: a) a housing: b) an electrical receptacle in said housing formed with prong slots to receive said appliance cord mounted plug formed with standard prongs; c) an electrical current input fixture in said housing to mate with a current source; d) controllable means in said housing adapted to be moved selectively to lock and unlock said appliance electrical supply cord standard prongs in said electrical receptacle in said housing; e) electrical current carrying connections between said current receiving prongs and said prong slots for said appliance electrical supply prongs, said current carrying connections including an on/off switch; and f) key operated control means in said housing operative to selectively lock said appliance electrical supply cord prongs to said housing concurrently with operation of said on/off switch to said current off position or to unlock said appliance electrical supply cord prongs concurrently with operation of said switch to current on position.
Claim 2
Dependent Claim
185 words
Electrical appliance current supply control apparatus for use with an appliance having a current supply cord with standard electrical current receiving plug prongs having standard sized apertures in the plug prongs, said control apparatus comprising: a) a housing: b) an electrical receptacle in said housing formed with prong slots to receive said appliance cord mounted plug formed with standard prongs; c) an electrical current input fixture in said housing to mate with a current source; d) controllable means in said housing adapted to be moved selectively to lock and unlock said appliance electrical supply cord standard prongs in said electrical receptacle in said housing; e) electrical current carrying connections between said current receiving prongs and said prong slots for said appliance electrical supply prongs, said current carrying connections including an on/off switch; and f) key operated control means in said housing operative to selectively lock said appliance electrical supply cord prongs to said housing concurrently with operation of said on/off switch to said current off position or to unlock said appliance electrical supply cord prongs concurrently with operation of said switch to current on position.
Claim 3
Dependent Claim
31 words
The apparatus set forth in claim 1 wherein said controllable means is a rocker means operatively mounted in said housing to be responsive to said control means and said on/off switch.
Claim 4
Dependent Claim
35 words
The apparatus set forth in claim 1 wherein said controllable means includes a bar member movable in a substantially linear path in said housing to be responsive to said control means and said on/off switch.
Claim 5
Dependent Claim
157 words
In electrical appliance current control apparatus for disabling use of appliance plugs having prongs comprising in combination: a) a housing having a receptacle presented to receive the prongs of an appliance plug; b) a prong engaging spring retainer normally in raised out of prong engagement position; c) a shift bar movable in said housing and supported in an aperture in said housing open to the exterior to be in view; and d) key operated lock means having an operative connection with said shift bar for moving said bar in a first direction upon locking operation of said locking means to close said spring retainer upon one of said prongs to retain the appliance plug attached to said housing, said key operated lock being operative to move said bar to a second position to be at least partly in view outside said housing concurrently with said spring retainer returning to its normally raised out of prong engagement position.
Claim 6
Dependent Claim
157 words
In electrical appliance current control apparatus for disabling use of appliance plugs having prongs comprising in combination: a) a housing having a receptacle presented to receive the prongs of an appliance plug; b) a prong engaging spring retainer normally in raised out of prong engagement position; c) a shift bar movable in said housing and supported in an aperture in said housing open to the exterior to be in view; and d) key operated lock means having an operative connection with said shift bar for moving said bar in a first direction upon locking operation of said locking means to close said spring retainer upon one of said prongs to retain the appliance plug attached to said housing, said key operated lock being operative to move said bar to a second position to be at least partly in view outside said housing concurrently with said spring retainer returning to its normally raised out of prong engagement position.
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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) | 1997-08-15 | 1998-02-14 | 1998-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-15 | 2002-02-14 | 2002-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-15 | 2006-02-14 | 2006-08-16 | $7700.00 | Window Closed / Lapsed |