Patent US5071360A successfully refreshed from Google Patents.
US5071360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanently attachable key-activated on/off switch
Assignee: Individual
•
Filing: 1990-05-17
•
Granted: 1991-12-10
•
Expires: 2010-05-17
Abstract
Abstract A permanently attachable key-activated on-off switch comprises a housing with an electrical receptacle on one end and an electrical plug on the other. The electrical receptacle receives a locking pin that is inserted through the prongs of the receptacle and an appliance plug in the receptacle so that the appliance plug is permanently attached. A key switch is attached to the housing which controls and the flow of power between the electrical plug and the electrical receptacle when the electrical plug is inserted into a standard electrical outlet.
Inventors
- 👤 Edgar J. Lindow
- 👤 Denise L. Domning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:08
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/639; H01R13/6395; H01R13/66; H01R13/70; H01R13/6397
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
A device for preventing the unauthorized use of an electrical appliance, said appliance having a standard electrical plug with standard electrical prongs extending therefrom, said prongs having holes located near the distal end thereof, said device comprising: an electrical receptacle for receiving said plug of said appliance; an electrical plug for receiving an electrical current; means for selectively interrupting and reestablishing the flow of current to said appliance, thereby controlling the unauthorized or authorized use of said appliance; and means for permanently engaging said prongs of the plug of said electrical appliance after said prongs of the plug are fully inserted into said receptacle, said means requiring separate manipulation for engagement after such insertion, such that said plug is retained within said device, the removability of said plug from said device being independent from an unaffected by the connectivity state of said means for selectively interrupting and reestablishing the flow of current to said appliance.
Claim 2
Independent Claim
155 words
A device for preventing the unauthorized use of an electrical appliance, said appliance having a standard electrical plug with standard electrical prongs extending therefrom, said prongs having holes located near the distal end thereof, said device comprising: an electrical receptacle for receiving said plug of said appliance; an electrical plug for receiving an electrical current; means for selectively interrupting and reestablishing the flow of current to said appliance, thereby controlling the unauthorized or authorized use of said appliance; and means for permanently engaging said prongs of the plug of said electrical appliance after said prongs of the plug are fully inserted into said receptacle, said means requiring separate manipulation for engagement after such insertion, such that said plug is retained within said device, the removability of said plug from said device being independent from an unaffected by the connectivity state of said means for selectively interrupting and reestablishing the flow of current to said appliance.
Claim 3
Independent Claim
152 words
A device for preventing the unauthorized use of an electrical appliance, said appliance having a standard electrical plug with standard electrical prongs extending therefrom, said prongs having holes located near the distal end thereof, said device comprising: an electrical receptacle for receiving said plug of said appliance; an electrical plug for receiving an electrical current; means for selectively interrupting and reestablishing the flow of current to said appliance, thereby controlling the unauthorized or authorized use of said appliance; and means for permanently engaging said prongs of the plug of said electrical appliance after said prongs of the plug are fully inserted into said receptacle, said means requiring separate manipulation for engagement after such insertion, such that said plug is retained within said device, said means for selectively interrupting and reestablishing current flow being capable of establishing current flow to said appliance independently of whether said prongs are engaged by said engaging means.
Claim 4
Independent Claim
152 words
A device for preventing the unauthorized use of an electrical appliance, said appliance having a standard electrical plug with standard electrical prongs extending therefrom, said prongs having holes located near the distal end thereof, said device comprising: an electrical receptacle for receiving said plug of said appliance; an electrical plug for receiving an electrical current; means for selectively interrupting and reestablishing the flow of current to said appliance, thereby controlling the unauthorized or authorized use of said appliance; and means for permanently engaging said prongs of the plug of said electrical appliance after said prongs of the plug are fully inserted into said receptacle, said means requiring separate manipulation for engagement after such insertion, such that said plug is retained within said device, said means for selectively interrupting and reestablishing current flow being capable of establishing current flow to said appliance independently of whether said prongs are engaged by said engaging means.
References Cited (Backward Citations)
US3345603A
Cited
US3543218A
Cited
US3691327A
Cited
US4080029A
Cited
US4085991A
Cited
US4136919A
Cited
US4167658A
Cited
US4445738A
Cited
US4479688A
Cited
US4482789A
Cited
US4579410A
Cited
US4969833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |