Patent US1538469A successfully refreshed from Google Patents.
US4413488A
Expired / Lapsed
US
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Electrical appliance lock
Assignee: Iowa State University Research Foundation Inc
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Filing: 1980-12-22
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Granted: 1983-11-08
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Expires: 2000-12-22
Abstract
Abstract An electrical appliance lock comprising a first portion having an opening formed therein for receiving the shackle of a conventional padlock and having an elongated member secured thereto at one side thereof and extending therefrom. The elongated member is adapted to extend through the opening in at least two prongs of the electrical appliance plug, which are positioned on opposite sides of the shackle. A modified form of the lock is also described wherein the elongated member has a U-shaped portion at one end thereof which is secured to the shackle-engaging portion.
Inventors
- 👤 Herbert A. Harmison, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:45
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/639; H01R13/6397; H01R13/44; Y; Y10; Y10T; Y10T70/00; Y10T70/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A locking device for an electrical appliance plug, comprising, a shackle engaging portion having an opening formed therein for receiving a padlock shackle comprising a U-shaped portion, said shackle engaging portion having an elongated member extending therefrom adapted to extend through the openings in at least two prongs of the plug, said elongated member and said plug being positioned on opposite sides of the shackle with at least one of said prongs extending through said U-shaped portion of said shackle.
Claim 2
Dependent Claim
80 words
A locking device for an electrical appliance plug, comprising, a shackle engaging portion having an opening formed therein for receiving a padlock shackle comprising a U-shaped portion, said shackle engaging portion having an elongated member extending therefrom adapted to extend through the openings in at least two prongs of the plug, said elongated member and said plug being positioned on opposite sides of the shackle with at least one of said prongs extending through said U-shaped portion of said shackle.
Claim 3
Dependent Claim
17 words
The locking device of claim 1 wherein said shackle engaging portion comprises a substantially flat support means.
Claim 4
Dependent Claim
20 words
The locking device of claim 2 wherein said elongated member is secured to said support means at one side thereof.
Claim 5
Dependent Claim
62 words
The locking device of claim 1 wherein said elongated member is positioned at one side of the shackle and wherein the plug is positioned on the other side of the shackle with the shackle being received between the prongs of the plug so that the openings in the prongs are positioned on the same side of the shackle as the elongated member.
Claim 6
Dependent Claim
39 words
The locking device of claim 3 wherein said elongated member has a U-shaped portion at one end thereof which is secured to said support means so that said elongated member dwells in a plane spaced from said support means.
References Cited (Backward Citations)
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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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |