Patent US4674813A successfully refreshed from Google Patents.
US4674813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical lock
Assignee: Individual
•
Filing: 1986-05-27
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Granted: 1987-06-23
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Expires: 2006-05-27
Abstract
Abstract A theft protection system for an electrical instrument includes a metal jacket power cord having an enlarged plug at each end. The base of a first locking device is secured to the instrument and one end of the cord is plugged into a socket on the instrument. Thereafter, a cover is placed over the plug and socket and is locked to the base with the cord passing through a slotted opening in the cover. A second base member in the form of a plate is secured to a standard duplex electrical outlet. The plug at the other end of the cord is inserted into the electrical socket and is then covered by a cover member which is locked to the base plate. The cord cannot be removed from the wall outlet or the instrument without unlocking the cover members.
Inventors
- 👤 Raymond Feldner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:58
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/639; H01R13/6397
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
220 words
A theft prevention system for an electrical instrument of the type which includes an electrical socket thereon which is adapted to be connected to a power cord for supplying electrical power to said instrument, said system comprising: an electrical power cord having a metal jacket covering the same throughout substantially the entire length thereof, a first enlarged plug at one end of said cord adapted to be plugged into said electrical socket on said instrument and a second enlarged plug at the other end of said cord adapted to be plugged into a standard electrical power outlet; first and second locking devices, each of which includes a base member and a cover member therefor; the base member of said first locking device being secured to said instrument adjacent said socket; the base member of said second locking device being secured to said electrical outlet; a slotted opening associated with each locking device, each slotted opening allowing said power cord to pass therethrough but preventing the plugs from doing the same, and key locking means on each cover member locking the same to its respective base member whereby when said cover members are locked in place, said plugs cannot be unplugged and said locking devices and said cord physically secure said instrument to said outlet to prevent theft of said instrument.
Claim 2
Dependent Claim
220 words
A theft prevention system for an electrical instrument of the type which includes an electrical socket thereon which is adapted to be connected to a power cord for supplying electrical power to said instrument, said system comprising: an electrical power cord having a metal jacket covering the same throughout substantially the entire length thereof, a first enlarged plug at one end of said cord adapted to be plugged into said electrical socket on said instrument and a second enlarged plug at the other end of said cord adapted to be plugged into a standard electrical power outlet; first and second locking devices, each of which includes a base member and a cover member therefor; the base member of said first locking device being secured to said instrument adjacent said socket; the base member of said second locking device being secured to said electrical outlet; a slotted opening associated with each locking device, each slotted opening allowing said power cord to pass therethrough but preventing the plugs from doing the same, and key locking means on each cover member locking the same to its respective base member whereby when said cover members are locked in place, said plugs cannot be unplugged and said locking devices and said cord physically secure said instrument to said outlet to prevent theft of said instrument.
Claim 3
Dependent Claim
34 words
The invention as claimed in claim 1 wherein said base member of said first locking device is adapted to be secured to said instrument through screws which normally secure said socket to said instrument.
Claim 4
Dependent Claim
58 words
The invention as claimed in claim 1 wherein said base member of said second locking device includes a substantially rectangularly shaped plate having a pair of openings therein adapted to overlie the electrical sockets of a duplex outlet, said plate having a substantially centrally located screw opening through which said plate can be secured to said duplex outlet.
Claim 5
Dependent Claim
22 words
The invention as claimed in claim 3 further including a substantially rigid reinforcing bar mounted on said plate adjacent said screw opening.
Claim 6
Dependent Claim
22 words
The invention as claimed in claim 3 further including a compressible foam gasket member interposed between said plate and said duplex outlet.
References Cited (Backward Citations)
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US4479688A
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Cited
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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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |