US4782971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preventing the unauthorized use of an electrical apparatus
Assignee: Individual
•
Filing: 1987-08-11
•
Granted: 1988-11-08
•
Expires: 2007-08-11
Abstract
Abstract A lock box for preventing unauthorized use of electrical appliances is disclosed. The lock box is adapted to receive the plug end of an electrical cord to prevent the appliance from being plugged into an electrical socket. The lock box includes a drawered cabinet arrangement wherein the drawer has a slot sized and shaped such that the electrical cord, but not the plug itself, may freely pass therethrough. A locking mechanism is provided to facilitate locking the drawer with the plug closed inside, thereby preventing unauthorized use. The lock box does not contain any electrical parts and therefor may be safely used in virtually any environment. A method of preventing the unauthorized use of electrical appliances is also disclosed.
Inventors
- 👤 Mary V. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:16
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/639; H01R13/6397
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A lock box adapted for receiving a plug attached to a cord from an electrical apparatus to prevent the use of the apparatus, said lock box comprising: a substantially enclosed housing including a top wall and an open end; a drawer adapted to slide into and out of said housing through said open end, said drawer including a front panel, a back panel, and a pair of side panels; a catch stop protruding downwardly from said top wall into the interior of said housing, said catch stop being positioned adjacent to said open end; a slot in communication with an edge of said front panel of said drawer, said slot being sized large enough to allow the cord to freely pass therethrough, but small enough to prevent the plug from passing therethrough when the drawer is shut; and a key operated barrel lock mounted on said front panel that selectively engages said catch stop to selectively prevent said drawer from being slid open.
Claim 2
Dependent Claim
163 words
A lock box adapted for receiving a plug attached to a cord from an electrical apparatus to prevent the use of the apparatus, said lock box comprising: a substantially enclosed housing including a top wall and an open end; a drawer adapted to slide into and out of said housing through said open end, said drawer including a front panel, a back panel, and a pair of side panels; a catch stop protruding downwardly from said top wall into the interior of said housing, said catch stop being positioned adjacent to said open end; a slot in communication with an edge of said front panel of said drawer, said slot being sized large enough to allow the cord to freely pass therethrough, but small enough to prevent the plug from passing therethrough when the drawer is shut; and a key operated barrel lock mounted on said front panel that selectively engages said catch stop to selectively prevent said drawer from being slid open.
Claim 3
Dependent Claim
46 words
A lock box as recited in claim 1 wherein said back panel engages said catch stop when said drawer is slid out of said housing and wherein said drawer must be tilted with respect to said housing in order to detach said drawer from said housing.
Claim 4
Dependent Claim
39 words
A lock box as recited in claim 2 wherein the dimensions of said slot are substantially in the range of one-quarter inch to one-half inch wide and in the range of three-quarters inch to one and one-half inches long.
Claim 5
Dependent Claim
25 words
A lock box as recited in claim 3 further comprising a handle disposed on said front panel of said drawer to facilitate sliding said drawer.
Claim 6
Dependent Claim
18 words
A lock box as recited in claim 4 wherein said housing and said drawer are fashioned from plastic.
Claim 7
Dependent Claim
18 words
A lock box as recited in claim 5 wherein said housing and said drawer are fashioned from polystyrene.
Claim 8
Dependent Claim
189 words
A lock box adapted for receiving a plug attached to a cord from an electrical apparatus to prevent the use of the apparatus, said lock box comprising: a substantially enclosed housing including a top wall and an open end; a drawer adapted to slide into and out of said housing through said open end, said drawer including a front panel, a back panel, and a pair of side panels; a catch stop protruding downwardly from said top wall into the interior of said housing, said catch stop being positioned adjacent to said open end such that said back panel engages said catch stop when said drawer is slid out of said housing and wherein said drawer must be tilted with respect to said housing in order to detach said drawer from said housing. a slot in communication with an edge of said front panel of said drawer, said slot being sized large enough to allow the cord to freely pass therethrough, but small enough to prevent the plug from passing therethrough when the drawer is shut; and a lock adapted to selectively prevent said drawer from being slid open.
Claim 9
Dependent Claim
189 words
A lock box adapted for receiving a plug attached to a cord from an electrical apparatus to prevent the use of the apparatus, said lock box comprising: a substantially enclosed housing including a top wall and an open end; a drawer adapted to slide into and out of said housing through said open end, said drawer including a front panel, a back panel, and a pair of side panels; a catch stop protruding downwardly from said top wall into the interior of said housing, said catch stop being positioned adjacent to said open end such that said back panel engages said catch stop when said drawer is slid out of said housing and wherein said drawer must be tilted with respect to said housing in order to detach said drawer from said housing. a slot in communication with an edge of said front panel of said drawer, said slot being sized large enough to allow the cord to freely pass therethrough, but small enough to prevent the plug from passing therethrough when the drawer is shut; and a lock adapted to selectively prevent said drawer from being slid open.
Claim 10
Dependent Claim
36 words
A lock box as recited in claim 7 wherein said lock comprises a key operated barrel lock mounted on said front panel that selectively engages said catch stop to prevent said drawer from being slid open.
Claim 11
Dependent Claim
39 words
A lock box as recited in claim 7 wherein the dimensions of said slot are substantially in the range of one-quarter inch to one-half inch wide and in the range of three-quarters inch to one and one-half inches long.
Claim 12
Dependent Claim
25 words
A lock box as recited in claim 9 further comprising a handle disposed on said front panel of said drawer to facilitate sliding said drawer.
References Cited (Backward Citations)
US2643787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |