Patent US4310873A successfully refreshed from Google Patents.
US4310873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key hole light illuminator
Assignee: CHANG AN LO
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Filing: 1980-03-24
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Granted: 1982-01-12
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Expires: 2000-03-24
Abstract
Abstract A structure for mounting adjacent a key hole, having means therein for illuminating said key hole. The outside cover provides a large area contact surface for activating the light. The circuitry is updated electronic components to provide a touch contact switch and a short period timer. The battery is a voltage cell and the light is a light emitting diode.
Inventors
- 👤 Stanley R. Bean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:31
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/10; Y; Y10; Y10S; Y10S362/00; Y10S362/80
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A unitized structure for illuminating a point-source area, such as a key hole, comprising: a housing for mounting adjacent said area; electrical components for providing said illumination fixedly positioned within said structure; a cover of resilient material removably positioned in sealing engagement with said structure; said electrical components further including a switch having an oversize contact positioned adjacent the inside wall of said resilient cover; a voltage cell and an illuminator interconnected and disconnected by said switch; and a timer associated with said switch to connect said voltage cell to said illuminator for a present time and thereafter disconnect the same.
Claim 2
Dependent Claim
101 words
A unitized structure for illuminating a point-source area, such as a key hole, comprising: a housing for mounting adjacent said area; electrical components for providing said illumination fixedly positioned within said structure; a cover of resilient material removably positioned in sealing engagement with said structure; said electrical components further including a switch having an oversize contact positioned adjacent the inside wall of said resilient cover; a voltage cell and an illuminator interconnected and disconnected by said switch; and a timer associated with said switch to connect said voltage cell to said illuminator for a present time and thereafter disconnect the same.
Claim 3
Dependent Claim
15 words
The illuminator structure of claim 1 wherein said mounting structure further includes a transparent bottom.
Claim 4
Dependent Claim
14 words
The illuminator structure of claim 1 wherein said illuminator is a light emitting diode.
Claim 5
Dependent Claim
37 words
The illuminator structure of claim 1 wherein said housing comprises a two part back and wherein the part between the other part and the structure wherein it is mounted, has a lesser diameter in width and length.
Claim 6
Dependent Claim
43 words
The illuminator structure of claim 4 wherein said resilient cover includes a right angle edge on the sides and bottom, and a reentrant portion at its top, adapted to be slidingly inserted over said housing in the area between said two part back.
References Cited (Backward Citations)
US4037221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |