US4078248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock light
Assignee: Individual
•
Filing: 1976-09-08
•
Granted: 1978-03-07
•
Expires: 1996-09-08
Abstract
Abstract Keyhole illumination for a tumbler and cylinder lock comprising a miniature light source and a light transmitting pin in the pin holes.
Inventors
- 👤 Daniel Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:28
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
In a conventional cylinder type lock provided with a keyhole having a cylinder unit, a cylinder tumbler and tumbler pins in holes; the improvement comprising a minature light emitting means inserted entirely into a pin hole in the cylinder unit and a solid light transmitting tumbler pin inserted into a said pin hole in the tumbler unit through which the light shines into the keyhole thereby illuminating it.
Claim 2
Dependent Claim
68 words
In a conventional cylinder type lock provided with a keyhole having a cylinder unit, a cylinder tumbler and tumbler pins in holes; the improvement comprising a minature light emitting means inserted entirely into a pin hole in the cylinder unit and a solid light transmitting tumbler pin inserted into a said pin hole in the tumbler unit through which the light shines into the keyhole thereby illuminating it.
Claim 3
Dependent Claim
27 words
The lock of claim 1 wherein the light source further comprises a light conducting pipe suitably associated with a lamp which may be external to the lock.
Claim 4
Dependent Claim
12 words
The lock of claim 1 wherein the light source comprises a lamp.
Claim 5
Dependent Claim
14 words
The lock of claim 1 wherein the light source comprises a light emitting diode.
Claim 6
Dependent Claim
20 words
The lock of claim 1 further comprising electrical conductors connecting the light source to at least one electrical energy source.
Claim 7
Dependent Claim
17 words
The lock of claim 5 wherein the electrical energy source comprises at least one electrical storage battery.
Claim 8
Dependent Claim
19 words
The lock of claim 5 further comprising an electrical switch connected between the energy source and the light source.
Claim 9
Dependent Claim
15 words
The lock of claim 1 wherein the light transmitting pin comprises a light transmitting material.
Claim 10
Dependent Claim
13 words
The lock of claim 8 wherein the light transmitting material comprises methyl methacrylate.
Claim 11
Dependent Claim
12 words
The lock of claim 8 wherein the light transmitting material comprises glass.
References Cited (Backward Citations)
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Cited
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Cited
US2701297A
Cited
US2709745A
Cited
US2767303A
Cited
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Cited
US3719821A
Cited
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Cited
US3887803A
Cited
US3955075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |