US4546416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorescent flash-light
Assignee: SATO GIICHIRO
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Filing: 1984-01-30
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Granted: 1985-10-08
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Expires: 2004-01-30
Abstract
Abstract A flashlight is fabricated from a conventional design and a conventional means for energizing it. The flashlight has a casing for holding the batteries. The casing is closed at one end and the other end is flared for holding the reflective dish, which has the bulb secured through an opening in its base. A transparent lens seals the volume of the dish. A bezel or rim attaches around the circumference of the lens. The bezel is made of a translucent plastic material, which has a phosphor material embedded into it. When the bulb is energized, the light beam touches the periphery of the bezel as it shines and charges the phosphor material. The flashlight and bezel can also be left in the sunlight to charge the phosphor material. After the phosphor material has been charged, the bezel emits a long-lasting glow called phosphorescence so that the flashlight can be found in the dark.
Inventors
- 👤 J. C. Pemberton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:06
CPC Classifications
F; F21; F21L; F21L4/00; F21L4/005; F21V; F21V13/00; F21V13/12; F21V13/14; F21V9/00; F21V9/30; F21V9/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
A portable flashlight comprising: a casing having a flared opening at one end and closed at the other end for holding a battery; a reflector dish having a light bulb positioned at its base, said dish placed into the open end of said casing for reflecting the light from said bulb whenever said bulb is energized; a lens placed against the face of said reflector for dispersing the light emitting from said energized bulb; a bezel attached around said lens having a rim containing a phosphor material and extending forwardly of said lens in position to receive light from said bulb, thereby to charge said phosphor material whenever said bulb is energized, whereby the flashlight may be visually located in a dark area when said bulb is not energized.
Claim 2
Dependent Claim
129 words
A portable flashlight comprising: a casing having a flared opening at one end and closed at the other end for holding a battery; a reflector dish having a light bulb positioned at its base, said dish placed into the open end of said casing for reflecting the light from said bulb whenever said bulb is energized; a lens placed against the face of said reflector for dispersing the light emitting from said energized bulb; a bezel attached around said lens having a rim containing a phosphor material and extending forwardly of said lens in position to receive light from said bulb, thereby to charge said phosphor material whenever said bulb is energized, whereby the flashlight may be visually located in a dark area when said bulb is not energized.
Claim 3
Dependent Claim
50 words
The flashlight as recited in claim 1 wherein said bezel comprises a plastic material embedded with a phosphor material for storing light radiation from said bulb while said bulb is energized and thereafter phosphorescing after said bulb is de-energized enough to be visible in the dark over a given period.
Claim 4
Dependent Claim
25 words
The flashlight as recited in claim 2 wherein said bezel comprises a ring having a beveled interior rim and threadably attached to said flared opening.
Claim 5
Independent Claim
76 words
A device for seeing a portable flashlight in the dark comprising: a bezel attached around the lens of a flashlight and made of a phosphor material; said bezel having a rim extending forwardly of the lens and in position to receive light from the bulb, thereby to charge said phosphor material whenever the bulb of the flashlight is energized, whereby the flashlight may be visually located in a dark area when the bulb is not energized.
Claim 6
Independent Claim
76 words
A device for seeing a portable flashlight in the dark comprising: a bezel attached around the lens of a flashlight and made of a phosphor material; said bezel having a rim extending forwardly of the lens and in position to receive light from the bulb, thereby to charge said phosphor material whenever the bulb of the flashlight is energized, whereby the flashlight may be visually located in a dark area when the bulb is not energized.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |