Patent US6939789B2 successfully refreshed from Google Patents.
US4835665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency flashlight
Assignee: Individual
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Filing: 1988-06-08
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Granted: 1989-05-30
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Expires: 2008-06-08
Abstract
Abstract A flashlight having a compass and a detection box on its front end. The detection box has an auxiliary battery inside of it which operates separately from the main dry cell batteries of the flashlight. The auxiliary battery activates a sounder to emit beeping or buzzing noise and simultaneously activates a user lamp to flash short bursts of bright light when the control switch of the detection box is switched on.
Inventors
- 👤 Fon-San Kao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:41
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
In a flashlight comprising a housing (1), a main lamp (11), an ON/OFF switch (13), and dry cell batteries, the improvement comprising the combination of: (a) an enclosed detection box (2) being fixed on an outer front surface of said housing (1); said detection box (2) having a user lamp (21), a sounder (22), an auxiliary battery (23) and a control switch (24) therein; said auxiliary battery (3) driving a frequency generator (5) which in turns causes said sounder (22) to emit a beeping or buzzing noise, said auxiliary battery (3) also driving a flashing circuit (6) which in turn drives said user lamp (21) to flash bright bursts of light for short periods of time, said frequency generator (5) and said flashing circuit (6) being in parallel with each other; and (b) a compass (12) fixed on the outer front surface of said housing (1) for determining the direction in which said flashlight is pointing.
Claim 2
Dependent Claim
156 words
In a flashlight comprising a housing (1), a main lamp (11), an ON/OFF switch (13), and dry cell batteries, the improvement comprising the combination of: (a) an enclosed detection box (2) being fixed on an outer front surface of said housing (1); said detection box (2) having a user lamp (21), a sounder (22), an auxiliary battery (23) and a control switch (24) therein; said auxiliary battery (3) driving a frequency generator (5) which in turns causes said sounder (22) to emit a beeping or buzzing noise, said auxiliary battery (3) also driving a flashing circuit (6) which in turn drives said user lamp (21) to flash bright bursts of light for short periods of time, said frequency generator (5) and said flashing circuit (6) being in parallel with each other; and (b) a compass (12) fixed on the outer front surface of said housing (1) for determining the direction in which said flashlight is pointing.
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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |