Patent US4769629A successfully refreshed from Google Patents.
US4769629A
Expired / Lapsed
US
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Stop light for a motorcyclist's helmet
Assignee: STONE JOHN N JR HOUSTON HARRIS COUNTY
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Filing: 1987-08-20
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Granted: 1988-09-06
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Expires: 2007-08-20
Abstract
Abstract An apparatus for actuating and deactuating a brake light affixed to a motorcyclist's helmet without any interface to the motorcycle. The apparatus illuminates and extinguishes the light by sensing the acceleration and deceleration forces.
Inventors
- 👤 David C. Tigwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:32
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/0406; A42B3/0433; A42B3/0453; B; B62; B62J; B62J6/00; B62J6/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
65 words
A stop light for a motorcyclist's helmet comprising, a motorcyclist's helmet, a light positioned on the helmet, a first accelerometer for measuring deceleration positioned on the helmet for lighting the light and a second accelerometer for measuring acceleration for turning off said light positioned on the helmet, a voltage source connected to the light for actuating the light upon measurement of deceleration by the accelerometer.
Claim 2
Dependent Claim
65 words
A stop light for a motorcyclist's helmet comprising, a motorcyclist's helmet, a light positioned on the helmet, a first accelerometer for measuring deceleration positioned on the helmet for lighting the light and a second accelerometer for measuring acceleration for turning off said light positioned on the helmet, a voltage source connected to the light for actuating the light upon measurement of deceleration by the accelerometer.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 wherein the first and second accelerometer are first and second mercury switches positioned at an angle to horizontal, but in opposite directions.
Claim 4
Dependent Claim
27 words
The apparatus of claim 1 wherein the first and second accelerometer are first and second mercury switches positioned at an angle to horizontal, but in opposite directions.
Claim 5
Dependent Claim
65 words
A stop light for a motorcyclist's helmet comprising, a light adapted to be positioned on a helmet, electrical switch means controlling the actuation of the light, a multivibrator connected to and controlling the switch, a first accelerometer for measuring deceleration and connected to the multivibrator for actuating the light, a second accelerometer for measuring acceleration and connected to the multivibrator for turning off the light.
Claim 6
Dependent Claim
65 words
A stop light for a motorcyclist's helmet comprising, a light adapted to be positioned on a helmet, electrical switch means controlling the actuation of the light, a multivibrator connected to and controlling the switch, a first accelerometer for measuring deceleration and connected to the multivibrator for actuating the light, a second accelerometer for measuring acceleration and connected to the multivibrator for turning off the light.
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) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |