US3693147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting and warning the unused state of a vehicle seat belt
Assignee: Tokai Rika Co Ltd
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Filing: 1971-01-20
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Granted: 1972-09-19
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Expires: 1991-01-20
Abstract
Abstract A device for detecting and warning the unused state of a vehicle seat belt, comprising a detecting circuit having seat switches adapted to be closed on sensing the occupation of the seats and belt switches adapted to be opened by drawing out a given length of seat belt to wear.
Inventors
- 👤 Kiyokazu Seo
- 👤 Yoshihiro Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:32
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/48; B60R22/34; B60R2022/4808; B60R2022/4816; B60R2022/4825; B60R2022/4858; B60R2022/4866
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
233 words
A system for a vehicle for detecting and indicating the unused state of seat belts, comprising: a power source; a power-off switch connected in series with said power source; alarm means connected in series with said power-off switch; and a detecting circuit connected in series with said alarm means and divided into at least two parallel branch circuits, said detecting circuit including first normally open switch means associated with the driver''s seat and adapted to be closed on sensing the occupation of the driver''s seat, said first switch means being associated with both of said branch circuits; one of said branch circuits including second normally closed switch means coacting with the seat belt associated with the driver''s seat and adapted to be opened on sensing the drawing out motion of a given length of the seat belt, said second switch means being connected in series with said first switch means; the other branch circuit including third normally open switch means associated with a passenger''s seat and adapted to be closed on sensing the occupation of the passenger''s seat, and fourth normally closed switch means coacting with the seat belt associated with the passenger''s seat and adapted to be opened on sensing the drawing-out motion of a given length of the seat belt, the third and fourth switch means being connected in series with one another and in series with said first switch means.
Claim 2
Independent Claim
233 words
A system for a vehicle for detecting and indicating the unused state of seat belts, comprising: a power source; a power-off switch connected in series with said power source; alarm means connected in series with said power-off switch; and a detecting circuit connected in series with said alarm means and divided into at least two parallel branch circuits, said detecting circuit including first normally open switch means associated with the driver''s seat and adapted to be closed on sensing the occupation of the driver''s seat, said first switch means being associated with both of said branch circuits; one of said branch circuits including second normally closed switch means coacting with the seat belt associated with the driver''s seat and adapted to be opened on sensing the drawing out motion of a given length of the seat belt, said second switch means being connected in series with said first switch means; the other branch circuit including third normally open switch means associated with a passenger''s seat and adapted to be closed on sensing the occupation of the passenger''s seat, and fourth normally closed switch means coacting with the seat belt associated with the passenger''s seat and adapted to be opened on sensing the drawing-out motion of a given length of the seat belt, the third and fourth switch means being connected in series with one another and in series with said first switch means.
Claim 3
Dependent Claim
57 words
A system according to claim 1, wherein said first switch means includes two sets of contacts contacts connected in parallel with one another and in series with said alarm means, one set of contacts being included in one of said branch circuits and the other set of contacts being included in the other of said branch circuits.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |