US3886516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat belt operation detector
Assignee: Mitsubishi Electric Corp
•
Filing: 1973-07-17
•
Granted: 1975-05-27
•
Expires: 1993-07-17
Abstract
Abstract A seat belt operation detector includes a first detector means for actuating at the time of sitting on a seat and a second detector means for actuating at the time of connecting of a seat belt. A flip-flop circuit responds to signals of the first and second detector means such that a normal connecting of the seat belt can be detected only when the signal of the first detector is applied to the flip-flop circuit and then the signal of the second detector is applied to the flip-flop. An alarm is operated or an engine is prevented from being started at abnormal or improper seat belt connecting conditions since the two detector signals will be received in different order or only one of the signals will be received when there is not seat belt use.
Inventors
- 👤 Masaru Itoh
- 👤 Kosaku Uota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:03
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/48; F; F02; F02N; F02N15/00; F02N15/10; B60R2022/4808; B60R2022/4816; B60R2022/4858; B60R2022/4883; B60R2022/4891
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
177 words
A seat belt operation detector for a vehicle having an engine comprising: a seat switch which is normally open but which closes when a seat in the vehicle is occupied, a belt switch which is normally open but which closes when a seat belt in the vehicle is utilized. a flip-flop having first and second inputs and output and which generates a first predetermined signal from its output when a first signal is applied to its first input and which generates a second predetermined signal from its output when a second signal is applied to its second input, means for starting the vehicle engine responsive to the first predetermined signal to prohibit the engine from starting and responsive to the second predetermined signal to permit the engine to start, means connecting the seat switch between the first input of the flip-flop and a power source, means connecting the belt switch between the second input of the flip-flop and a power source, and means connecting the output of the flip-flop to the means for starting the vehicle engine.
Claim 2
Dependent Claim
177 words
A seat belt operation detector for a vehicle having an engine comprising: a seat switch which is normally open but which closes when a seat in the vehicle is occupied, a belt switch which is normally open but which closes when a seat belt in the vehicle is utilized. a flip-flop having first and second inputs and output and which generates a first predetermined signal from its output when a first signal is applied to its first input and which generates a second predetermined signal from its output when a second signal is applied to its second input, means for starting the vehicle engine responsive to the first predetermined signal to prohibit the engine from starting and responsive to the second predetermined signal to permit the engine to start, means connecting the seat switch between the first input of the flip-flop and a power source, means connecting the belt switch between the second input of the flip-flop and a power source, and means connecting the output of the flip-flop to the means for starting the vehicle engine.
Claim 3
Dependent Claim
59 words
A seat belt operation detector for a vehicle having an engine in accordance with claim 1 wherein the means connecting the seat switch between the first input of the flip-flop and a power source comprises a capacitor and wherein the means connecting the belt switch between the second input of the flip-flop and a power source comprises a capacitor.
Claim 4
Dependent Claim
27 words
A seat belt operation detector for a vehicle having an engine in accordance with claim 2 wherein a capacitor is connected in parallel with the seat switch.
Claim 5
Dependent Claim
61 words
A seat belt operation detector for a vehicle having an engine in accordance with claim 2 wherein the means for starting the vehicle engine comprises a transistor connected to a relay which permits the engine to start when the transistor is not in a conductive state and which prohibits the engine from starting when the transistor is in a conductive state.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |