US4608501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tripping apparatus for an occupant protection apparatus in vehicles
Assignee: Daimler Benz AG
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Filing: 1985-01-09
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Granted: 1986-08-26
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Expires: 2005-01-09
Abstract
Abstract Tripping apparatus in vehicles for an occupant protection apparatus in impact restraining systems is provided with a test circuit which permits a testing of the evaluation circuit and of the switching stage of the tripping apparatus by means of an alternating voltage signal without interrupting the functional readiness of the apparatus. The test circuit consists of a series arrangement of a filter, a maximum value rectifier and an integrator and is inserted between the output of the switching stage and the input of the evaluation circuit.
Inventors
- 👤 Rudolf Andres
- 👤 Hansjurgen Scholz
- 👤 Heinz W. Knoll
- 👤 Luigi Brambilla
- 👤 Volker Petri
- 👤 Alban Bossenmaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:12
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/01; B60R21/017; B60R21/0173
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
A tripping apparatus in vehicles, particularly for an occupant protection apparatus in impact restraining systems, having an acceleration sensor, an evaluation circuit and a switching stage serially connected as input to a tripping element in series with an acceleration switch comprising a test circuit comprising a series arrangement of a filter tuned to a predetermined frequency, a rectifier and an integrator, and an input circuit means comprising a test generator for introducing to the series arrangement, a test signal comprising an alternating voltage having said predetermined frequency, the input circuit means being connected to a predetermined point of zero potential in the inactive condition, said point being located between the switching stage and the tripping element, and an output means of the test circuit connected to the input of the evaluation circuit, for producing an answering signal at the output of the test circuit.
Claim 2
Dependent Claim
144 words
A tripping apparatus in vehicles, particularly for an occupant protection apparatus in impact restraining systems, having an acceleration sensor, an evaluation circuit and a switching stage serially connected as input to a tripping element in series with an acceleration switch comprising a test circuit comprising a series arrangement of a filter tuned to a predetermined frequency, a rectifier and an integrator, and an input circuit means comprising a test generator for introducing to the series arrangement, a test signal comprising an alternating voltage having said predetermined frequency, the input circuit means being connected to a predetermined point of zero potential in the inactive condition, said point being located between the switching stage and the tripping element, and an output means of the test circuit connected to the input of the evaluation circuit, for producing an answering signal at the output of the test circuit.
Claim 3
Dependent Claim
30 words
A tripping apparatus according to claim 1, wherein the filter comprises a series oscillation circuit which is connected between the input circuit means of the test circuit and the rectifier.
Claim 4
Dependent Claim
33 words
A tripping apparatus according to claim 1, wherein the filter is constructed as a parallel oscillation circuit, which is connected through a capacitor between the predetermined point and the input to the rectifier.
References Cited (Backward Citations)
US3622974A
Cited
US3601655A
Cited
US3629816A
Cited
US3633159A
Cited
US3745523A
Cited
US3863208A
Cited
US4158191A
Cited
US4410875A
Cited
US4381829A
Cited
US4359715A
Cited
US4366465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |