US4862091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for testing the connecting lines of a switch or sensor
Assignee: Bayerische Motoren Werke AG
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Filing: 1988-07-20
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Granted: 1989-08-29
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Expires: 2008-07-20
Abstract
Abstract A circuit arrangement is disclosed for monitoring the connecting lines of a switch or sensor open in the normal condition, with a first ohmic resistance connected in series with the switch or sensor. That together with the switch or sensor and a second ohmic resistance connected in parallel to both forms a parallel circuit, whose first connecting line is connected to ground and whose second connecting line is connected, on the one hand, to a voltage supply by way of a third ohmic resistance and, on the other, with a voltage discriminator unit. The second ohmic resistance is adapted to be disconnected.
Inventors
- 👤 Helmut Hillebrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:27
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/01; B60R21/017; B60R21/0173; G; G01; G01R; G01R31/00; G01R31/50; G01R31/58; H; H01; H01H; H01H9/00; H01H9/16; H01H9/167
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A circuit arrangement for monitoring the connecting lines of a switchable device open in the normal condition, comprising: a first resistance means connected in series with said device; a second resistance means connected in parallel with the first resistance means and the device to form a parallel circuit; a first connecting line connecting said parallel circuit with ground potential; a second connecting line connecting said parallel circuit to a voltage supply means by way of a third resistance means and to a voltage discriminator means; a Zener diode in series with the second resistance and operable to disconnect the second resistance means; and said voltage supply means including a first output voltage larger then the breakdown voltage of the Zener diode and a second output voltage smaller than the breakdown voltage of the Zener diode, and means for selecting the first or second output voltage.
Claim 2
Dependent Claim
145 words
A circuit arrangement for monitoring the connecting lines of a switchable device open in the normal condition, comprising: a first resistance means connected in series with said device; a second resistance means connected in parallel with the first resistance means and the device to form a parallel circuit; a first connecting line connecting said parallel circuit with ground potential; a second connecting line connecting said parallel circuit to a voltage supply means by way of a third resistance means and to a voltage discriminator means; a Zener diode in series with the second resistance and operable to disconnect the second resistance means; and said voltage supply means including a first output voltage larger then the breakdown voltage of the Zener diode and a second output voltage smaller than the breakdown voltage of the Zener diode, and means for selecting the first or second output voltage.
Claim 3
Dependent Claim
14 words
A circuit arrangement according to claim 7, wherein said resistance means are ohmic resistances.
Claim 4
Dependent Claim
16 words
A circuit arrangement according to claim 7, wherein said device is one of switch or sensor.
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) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |